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();

    }

巴特西

Spring事物实例

Spring事务实例：

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