java SSM第三章学习内容（Spring与Mybatis整合的方式一：SqlSessionTemplate，二：SqlsessionDaoSupport，三：删除实例化接口）

基本步骤：

1.导jar包到lib下并添加依赖
2.把applicationContext.xml及mybatis-config.xml整合到recources包下

一.第一种引用SqlSessionTemplate

1.创建数据库的实体类Lianxi.java
2.新建一个接口LianxiMapper.java，给于方法
3.新建一个接口的LianxiMapperxml，修改xml内容为SQL语句

4.新建一个类用于实现接口后，使用SqlSessionTemplate类给于getset方法并重写接口方法

5.修改mybatis-config.xml，留下别名即可

6.修改applicationContext.xml里面的配置

7.写测试类并调用实现接口类

参考代码及配置：

LianxiMapper.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.dao.LianxiMapper">

   <select id="selectAll" resultType="Lianxi">
       select * from Lianxi
   </select>
</mapper>

mybatis-config.xml

<?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.entity" />
</typeAliases>
</configuration>

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:p="http://www.springframework.org/schema/p"
   xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
   xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">

   <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
       <property name="dataSource" ref="dataSource" />
       <property name="configLocation" value="classpath:mybatis-config.xml" />
       <property name="mapperLocations">
           <list>
               <value>classpath:com/dao/*.xml</value>
           </list>
       </property>
   </bean>

   <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
       <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"/>
   </bean>

   <bean id="ss" class="com.dao.LianxiMapperImpl"
       p:sqlSessionTemplate-ref="sqlSessionTemplate">
   </bean></beans>

实体类Lianxi：

public class Lianxi {
   private int id;
   private String model;
   private double ofprice;
   private Date ofDate;
   public Lianxi(int id, String model, double ofprice, Date ofDate) {
       super();
       this.id = id;
       this.model = model;
       this.ofprice = ofprice;
       this.ofDate = ofDate;
   }
   public Lianxi() {
       super();
   }
   public int getId() {
       return id;
   }
   public void setId(int id) {
       this.id = id;
   }
   public String getModel() {
       return model;
   }
   public void setModel(String model) {
       this.model = model;
   }
   public double getOfprice() {
       return ofprice;
   }
   public void setOfprice(double ofprice) {
       this.ofprice = ofprice;
   }
   public Date getOfDate() {
       return ofDate;
   }
   public void setOfDate(Date ofDate) {
       this.ofDate = ofDate;
   }
}

LianxiMapper接口：

public interface LianxiMapper {
   public List<Lianxi> selectAll();
}

LianxiMapperImpl实现接口：

public class LianxiMapperImpl implements LianxiMapper{
   private SqlSessionTemplate sqlSessionTemplate;
   public SqlSessionTemplate getSqlSessionTemplate() {
       return sqlSessionTemplate;
   }
   public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {
       this.sqlSessionTemplate = sqlSessionTemplate;
   }
   public List<Lianxi> selectAll() {
       List<Lianxi> list = sqlSessionTemplate.selectList("com.dao.LianxiMapper.selectAll");
       return list;
   }

}

测试类：
public class Lianxi1Test {
   public static void main(String[] args) {
       ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
       LianxiMapperImpl lianxiMapperImpl=(LianxiMapperImpl)context.getBean("ss");
       List<Lianxi> list = lianxiMapperImpl.selectAll();
       for (Lianxi li:list) {
           System.out.println(li.getId()+li.getModel());
       }
   }
}

二.SqlsessionDaoSupport

步骤一样，不同在接口实现类跟之前不同

LianxiMapperImpl代码，继承SqlSessionDaoSupport ：
public class LianxiMapperImpl extends SqlSessionDaoSupport implements LianxiMapper{
   public List<Lianxi> selectAll() {
       SqlSession session = super.getSqlSession();
       List<Lianxi> list = session.selectList("com.dao.LianxiMapper.selectAll");
       return list;
   }
}

三.第三种方法

不需要实例化接口（删除），然后修改applicationContext.xml文件配置

配置文件代码：

<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd">

java SSM第三章学习内容（Spring与Mybatis整合的方式一：SqlSessionTemplate，二：SqlsessionDaoSupport，三：删除实例化接口）

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