Spring整合Mybatis
Spring整合Mybatis
导入依赖
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.13</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.13</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.7</version>
</dependency>
</dependencies>
使用Spring创建SqlSessionTemplate对象(用途和SqlSession一样)
<?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: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/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 使用Spring的数据源替换Mybatis的配置 -->
<bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="url"
value="jdbc:mysql://localhost:3306/mybatis?useSSL=false&useUnicode=true&characterEncoding=utf8"/>
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</bean>
<!--SqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--数据库配置-->
<property name="dataSource" ref="datasource"/>
<!--绑定Mybatis配置文件-->
<property name="configLocation" value="mybatis-config.xml"/>
<!--绑定映射-->
<property name="mapperLocations" value="com/mybatis/mapper/*.xml"/>
</bean>
<!--SqlSessionTemplate：就是以前使用的sqlSession-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<!--因为源码没有set方法，所以使用有参构造-->
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
</beans>
整合到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: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/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<import resource="spring-dao.xml"/>
<!--将SqlSessionTemplate注入实现类-->
<bean id="UserMapperImpl" class="com.mybatis.mapper.impl.UserMapperImpl">
<!--注入SqlSessionTemplate(需要创建)-->
<property name="sqlSession" ref="sqlSession"/>
</bean>
<bean id="UserMapperImpl2" class="com.mybatis.mapper.impl.UserMapperImpl2">
<!--注入SqlSessionFactory(不用创建SqlSessionTemplate)-->
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
</beans>
此时可以留着mybatis-config.xml做一些简单配置
<?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>
<!--起别名-->
<typeAliases>
<package name="com.mybatis.beans"/>
</typeAliases>
</configuration>
实体类
public class User {
private int id;
private String name;
private String pwd;
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", pwd='" + pwd + '\'' +
'}';
}
public User() {
}
public User(int id, String name, String pwd) {
this.id = id;
this.name = name;
this.pwd = pwd;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
}
接口
public interface UserMapper {
List<User> selectAllUsers();
}
接口的映射文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mybatis.mapper.UserMapper">
<select id="selectAllUsers" resultType="User">
select *
from `user`;
</select>
</mapper>
方式一
接口实现类
public class UserMapperImpl implements UserMapper {
private SqlSessionTemplate sqlSession;
public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
@Override
public List<User> selectAllUsers() {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
List<User> users = mapper.selectAllUsers();
return users;
}
}
方式二（继承 SqlSessionDaoSupport）
public class UserMapperImpl2 extends SqlSessionDaoSupport implements UserMapper {
@Override
public List<User> selectAllUsers() {
UserMapper mapper = getSqlSessionTemplate().getMapper(UserMapper.class);
List<User> users = mapper.selectAllUsers();
return users;
}
}
测试类
public class MyTest {
@Test
public void test01() {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper = context.getBean("UserMapperImpl", UserMapperImpl.class);
List<User> users = userMapper.selectAllUsers();
for (User user : users) {
System.out.println(user);
}
}
@Test
public void test02() {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper = context.getBean("UserMapperImpl2", UserMapperImpl2.class);
List<User> users = userMapper.selectAllUsers();
for (User user : users) {
System.out.println(user);
}
}
}
