spring 事务二：注解springmvc+注解or声明式事务

前面讲了两大类，四种spring事务的方式。这篇主要记录基于注解的springmvc+声明式或者注解式事务。

基于注解的就只要把<tx:advice>注销掉。改成<tx:annotation-driven transaction-manager="transactionManager" />就行。

 

注意的是。在applicationContext.xml中的和[servlet-name]-servlet.xml中的<component-scan>。在前者中，没有包含控制器的包。如果包含，则事务不起作用。具体原因是：

服务器启动加载配置文件的顺序为web.xml---->applicationContext.xml(spring的配置文件)---->[servlet-name]-servlet.xml（springmvc配置文件）。由于applicationContext.xml配置文件中Controller会先进行扫描装配，但是此时Service还没有进行事务增加处理，得到的将是原来的Service（没有经过事务增强处理，故而没有事务处理能力）

所以，在applicationContext.xml中一定要先扫描非Controller中的包。而在[servlet-name]-servlet.xml中扫描Controller中的包。可以是我例子中的那样，也可以这样：

applicationContext.xml中

 

<context:component-scan base-package="com" > 
		<context:exclude-filter expression="org.springframework.stereotype.Controller" type="annotation"/> 
	</context:component-scan>

 [servlet-name]-servlet.xml中

 

<context:component-scan base-package="com" use-default-filters="false" > 
		<context:include-filter expression="org.springframework.stereotype.Controller" type="annotation"/> 
	</context:component-scan>

 

具体例子如下：使用的方式没有上面那个简便。但是用来实验也还可以。

 

package cn.lyy.model;

import org.springframework.stereotype.Component;

@Component
public class Teacher {

	private int id;
	private String name;
	private String email;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

}

 

 

 

package cn.lyy.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import cn.lyy.dao.TeacherDao;
import cn.lyy.model.Teacher;

@Service
public class TeacherService {

	@Autowired
	private TeacherDao teacherDao;

	public void addTeacher(Teacher teacher) {
		teacherDao.insert(teacher);
		//throw  new RuntimeException("运行异常"); //用来演示事务回滚
	}

}

 

 

 

package cn.lyy.dao;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

import cn.lyy.model.Teacher;

@Repository
public class TeacherDao {

	@Autowired
	private JdbcTemplate jdbcTemplate;

	public void insert(Teacher teacher) {
		final String sql = "insert into teacher values(" + teacher.getId()
				+ ",'" + teacher.getName() + "','" + teacher.getEmail() + "')";
		jdbcTemplate.execute(sql);
	}

}

 

 

 

package cn.lyy.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import cn.lyy.model.Teacher;
import cn.lyy.service.TeacherService;

@Controller
@RequestMapping
public class TeacherController {

	@Autowired
	private TeacherService teacherService;

	@RequestMapping(value = "/addteacher.do")
	public void addTeacher() {
		Teacher teacher = new Teacher();
		teacher.setId(3);
		teacher.setName("lyysssss");
		teacher.setEmail("[email protected]");
		teacherService.addTeacher(teacher);
	}
}

 

 

 

<?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"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
         http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context-3.0.xsd">

	<context:property-placeholder location="classpath:jdbc.properties" />

	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close" p:driverClassName="${jdbc.driverClassName}"
		p:url="${jdbc.url}" p:username="${jdbc.username}" p:password="${jdbc.password}" />

	<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"
		p:dataSource-ref="dataSource" />


</beans>

 

 

<?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-3.0.xsd
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context-3.0.xsd
       http://www.springframework.org/schema/tx 
       http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

	<import resource="classpath:applicationContext-dao.xml" />

	<context:component-scan base-package="cn.lyy.dao" />

	<context:component-scan base-package="cn.lyy.model" />

	<context:component-scan base-package="cn.lyy.service" />

	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
		p:dataSource-ref="dataSource" />

	<tx:advice id="txAdvice" transaction-manager="transactionManager">

		<tx:attributes>

			<tx:method name="get*" read-only="true" />

			<tx:method name="add*" isolation="READ_COMMITTED"
				propagation="REQUIRED" rollback-for="java.lang.RuntimeException" />

			<tx:method name="update*" />
		</tx:attributes>
	</tx:advice>

	<aop:config>

		<aop:pointcut id="serviceMethod" expression="execution(* cn.lyy.service.*.*(..))" />

		<aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod" />
	</aop:config>

</beans>

 

#postgre
jdbc.driverClassName=org.postgresql.Driver
jdbc.url=jdbc:postgresql:test
jdbc.username=lyy
jdbc.password=lyy

 

 

 

<?xml version="1.0" encoding="UTF-8"?>
<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:mvc="http://www.springframework.org/schema/mvc" xmlns="http://www.springframework.org/schema/beans"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
       http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">

	<context:component-scan base-package="cn.lyy.controller" />


	<mvc:annotation-driven />

	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/" />
		<property name="suffix" value=".jsp"></property>
	</bean>

</beans>

 其他的就省略了。

总的来说，对事务有了一个大概的了解。接下里就应该了解一下事务的隔离级别，传播途径等内容了！

 

http://inmethetiger.iteye.com/blog/1733375