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。
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); }
步骤二:编写实现类
@Repository public 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; }
修改配置文件:
<?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: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" /> <!-- 支持@RequestMapping请求和Controller映射 --> <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>