Spring 整合Mybatis Mapper动态代理方法

先看项目目录结构

很清爽了

最重要的Spring的核心配置文件,看一下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" 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 http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd">

    <context:property-placeholder location="classpath:db.properties" />
    
    <!-- 数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>
    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="typeAliasesPackage" value="com.itheima.mybatis.pojo"></property>
    </bean>
    
    <!-- 单个动态代理用下面方法 -->
<!--     <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
        <property name="mapperInterface" value="com.itheima.mybatis.mapper.UserMapper"></property>
        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
    </bean> -->
    
    <!-- Mapper动态代理批量扫面的方式，扫描后会每个代理对象的id就是接口类名（首字母小写） -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注意：从上下文找到sqlSessionFactory对象 -->
        <property name="basePackage" value="com.itheima.mybatis.mapper"></property>
    </bean>
    
    <bean id="transactionManager"    
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">    
        <property name="dataSource" ref="dataSource" />    
    </bean>  
    <tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

只要数据源和动态代理及事务就可以了

动态代理对象的名字是默认的类名首字母小写

测试类看一下使用方法

package com.itheima.mybatis.test;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.itheima.mybatis.mapper.UserMapper;

public class TestUserMapper {
private ApplicationContext ctx;
    
    @Test
    public void testQueryUserById() {
        this.ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserMapper userMapper = (UserMapper) this.ctx.getBean("userMapper");
        System.out.println(userMapper.queryUserById(1));
    }
}

使用代理对象就可以了

最后,使用的maven坐标

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.itheima.mybatis</groupId>
  <artifactId>mybatis02_spring</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>mybatis02_spring</name>
  <description>mybatis02_spring</description>
  
  <!-- mybatis单独玩的时候有的包应该有 -->
  <!-- spring相关包 -->
  <!-- mybatis与spring整合包 -->
  <!-- 数据库连接池jar包 -->
  
  <properties>
        <junit.version>4.12</junit.version>
        <log4j.version>1.2.17</log4j.version>
        <mysql.version>5.1.46</mysql.version>
        <mybatis.version>3.2.7</mybatis.version>
        <mybatis.spring.version>1.2.2</mybatis.spring.version>
        <spring.version>4.1.3.RELEASE</spring.version>
    </properties>

    <dependencies>
        <!-- junit测试包 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <!-- log4j日志包 -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

        <!--mysql依赖包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <!--mybatis依赖包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <!--Mybatis+Spring整合 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${mybatis.spring.version}</version>
        </dependency>

        <!-- 数据库连接池 -->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>

        <!-- Spring:依赖注入IoC与DI的最基本实现 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- Spring:Bean工厂与bean的装配 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- Spring:spring的context上下文即IoC容器 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <!-- Spring:jdbc的支持 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- Spring:test的支持 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
            <scope>test</scope>
        </dependency>
        <!-- spring end -->
    </dependencies>
  
</project>