1. mybatis核心配置
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!--<typeAliases>
<package name="com.bjc.pojo"/>
</typeAliases> -->
</configuration>
2. spring配置
<?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-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:jddb.properties" />
<!-- 数据库连接池 -->
<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}" />
<property name="maxActive" value="10" />
<property name="maxIdle" value="5" />
</bean>
<!-- 加载mybatis核心配置文件 -->
<bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactory">
<!-- 数据源 -->
<property name="dataSource" ref="dataSource"></property>
<!-- 核心配置文件 -->
<property name="configLocation" value="classpath:SqlMapConfig.xml"></property>
<!-- 配置别名包扫描 name为typeAliasesPackage value为pojo的包名-->
<property name="typeAliasesPackage" value="com.bjc.pojo"></property>
</bean>
</beans>
3. 配置mapper接口
3.1 方式一:单个接口配置MapperFactoryBean
在mybatis与spring的整合包mybatis-spring-1.2.2.jar中有一个org.mybatis.spring.mapper.MapperFactoryBean<T>,我们只需要将它交给spring管理就可以了。
怎么配置了,我们打开该类,有一个例子
<pre class="code">
* {@code
* <bean id="baseMapper" class="org.mybatis.spring.mapper.MapperFactoryBean" abstract="true" lazy-init="true">
* <property name="sqlSessionFactory" ref="sqlSessionFactory" />
* </bean>
*
* <bean id="oneMapper" parent="baseMapper">
* <property name="mapperInterface" value="my.package.MyMapperInterface" />
* </bean>
*
* <bean id="anotherMapper" parent="baseMapper">
* <property name="mapperInterface" value="my.package.MyAnotherMapperInterface" />
* </bean>
* }
* </pre>
我们直接将其复制到spring的配置文件中,进行改造即可,改造之后如下
<!-- 配置MapperFactoryBean -->
<bean id="baseMapper" class="org.mybatis.spring.mapper.MapperFactoryBean" abstract="true" lazy-init="true">
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>
<bean parent="baseMapper">
<property name="mapperInterface" value="com.bjc.mapper.UserMapper" />
</bean>
注意:
1. 每一个mapper的配置需要有一个parent属性,其属性值为baseMapper
2. property的name属性值是mapperInterface是,因为在MapperFactoryBean中有一个叫做mapperInterface的属性,其有一各set方法。
3. value的属性值即为对应的mapper接口的全称。
完整的配置如下:
<?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-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:jddb.properties" />
<!-- 数据库连接池 -->
<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}" />
<property name="maxActive" value="10" />
<property name="maxIdle" value="5" />
</bean>
<!-- 加载mybatis核心配置文件 -->
<bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactory">
<!-- 数据源 -->
<property name="dataSource" ref="dataSource"></property>
<!-- 核心配置文件 -->
<property name="configLocation" value="classpath:SqlMapConfig.xml"></property>
<!-- 配置别名包扫描 name为typeAliasesPackage value为pojo的包名-->
<property name="typeAliasesPackage" value="com.bjc.pojo"></property>
</bean>
<!-- 配置MapperFactoryBean -->
<bean id="baseMapper" class="org.mybatis.spring.mapper.MapperFactoryBean" abstract="true" lazy-init="true">
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>
<bean parent="baseMapper">
<property name="mapperInterface" value="com.bjc.mapper.UserMapper" />
</bean>
</beans>
接口映射文件:
<?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.bjc.mapper.UserMapper">
<select id="getUser" resultType="user">
SELECT
t.id,
t.username,
t.birthday,
t.sex,
t.address,
t.uuid2
FROM `user` t
</select>
</mapper>
测试类:
package com.bjc.test;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.bjc.mapper.UserMapper;
import com.bjc.pojo.User;
public class TestDemo {
private ApplicationContext applicationContext;
@Before
public void init(){
applicationContext = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
}
@Test
public void test1(){
UserMapper bean = applicationContext.getBean(UserMapper.class);
List<User> user = bean.getUser();
System.out.println(user.toString());
}
}
3.2 方式二:配置包扫描器
在整合包中还有一个类叫做MapperScannerConfigurer,该类就是用于配置包扫描的。
配置方式:只需要在spring的配置文件中配置包扫描即可,其他的不便
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.bjc.mapper" />
</bean>
注意:value为mapper的包名,不要写成了接口名。
完整的配置如下:
<?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-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties" />
<!-- 数据库连接池 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClass}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.user}" />
<property name="password" value="${jdbc.password}" />
<property name="maxActive" value="10" />
<property name="maxIdle" value="5" />
</bean>
<!-- 加载mybatis核心配置文件 -->
<bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactory">
<!-- 数据源 -->
<property name="dataSource" ref="dataSource"></property>
<!-- 核心配置文件 -->
<property name="configLocation" value="classpath:SqlMapConfig.xml"></property>
<!-- 配置别名包扫描 name为typeAliasesPackage value为pojo的包名-->
<property name="typeAliasesPackage" value="com.bjc.pojo"></property>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.bjc.mapper" />
</bean>
</beans>