详解Spring MVC事务配置

要了解事务配置的所有方法，请看一下《Spring事务配置的5种方法》

本文介绍两种配置方法：

一、XML，使用tx标签配置拦截器实现事务

二、Annotation方式

以下所使用环境为Spring4.0.3、Hibernate4.3.5

一、 XML，使用tx标签配置拦截器实现事务

Entity类User.java，持久化类，对应数据库表user

package com.lei.demo.entity;

import javax.persistence.*;

@Entity(name="users")
public class Users {
  
  public Users(){
    super();
  }
  
  @Id
  @GeneratedValue(strategy=GenerationType.AUTO)
  @Column(name="id")
  private Integer id;
  
  @Column(name="user_name",length=32)
  private String user_name;
  
  @Column(name="age")
  private Integer age;
  
  @Column(name="nice_name",length=32)
  private String nice_name;
  
  //属性实现......

}

UserDAO.javar，表user的一些操作，其中属性sessionFactory应该由Spring注入，如下：

package com.lei.demo.dao;

import java.util.List;

import javax.annotation.Resource;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.stereotype.Repository;

import com.lei.demo.entity.Users;

public class UsersDAO {
  private SessionFactory sessionFactory;

  public void setSessionFactory(SessionFactory sessionFactory) {
    this.sessionFactory = sessionFactory;
  }

  public SessionFactory getSessionFactory() {
    return sessionFactory;
  }

  public List<Users> getAllUser(){
    String hsql="from users";
    Session session = sessionFactory.getCurrentSession();
    Query query = session.createQuery(hsql);
    
    return query.list();
  }
}

UserService.java，业务实现类，如下

package com.lei.demo.service;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.lei.demo.dao.*;

public class UserService {
  private UsersDAO userDao;
  
  public int userCount(){
    return userDao.getAllUser().size();
  }

  public UsersDAO getUserDao() {
    return userDao;
  }

  public void setUserDao(UsersDAO userDao) {
    this.userDao = userDao;
  }

}

首先看一下xml配置，spring-hibernate.xml如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:context="http://www.springframework.org/schema/context"
  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"
  xsi:schemaLocation="
    http://www.springframework.org/schema/beans   
    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-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
    ">

  <!-- Hibernate4 -->
  <!-- 加载资源文件 其中包含变量信息，必须在Spring配置文件的最前面加载，即第一个加载-->
  <context:property-placeholder location="classpath:persistence-mysql.properties" />
  
  <bean id="sessionFactory" 
    class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="packagesToScan">
      <list>
        <!-- 可以加多个包 -->
        <value>com.lei.demo.entity</value>
      </list>
    </property>
    <property name="hibernateProperties">
      <props>
        <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
        <prop key="hibernate.dialect">${hibernate.dialect}</prop>
        <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
        <!-- <prop key="hibernate.current_session_context_class">thread</prop> --> 
      </props>
    </property>
  </bean>
  
  <!-- 数据库映射 -->
  <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
   <property name="driverClassName" value="${jdbc.driverClassName}" />
   <property name="url" value="${jdbc.url}" />
   <property name="username" value="${jdbc.user}" />
   <property name="password" value="${jdbc.pass}" />
  </bean>
  
  <!-- 配置Hibernate事务管理器 -->
  <bean id="transactionManager"
    class="org.springframework.orm.hibernate4.HibernateTransactionManager">
   <property name="sessionFactory" ref="sessionFactory" />
  </bean>
  
  <!-- 配置事务[Y_H	\H[YOH\[YOH\H	\H[YOH\[YH[YOH\H	\H[YOH\[YOH\H	X[B	KH:acyX\]y.yfjKI	X[YH[[X[YB\H[[Y]KX\]MX\]U[[X[Y	\H[YOH[XHYH[XH	X[B	KH:acy. n.9l z(KI	X[YH\[^[[][\B\H[[Y]˙[[][\[^[[][\BX[BOB]B. :".+^[:acy.+zg :)z`&/cyYXd[Yb9.9b i9i!:a*9aj9y#:/)9.*acy"l,y.#zg :)y.B9g :)yg*:):acy.+yd+#9i."ZKY\]\\][B]\HHBH\H\[B[\HK[[UNX[[[[Y][XKX[B[Θ^H[[Y][XK^B[Λ][[Y][XKB[ΜH[[Y][XKB[ΞHKS[XKZ[[B[ΝH[[Y][XKB[XS][HB[[Y][XKX[B[[Y][XKX[[X[B[[Y][XK^B[[Y][XK^[^LB[[Y][XK[[Y][XK[]B[[Y][XKB[[Y][XK[MBB	KH9d+9j+!y.""yX[\HKI	^\[\[\\XYHKZK[[B	KH9g9.#9od+yc[[[9#9/o9..'[[X[Y'y.yfjKI	KH9i9y"z+[[[X[Y`/;b&\[.n9.yfj9iyi!9.#:n9.yfj9... 9.*b:/oy.yfjKI	[][Y][[[[X[YH[[X[YB	KH9k.bz)9fjKI	X[\H[[Y]]Y][\[\\Y]\\	\H[YOHY^	[YIRS[YI	\I	\H[YOH^	[YI[YI	\I	X[BX[BOB]B\S"B]\HHBH\H\]NBXYKZK[[˙[BB[\]K][\B[\]^[][\\B[\X\]K]Y\N[\X\]K[[\X\]K[XN[\[[Y]\[\K\]NB[\KZK[[˙[]K\BB\]CBXX\\S\\[YOH[XHCB]]H[XH[XNBXX[XJ[XH[XJH\[XHH[XNCBBXX[XH[XJ
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