详解Spring与Mybatis整合方法（基于IDEA中的Maven整合）

项目结构

项目路径可以自己定义，只要路径映射正确就可以

pom.xml

 <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>

Emp.java，EmpMapper.java, EmpMapper.xml

https://www.jb51.net/article/197594.htm

db.properties

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

这里的key值不能写url,driver,username,password,不然后面使用${url},${username}会报错

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 -->
 <context:property-placeholder location="classpath:db.properties"/>

	<!--这里不要使用与name相同的属性名比如写成url-->
 <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
 <property name="url" value="${jdbc.url}"/>
 <property name="password" value="${jdbc.password}"/>
 <property name="username" value="${jdbc.username}"/>
 <property name="driverClassName" value="${jdbc.driver}"/>
 </bean>

 <!-- 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*:mapper/*.xml"/>
 	<!-- 类型别名 -->
 	<property name="typeAliasesPackage" value="com.jektong"/>
	</bean> 

	<!-- sqlSessionFactory已经过时，使用sqlSessionFactoryBeanName，ref改为value -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
 <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
 <property name="basePackage" value="com.jektong.dao"/>
	</bean>
</beans>

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