MyBatis官網:http://www.mybatis.org/mybatis-3/zh/index.htmlhtml
本文記錄springboot與mybatis的整合實例;一、以註解方式;二、手寫XML配置、逆向工程生成XML配置java
maven依賴mysql
<!-- springboot --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- MVC --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!--Thymeleaf模板依賴--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <!--熱部署工具dev-tools--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> </dependency> <!--添加MyBatis依賴 --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.1</version> </dependency> <!--添加MySQL驅動依賴 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency>
application.ymlgit
#注意:在yml文件中添加value值時,value前面須要加一個空格 #2.0.0的配置切換爲servlet.path而不是"-" server: port: 10086 #端口號 servlet: context-path: /springboot spring: thymeleaf: cache: false #關閉頁面緩存 prefix: classpath:/view/ #thymeleaf訪問根路徑 mode: LEGACYHTML5 datasource: #數據庫相關 url: jdbc:mysql://localhost:3306/test?characterEncoding=utf-8 username: root password: 123456 driver-class-name: com.mysql.jdbc.Driver mvc: date-format: yyyy-MM-dd HH:mm:ss #mvc接收參數時對日期進行格式化 jackson: date-format: yyyy-MM-dd HH:mm:ss #jackson對響應回去的日期參數進行格式化 time-zone: GMT+8 mybatis: configuration: map-underscore-to-camel-case: true #開啓駝峯映射
result,通用響應數據格式github
注:不想本身寫set、get方法的用lombok插件web
public class Result { private String message; private Integer status; private Object data; public Result() { } public Result(String message, Integer status, Object data) { this.message = message; this.status = status; this.data = data; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } public Integer getStatus() { return status; } public void setStatus(Integer status) { this.status = status; } public Object getData() { return data; } public void setData(Object data) { this.data = data; } @Override public String toString() { return "Result{" + "message='" + message + '\'' + ", status=" + status + ", data=" + data + '}'; } public static Result build(Integer status,String message,Object data){ return new Result(message,status,data); } }
user,實體類spring
注:不想本身寫set、get方法的用lombok插件sql
public class User { private Integer id; private String username; private String password; private Date created; public User(){} public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public Date getCreated() { return created; } public void setCreated(Date created) { this.created = created; } @Override public String toString() { return "User{" + "id=" + id + ", username='" + username + '\'' + ", password='" + password + '\'' + ", created=" + created + '}'; } }
表SQL數據庫
DROP TABLE IF EXISTS `tb_user`; CREATE TABLE `tb_user` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '表id', `username` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '用戶名', `password` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '密碼', `created` datetime NULL DEFAULT NULL COMMENT '建立時間',PRIMARY KEY (`id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 45 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '用戶信息表' ROW_FORMAT = Compact;
controller緩存
@RestController @RequestMapping("/user") public class UserController { @Autowired private UserService userService; @RequestMapping("/insert") public Result insert(User user) { return userService.insert(user); } @RequestMapping("/delete") public Result delete(User user) { return userService.delete(user); } @RequestMapping("/update") public Result update(User user) { return userService.update(user); } @RequestMapping("/select") public Result select(User user) { return userService.select(user); } }
service
public interface UserService { /** * 增 */ Result insert(User user); /** * 刪 */ Result delete(User user); /** * 改 */ Result update(User user); /** * 查 */ Result select(User user); }
@Service public class UserServiceImpl implements UserService { @Autowired private UserMapper userMapper; @Override public Result insert(User user) { int i = userMapper.insert(user); if (i > 0) { return Result.build(200, "操做成功!", user); } else { return Result.build(400, "操做失敗!", null); } } @Override public Result delete(User user) { int i = userMapper.delete(user); if (i > 0) { return Result.build(200, "操做成功!", user); } else { return Result.build(400, "操做失敗!", null); } } @Override public Result update(User user) { int i = userMapper.update(user); if (i > 0) { return select(user); } else { return Result.build(400, "操做失敗!", null); } } @Override public Result select(User user) { User user1 = userMapper.select(user); if (user1 != null) { return Result.build(200, "操做成功!", user1); } else { return Result.build(400, "操做失敗!", user1); } } }
接下來不一樣就是mapper映射了
工程結構
mapper.java
直接使用註解,@Insert、@Delete、@Update、@Select,前三個事務自動提交,不用咱們管理;增、刪、改返回的是影響的行數,當設置了主鍵自動遞增,須要返回自增主鍵時添加@Options(useGeneratedKeys = true),設置是否獲取主鍵並設置到模型實體屬性中;注意:insert接口返回的依舊是受影響的行數,但自增主鍵已經設置到了模型實體屬性中。
這裏介紹如下佔位符跟拼接符的區別:
佔位符 #{param}
佔位符在拼接sql的過程當中,會給指定的佔位符,加上引號
簡單類型傳參:
一、會忽略佔位符的名字
二、會忽略佔位符的數據類型
三、會忽略佔位符的順序,將傳進去的參加,依次賦給全部的佔位符
適用場景:
單一佔位符傳參查詢
拼接符 ${param}
拼接符至關於鏈接符合,把左右兩邊、本身拼接在一塊兒
一、不接受簡單類型傳參,只接收對象類型或者Map集合類型傳參
二、動態指定表名,列名,排序的方式(升序or降序)
@Mapper @Component(value = "UserMapper") public interface UserMapper { /** * 增 */ @Insert(value = "insert into tb_user(username,password,created) value(#{username},#{password},#{created})") @Options(useGeneratedKeys = true) int insert(User user); /** * 刪 */ @Delete("delete from tb_user where id = #{id}") int delete(User user); /** * 改 */ @Update(value = "update tb_user set username = #{username} where id = #{id}") int update(User user); /** * 查 */ @Select(value = "select * from tb_user where id = #{id}") User select(User user); }
工程目錄
加多了mybatis相關的XML配置文件
其餘部分都沒有變,變的只有如下部分:
application.yml的mybatis部分改爲,
mybatis: # 配置mapper的掃描,找到全部的mapper.xml映射文件 mapperLocations: classpath:conf/mybatis/mapper/*.xml # 加載全局的配置文件 configLocation: classpath:conf/mybatis/mybatis.cfg.xml
mapper.java
再也不使用註解,將SQL寫到XML裏面
@Mapper @Component(value = "UserMapper") public interface UserMapper { /** * 增 */ int insert(User user); /** * 刪 */ int delete(User user); /** * 改 */ int update(User user); /** * 查 */ User select(User user); }
mybatis.cgf.xml
這裏配置全局設置,但我這裏沒什麼要配的
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <!-- 全局配置文件 --> <configuration> </configuration>
UserMapper.xml
由於咱們的表主鍵是自動遞增,insert標籤使用useGeneratedKeys="true" keyProperty="id",模型實體屬性就會設置遞增後的值
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="cn.mapper.UserMapper"> <insert id="insert" useGeneratedKeys="true" keyProperty="id" parameterType="cn.pojo.User"> insert into tb_user(username,password,created) value(#{username},#{password},#{created}) </insert> <delete id="delete" parameterType="cn.pojo.User"> delete from tb_user where id = #{id} </delete> <update id="update" parameterType="cn.pojo.User"> update tb_user set username = #{username} where id = #{id} </update> <select id="select" parameterType="cn.pojo.User" resultType="cn.pojo.User"> select * from tb_user where id = #{id} </select> </mapper>
注意:本逆向工程例子是我以前畢業設計的表爲操做對象,爲了方便介紹,我直接用以前的項目作介紹
數據庫單表逆向生成單表對應的pojo實體、mapper.java、mapper.xml,無需手寫這幾個文件,生成的接口方法已經足夠知足大部分業務需求,實現快速開發,關於逆向工程的具體配置,請戳官網介紹:http://www.javashuo.com/article/p-ucavgype-cw.html 或這篇博客:Mybatis(七) mybatis的逆向工程的配置詳解
逆向工程項目結構
逆向工程配置文件genreatorConfig.xml,名字無所謂,只要在java程序中做爲file傳入就好 (存放生成文件的對應的包要提早建好,不然會找不到)
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <context id="testTables" targetRuntime="MyBatis3"> <commentGenerator> <!-- 是否去除自動生成的註釋 true:是 : false:否 --> <property name="suppressAllComments" value="true" /> </commentGenerator> <!--數據庫鏈接的信息:驅動類、鏈接地址、用戶名、密碼 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/cpsh" userId="root" password="123456"> </jdbcConnection> <!-- 默認false,把JDBC DECIMAL 和 NUMERIC 類型解析爲 Integer,爲 true時把JDBC DECIMAL 和 NUMERIC 類型解析爲java.math.BigDecimal --> <javaTypeResolver> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!-- targetProject:生成PO類的位置 --> <javaModelGenerator targetPackage="cn.gx.hzu.cpsh.common.pojo" targetProject=".\src"> <!-- enableSubPackages:是否讓schema做爲包的後綴 --> <property name="enableSubPackages" value="false" /> <!-- 從數據庫返回的值被清理先後的空格 --> <property name="trimStrings" value="true" /> </javaModelGenerator> <!-- targetProject:mapper映射文件.xml生成的位置 --> <sqlMapGenerator targetPackage="cn.gx.hzu.cpsh.common.mapper" targetProject=".\src"> <!-- enableSubPackages:是否讓schema做爲包的後綴 --> <property name="enableSubPackages" value="false" /> </sqlMapGenerator> <!-- targetPackage:mapper接口.java生成的位置 --> <javaClientGenerator type="XMLMAPPER" targetPackage="cn.gx.hzu.cpsh.common.mapper" targetProject=".\src"> <!-- enableSubPackages:是否讓schema做爲包的後綴 --> <property name="enableSubPackages" value="false" /> </javaClientGenerator> <!-- 指定數據庫表 --> <table schema="" tableName="t_ad"></table> <table schema="" tableName="t_admin"></table> <table schema="" tableName="t_ad_position"></table> <table schema="" tableName="t_chat"></table> <table schema="" tableName="t_purchase"></table> <table schema="" tableName="t_recommend"></table> <table schema="" tableName="t_sell"></table> <table schema="" tableName="t_type"></table> <table schema="" tableName="t_user"></table> <table schema="" tableName="t_user_datum"></table> <table schema="" tableName="t_notice"></table> </context> </generatorConfiguration>
GeneratorSqlmap.java 文件,配置好XML後,直接運行main函數就行
public class GeneratorSqlmap { public void generator() throws Exception{ List<String> warnings = new ArrayList<String>(); boolean overwrite = true; //指定 逆向工程配置文件 File configFile = new File("generatorConfig.xml"); ConfigurationParser cp = new ConfigurationParser(warnings); Configuration config = cp.parseConfiguration(configFile); DefaultShellCallback callback = new DefaultShellCallback(overwrite); MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings); myBatisGenerator.generate(null); } public static void main(String[] args) throws Exception { try { GeneratorSqlmap generatorSqlmap = new GeneratorSqlmap(); generatorSqlmap.generator(); } catch (Exception e) { e.printStackTrace(); } } }
生成後整體的效果
pojo.java
數據庫字段若是是有大寫字母,逆向工程生成的實體類中的屬性全都是小寫
數據庫字段若是有下劃線,逆向工程生成的實體類中下劃線後面的字母會以大寫開頭
public class TUser { private Integer id; private String username; private String password; private String phone; private String eamil; private Integer credit; private String registerTime; private String loginTime; private String loginCity; private String logoutTime; private String chatId; private Integer isAuthentication; private Integer status; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username == null ? null : username.trim(); } public String getPassword() { return password; } public void setPassword(String password) { this.password = password == null ? null : password.trim(); } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone == null ? null : phone.trim(); } public String getEamil() { return eamil; } public void setEamil(String eamil) { this.eamil = eamil == null ? null : eamil.trim(); } public Integer getCredit() { return credit; } public void setCredit(Integer credit) { this.credit = credit; } public String getRegisterTime() { return registerTime; } public void setRegisterTime(String registerTime) { this.registerTime = registerTime == null ? null : registerTime.trim(); } public String getLoginTime() { return loginTime; } public void setLoginTime(String loginTime) { this.loginTime = loginTime == null ? null : loginTime.trim(); } public String getLoginCity() { return loginCity; } public void setLoginCity(String loginCity) { this.loginCity = loginCity == null ? null : loginCity.trim(); } public String getLogoutTime() { return logoutTime; } public void setLogoutTime(String logoutTime) { this.logoutTime = logoutTime == null ? null : logoutTime.trim(); } public String getChatId() { return chatId; } public void setChatId(String chatId) { this.chatId = chatId == null ? null : chatId.trim(); } public Integer getIsAuthentication() { return isAuthentication; } public void setIsAuthentication(Integer isAuthentication) { this.isAuthentication = isAuthentication; } public Integer getStatus() { return status; } public void setStatus(Integer status) { this.status = status; } }
*Example.java
example類的使用方法請戳:http://www.cnblogs.com/liuzunli/articles/9257949.html
