标签:10 配置文件 mapper 新建 Spring mybatis sqlsession spring Mybatis
目录导入依赖
1.connector
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.26</version>
</dependency>
2.mybatis
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.2</version>
</dependency>
3.spring-jdbc
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.12</version>
</dependency>
4.mybatis-spring
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.5</version>
</dependency>
准备工作
新建实体类
新建mapper接口
新建mapper.xml
<?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.wang.mapper.UserMapper">
<select id="getUsers" resultType="com.wang.pojo.User">
select * from mybatis1.user
</select>
</mapper>
新建Mybatis核心配置文件
<?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.wang.pojo"/>
</typeAliases>
</configuration>
新建mybatis-spring配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd">
<!--数据源-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis1?useUnicode=true&characterEncoding=UTF-8"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</bean>
<!-- sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 加载 MyBatis 的配置文件 -->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<!-- 数据源 -->
<property name="dataSource" ref="dataSource"/>
<!--注册mapper-->
<property name="mapperLocations" value="classpath:com/wang/mapper/*Mapper.xml"/>
</bean>
<!--sqlSessionTemplate-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
</beans>
新建Mapper实现类
package com.wang.mapper;
import com.wang.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;
import java.util.List;
public class UserMapperImpl implements UserMapper{
private SqlSessionTemplate sqlsession;
public void setSqlsession(SqlSessionTemplate sqlsession) {
this.sqlsession = sqlsession;
}
@Override
public List<User> getUsers() {
return sqlsession.getMapper(UserMapper.class).getUsers();
}
}
到spring中注册实现类
<!-- mapper实现类-->
<bean id="userMapper" class="com.wang.mapper.UserMapperImpl">
<property name="sqlsession" ref="sqlSession"/>
</bean>
测试
@Test
public void test1(){
ApplicationContext context = new ClassPathXmlApplicationContext("spring-dao.xml");
UserMapper userMapper = (UserMapper) context.getBean("userMapper");
List<User> users = userMapper.getUsers();
for (User user : users) {
System.out.println(user);
}
}
结果:
标签:10,配置文件,mapper,新建,Spring,mybatis,sqlsession,spring,Mybatis 来源: https://www.cnblogs.com/xzjava/p/15609945.html
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