Spring的transaction-manager的用法

2）transaction-manager：

例 2.2.2

注意配置文件头加了两条：spring-tx-3.0.xsd和xmlns:tx

<?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"

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

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"

>

<context:component-scan

base-package="com" />

<context:component-scan

base-package="service" />

<bean id="viewResolver"

class="org.springframework.web.servlet.view.UrlBasedViewResolver">

<property name="viewClass"

value="org.springframework.web.servlet.view.JstlView" />

<property name="prefix" value="/" />

<property name="suffix" value=".jsp" />

</bean>

<bean id="NiutDAO" class="com.NiutDAO">

</bean>

<bean id="loginService" class="service.LoginServiceImpl" >

<property name="niutDAO">

<ref bean="NiutDAO" />

</property>

</bean>

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

<tx:attributes>

<tx:method name="login*" propagation="REQUIRED" />

</tx:attributes>

</tx:advice>

<!-- 配置切面 这种写法也正确"execution(* service.*.*(..))"-->

<aop:config>

<aop:pointcut id="myPointcut" expression="execution(* service.LoginServiceImpl.*(..))" />

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

</aop:config>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" >

<property name="driverClassName"

value="com.mysql.jdbc.Driver"></property>

<property name="url"

value="jdbc:mysql://localhost:3306/test"></property>

<property name="username"

value="root"></property>

<property name="password"

value="1234"></property>

</bean>

<bean id="jt" class="org.springframework.jdbc.core.JdbcTemplate">

<constructor-arg ref="dataSource" />

</bean>

<bean id="transactionManager"

class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

<property name="dataSource" ref="dataSource" />

</bean>

</beans>

package service;

import java.sql.Types;

import javax.annotation.Resource;

import org.springframework.jdbc.core.JdbcTemplate;

import com.NiutDAO;

import service.interfac.ILoginService;

public class LoginServiceImpl implements ILoginService {

@Resource

private JdbcTemplate jt;

NiutDAO niutDAO;

public void setNiutDAO(NiutDAO niutDAO) {

this.niutDAO = niutDAO;

}

public void login() {

updateRegister(15,1);

System.out.println("successfully update 1");

updateRegisterWrong(19,2);

System.out.println("successfully update 2");

}

public void updateRegister(int age,int id) {

String sql = "UPDATE register SET age=? WHERE id=?";

Object params[] = new Object[] { new Integer(age),

new Integer(id) };

int type[] = new int[] { Types.INTEGER , Types.INTEGER };

jt.update(sql, params, type);

}

public void updateRegisterWrong(int age,int id) {

String sql = "UPDATE register SET age=? WWWWWWW id=?";

Object params[] = new Object[] { new Integer(age),

new Integer(id) };

int type[] = new int[] { Types.INTEGER , Types.INTEGER };

jt.update(sql, params, type);

}

}

即使updateRegister(15,1);成功执行，但数据库中结果并没有被更新，因为updateRegisterWrong(19,2);的错误致使updateRegister(15,1);的结果发生了回滚。

输出结果：

successfully update 1

严重: Servlet.service() for servlet spring threw exception

java.sql.SQLException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WWWWWWW id=2' at line 1

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2921)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1570)

更多请见下节：https://blog.csdn.net/qq_44591615/article/details/109206425