public class TUserExample { protected String orderByClause; protected boolean distinct; protected List<Criteria> oredCriteria; public TUserExample() { oredCriteria = new ArrayList<Criteria>(); } public void setOrderByClause(String orderByClause) { this.orderByClause = orderByClause; } public String getOrderByClause() { return orderByClause; } public void setDistinct(boolean distinct) { this.distinct = distinct; } public boolean isDistinct() { return distinct; } public List<Criteria> getOredCriteria() { return oredCriteria; } public void or(Criteria criteria) { oredCriteria.add(criteria); } public Criteria or() { Criteria criteria = createCriteriaInternal(); oredCriteria.add(criteria); return criteria; } public Criteria createCriteria() { Criteria criteria = createCriteriaInternal(); if (oredCriteria.size() == 0) { oredCriteria.add(criteria); } return criteria; } protected Criteria createCriteriaInternal() { Criteria criteria = new Criteria(); return criteria; } public void clear() { oredCriteria.clear(); orderByClause = null; distinct = false; } protected abstract static class GeneratedCriteria { protected List<Criterion> criteria; protected GeneratedCriteria() { super(); criteria = new ArrayList<Criterion>(); } public boolean isValid() { return criteria.size() > 0; } public List<Criterion> getAllCriteria() { return criteria; } public List<Criterion> getCriteria() { return criteria; } protected void addCriterion(String condition) { if (condition == null) { throw new RuntimeException("Value for condition cannot be null"); } criteria.add(new Criterion(condition)); } protected void addCriterion(String condition, Object value, String property) { if (value == null) { throw new RuntimeException("Value for " + property + " cannot be null"); } criteria.add(new Criterion(condition, value)); } protected void addCriterion(String condition, Object value1, Object value2, String property) { if (value1 == null || value2 == null) { throw new RuntimeException("Between values for " + property + " cannot be null"); } criteria.add(new Criterion(condition, value1, value2)); } public Criteria andIdIsNull() { addCriterion("id is null"); return (Criteria) this; } public Criteria andIdIsNotNull() { addCriterion("id is not null"); return (Criteria) this; } public Criteria andIdEqualTo(Integer value) { addCriterion("id =", value, "id"); return (Criteria) this; } public Criteria andIdNotEqualTo(Integer value) { addCriterion("id <>", value, "id"); return (Criteria) this; } public Criteria andIdGreaterThan(Integer value) { addCriterion("id >", value, "id"); return (Criteria) this; } public Criteria andIdGreaterThanOrEqualTo(Integer value) { addCriterion("id >=", value, "id"); return (Criteria) this; } public Criteria andIdLessThan(Integer value) { addCriterion("id <", value, "id"); return (Criteria) this; } public Criteria andIdLessThanOrEqualTo(Integer value) { addCriterion("id <=", value, "id"); return (Criteria) this; } public Criteria andIdIn(List<Integer> values) { addCriterion("id in", values, "id"); return (Criteria) this; } public Criteria andIdNotIn(List<Integer> values) { addCriterion("id not in", values, "id"); return (Criteria) this; } public Criteria andIdBetween(Integer value1, Integer value2) { addCriterion("id between", value1, value2, "id"); return (Criteria) this; } public Criteria andIdNotBetween(Integer value1, Integer value2) { addCriterion("id not between", value1, value2, "id"); return (Criteria) this; } public Criteria andUsernameIsNull() { addCriterion("username is null"); return (Criteria) this; } public Criteria andUsernameIsNotNull() { addCriterion("username is not null"); return (Criteria) this; } public Criteria andUsernameEqualTo(String value) { addCriterion("username =", value, "username"); return (Criteria) this; } public Criteria andUsernameNotEqualTo(String value) { addCriterion("username <>", value, "username"); return (Criteria) this; } public Criteria andUsernameGreaterThan(String value) { addCriterion("username >", value, "username"); return (Criteria) this; } public Criteria andUsernameGreaterThanOrEqualTo(String value) { addCriterion("username >=", value, "username"); return (Criteria) this; } public Criteria andUsernameLessThan(String value) { addCriterion("username <", value, "username"); return (Criteria) this; } public Criteria andUsernameLessThanOrEqualTo(String value) { addCriterion("username <=", value, "username"); return (Criteria) this; } public Criteria andUsernameLike(String value) { addCriterion("username like", value, "username"); return (Criteria) this; } public Criteria andUsernameNotLike(String value) { addCriterion("username not like", value, "username"); return (Criteria) this; } public Criteria andUsernameIn(List<String> values) { addCriterion("username in", values, "username"); return (Criteria) this; } public Criteria andUsernameNotIn(List<String> values) { addCriterion("username not in", values, "username"); return (Criteria) this; } public Criteria andUsernameBetween(String value1, String value2) { addCriterion("username between", value1, value2, "username"); return (Criteria) this; } public Criteria andUsernameNotBetween(String value1, String value2) { addCriterion("username not between", value1, value2, "username"); return (Criteria) this; } public Criteria andPasswordIsNull() { addCriterion("password is null"); return (Criteria) this; } public Criteria andPasswordIsNotNull() { addCriterion("password is not null"); return (Criteria) this; } public Criteria andPasswordEqualTo(String value) { addCriterion("password =", value, "password"); return (Criteria) this; } public Criteria andPasswordNotEqualTo(String value) { addCriterion("password <>", value, "password"); return (Criteria) this; } public Criteria andPasswordGreaterThan(String value) { addCriterion("password >", value, "password"); return (Criteria) this; } public Criteria andPasswordGreaterThanOrEqualTo(String value) { addCriterion("password >=", value, "password"); return (Criteria) this; } public Criteria andPasswordLessThan(String value) { addCriterion("password <", value, "password"); return (Criteria) this; } public Criteria andPasswordLessThanOrEqualTo(String value) { addCriterion("password <=", value, "password"); return (Criteria) this; } public Criteria andPasswordLike(String value) { addCriterion("password like", value, "password"); return (Criteria) this; } public Criteria andPasswordNotLike(String value) { addCriterion("password not like", value, "password"); return (Criteria) this; } public Criteria andPasswordIn(List<String> values) { addCriterion("password in", values, "password"); return (Criteria) this; } public Criteria andPasswordNotIn(List<String> values) { addCriterion("password not in", values, "password"); return (Criteria) this; } public Criteria andPasswordBetween(String value1, String value2) { addCriterion("password between", value1, value2, "password"); return (Criteria) this; } public Criteria andPasswordNotBetween(String value1, String value2) { addCriterion("password not between", value1, value2, "password"); return (Criteria) this; } public Criteria andPhoneIsNull() { addCriterion("phone is null"); return (Criteria) this; } public Criteria andPhoneIsNotNull() { addCriterion("phone is not null"); return (Criteria) this; } public Criteria andPhoneEqualTo(String value) { addCriterion("phone =", value, "phone"); return (Criteria) this; } public Criteria andPhoneNotEqualTo(String value) { addCriterion("phone <>", value, "phone"); return (Criteria) this; } public Criteria andPhoneGreaterThan(String value) { addCriterion("phone >", value, "phone"); return (Criteria) this; } public Criteria andPhoneGreaterThanOrEqualTo(String value) { addCriterion("phone >=", value, "phone"); return (Criteria) this; } public Criteria andPhoneLessThan(String value) { addCriterion("phone <", value, "phone"); return (Criteria) this; } public Criteria andPhoneLessThanOrEqualTo(String value) { addCriterion("phone <=", value, "phone"); return (Criteria) this; } public Criteria andPhoneLike(String value) { addCriterion("phone like", value, "phone"); return (Criteria) this; } public Criteria andPhoneNotLike(String value) { addCriterion("phone not like", value, "phone"); return (Criteria) this; } public Criteria andPhoneIn(List<String> values) { addCriterion("phone in", values, "phone"); return (Criteria) this; } public Criteria andPhoneNotIn(List<String> values) { addCriterion("phone not in", values, "phone"); return (Criteria) this; } public Criteria andPhoneBetween(String value1, String value2) { addCriterion("phone between", value1, value2, "phone"); return (Criteria) this; } public Criteria andPhoneNotBetween(String value1, String value2) { addCriterion("phone not between", value1, value2, "phone"); return (Criteria) this; } public Criteria andEamilIsNull() { addCriterion("eamil is null"); return (Criteria) this; } public Criteria andEamilIsNotNull() { addCriterion("eamil is not null"); return (Criteria) this; } public Criteria andEamilEqualTo(String value) { addCriterion("eamil =", value, "eamil"); return (Criteria) this; } public Criteria andEamilNotEqualTo(String value) { addCriterion("eamil <>", value, "eamil"); return (Criteria) this; } public Criteria andEamilGreaterThan(String value) { addCriterion("eamil >", value, "eamil"); return (Criteria) this; } public Criteria andEamilGreaterThanOrEqualTo(String value) { addCriterion("eamil >=", value, "eamil"); return (Criteria) this; } public Criteria andEamilLessThan(String value) { addCriterion("eamil <", value, "eamil"); return (Criteria) this; } public Criteria andEamilLessThanOrEqualTo(String value) { addCriterion("eamil <=", value, "eamil"); return (Criteria) this; } public Criteria andEamilLike(String value) { addCriterion("eamil like", value, "eamil"); return (Criteria) this; } public Criteria andEamilNotLike(String value) { addCriterion("eamil not like", value, "eamil"); return (Criteria) this; } public Criteria andEamilIn(List<String> values) { addCriterion("eamil in", values, "eamil"); return (Criteria) this; } public Criteria andEamilNotIn(List<String> values) { addCriterion("eamil not in", values, "eamil"); return (Criteria) this; } public Criteria andEamilBetween(String value1, String value2) { addCriterion("eamil between", value1, value2, "eamil"); return (Criteria) this; } public Criteria andEamilNotBetween(String value1, String value2) { addCriterion("eamil not between", value1, value2, "eamil"); return (Criteria) this; } public Criteria andCreditIsNull() { addCriterion("credit is null"); return (Criteria) this; } public Criteria andCreditIsNotNull() { addCriterion("credit is not null"); return (Criteria) this; } public Criteria andCreditEqualTo(Integer value) { addCriterion("credit =", value, "credit"); return (Criteria) this; } public Criteria andCreditNotEqualTo(Integer value) { addCriterion("credit <>", value, "credit"); return (Criteria) this; } public Criteria andCreditGreaterThan(Integer value) { addCriterion("credit >", value, "credit"); return (Criteria) this; } public Criteria andCreditGreaterThanOrEqualTo(Integer value) { addCriterion("credit >=", value, "credit"); return (Criteria) this; } public Criteria andCreditLessThan(Integer value) { addCriterion("credit <", value, "credit"); return (Criteria) this; } public Criteria andCreditLessThanOrEqualTo(Integer value) { addCriterion("credit <=", value, "credit"); return (Criteria) this; } public Criteria andCreditIn(List<Integer> values) { addCriterion("credit in", values, "credit"); return (Criteria) this; } public Criteria andCreditNotIn(List<Integer> values) { addCriterion("credit not in", values, "credit"); return (Criteria) this; } public Criteria andCreditBetween(Integer value1, Integer value2) { addCriterion("credit between", value1, value2, "credit"); return (Criteria) this; } public Criteria andCreditNotBetween(Integer value1, Integer value2) { addCriterion("credit not between", value1, value2, "credit"); return (Criteria) this; } public Criteria andRegisterTimeIsNull() { addCriterion("register_time is null"); return (Criteria) this; } public Criteria andRegisterTimeIsNotNull() { addCriterion("register_time is not null"); return (Criteria) this; } public Criteria andRegisterTimeEqualTo(String value) { addCriterion("register_time =", value, "registerTime"); return (Criteria) this; } public Criteria andRegisterTimeNotEqualTo(String value) { addCriterion("register_time <>", value, "registerTime"); return (Criteria) this; } public Criteria andRegisterTimeGreaterThan(String value) { addCriterion("register_time >", value, "registerTime"); return (Criteria) this; } public Criteria andRegisterTimeGreaterThanOrEqualTo(String value) { addCriterion("register_time >=", value, "registerTime"); return (Criteria) this; } public Criteria andRegisterTimeLessThan(String value) { addCriterion("register_time <", value, "registerTime"); return (Criteria) this; } public Criteria andRegisterTimeLessThanOrEqualTo(String value) { addCriterion("register_time <=", value, "registerTime"); return (Criteria) this; } public Criteria andRegisterTimeLike(String value) { addCriterion("register_time like", value, "registerTime"); return (Criteria) this; } public Criteria andRegisterTimeNotLike(String value) { addCriterion("register_time not like", value, "registerTime"); return (Criteria) this; } public Criteria andRegisterTimeIn(List<String> values) { addCriterion("register_time in", values, "registerTime"); return (Criteria) this; } public Criteria andRegisterTimeNotIn(List<String> values) { addCriterion("register_time not in", values, "registerTime"); return (Criteria) this; } public Criteria