吴裕雄--天生自然轻量级JAVA EE企业应用开发Struts2Sping4Hibernate整合开发学习笔记：Spring_tx

<?xml version="1.0" encoding="GBK"?>
<project name="spring" basedir="." default="">
    <property name="src" value="src"/>
    <property name="dest" value="classes"/>

    <path id="classpath">
        <fileset dir="../../lib">
            <include name="**/*.jar"/>
        </fileset>
        <pathelement path="${dest}"/>
    </path>

    <target name="compile" description="Compile all source code">
        <delete dir="${dest}"/>
        <mkdir dir="${dest}"/>
        <copy todir="${dest}">
            <fileset dir="${src}">
                <exclude name="**/*.java"/>
            </fileset>        
        </copy>
        <javac destdir="${dest}" debug="true" includeantruntime="yes"
            deprecation="false" optimize="false" failonerror="true">
            <src path="${src}"/>
            <classpath refid="classpath"/>
            <compilerarg value="-Xlint:deprecation"/>
        </javac>
    </target>

    <target name="run" description="Run the main class" depends="compile">
        <java classname="lee.SpringTest" fork="yes" failonerror="true">
            <classpath refid="classpath"/>
        </java>
    </target>

</project>

drop database spring;
create database spring;
use spring;

create table news_inf
(
 news_id int primary key auto_increment,
 news_title varchar(255) unique,
 news_content varchar(255)
);

　　

<?xml version="1.0" encoding="GBK"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://www.springframework.org/schema/beans"
    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-4.0.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
    <!-- 定义数据源Bean，使用C3P0数据源实现，并注入数据源的必要信息 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
        destroy-method="close"
        p:driverClass="com.mysql.jdbc.Driver"
        p:jdbcUrl="jdbc:mysql://localhost/spring"
        p:user="root"
        p:password="32147"
        p:maxPoolSize="40"
        p:minPoolSize="2"
        p:initialPoolSize="2"
        p:maxIdleTime="30"/>
    <!-- 配置JDBC数据源的局部事务管理器，使用DataSourceTransactionManager 类 -->
    <!-- 该类实现PlatformTransactionManager接口，是针对采用数据源连接的特定实现-->
    <!-- 配置DataSourceTransactionManager时需要依注入DataSource的引用 -->
    <bean id="transactionManager" 
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
        p:dataSource-ref="dataSource"/>
    <!-- 配置一个业务逻辑Bean -->
    <bean id="newsDao" class="org.crazyit.app.dao.impl.NewsDaoImpl"
        p:ds-ref="dataSource"/>
    <!-- 配置事务增强处理Bean,指定事务管理器 -->
    <tx:advice id="txAdvice" 
        transaction-manager="transactionManager">
        <!-- 用于配置详细的事务语义 -->
        <tx:attributes>
            <!-- 所有以'get'开头的方法是read-only的 -->
            <tx:method name="get*" read-only="true"/>
            <!-- 其他方法使用默认的事务设置，指定超时时长为5秒 -->
            <tx:method name="*" isolation="DEFAULT"
                propagation="REQUIRED" timeout="5"/>
        </tx:attributes>
    </tx:advice>
    <!-- AOP配置的元素 -->
    <aop:config>
        <!-- 配置一个切入点，匹配org.crazyit.app.dao.impl包下
            所有以Impl结尾的类里、所有方法的执行 -->
        <aop:pointcut id="myPointcut"
            expression="execution(* org.crazyit.app.dao.impl.*Impl.*(..))"/>
        <!-- 指定在myPointcut切入点应用txAdvice事务增强处理 -->
        <aop:advisor advice-ref="txAdvice" 
            pointcut-ref="myPointcut"/>
    </aop:config>
</beans>

package lee;

import org.springframework.context.support.*;
import org.springframework.context.*;

import org.crazyit.app.dao.*;
/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class SpringTest
{
    public static void main(String[] args)
    {
        // 创建Spring容器
        ApplicationContext ctx = new
            ClassPathXmlApplicationContext("beans.xml");
        // 获取事务代理Bean
        NewsDao dao = (NewsDao)ctx
            .getBean("newsDao" , NewsDao.class);
        // 执行插入操作
        dao.insert("疯狂Java" , "轻量级Java EE企业应用实战");
    }
}

package org.crazyit.app.dao;

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public interface NewsDao
{
    public void insert(String title, String content);
}

package org.crazyit.app.dao.impl;

import javax.sql.DataSource;
import java.sql.Connection;

import org.springframework.jdbc.core.JdbcTemplate;

import org.crazyit.app.dao.*;
/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class NewsDaoImpl implements NewsDao
{
    private DataSource ds;
    public void setDs(DataSource ds)
    {
        this.ds = ds;
    }
    public void insert(String title, String content)
    {
        JdbcTemplate jt = new JdbcTemplate(ds);
        jt.update("insert into news_inf"
            + " values(null , ? , ?)"
            , title , content);
        // 两次插入的数据违反唯一键约束
        jt.update("insert into news_inf"
            + " values(null , ? , ?)"
            , title , content);
        // 如果没有事务控制，则第一条记录可以被插入
        // 如果增加事务控制，将发现第一条记录也插不进去。
    }
}