Spring+MyBatis

Posted 2020-12-03 阴翳公子

spring.xml整合

SqlSessionFactoryBean组件配置
为整合应用提供SQLSession对象

MapperScannerConfigurer组件配置
根据指定的包批量的去扫描Mapper接口，生成对应的实例

如果指定某个包下并不完全是我们定义的Mapper接口，此时可以使用MapperScannerConfigurer的两个属性来缩小接口
的实例化范围，一个是使用annotationClass，一个是markInterface

二者不可以同时使用，推荐使用注解标记

<?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:jdbc="http://www.springframework.org/schema/jdbc"  
    xmlns:jee="http://www.springframework.org/schema/jee" 
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop" 
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:util="http://www.springframework.org/schema/util"
    xmlns:jpa="http://www.springframework.org/schema/data/jpa"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
        http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
        http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd" >
    
    <!-- 加载属性配置文件  -->
    <util:properties id="db" location="classpath:db.properties" />
    
    <!-- 定义数据源 -->
    <bean id="ds" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="#{db.driver}"></property>
        <property name="url" value="#{db.url}"></property>
        <property name="username" value="#{db.user}"></property>
        <property name="password" value="#{db.pwd}"></property>
    </bean>
    
    <!-- 定义SQLSessionFactoryBean组件 -->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean" >
        <!-- 没有了MyBatis的主配置文件 -->
        <!-- 需要指定连接资源 -->
        <property name="dataSource" ref="ds"></property>
        <!-- 需要指定映射文件 -->
        <property name="mapperLocations" value="classpath:com/xms/entity/mapper/*.xml"></property>
    </bean>
    
    
    <!-- 定义MapperScannerrConfigurer扫描组件 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" >
        <!-- 指定Mapper接口扫描包 -->
        <property name="basePackage" value="com.xms.dao" ></property>
        <!-- 手动指定SqlSessionFactory对象 -->  <!-- sqlSessionFactory属性可以不用指定，它会以Autowired方式自动注入 -->
        <property name="sqlSessionFactory" ref="sqlSessionFactoryBean" ></property>
    
    </bean>
    
    
    
    
    
    
    
</beans>

EmpMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"      
 "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">
 
 <mapper namespace="com.xms.dao.EmpMapper">
     <!-- 查看全部emp表记录 -->
     <select id="findAll" resultType="com.xms.entity.Emp">
         select*from emp
     </select>
     
     <!-- 按编号查看记录 -->
     <select id="findByEmpno" resultType="com.xms.entity.Emp" parameterType="java.lang.Integer">
         select*from emp where empno=#{empno}
     </select>
     
     <!-- 增加一条记录 -->
     <insert id="save" parameterType="com.xms.entity.Emp" >
         insert into emp values(#{empno},#{ename},#{salary},#{bonus},#{hiredate},#{deptno})
     </insert>
     
    <!-- 修改一条记录 -->     
     <update id="update" parameterType="com.xms.entity.Emp">
         update emp set ename=#{ename},bonus=#{bonus},hiredate=#{hiredate},deptno=#{deptno} where empno=#{empno}
     </update>
     
    <!-- 删除一条记录 -->     
     <delete id="delete" parameterType="com.xms.entity.Emp">
         delete from emp where empno=#{empno}
     </delete>
     
 </mapper>

TestCase.java

package com.xms.test;

import java.util.List;

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

import com.xms.dao.EmpMapper;
import com.xms.entity.Emp;

public class TestCase {

    ApplicationContext ac=new ClassPathXmlApplicationContext("spring.xml");//实例化容器
    EmpMapper empMapper=ac.getBean("empMapper", EmpMapper.class);//查找反射对象
    
    @Test
    public void testOne(){
        List<Emp> emps=empMapper.findAll();
        for(Emp emp:emps){
            System.out.println(emp.getEname()+":"+emp.getBonus());
        }
    }
}

EmpMapper.java

package com.xms.dao;

import java.util.List;

import com.xms.entity.Emp;

public interface EmpMapper {
    List<Emp> findAll();
    
    Emp findByEmpno(int empno);
    
    void save(Emp emp);
    
    void update(Emp emp);
    
    void delete(Emp emp);
}

jar包

spring ioc 5个 + spring jdbc 2个 + spring aop 1个 + mysql 1个 + MyBatis 2个 + DBCP 3个