标签:xml Spring UserMapper class findAllUser sqlSession 整合 Mybatis public
方式一:
创建spring-dao.xml文件取代mybatis配置文件
<?xml version="1.0" encoding="UTF8"?>
<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
http://www.springframework.org/schema/beans/spring-beans.xsd">
<!--创建一个数据源-->
<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/ljqdb"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
</bean>
<!--整合mybatis配置文件-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:Mapper/*/*.xml"/>
</bean>
<!--创建sqlSession实例-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
</beans>
并非完全取代,setting属性和一些别名设置还是在mybatis配置文件中
<?xml version="1.0" encoding="UTF8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<!--核心配置文件-->
<configuration>
<!-- 别名-->
<typeAliases>
<package name="pojo"/>
</typeAliases>
</configuration>
applicationContext.xml中为真实Bean配置
<?xml version="1.0" encoding="UTF8"?>
<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 http://www.springframework.org/schema/beans/spring-beans.xsd">
<import resource="spring-dao.xml"/>
<bean id="userMapperImpl" class="Mapper.User.UserMapperImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean>
<bean id="userMapper2" class="Mapper.User.UserMapper2">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
</beans>
在UserMapper的实现类中建立sqlSession属性 在bean配置中生成是注入sqlSession
package Mapper.User;
import org.mybatis.spring.SqlSessionTemplate;
import pojo.User;
import java.util.List;
/**
* @author:LeeGaki
* @date:2022/1/14
*/
public class UserMapperImpl implements UserMapper{
private SqlSessionTemplate sqlSession;
public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
@Override
public List<User> findAllUser() {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
return mapper.findAllUser();
}
}
方式二:
省去了注入配置Bean中的sqlSession和sqlSession的注入
用实现类继承SqlSessionDaoSupport类 配置实现类bean的时候
将sqlSessionFactory作为属性的值传进去
<bean id="userMapper2" class="Mapper.User.UserMapper2">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
实现类中则更为简单,只需一行代码
public class UserMapper2 extends SqlSessionDaoSupport implements UserMapper{
@Override
public List<User> findAllUser() {
return getSqlSession().getMapper(UserMapper.class).findAllUser();
}
}
测试类的编写
public class MyTest {
@Test
public void findAll(){
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper2 userMapper2 = context.getBean("userMapper2", UserMapper2.class);
for (User user : userMapper2.findAllUser()) {
System.out.println(user);
}
}
}
标签:xml,Spring,UserMapper,class,findAllUser,sqlSession,整合,Mybatis,public 来源: https://blog.csdn.net/weixin_58473601/article/details/122512943
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。