springboot配置數據庫鏈接池druid、整合mybatis、整合pagehelper

springboot配置數據庫鏈接池druid

druid所需pom依賴

 

<dependency>
     <groupId>com.alibaba</groupId>
     <artifactId>druid-spring-boot-starter</artifactId>
     <version>1.1.10</version>
  </dependency>

 

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aspects</artifactId>
</dependency>

application.yml配置druid

springboot默認數據源是org.apache.tomcat.jdbc.pool.DataSource

 

spring: datasource: #1.JDBC type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/mybatis_ssm?useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
 username: mybatis_ssm password: 123 druid: #2.鏈接池配置 #初始化鏈接池的鏈接數量 大小，最小，最大 initial-size: 5 min-idle: 5 max-active: 20 #配置獲取鏈接等待超時的時間 max-wait: 60000 #配置間隔多久才進行一次檢測，檢測須要關閉的空閒鏈接，單位是毫秒 time-between-eviction-runs-millis: 60000 # 配置一個鏈接在池中最小生存的時間，單位是毫秒 min-evictable-idle-time-millis: 30000 validation-query: SELECT 1 FROM DUAL test-while-idle: true test-on-borrow: true test-on-return: false # 是否緩存preparedStatement，也就是PSCache 官方建議MySQL下建議關閉 我的建議若是想用SQL防火牆 建議打開 pool-prepared-statements: true max-pool-prepared-statement-per-connection-size: 20 # 配置監控統計攔截的filters，去掉後監控界面sql沒法統計，'wall'用於防火牆 filter: stat: merge-sql: true slow-sql-millis: 5000 #3.基礎監控配置 web-stat-filter: enabled: true url-pattern: /* #設置不統計哪些URL exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*" session-stat-enable: true session-stat-max-count: 100 stat-view-servlet: enabled: true url-pattern: /druid/* reset-enable: true #設置監控頁面的登陸名和密碼 login-username: admin login-password: admin allow: 127.0.0.1 #deny: 192.168.1.100 server: port: 80 servlet: context-path: /

 

 

啓動SpringBoot項目訪問druid，  http://localhost:tomcat端口號/項目名稱/druid/

 

 

 

 

接下來寫幾個測試方法來查看URL監控

package com.psy.springboot02.controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController @RequestMapping("/demo") public class Hellocontroller { @RequestMapping("/say1") public String say1(){ return "zs說"; } @RequestMapping("/say2") public String say2(){ try { Thread.sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } return "ls說"; } @RequestMapping("/say3") public String say3(){ try { Thread.sleep(5000); } catch (InterruptedException e) { e.printStackTrace(); } return "ww說"; } }

 

 

springboot整合mybatis

 

springboot整合mybatis逆向生成插件

相關pom依賴

<!--更改springboot中的mysql版本，逆向生成不兼容高版本-->
<mysql.version>5.1.44</mysql.version>

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>${mysql.version}</version>
    <scope>runtime</scope>
</dependency>

<!--引入mybatis-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>

<resources>
    <!--解決mybatis-generator-maven-plugin運行時沒有將XxxMapper.xml文件放入target文件夾的問題-->
    <resource>
        <directory>src/main/java</directory>
        <includes>
            <include>**/*.xml</include> </includes> </resource> <!--解決mybatis-generator-maven-plugin運行時沒有將jdbc.properites文件放入target文件夾的問題--> <resource> <directory>src/main/resources</directory> <includes> <include>*.properties</include> <include>*.xml</include> <include>*.yml</include> </includes> </resource> </resources> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.2</version> <dependencies> <!--使用Mybatis-generator插件不能使用過高版本的mysql驅動 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> </dependencies> <configuration> <overwrite>true</overwrite> </configuration> </plugin>

逆向生成配置文件generatorConfig.xml

 

<?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>
    <!-- 引入配置文件 -->
    <properties resource="jdbc.properties"/>

    <!--指定數據庫jdbc驅動jar包的位置-->
    <classPathEntry location="D:\initPath\mvn_repository\mysql\mysql-connector-java\5.1.44\mysql-connector-java-5.1.44.jar"/>

    <!-- 一個數據庫一個context -->
    <context id="infoGuardian">
        <!-- 註釋 -->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/><!-- 是否取消註釋 -->
            <property name="suppressDate" value="true"/> <!-- 是否生成註釋代時間戳 -->
        </commentGenerator>

        <!-- jdbc鏈接 -->
        <jdbcConnection driverClass="${jdbc.driver}" connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>

