详解Spring与Mybatis的整合方法（基于Eclipse的搭建）

项目工程总览：

在这里插入图片描述

项目路径建的包不是唯一，只要之后配置的路径映射正确即可

Emp.java

 <properties>
    <spring.version>5.1.5.RELEASE</spring.version>
    <mybatis.version>3.4.6</mybatis.version>
    <log4j.version>1.2.17</log4j.version>
  </properties>
  <dependencies>
    <!-- 测试包 -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <!-- 表示开发的时候引入，发布的时候不会加载此包 -->
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.14</version>
      <scope>provided</scope>
    </dependency>
    <!-- spring核心包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-oxm</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- mybatis核心包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
    <!-- mybatis/spring包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.2</version>
    </dependency>
    <!-- 导入Mysql数据库链接jar包 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.17</version>
    </dependency>
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.5</version>
    </dependency>

    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-dbcp2</artifactId>
      <version>2.7.0</version>
    </dependency>
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter</artifactId>
      <version>RELEASE</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>

EmpMapper.java 与EmpMapper.xml配置

package com.jektong.dao;
import java.util.List;
import com.jektong.entity.Emp;
/**
 * @author jektong 
 * @Date 2020-10-16 10:13:12
 */
public interface EmpMapper {	
	List<Emp> selectAllEmps();
}

EmpMapper.xml配置

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.jektong.dao.EmpMapper">
	<resultMap type="emp" id="empMap">
		<id property="id" column="e_id" jdbcType="INTEGER" />
		<result property="name" column="e_name" jdbcType="VARCHAR" />
		<result property="salary" column="e_salary" jdbcType="DOUBLE" />
		<result property="bonus" column="e_bonus" jdbcType="DOUBLE" />
		<result property="hiredate" column="e_hiredte" jdbcType="DATE" />
		<result property="deptno" column="e_deptno" jdbcType="INTEGER" />
	</resultMap>
	<!-- 查询所有Emp -->
	<select id="selectAllEmps" resultType="list" resultMap="empMap">
		select * from t_emp
	</select>
</mapper>

配置数据源db.properties文件

# mysql
url=jdbc:mysql://localhost:3306/jektong?useUnicode=true&characterEncoding=utf-8
driver=com.mysql.jdbc.Driver
username=jektong
password=123456

配置applicationContext.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: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"

    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/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.1.xsd
		http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-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/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
		http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd
    http://www.springframework.org/schema/jdbc
    http://www.springframework.org/schema/jdbc ">
    

	<!-- 加载配置文件并配置数据库连接池 -->
	<util:properties id="db" location="classpath:db.properties"/>
  <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
    <property name="url" value="#{db.url}"/>
    <property name="password" value="#{db.password}"/>
    <property name="username" value="#{db.username}"/>
    <property name="driverClassName" value="#{db.driver}"/>
  </bean>
  
  <!-- 配置SqlSessionFactoryBean -->
	 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 引用数据源的组件 -->
  	 <property name="dataSource" ref="dataSource"/> 
  	<!-- 映射文件指定 -->
  	<property name="mapperLocations" value="classpath:com/jektong/mapper/*.xml"/>
  	<!-- 类型别名 -->
  	<property name="typeAliasesPackage" value="com.jektong.entity"/>
	</bean> 
	
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.jektong.dao"/>
    <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
	</bean>
</beans>

test

package com.jektong.test;
import java.util.List;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.jektong.dao.EmpMapper;
import com.jektong.entity.Emp;
/**
 * @author jektong
 * @Date 2020-10-15 16:31:58
 */
public class TestOne {
	@Test
	public void t() throws Exception {
	  ApplicationContext ac =
	        new ClassPathXmlApplicationContext("applicationContext.xml");
	  EmpMapper mapper = (EmpMapper) ac.getBean("empMapper");
		List<Emp> selectAllEmps = mapper.selectAllEmps();
		for (Emp emps : selectAllEmps) {
			System.out.println(emps.getName());
		}
	}
}

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