andRegisterTimeBetween(String value1, String value2) { addCriterion("register_time between", value1, value2, "registerTime"); return (Criteria) this; } public Criteria andRegisterTimeNotBetween(String value1, String value2) { addCriterion("register_time not between", value1, value2, "registerTime"); return (Criteria) this; } public Criteria andLoginTimeIsNull() { addCriterion("login_time is null"); return (Criteria) this; } public Criteria andLoginTimeIsNotNull() { addCriterion("login_time is not null"); return (Criteria) this; } public Criteria andLoginTimeEqualTo(String value) { addCriterion("login_time =", value, "loginTime"); return (Criteria) this; } public Criteria andLoginTimeNotEqualTo(String value) { addCriterion("login_time <>", value, "loginTime"); return (Criteria) this; } public Criteria andLoginTimeGreaterThan(String value) { addCriterion("login_time >", value, "loginTime"); return (Criteria) this; } public Criteria andLoginTimeGreaterThanOrEqualTo(String value) { addCriterion("login_time >=", value, "loginTime"); return (Criteria) this; } public Criteria andLoginTimeLessThan(String value) { addCriterion("login_time <", value, "loginTime"); return (Criteria) this; } public Criteria andLoginTimeLessThanOrEqualTo(String value) { addCriterion("login_time <=", value, "loginTime"); return (Criteria) this; } public Criteria andLoginTimeLike(String value) { addCriterion("login_time like", value, "loginTime"); return (Criteria) this; } public Criteria andLoginTimeNotLike(String value) { addCriterion("login_time not like", value, "loginTime"); return (Criteria) this; } public Criteria andLoginTimeIn(List<String> values) { addCriterion("login_time in", values, "loginTime"); return (Criteria) this; } public Criteria andLoginTimeNotIn(List<String> values) { addCriterion("login_time not in", values, "loginTime"); return (Criteria) this; } public Criteria andLoginTimeBetween(String value1, String value2) { addCriterion("login_time between", value1, value2, "loginTime"); return (Criteria) this; } public Criteria andLoginTimeNotBetween(String value1, String value2) { addCriterion("login_time not between", value1, value2, "loginTime"); return (Criteria) this; } public Criteria andLoginCityIsNull() { addCriterion("login_city is null"); return (Criteria) this; } public Criteria andLoginCityIsNotNull() { addCriterion("login_city is not null"); return (Criteria) this; } public Criteria andLoginCityEqualTo(String value) { addCriterion("login_city =", value, "loginCity"); return (Criteria) this; } public Criteria andLoginCityNotEqualTo(String value) { addCriterion("login_city <>", value, "loginCity"); return (Criteria) this; } public Criteria andLoginCityGreaterThan(String value) { addCriterion("login_city >", value, "loginCity"); return (Criteria) this; } public Criteria andLoginCityGreaterThanOrEqualTo(String value) { addCriterion("login_city >=", value, "loginCity"); return (Criteria) this; } public Criteria andLoginCityLessThan(String value) { addCriterion("login_city <", value, "loginCity"); return (Criteria) this; } public Criteria andLoginCityLessThanOrEqualTo(String value) { addCriterion("login_city <=", value, "loginCity"); return (Criteria) this; } public Criteria andLoginCityLike(String value) { addCriterion("login_city like", value, "loginCity"); return (Criteria) this; } public Criteria andLoginCityNotLike(String value) { addCriterion("login_city not like", value, "loginCity"); return (Criteria) this; } public Criteria andLoginCityIn(List<String> values) { addCriterion("login_city in", values, "loginCity"); return (Criteria) this; } public Criteria andLoginCityNotIn(List<String> values) { addCriterion("login_city not in", values, "loginCity"); return (Criteria) this; } public Criteria andLoginCityBetween(String value1, String value2) { addCriterion("login_city between", value1, value2, "loginCity"); return (Criteria) this; } public Criteria andLoginCityNotBetween(String value1, String value2) { addCriterion("login_city not between", value1, value2, "loginCity"); return (Criteria) this; } public Criteria andLogoutTimeIsNull() { addCriterion("logout_time is null"); return (Criteria) this; } public Criteria andLogoutTimeIsNotNull() { addCriterion("logout_time is not null"); return (Criteria) this; } public Criteria andLogoutTimeEqualTo(String value) { addCriterion("logout_time =", value, "logoutTime"); return (Criteria) this; } public Criteria andLogoutTimeNotEqualTo(String value) { addCriterion("logout_time <>", value, "logoutTime"); return (Criteria) this; } public Criteria andLogoutTimeGreaterThan(String value) { addCriterion("logout_time >", value, "logoutTime"); return (Criteria) this; } public Criteria andLogoutTimeGreaterThanOrEqualTo(String value) { addCriterion("logout_time >=", value, "logoutTime"); return (Criteria) this; } public Criteria andLogoutTimeLessThan(String value) { addCriterion("logout_time <", value, "logoutTime"); return (Criteria) this; } public Criteria andLogoutTimeLessThanOrEqualTo(String value) { addCriterion("logout_time <=", value, "logoutTime"); return (Criteria) this; } public Criteria andLogoutTimeLike(String value) { addCriterion("logout_time like", value, "logoutTime"); return (Criteria) this; } public Criteria andLogoutTimeNotLike(String value) { addCriterion("logout_time not like", value, "logoutTime"); return (Criteria) this; } public Criteria andLogoutTimeIn(List<String> values) { addCriterion("logout_time in", values, "logoutTime"); return (Criteria) this; } public Criteria andLogoutTimeNotIn(List<String> values) { addCriterion("logout_time not in", values, "logoutTime"); return (Criteria) this; } public Criteria andLogoutTimeBetween(String value1, String value2) { addCriterion("logout_time between", value1, value2, "logoutTime"); return (Criteria) this; } public Criteria andLogoutTimeNotBetween(String value1, String value2) { addCriterion("logout_time not between", value1, value2, "logoutTime"); return (Criteria) this; } public Criteria andChatIdIsNull() { addCriterion("chat_id is null"); return (Criteria) this; } public Criteria andChatIdIsNotNull() { addCriterion("chat_id is not null"); return (Criteria) this; } public Criteria andChatIdEqualTo(String value) { addCriterion("chat_id =", value, "chatId"); return (Criteria) this; } public Criteria andChatIdNotEqualTo(String value) { addCriterion("chat_id <>", value, "chatId"); return (Criteria) this; } public Criteria