一直用ssm在開發項目,以前都是直接copy別人的項目,今天趁着項目剛剛交付,本身搭建一下ssm環境,作個記錄html
1、建立項目、引入jar包,由於版本不同,就不貼出這部分的內容了。我的平時的習慣是,先將核心jar包引入,在測試是若是有須要添加的,在額外加入,一堆jar包也不太好記。java
2、首先項目中配置springmysql
一、項目web.xml中配置web
<listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 經過上下文參數指定spring配置文件的位置 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param>
二、構建項目結構以下圖(代碼見下方):spring
2.1實體類Usersql
public class User { private int id; private String name; private int age; //getters、setters }
2.2 UserDao 對實體類的操做,其中的方法名稱和Mapper中對應的id同樣json
public interface UserDao { public List<User> findAll(); public User findById(int id); public void addUser(User u); public void deleteUser(int id); public void updateUser(User u); }
2.3 UserMapper.xml,其中就是對應dao層的具體操做,包括其中的sql語句,相似與其中接口的實現,只不過這個實現是mybatis本身去實現的瀏覽器
<?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中的namespace用於綁定Dao接口的,mybatis爲映射文件定義了一個代理接口,之後所有經過這個接口來和映射文件交互,而再也不是使用之前方法 --> <mapper namespace="com.ssm.dao.UserDao"> <!-- 查找 --> <select id="findAll" resultType="user"> select * from user </select> <!-- 根據主鍵查找 --> <select id="findById" parameterType="int" resultType="user"> select * from user where id = #{id} </select> <!-- useGeneratedKeys="true" keyProperty="id" 用戶獲取添加後的主鍵 --> <insert id="addUser" parameterType="user" useGeneratedKeys="true" keyProperty="id"> insert into user values (#{id},#{name},#{age}) </insert> <!-- 刪除 --> <delete id="deleteUser" parameterType="int"> delete from user where id = #{id} </delete> <!-- 修改 --> <update id="updateUser" parameterType="user"> update user set name = #{name},age= #{age} where id = #{id} </update> </mapper>
2.4 userService,用戶的業務操做,注意這裏userDao接口,mybatis MapperScannerConfigurer生成代理注入到Spring(spring文件中),因此咱們沒有不須要爲dao層添加註解@Repository進行注入spring-mvc
@Service public class UserService { @Resource private UserDao userDao; public List<User> findAll() { return userDao.findAll(); } public User findById(int qid) { return userDao.findById(qid); } public void addUser(User u) { userDao.addUser(u); } public void deleteUser(int id) { userDao.deleteUser(id); } public void updateUser(User u) { userDao.updateUser(u); } }
2.5 applicationContext.xml文件中,主要是sqlSessionFactory和事物的配置,裏邊有詳細的配置註釋,這裏再也不贅述mybatis
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd "> <!-- 註解驅動 --> <mvc:annotation-driven /> <!-- 組件掃描 --> <context:component-scan base-package="com.ssm"></context:component-scan> <!-- 定義數據源 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="com.mysql.jdbc.Driver" /> <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ssm" /> <property name="user" value="root" /> <property name="password" value="root" /> <property name="initialPoolSize" value="10" /> <property name="maxPoolSize" value="50" /> <property name="minPoolSize" value="10" /> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="configLocation" value="classpath:mybatis-config.xml" /> <property name="dataSource" ref="dataSource"></property> <property name="mapperLocations" value="classpath:com/ssm/mapper/*.xml"></property> </bean> <!-- mybatis MapperScannerConfigurer 自動掃描 將Mapper接口生成代理注入到Spring --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.ssm.dao" /> <!--沒有必要去指定SqlSessionFactory或SqlSessionTemplate, 由於MapperScannerConfigurer將會建立 MapperFactoryBean,以後自動裝配。 可是,若是你使 用了一個以上的DataSource,那 麼自動裝配可能會失效。 這種狀況下,你可使用sqlSessionFactoryBeanName或sqlSessionTemplateBeanName 屬性來設置正確的 bean名稱來使用。 --> <!-- <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> --> </bean> <!-- 事務管理器 --> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 配置事物的傳播特性 (事物通知) --> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="save*" propagation="REQUIRED" /> <tx:method name="delete*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="find*" read-only="true" /> <tx:method name="*" read-only="true" /> </tx:attributes> </tx:advice> <aop:config> <aop:advisor pointcut="execution(* com.area.service.*.*(..))" advice-ref="txAdvice" /> </aop:config> </beans>
