Spring事物实例

Spring事务实例：

　　　　entity实体类：

public class Accounts {
    private int accountid;
    private String accountname;
    private double balance;

    public int getAccountid() {
        return accountid;
    }

    public void setAccountid(int accountid) {
        this.accountid = accountid;
    }

    public String getAccountname() {
        return accountname;
    }

    public void setAccountname(String accountname) {
        this.accountname = accountname;
    }

    public double getBalance() {
        return balance;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }
}

　　　　dao层接口：

    //加钱
    void addMoney(double money);

    //减钱
    void subMoney(double money);

　　　　daoimpl实现类接口：

    @Override
    @Transactional(propagation = Propagation.REQUIRED)
    public void addMoney(double money) {
        String sql="UPDATE accounts SET balance=balance+? WHERE accountname='张三'";
        this.getJdbcTemplate().update(sql,money);
    }

    @Override
    @Transactional(propagation = Propagation.REQUIRED)
    public void subMoney(double money) {
        String sql="UPDATE accounts SET balance=balance-? WHERE accountname='小红'";
        this.getJdbcTemplate().update(sql,money);
    }

　　　　service业务层:

    //转账
    void transferMoney();

　　　　service业务实现层：

    //转账的方法
    /*@Transactional(isolation = Isolation.READ_COMMITTED,propagation = Propagation.REQUIRED)*/
    @Transactional
    @Override
    public void transferMoney() {
        accountDao.subMoney();      //价钱
        int num=/;    //模拟一个异常    使用事务解决
        accountDao.addMoney();
    }

　　　　applicationContext.xml文件：

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

    <!--添加jdbc-->
    <bean class="org.springframework.context.support.PropertySourcesPlaceholderConfigurer">
        <property name="location" value="classpath:jdbc.properties"></property>
    </bean>

    <!--配置数据源-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="url" value="${url}"></property>
        <property name="driverClassName" value="${driver}"></property>
        <property name="username" value="${user}"></property>
        <property name="password" value="${password}"></property>
    </bean>

    <!--配置jdbcTemplate核心对象-->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!--Dao接口的实现类对象-->
    <bean id="accountDao" class="com.te.daoimpl.AccountDaoImpl">
        <property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>

    <!--service接口的实现类对象-->
    <bean id="accountService" class="com.te.serviceImpl.AccountServiceImpl">
        <property name="accountDao" ref="accountDao"></property>
    </bean>

    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!--配置事务-->

　　 <!--方式一：工厂配置-->
    <!--配置Spring事务增强的代理工厂Bean-->
    <bean id="transactionProxyFactoryBean" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
        <--事务管理器-->
        <property name="transactionManager" ref="transactionManager"></property>
        <--加载主业务对象-->
        <property name="target" ref="accountService"></property>
        <--设置事务的隔离级别和传播行为-->
        <property name="transactionAttributes">
            <props>
               <--键值key为具体的方法名value，可以为传播行为或隔离级别-->
                <prop key="transferMoney">ISOLATION_READ_UNCOMMITTED,PROPAGATION_REQUIRED</prop>
            </props>
        </property>
    </bean>

　　<!--方式二：AOP配置-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="transferMoney" propagation="REQUIRED" isolation="READ_COMMITTED" />
        </tx:attributes>
    </tx:advice>
    <!--定义切面-->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.te.service.*.*(..))"></aop:advisor>
    </aop:config>

　　<!--方式三：注解式-->　
　　<tx:annotation-driven/>
　　<context:component-scan base-package="com.te"></context:component-scan>

</beans>

　　　　测试：

    @Test
    public void test03(){
        ApplicationContext ctx=new ClassPathXmlApplicationContext("application-del.xml");
        AccountService accountService =(AccountService)ctx.getBean("accountService");
        //转账
        accountService.transferMoney();
    }