SprignMVC+myBatis调整(二)——基于SqlSessionTemplate

上一节SpringMVC+myBatis的整合还可以利用SqlSessionTemplate组件来实现。

关于Mapper接口，要求不能重复，参数只能有一个，多个参数使用只对象，查询才有返回值。

所有Mapper接口不是DAO，没有DAO灵活方便。所有这里可以用SqlSessionTemplate来操作，把该组件对象注入给DAO，在DAO中利用SqlSessionTemplate编程。

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基本方法如下：

步骤一：编写DAO接口。该接口中方法可以随便定义，不受beanXXX.xml中SQL id的影响。

public interface DeptDao {	public List<Dept> findAllDept();	void addDept(Dept dept);	void deleteDept(Dept dept);	Dept findDeptById(int id);	void updateDept(Dept dept);	List<Dept> findDeptByLoc(String loc);}

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步骤二：编写实现类

@Repositorypublic class OracleDeptDao implements DeptDao {	@Resource  // 注入SqlSessionTemplate对象	private SqlSessionTemplate template;	public List<Dept> findAllDept() {		List<Dept> list = template.selectList("findAllDept");		return list;	}	public void addDept(Dept dept) {		template.insert("addDept", dept);	}	public void deleteDept(Dept dept) {		template.delete("deleteDept", dept);	}	public Dept findDeptById(int id) {		return template.selectOne("findDeptById",id);	}	public List<Dept> findDeptByLoc(String loc) {		return template.selectList("findDeptByLoc", loc);	}	public void updateDept(Dept dept) {		template.update("updateDept", dept);	}	public void setTemplate(SqlSessionTemplate template) {		this.template = template;	}	public SqlSessionTemplate getTemplate() {		return template;	}

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修改配置文件：

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<?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:context="http://www.springframework.org/schema/context"	xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"	xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jpa="http://www.springframework.org/schema/data/jpa"	xmlns:util="http://www.springframework.org/schema/util" xmlns:mvc="http://www.springframework.org/schema/mvc"	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/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd		http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-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/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd		http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">	<context:component-scan base-package="com.lydia" />	<!-- [email protected] -->	<mvc:annotation-driven />		<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource">		<property name="driverClassName" value="oracle.jdbc.OracleDriver" />		<property name="url" value="jdbc:oracle:thin:@localhost:1521:XE" />		<property name="username" value="jsd1403" />		<property name="password" value="root" />	</bean>	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">		<property name="dataSource" ref="myDataSource" />		<property name="mapperLocations" value="classpath:com/lydia/entity/*.xml" />	</bean><!-- +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->	<!-- 定义SqlSessionTemplate -->	<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">		<constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg>	</bean><!-- +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->	<!-- 可以把扫描到的Mapper接口变成Mapper对象  -->	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">		<property name="basePackage" value="com.lydia" />		<property name="annotationClass" value="com.lydia.annotation.MyBatisRepository" />	</bean>	<!-- 视图解析器 -->	<bean id="viewResolver"		class="org.springframework.web.servlet.view.InternalResourceViewResolver">		<property name="prefix">			<value>/WEB-INF/jsp/</value>		</property>		<property name="suffix">			<value>.jsp</value>		</property>	</bean></beans>

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