        <!-- 類型轉換 -->
        <javaTypeResolver>
            <!-- 是否使用bigDecimal， false可自動轉化如下類型（Long, Integer, Short, etc.） -->
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!-- 01 指定javaBean生成的位置 -->
        <!-- targetPackage：指定生成的model生成所在的包名 -->
        <!-- targetProject：指定在該項目下所在的路徑  -->
        <javaModelGenerator targetPackage="com.psy.springboot02.entity" targetProject="src/main/java">
            <!-- 是否容許子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
            <!-- 是否對model添加構造函數 -->
            <property name="constructorBased" value="true"/>
            <!-- 是否針對string類型的字段在set的時候進行trim調用 -->
            <property name="trimStrings" value="false"/>
            <!-- 創建的Model對象是否 不可改變  即生成的Model對象不會有 setter方法，只有構造方法 -->
            <property name="immutable" value="false"/>
        </javaModelGenerator>

        <!-- 02 指定sql映射文件生成的位置 -->
        <sqlMapGenerator targetPackage="com.psy.springboot02.mapper" targetProject="src/main/java">
            <!-- 是否容許子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>

        <!-- 03 生成XxxMapper接口 -->
        <!-- type="ANNOTATEDMAPPER",生成Java Model 和基於註解的Mapper對象 -->
        <!-- type="MIXEDMAPPER",生成基於註解的Java Model 和相應的Mapper對象 -->
        <!-- type="XMLMAPPER",生成SQLMap XML文件和獨立的Mapper接口 -->
        <javaClientGenerator targetPackage="com.psy.springboot02.mapper" targetProject="src/main/java" type="XMLMAPPER">
            <!-- 是否在當前路徑下新加一層schema,false路徑com.oop.eksp.user.model， true:com.oop.eksp.user.model.[schemaName] -->
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>

        <!-- 配置表信息 -->
        <!-- schema即爲數據庫名 -->
        <!-- tableName爲對應的數據庫表 -->
        <!-- domainObjectName是要生成的實體類 -->
        <!-- enable*ByExample是否生成 example類 -->

        <table schema="" tableName="t_mvc_book" domainObjectName="Book" enableCountByExample="false" enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false">
            <property name="useActualColumnNames" value="true" />
        </table>


    </context>
</generatorConfiguration>

 

jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/mybatis_ssm?useUnicode=true&characterEncoding=UTF-8
jdbc.username=mybatis_ssm jdbc.password=123

逆向生成集成到maven中的命令

mybatis-generator:generate -e

 

 

使用@Repository註解，在啓動類中添加@MapperScan(「xxxx」)註解，用於掃描Mapper類的包。

@MapperScan("com.psy.springboot02.mapper")

 

 

測試:

 

springboot整合pagehelper

導入相關pom依賴

<dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.3</version>
        </dependency>

 

配置application.yml文件

#pagehelper分頁插件配置 pagehelper: helperDialect: mysql reasonable: true supportMethodsArguments: true
  params: count=countSql #顯示日誌 logging: level: com.psy.springboot02.mapper: debug

 

PagerAspect 

package com.psy.springboot02.aspect; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.psy.springboot02.uitls.PageBean; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.springframework.stereotype.Component; import java.util.List; @Component @Aspect public class PagerAspect { @Around("execution(* *..*Service.*Pager(..))") public Object invoke(ProceedingJoinPoint args) throws Throwable{ Object[] params = args.getArgs(); PageBean pageBean = null; for (Object param : params) { if(param instanceof PageBean){ pageBean = (PageBean) param; break; } } if (pageBean !=null && pageBean.isPagination()) PageHelper.startPage(pageBean.getPage(),pageBean.getRows()); Object proceed = args.proceed(params); if (pageBean !=null && pageBean.isPagination()){ PageInfo pageInfo = new PageInfo((List)proceed); pageBean.setTotal(pageInfo.getTotal()+""); } return proceed; } }

 

相關代碼：

List<Map> bookPager(Map map, PageBean pageBean);

 <select id="bookPager" resultType="java.util.Map" parameterType="java.util.Map" >
    select * from t_mvc_book <where>
      <if test="bname !=null " > and bname like concat ('%',#{bname},'%') </if>
    </where>

  </select>

 

測試代碼：

@Test public void bookPager(){ Map map=new HashMap(); map.put("bname","聖墟"); PageBean pageBean=new PageBean(); pageBean.setPage(2); List<Map> list = this.bookService.bookPager(map, pageBean); for (Map m:list) { System.out.println(m); } System.out.println(pageBean); }