andChatIdGreaterThan(String value) { addCriterion("chat_id >", value, "chatId"); return (Criteria) this; } public Criteria andChatIdGreaterThanOrEqualTo(String value) { addCriterion("chat_id >=", value, "chatId"); return (Criteria) this; } public Criteria andChatIdLessThan(String value) { addCriterion("chat_id <", value, "chatId"); return (Criteria) this; } public Criteria andChatIdLessThanOrEqualTo(String value) { addCriterion("chat_id <=", value, "chatId"); return (Criteria) this; } public Criteria andChatIdLike(String value) { addCriterion("chat_id like", value, "chatId"); return (Criteria) this; } public Criteria andChatIdNotLike(String value) { addCriterion("chat_id not like", value, "chatId"); return (Criteria) this; } public Criteria andChatIdIn(List<String> values) { addCriterion("chat_id in", values, "chatId"); return (Criteria) this; } public Criteria andChatIdNotIn(List<String> values) { addCriterion("chat_id not in", values, "chatId"); return (Criteria) this; } public Criteria andChatIdBetween(String value1, String value2) { addCriterion("chat_id between", value1, value2, "chatId"); return (Criteria) this; } public Criteria andChatIdNotBetween(String value1, String value2) { addCriterion("chat_id not between", value1, value2, "chatId"); return (Criteria) this; } public Criteria andIsAuthenticationIsNull() { addCriterion("is_authentication is null"); return (Criteria) this; } public Criteria andIsAuthenticationIsNotNull() { addCriterion("is_authentication is not null"); return (Criteria) this; } public Criteria andIsAuthenticationEqualTo(Integer value) { addCriterion("is_authentication =", value, "isAuthentication"); return (Criteria) this; } public Criteria andIsAuthenticationNotEqualTo(Integer value) { addCriterion("is_authentication <>", value, "isAuthentication"); return (Criteria) this; } public Criteria andIsAuthenticationGreaterThan(Integer value) { addCriterion("is_authentication >", value, "isAuthentication"); return (Criteria) this; } public Criteria andIsAuthenticationGreaterThanOrEqualTo(Integer value) { addCriterion("is_authentication >=", value, "isAuthentication"); return (Criteria) this; } public Criteria andIsAuthenticationLessThan(Integer value) { addCriterion("is_authentication <", value, "isAuthentication"); return (Criteria) this; } public Criteria andIsAuthenticationLessThanOrEqualTo(Integer value) { addCriterion("is_authentication <=", value, "isAuthentication"); return (Criteria) this; } public Criteria andIsAuthenticationIn(List<Integer> values) { addCriterion("is_authentication in", values, "isAuthentication"); return (Criteria) this; } public Criteria andIsAuthenticationNotIn(List<Integer> values) { addCriterion("is_authentication not in", values, "isAuthentication"); return (Criteria) this; } public Criteria andIsAuthenticationBetween(Integer value1, Integer value2) { addCriterion("is_authentication between", value1, value2, "isAuthentication"); return (Criteria) this; } public Criteria andIsAuthenticationNotBetween(Integer value1, Integer value2) { addCriterion("is_authentication not between", value1, value2, "isAuthentication"); return (Criteria) this; } public Criteria andStatusIsNull() { addCriterion("status is null"); return (Criteria) this; } public Criteria andStatusIsNotNull() { addCriterion("status is not null"); return (Criteria) this; } public Criteria andStatusEqualTo(Integer value) { addCriterion("status =", value, "status"); return (Criteria) this; } public Criteria andStatusNotEqualTo(Integer value) { addCriterion("status <>", value, "status"); return (Criteria) this; } public Criteria andStatusGreaterThan(Integer value) { addCriterion("status >", value, "status"); return (Criteria) this; } public Criteria andStatusGreaterThanOrEqualTo(Integer value) { addCriterion("status >=", value, "status"); return (Criteria) this; } public Criteria andStatusLessThan(Integer value) { addCriterion("status <", value, "status"); return (Criteria) this; } public Criteria andStatusLessThanOrEqualTo(Integer value) { addCriterion("status <=", value, "status"); return (Criteria) this; } public Criteria andStatusIn(List<Integer> values) { addCriterion("status in", values, "status"); return (Criteria) this; } public Criteria andStatusNotIn(List<Integer> values) { addCriterion("status not in", values, "status"); return (Criteria) this; } public Criteria andStatusBetween(Integer value1, Integer value2) { addCriterion("status between", value1, value2, "status"); return (Criteria) this; } public Criteria andStatusNotBetween(Integer value1, Integer value2) { addCriterion("status not between", value1, value2, "status"); return (Criteria) this; } } public static class Criteria extends GeneratedCriteria { protected Criteria() { super(); } } public static class Criterion { private String condition; private Object value; private Object secondValue; private boolean noValue; private boolean singleValue; private boolean betweenValue; private boolean listValue; private String typeHandler; public String getCondition() { return condition; } public Object getValue() { return value; } public Object getSecondValue() { return secondValue; } public boolean isNoValue() { return noValue; } public boolean isSingleValue() { return singleValue; } public boolean isBetweenValue() { return betweenValue; } public boolean isListValue() { return listValue; } public String getTypeHandler() { return typeHandler; } protected Criterion(String condition) { super(); this.condition = condition; this.typeHandler = null; this.noValue = true; } protected Criterion(String condition, Object value, String typeHandler) { super(); this.condition = condition; this.value = value; this.typeHandler = typeHandler; if (value instanceof List<?>) { this.listValue = true; } else { this.singleValue = true; } } protected Criterion(String condition, Object value) { this(condition, value, null); } protected Criterion(String condition, Object value, Object secondValue, String typeHandler) { super(); this.condition = condition; this.value = value; this.secondValue = secondValue; this.typeHandler = typeHandler; this.betweenValue = true; } protected Criterion(String condition, Object value, Object secondValue) { this(condition, value, secondValue, null); } } }
*mapper.java
