25Spring_事务管理的两种机制

一共有两种事务管理机制：编程式事务管理和声明式事务管理。

1.编程式事务管理企业已经不用了。

2.我们主要讲的是声明式事务管理。声明式事务管理 ，无需要修改原来代码，只需要配置，为目标代码添加事务管理 ， AOP底层实现 --- 企业推荐

下面写一个案例：通过Spring声明式事务管理。实现转账案例。

第一步:建表；

建表语句如下：account中有两个账户（aaa和bbb）

CREATE TABLE `account` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(20) NOT NULL,
  `money` double DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
INSERT INTO `account` VALUES ('1', 'aaa', '1000');
INSERT INTO `account` VALUES ('2', 'bbb', '1000');

创建工程 spring3_day3_transactionmanager

导入IoC核心 4个、 日志2个

测试 1个

AOP 4个

Jdbc 2个

数据库驱动1 个

C3p0 1个

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" alt="" />

引入applicationContext.xml 、 db.properties、 log4j.properties

第二步：写实体类：

//对应数据库中的account表
public class Account {
    private int id;
    private String name;
    private double money;
    /**
     * @return the id
     */
    public int getId() {
        return id;
    }
    /**
     * @param id the id to set
     */
    public void setId(int id) {
        this.id = id;
    }
    /**
     * @return the name
     */
    public String getName() {
        return name;
    }
    /**
     * @param name the name to set
     */
    public void setName(String name) {
        this.name = name;
    }
    /**
     * @return the money
     */
    public double getMoney() {
        return money;
    }
    /**
     * @param money the money to set
     */
    public void setMoney(double money) {
        this.money = money;
    }

}

第三步：写 AccountDao接口：

public interface AccountDao {

//加钱
public void addmoney(String name,double money);
//减钱
public void reducemoney(String name ,double money);
}

第四步：写AccountDao接口的实现类

//继承了JdbcDaoSupport，这样就可以Spring的JDBc的模板
public class AccountDaoimpl extends JdbcDaoSupport implements AccountDao {
    public void addmoney(String name, double money) {
         String sql="update account set money=money+"+money+"where name=?";
         this.getJdbcTemplate().update(sql, name);
    }

    public void reducemoney(String name, double money) {
        String sql="update account set money=money-"+money+"where name=?";
         this.getJdbcTemplate().update(sql, name);    

    }

}

第五步：写转账的接口

/*
 * 转账的接口
 */
public interface AccountService {
    //转钱
public void transfer(String outAccount,String inAccount,double money);

}

第六步：转账接口的实现类

里面的accountDao用@AutoWired注解的方式。

public class AccountServiceimpl implements AccountService {

  /**
   * 这个类是转账接口的实现类。我们要考虑的问题是怎么把Dao给注入进去。
   * 这里用注解的方式 @Autowired。
   * 一旦用这种方式，之前那种set/get方式在applicationContext.xml中的
   * <bean id="AccountService" class="cn.itcast.service.AccountServiceimpl">
     <!--  <property name="accountDao" ref="AccountDao"/>  -->
      </bean>
      里面的property name="accountDao" ref="AccountDao"/>必须去掉。
   *
   *
   */
  @Autowired
    private AccountDao accountDao;

    public void transfer(String outAccount, String inAccount, double money) {

    accountDao.addmoney(inAccount, money);
    accountDao.reducemoney(outAccount, money);

    }

}

第七步：写applicationContext.xml

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
                           http://www.springframework.org/schema/aop
                           http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
                           http://www.springframework.org/schema/context
                           http://www.springframework.org/schema/context/spring-context-2.5.xsd
                           http://www.springframework.org/schema/tx
                           http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

<!-- <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>   -->
<!-- 引入peoperties文件 -->
<!-- <context:property-placeholder location="classpath:db.properties"/> -->
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations" value="classpath:db.properties"/>
</bean>

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
  <property name="driverClass" value="${driver}"/>
  <property name="jdbcUrl" value="${url}"></property>
 <property name="user" value="${username}"></property>
<property name="password" value="${password}"></property>
</bean>  

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"/>
</bean>

<bean id="AccountDao" class="cn.itcast.dao.AccountDaoimpl">
<property name="jdbcTemplate" ref="jdbcTemplate"/>
</bean>
<bean id="AccountService" class="cn.itcast.service.AccountServiceimpl">

</bean>
</beans>

第八步：写Junit测试类

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations="classpath:applicationContext.xml")
public class TestAccount {
    @Autowired
  private AccountService accountService;

    @Test
    public void accounttest()
    {

        accountService.transfer("aaa", "bbb", 200);
    }
}

结果：转账一切正常。但是我们自己在转账函数里面加一个异常：

 *转账接口的实现类
 */
public class AccountServiceimpl implements AccountService {

  /**
   * 这个类是转账接口的实现类。我们要考虑的问题是怎么把Dao给注入进去。
   * 这里用注解的方式 @Autowired。
   * 一旦用这种方式，之前那种set/get方式在applicationContext.xml中的
   * <bean id="AccountService" class="cn.itcast.service.AccountServiceimpl">
     <!--  <property name="accountDao" ref="AccountDao"/>  -->
      </bean>
      里面的property name="accountDao" ref="AccountDao"/>必须去掉。
   *
   *
   */
  @Autowired
    private AccountDao accountDao;

    public void transfer(String outAccount, String inAccount, double money) {

    accountDao.addmoney(inAccount, money);
    int a=1/0;
    accountDao.reducemoney(outAccount, money);

    }

}

那么会就加钱成功。减钱不成功，所以这里就要加入事务。