spring整合mybatis — 更新完毕

1、准备工作 —— 导入依赖

  <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.12.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.5.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.2</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.6</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.6</version>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

2、编写实体类

3、编写接口、mybatis的sql语句

4、配置连接池

5、编写log4j日志

这是我这边的配置：不会编写的自行百度即可

#将等级为DEBUG的日志信息输出到console和file这两个目的地，console和file的定义在下面的代码
log4j.rootLogger=DEBUG,console,file

#控制台输出的相关设置
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
log4j.appender.console.Threshold=DEBUG
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=[%c]-%m%n

#文件输出的相关设置
log4j.appender.file = org.apache.log4j.RollingFileAppender
#这是生成日志文件的路径名字
log4j.appender.file.File=./1og/xieGongZi.log

log4j.appender.file.MaxFileSize=10mb
log4j.appender.file.Threshold=DEBUG
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=[%p][%d{yy-MM-dd}][%c]‰m%n

#日志输出级别
log4j.logger.org.mybatis=DEBUG
log4j.logger.java.sq1=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.ResultSet=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

6、编写mybatis-config.xml配置文件

7、编写Spring的配置文件 spring-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
            https://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/aop
            https://www.springframework.org/schema/aop/spring-aop.xsd
            http://www.springframework.org/schema/context
            https://www.springframework.org/schema/context/spring-context.xsd
            http://www.springframework.org/schema/tx
            https://www.springframework.org/schema/tx/spring-tx.xsd
        ">

<!-- 从连接池读取数据源  -->
    <!-- 下面这种是使用druid来读取 也是推荐的一种 -->
    <context:property-placeholder location="classpath:druid.properties"/>
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${druid.driverClassName}"/>
        <property name="url" value="${druid.url}"/>
        <property name="username" value="${druid.username}"/>
        <property name="password" value="${druid.password}"/>
    </bean>

    <!--  还有一种读取数据源的配置  就是：利用spring-jdbc自带的  当然也有jdbc....-->
<!--    <bean id="dataSource2" class="org.springframework.jdbc.datasource.DriverManagerDataSource">-->
<!--        <property name="driverClassName" value="${druid.driverClassName}"/>-->
<!--        <property name="url" value="${druid.url}"/>-->
<!--        <property name="username" value="${druid.username}"/>-->
<!--        <property name="password" value="${druid.password}"/>-->
<!--    </bean>-->

    <!--  加载SQLSessionFactory   联想mybatis获取SqlSession  -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>

        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
    </bean>

    <!--  把事务进行托管到这个spring容器中来  -->
    <!--  声明事务托管  -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--  编写哪些方法需要进行托管  -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="*" rollback-for="Exception"/>
        </tx:attributes>
    </tx:advice>
    <!-- 编写切面 -->
    <aop:config>
        <!-- 切点 -->
        <aop:pointcut id="pointCut" expression="execution( * cn.xiegongzi.mapper.*.*(..) )"/>
        <!-- 组装切面 -->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pointCut"/>
    </aop:config>

    <!--
          后面的步骤了解即可，实际开发不会这么用，到时ssm整合会使用另外的方式：自动装配 —— 扫描包
          从sqlSessionFactory获取SqLSession
          SqlSessionTemplate 就是sqlSession
          注：SqlSessionTemplate底层没有set方法，因此：这里需要通过构造器来注入
    -->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg index="0" ref="sqlSessionFactory"/>
    </bean>

    <!--  把实现类托管到spring中来  -->
    <bean id="userMapper" class="cn.xiegongzi.mapper.impl.UserMapperImpl">
        <property name="sqlSession" ref="sqlSession"/>
    </bean>

</beans>

• 实现类的编写
  
  

package cn.xieGongZi.mapper.impl;

import cn.xieGongZi.entity.User;
import cn.xieGongZi.mapper.IUserMapper;
import org.mybatis.spring.SqlSessionTemplate;

import java.util.List;

public class UserMapperImpl implements IUserMapper {

    // SqlSessionTemplate 这个其实就是SQLSession
    private SqlSessionTemplate sqlSession;

    public void setSqlSession(SqlSessionTemplate sqlSession) {
        this.sqlSession = sqlSession;
    }

    @Override
    public List<User> selectAllUser() {

        IUserMapper mapper = sqlSession.getMapper(IUserMapper.class);
        return mapper.selectAllUser();
    }
}

8、测试

9、补充：实现类还可以这么玩 —— 但是：这种方式让类失去了继承能力，因此：看情况使用

测试：