public interface TUserMapper { int countByExample(TUserExample example); int deleteByExample(TUserExample example); int deleteByPrimaryKey(Integer id); int insert(TUser record); int insertSelective(TUser record); List<TUser> selectByExample(TUserExample example); TUser selectByPrimaryKey(Integer id); int updateByExampleSelective(@Param("record") TUser record, @Param("example") TUserExample example); int updateByExample(@Param("record") TUser record, @Param("example") TUserExample example); int updateByPrimaryKeySelective(TUser record); int updateByPrimaryKey(TUser record); }
*Mapper.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <mapper namespace="cn.gx.hzu.cpsh.common.mapper.TUserMapper" > <resultMap id="BaseResultMap" type="cn.gx.hzu.cpsh.common.pojo.TUser" > <id column="id" property="id" jdbcType="INTEGER" /> <result column="username" property="username" jdbcType="VARCHAR" /> <result column="password" property="password" jdbcType="VARCHAR" /> <result column="phone" property="phone" jdbcType="VARCHAR" /> <result column="eamil" property="eamil" jdbcType="VARCHAR" /> <result column="credit" property="credit" jdbcType="INTEGER" /> <result column="register_time" property="registerTime" jdbcType="VARCHAR" /> <result column="login_time" property="loginTime" jdbcType="VARCHAR" /> <result column="login_city" property="loginCity" jdbcType="VARCHAR" /> <result column="logout_time" property="logoutTime" jdbcType="VARCHAR" /> <result column="chat_id" property="chatId" jdbcType="VARCHAR" /> <result column="is_authentication" property="isAuthentication" jdbcType="INTEGER" /> <result column="status" property="status" jdbcType="INTEGER" /> </resultMap> <sql id="Example_Where_Clause" > <where > <foreach collection="oredCriteria" item="criteria" separator="or" > <if test="criteria.valid" > <trim prefix="(" suffix=")" prefixOverrides="and" > <foreach collection="criteria.criteria" item="criterion" > <choose > <when test="criterion.noValue" > and ${criterion.condition} </when> <when test="criterion.singleValue" > and ${criterion.condition} #{criterion.value} </when> <when test="criterion.betweenValue" > and ${criterion.condition} #{criterion.value} and #{criterion.secondValue} </when> <when test="criterion.listValue" > and ${criterion.condition} <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," > #{listItem} </foreach> </when> </choose> </foreach> </trim> </if> </foreach> </where> </sql> <sql id="Update_By_Example_Where_Clause" > <where > <foreach collection="example.oredCriteria" item="criteria" separator="or" > <if test="criteria.valid" > <trim prefix="(" suffix=")" prefixOverrides="and" > <foreach collection="criteria.criteria" item="criterion" > <choose > <when test="criterion.noValue" > and ${criterion.condition} </when> <when test="criterion.singleValue" > and ${criterion.condition} #{criterion.value} </when> <when test="criterion.betweenValue" > and ${criterion.condition} #{criterion.value} and #{criterion.secondValue} </when> <when test="criterion.listValue" > and ${criterion.condition} <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," > #{listItem} </foreach> </when> </choose> </foreach> </trim> </if> </foreach> </where> </sql> <sql id="Base_Column_List" > id, username, password, phone, eamil, credit, register_time, login_time, login_city, logout_time, chat_id, is_authentication, status </sql> <select id="selectByExample" resultMap="BaseResultMap" parameterType="cn.gx.hzu.cpsh.common.pojo.TUserExample" > select <if test="distinct" > distinct </if> <include refid="Base_Column_List" /> from t_user <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> <if test="orderByClause != null" > order by ${orderByClause} </if> </select> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" > select <include refid="Base_Column_List" /> from t_user where id = #{id,jdbcType=INTEGER} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" > delete from t_user where id = #{id,jdbcType=INTEGER} </delete> <delete id="deleteByExample" parameterType="cn.gx.hzu.cpsh.common.pojo.TUserExample" > delete from t_user <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> </delete> <insert id="insert" parameterType="cn.gx.hzu.cpsh.common.pojo.TUser" > insert into t_user (id, username, password, phone, eamil, credit, register_time, login_time, login_city, logout_time, chat_id, is_authentication, status) values (#{id,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}, #{phone,jdbcType=VARCHAR}, #{eamil,jdbcType=VARCHAR}, #{credit,jdbcType=INTEGER}, #{registerTime,jdbcType=VARCHAR}, #{loginTime,jdbcType=VARCHAR}, #{loginCity,jdbcType=VARCHAR}, #{logoutTime,jdbcType=VARCHAR}, #{chatId,jdbcType=VARCHAR}, #{isAuthentication,jdbcType=INTEGER}, #{status,jdbcType=INTEGER}) </insert> <insert id="insertSelective" parameterType="cn.gx.hzu.cpsh.common.pojo.TUser" > insert into t_user <trim prefix="(" suffix=")" suffixOverrides="," > <if test="id != null" > id, </if> <if test="username != null" > username, </if> <if test="password != null" > password, </if> <if test="phone != null" > phone, </if> <if test="eamil != null" > eamil, </if> <if test="credit != null" > credit, </if> <if test="registerTime != null" > register_time, </if> <if test="loginTime != null" > login_time, </if> <if test="loginCity != null" > login_city, </if> <if test="logoutTime != null" > logout_time, </if> <if test="chatId != null" > chat_id, </if> <if test="isAuthentication != null" > is_authentication, </if> <if test="status != null" > status, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="id != null" > #{id,jdbcType=INTEGER}, </if> <if test="username != null" > #{username,jdbcType=VARCHAR}, </if> <if test="password != null" > #{password,jdbcType=VARCHAR}, </if> <if test="phone != null" > #{phone,jdbcType=VARCHAR}, </if> <if test="eamil != null" > #{eamil,jdbcType=VARCHAR}, </if> <if test="credit != null" > #{credit,jdbcType=INTEGER}, </if> <if test="registerTime != null" > #{registerTime,jdbcType=VARCHAR}, </if> <if test="loginTime != null" > #{loginTime,jdbcType=VARCHAR}, </if> <if test="loginCity != null" > #{loginCity,jdbcType=VARCHAR}, </if> <if test="logoutTime != null" > #{logoutTime,jdbcType=VARCHAR}, </if> <if test="chatId != null" > #{chatId,jdbcType=VARCHAR}, </if> <if test="isAuthentication != null" > #{isAuthentication,jdbcType=INTEGER}, </if> <if test="status != null" > #{status,jdbcType=INTEGER}, </if> </trim> </insert> <select id="countByExample" parameterType="cn.gx.hzu.cpsh.common.pojo.TUserExample" resultType="java.lang.Integer" > select count(*) from t_user <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> </select> <update