spring+mybatis整合MapperScannerConfigurer批量配置.md

spring+mybatis整合MapperScannerConfigurer(批量配置,final)

一、db.properties

jdbc.JdbcUrl=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=UTF-8
jdbc.JdbcDriver=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=root

二、在resource资源文件夹下新建XML Configuration File->Spring Config、取名spring.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:context="http://www.springframework.org/schema/context" 
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans.xsd 
           http://www.springframework.org/schema/context 
           http://www.springframework.org/schema/context/spring-context.xsd 
           http://www.springframework.org/schema/tx 
           http://www.springframework.org/schema/tx/spring-tx.xsd 
           http://www.springframework.org/schema/aop 
           http://www.springframework.org/schema/aop/spring-aop.xsd">

    <context:component-scan base-package="com.edu"/>
    
    <context:property-placeholder location="db.properties"/>
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.JdbcUrl}"/>
        <property name="driverClass" value="${jdbc.JdbcDriver}"/>
        <property name="user" value="${jdbc.user}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!-- sqlsession工厂 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="typeAliasesPackage" value="com.edu.bean"/>
        <property name="mapperLocations" value="classpath:mapper/*Mapper.xml"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!--维护所有Mapper-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.edu.mapper"></property>
    </bean>
</beans> 

三、详细代码实现

• 业务层接口：

  package com.edu.service;
  
  import com.edu.bean.User;
  
  import java.util.List;
  
  public interface UserService {
      List<User> selectAll();
  }
  

• 业务层实现：

  package com.edu.service.impl;
  
  import com.edu.bean.User;
  import com.edu.mapper.UserMapper;
  import com.edu.service.UserService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  import java.util.List;
  
  @Service//业务层
  public class UserServiceImpl implements UserService {
  
      @Autowired
      private UserMapper userMapper;
  
      @Override
      public List<User> selectAll() {
          return userMapper.selectByExample(null);
      }
  }
  

四、测试

  package com.edu;

  import com.edu.bean.User;
  import com.edu.service.UserService;
  import org.junit.Test;
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.support.ClassPathXmlApplicationContext;

  import java.util.List;

  public class TestUser {
      @Test
      public void testServiceImpl(){
          ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
          UserService userService = applicationContext.getBean(UserService.class);
          List<User> list = userService.selectAll();
          System.out.println(list);
      }
  }