2.6 mybatis的配置文件,這個主要是對全局的配置進行一個設置
<?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"> <configuration> <settings> <setting name="cacheEnabled" value="true" /> </settings> <typeAliases> <typeAlias alias="user" type="com.ssm.pojo.User" /> </typeAliases> </configuration>
2.7 測試類:
public class TestSSM { private static ApplicationContext act; private static SqlSessionFactory sqlSessionFactory; private static SqlSession sqlSession; @BeforeClass public static void before() throws IOException { act = new ClassPathXmlApplicationContext("applicationContext.xml"); sqlSessionFactory = (SqlSessionFactory) act .getBean("sqlSessionFactory"); sqlSession = sqlSessionFactory.openSession(); } @Test public void testFindAll() { UserService userService = (UserService) act.getBean("userService"); List<User> list = userService.findAll(); for (User u : list) { System.out.println(u.toString()); } } @Test public void testFindById() { UserService userService = (UserService) act.getBean("userService"); User u = userService.findById(3); System.out.println(u); } @Test public void testDeleteUser() { UserService userService = (UserService) act.getBean("userService"); userService.deleteUser(3);; } @Test public void testAddUser() { UserService userService = (UserService) act.getBean("userService"); User u = new User(); u.setName("123"); u.setAge(33); userService.addUser(u); } @Test public void testUpdateUser() { UserService userService = (UserService) act.getBean("userService"); User u = new User(); u.setName("123"); u.setAge(33); u.setId(2); userService.updateUser(u); } @AfterClass public static void after() throws IOException { sqlSession.close(); } }
各個測試方法均測試經過,說明咱們的spring + mybatis環境整合成功。
3、整合springmvc或者struts(這裏介紹springmvc)
一、web.xml中配置springmvc
<servlet> <servlet-name>SpringMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>SpringMVC</servlet-name> <!-- 此處能夠能夠配置成*.do,對應struts的後綴習慣 --> <url-pattern>*.do</url-pattern> </servlet-mapping>
2. springmvc.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <!-- 自動掃描該包,使SpringMVC認爲包下用了@controller註解的類是控制器 --> <context:component-scan base-package="com.area.controller" /> <!--避免IE執行AJAX時,返回JSON出現下載文件 --> <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> </list> </property> </bean> <!-- 啓動SpringMVC的註解功能,完成請求和註解POJO的映射 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON轉換器 --> </list> </property> </bean> <!-- 定義跳轉的文件的先後綴 ,視圖模式配置 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 這裏的配置個人理解是自動給後面action的方法return的字符串加上前綴和後綴,變成一個 可用的url地址 --> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> <!-- 配置文件上傳,若是沒有使用文件上傳能夠不用配置,固然若是不配,那麼配置文件中也沒必要引入上傳組件包 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 默認編碼 --> <property name="defaultEncoding" value="utf-8" /> <!-- 文件大小最大值 --> <property name="maxUploadSize" value="10485760000" /> <!-- 內存中的最大值 --> <property name="maxInMemorySize" value="40960" /> </bean> </beans>
3. 編寫controller層
@Controller public class UserController { @Resource private UserService userService; @RequestMapping("/test") public void test() { List<User> list = userService.findAll(); for (User u : list) { System.out.println(u); } } }
經過瀏覽器測試:
OK,一切正常!ssm框架整合成功!