id="updateByExampleSelective" parameterType="map" > update t_user <set > <if test="record.id != null" > id = #{record.id,jdbcType=INTEGER}, </if> <if test="record.username != null" > username = #{record.username,jdbcType=VARCHAR}, </if> <if test="record.password != null" > password = #{record.password,jdbcType=VARCHAR}, </if> <if test="record.phone != null" > phone = #{record.phone,jdbcType=VARCHAR}, </if> <if test="record.eamil != null" > eamil = #{record.eamil,jdbcType=VARCHAR}, </if> <if test="record.credit != null" > credit = #{record.credit,jdbcType=INTEGER}, </if> <if test="record.registerTime != null" > register_time = #{record.registerTime,jdbcType=VARCHAR}, </if> <if test="record.loginTime != null" > login_time = #{record.loginTime,jdbcType=VARCHAR}, </if> <if test="record.loginCity != null" > login_city = #{record.loginCity,jdbcType=VARCHAR}, </if> <if test="record.logoutTime != null" > logout_time = #{record.logoutTime,jdbcType=VARCHAR}, </if> <if test="record.chatId != null" > chat_id = #{record.chatId,jdbcType=VARCHAR}, </if> <if test="record.isAuthentication != null" > is_authentication = #{record.isAuthentication,jdbcType=INTEGER}, </if> <if test="record.status != null" > status = #{record.status,jdbcType=INTEGER}, </if> </set> <if test="_parameter != null" > <include refid="Update_By_Example_Where_Clause" /> </if> </update> <update id="updateByExample" parameterType="map" > update t_user set id = #{record.id,jdbcType=INTEGER}, username = #{record.username,jdbcType=VARCHAR}, password = #{record.password,jdbcType=VARCHAR}, phone = #{record.phone,jdbcType=VARCHAR}, eamil = #{record.eamil,jdbcType=VARCHAR}, credit = #{record.credit,jdbcType=INTEGER}, register_time = #{record.registerTime,jdbcType=VARCHAR}, login_time = #{record.loginTime,jdbcType=VARCHAR}, login_city = #{record.loginCity,jdbcType=VARCHAR}, logout_time = #{record.logoutTime,jdbcType=VARCHAR}, chat_id = #{record.chatId,jdbcType=VARCHAR}, is_authentication = #{record.isAuthentication,jdbcType=INTEGER}, status = #{record.status,jdbcType=INTEGER} <if test="_parameter != null" > <include refid="Update_By_Example_Where_Clause" /> </if> </update> <update id="updateByPrimaryKeySelective" parameterType="cn.gx.hzu.cpsh.common.pojo.TUser" > update t_user <set > <if test="username != null" > username = #{username,jdbcType=VARCHAR}, </if> <if test="password != null" > password = #{password,jdbcType=VARCHAR}, </if> <if test="phone != null" > phone = #{phone,jdbcType=VARCHAR}, </if> <if test="eamil != null" > eamil = #{eamil,jdbcType=VARCHAR}, </if> <if test="credit != null" > credit = #{credit,jdbcType=INTEGER}, </if> <if test="registerTime != null" > register_time = #{registerTime,jdbcType=VARCHAR}, </if> <if test="loginTime != null" > login_time = #{loginTime,jdbcType=VARCHAR}, </if> <if test="loginCity != null" > login_city = #{loginCity,jdbcType=VARCHAR}, </if> <if test="logoutTime != null" > logout_time = #{logoutTime,jdbcType=VARCHAR}, </if> <if test="chatId != null" > chat_id = #{chatId,jdbcType=VARCHAR}, </if> <if test="isAuthentication != null" > is_authentication = #{isAuthentication,jdbcType=INTEGER}, </if> <if test="status != null" > status = #{status,jdbcType=INTEGER}, </if> </set> where id = #{id,jdbcType=INTEGER} </update> <update id="updateByPrimaryKey" parameterType="cn.gx.hzu.cpsh.common.pojo.TUser" > update t_user set username = #{username,jdbcType=VARCHAR}, password = #{password,jdbcType=VARCHAR}, phone = #{phone,jdbcType=VARCHAR}, eamil = #{eamil,jdbcType=VARCHAR}, credit = #{credit,jdbcType=INTEGER}, register_time = #{registerTime,jdbcType=VARCHAR}, login_time = #{loginTime,jdbcType=VARCHAR}, login_city = #{loginCity,jdbcType=VARCHAR}, logout_time = #{logoutTime,jdbcType=VARCHAR}, chat_id = #{chatId,jdbcType=VARCHAR}, is_authentication = #{isAuthentication,jdbcType=INTEGER}, status = #{status,jdbcType=INTEGER} where id = #{id,jdbcType=INTEGER} </update> </mapper>
生成好代碼以後咱們就能夠掉mapper接口的方法愉快的進行開發了,配合上pagehelpr插件,輕鬆實現分頁、排序
若是你也在用Mybatis,建議嘗試該分頁插件,這個必定是最方便使用的分頁插件。該插件目前支持Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六種數據庫分頁。
maven
<dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>3.4.2-fix</version> </dependency>
第一步:在Mybatis配置xml中配置攔截器插件:
<!-- 配置分頁插件 --> <plugins> <plugin interceptor="com.github.pagehelper.PageHelper"> <!-- 設置數據庫類型 Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六種數據庫--> <property name="dialect" value="mysql"/> </plugin> </plugins>
第二步:在代碼中使用
//分頁處理 page當前頁 rows每頁多少條記錄 PageHelper.startPage(page, rows); //緊跟着的第一個select就會被分頁 查詢回來的list大小爲rows List<TbItem> list = itemMapper.selectByExample(example); //使用PageInfo對結果集進行包裝 經過包裝後的pageinfo對象取得相關數據 PageInfo<TbItem> pageInfo = new PageInfo<>(list);
PageInfo類 定義的屬性:
//當前頁 private int pageNum; //每頁的數量 private int pageSize; //當前頁的數量 private int size; //排序 private String orderBy; //因爲startRow和endRow不經常使用,這裏說個具體的用法 //能夠在頁面中"顯示startRow到endRow 共size條數據" private int startRow; private int endRow; //當前頁面第一個元素在數據庫中的行號 private int startRow; //當前頁面最後一個元素在數據庫中的行號 private int endRow; //總記錄數 private long total; //總頁數 private int pages; //結果集 private List<T> list; //第一頁 private int firstPage; //前一頁 private int prePage; //下一頁 private int nextPage; //最後一頁 private int lastPage; //是否爲第一頁 private boolean isFirstPage = false; //是否爲最後一頁 private boolean isLastPage = false; //是否有前一頁 private boolean hasPreviousPage = false; //是否有下一頁 private boolean hasNextPage = false; //導航頁碼數 private int navigatePages; //全部導航頁號 private int[] navigatepageNums;
原理:分頁插件會自動在你的查詢語句後面添加 order by addtime DESC limit ?,?
使用原理:
pageHelper會使用ThreadLocal獲取到同一線程中的變量信息,各個線程之間的Threadlocal不會相互干擾,也就是Thread1中的ThreadLocal1以後獲取到Tread1中的變量的信息,不會獲取到Thread2中的信息
因此在多線程環境下,各個Threadlocal之間相互隔離,能夠實現,不一樣thread使用不一樣的數據源或不一樣的Thread中執行不一樣的SQL語句
因此,PageHelper利用這一點經過攔截器獲取到同一線程中的預編譯好的SQL語句以後將SQL語句包裝成具備分頁功能的SQL語句,並將其再次賦值給下一步操做,因此實際執行的SQL語句就是有了分頁功能的SQL語句
注意:
一、只有緊跟在PageHelper.startPage方法後的第一個Mybatis的查詢(Select方法)方法會被分頁。
二、分頁插件不支持帶有for update語句的分頁
三、分頁插件不支持關聯結果查詢
經測試,註解方式跟配置XML方式效果一致,傳參、調用方式、返回結果都一致,接口均能正常調用。
insert接口
update接口
select接口
delete接口
MyBatis 是一款優秀的持久層框架,它支持定製化 SQL、存儲過程以及高級映射。MyBatis 避免了幾乎全部的 JDBC 代碼和手動設置參數以及獲取結果集。MyBatis 可使用簡單的 XML 或註解來配置和映射原生信息,將接口和 Java 的 POJOs(Plain Old Java Objects,普通的 Java對象)映射成數據庫中的記錄。
當咱們一提及mybatis就會默默滴跟hibernate進行對比:
Hibernate DAO層開發比較簡單,sql語句都封裝好了,mybatis須要維護sql,手動寫
Hibernate可移植性高,更改數據庫方言便可,mybatis可移植性差,不一樣的數據庫sql不一樣
Mybatis能夠進行更細緻的sql優化,減小不必的查詢字段,而hibernate封裝太過完全
代碼已經開源、託管到個人GitHub、碼雲: