嗯还好自己坚持了下来,马上就到最后一个的练习了哈哈哈。
先看依赖:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.automannn.springZhenghe</groupId>
<artifactId>spirngZhenhe</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.1.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.44</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>5.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.8</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
</dependencies>
</project>
关于依赖,它的核心为: mybaits-spring。 需要注意的是,这个厉害了,因为它不是spring实现的整合,而是mybatis主动的整合。
它的使用:
package com.automannn.springZhenhe.dao;
import com.automannn.springZhenhe.entity.Person;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.context.ApplicationContext;
/**
* @author [email protected]
* @time 2018/10/16 17:08
*/
public class MyBatisPersonDao {
SqlSessionFactory sqlSessionFactory;
private void setSqlSessionFactoryBean(ApplicationContext context,String id){
//返回的是DefaultSqlSessionFactory,很奇怪
//this.sqlSessionFactoryBean= (SqlSessionFactoryBean) context.getBean(id);
this.sqlSessionFactory= (SqlSessionFactory) context.getBean(id);
}
public MyBatisPersonDao(ApplicationContext context,String id){
setSqlSessionFactoryBean(context,id);
}
public void add(Person person) throws Exception {
SqlSession sqlSession = sqlSessionFactory.openSession();
PersonMapper personMapper= sqlSession.getMapper(PersonMapper.class);
personMapper.add(person);
}
}
相比较hibernate的方式,这个稍稍要复杂一点。 因为执行逻辑的问题,所以我将具体的操作方法封装到了这个类内部。
它的配置文件:
<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--
引入properties配置文件
-->
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath:jdbc.properties</value>
</property>
</bean>
<bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp2.BasicDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!-- myBatis 整合的配置文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 配置数据库表对应的java实体类 所在的包-->
<property name="typeAliasesPackage" value="com.automannn.springZhenhe.entity" />
<property name="mapperLocations" value="classpath:/mapper/*.xml" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.automannn.springZhenhe.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
</beans>
注意,与模板方法不同的是,我们不再将自己的类通过继承关系配置到spring 容器中,而是以这种非侵入的方式,直接取sqlSessionFactory的方式。 同时这里要会用Mybatis也是一个先觉条件。 自然地,它也包含了它本身的一些配置文件:
package com.automannn.springZhenhe.dao;
import com.automannn.springZhenhe.entity.Person;
/**
* @author [email protected]
* @time 2018/10/16 17:13
*/
public interface PersonMapper {
void add(Person person);
}
<?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.automannn.springZhenhe.dao.PersonMapper">
<resultMap id="personMap" type="com.automannn.springZhenhe.entity.Person">
<id property="pid" column="pid"/>
<result property="pName" column="pname" jdbcType="VARCHAR"/>
</resultMap>
<select id="add" parameterType="com.automannn.springZhenhe.entity.Person">
INSERT INTO person(pid,pname) VALUES (#{pid},#{pName})
</select>
</mapper>
它的入口测试:
package com.automannn.springZhenhe;
import com.automannn.springZhenhe.dao.*;
import com.automannn.springZhenhe.entity.Person;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
* @author [email protected]
* @time 2018/10/16 11:31
*/
public class App {
public static void main(String[] args) throws Exception {
ApplicationContext context = new ClassPathXmlApplicationContext("config.xml");
MyBatisPersonDao myBatisPersonDao= new MyBatisPersonDao(context,"sqlSessionFactory");
Person person = new Person();
person.setPid(12);
person.setpName("ggg");
myBatisPersonDao.add(person);
}
}
运行: