10.Spring事务管理TX

Posted 2020-09-17

转账案例环境搭建

1.引入JAR包

IOC的6个包

AOP的4个包

C3P0的1个包

mysql的1个驱动包

JDBC的2个目标包

整合JUnit测试1个包

2.引入配置文件

 log4j.properties+applicationContext.xml

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.err
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to file mylog.log ###
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=c\\:mylog.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change ‘info‘ to ‘debug‘ ###

log4j.rootLogger=info, stdout

<?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:context="http://www.springframework.org/schema/context"
    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.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop.xsd
    http://www.springframework.org/schema/tx 
    http://www.springframework.org/schema/tx/spring-tx.xsd">
    
    <!-- C3P0连接池 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql:///spring_day03"/>
        <property name="user" value="root"/>
        <property name="password" value="toor"/>
    </bean>
    
    
</beans>

3.创建对应的包结构

public interface AccountDao {
    
    /**
     * 转出
     * @param out
     * @param money
     */
    public void outMoney(String out,double money);
    
    /**
     * 转入
     * @param in
     * @param money
     */
    public void inMoney(String in,double money);

}

public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao {

    //转出
    @Override
    public void outMoney(String out, double money) {
        // TODO Auto-generated method stub
        this.getJdbcTemplate().update("update t_account set money=money-? where name=?", money,out);
    }

    //转入
    @Override
    public void inMoney(String in, double money) {
        // TODO Auto-generated method stub
        this.getJdbcTemplate().update("update t_account set money=money+? where name=?", money,in);
    }

}

public interface AccountService {

    /**
     * 转账
     * @param out
     * @param in
     * @param money
     */
    public void pay(String out,String in,double money);
    
}

public class AccountServiceImpl implements AccountService {

    private AccountDao accountDao;
    public void setAccountDao(AccountDao accountDao) {
        this.accountDao = accountDao;
    }


    @Override
    public void pay(String out, String in, double money) {
        // TODO Auto-generated method stub
        
        //转出
        accountDao.outMoney(out, money);
        
        //异常
        //int i = 1/0;
        
        //转入
        accountDao.inMoney(in, money);
    }

}

4.修改配置文件

    <!-- 管理业务层 注入持久层对象-->
    <bean id="accountService" class="com.spring.demo1.AccountServiceImpl">
        <property name="accountDao" ref="accountDao"/>
    </bean>
    
    <!-- 管理持久层 注入数据源（由于继承JdbcDaoSupport，自动生成JDBC模板类）-->
    <bean id="accountDao" class="com.spring.demo1.AccountDaoImpl">
        <property name="dataSource" ref="dataSource"/>
    </bean>

5.测试

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(value="classpath:applicationContext.xml")
public class Demo1 {
    
    @Resource(name="accountService")
    private AccountService accountService;
    
    @Test
    public void m01(){
        accountService.pay("测试1", "测试2", 1000);
    }

}

不出现异常正常转账

出现异常不回滚

1.XML方式

1.配置事务管理器

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

2.配置事务增强

    <!-- 配置事务增强 -->
    <tx:advice id="myAdvice" transaction-manager="transactionManager">
        <tx:attributes >
            <tx:method name="pay"/>
        </tx:attributes>
    </tx:advice>

　　name="pay" 代表切入点

4.配置AOP切面

    <!-- 配置AOP切面 -->
    <aop:config>
        <aop:advisor advice-ref="myAdvice" pointcut="execution(* com.spring.demo2.AccountServiceImpl.pay(..))"/>
    </aop:config>

　　注意：如果是自己编写的切面，使用<aop:aspect>标签，如果是系统制作的，使用<aop:advisor>标签。

5.测试

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(value="classpath:applicationContext2.xml")
public class Demo1 {
    
    @Resource(name="accountService")
    private AccountService accountService;
    
    @Test
    public void m01(){
        accountService.pay("测试1", "测试2", 1000);
    }

}

不出现异常正常转账

出现异常回滚

2.注解方式

1.配置事务管理器

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

2.开启注解事务

    <!-- 开启注解事务 -->
    <tx:annotation-driven transaction-manager="transactionManager"/>

3.添加注解

在业务层上添加一个注解:@Transactiona

4.测试

不出现异常正常转账

出现异常回滚

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(value="classpath:applicationContext3.xml")
public class Demo1 {
    
    @Resource(name="accountService")
    private AccountService accountService;
    
    @Test
    public void m01(){
        accountService.pay("测试1", "测试2", 1000);
    }

}