转账-AOP基于xml和基于注解

需求：完成转账操作

环境配置

-,创建表

CREATE DATABASE ee19_spring_day03;
USE ee19_spring_day03;
CREATE TABLE account(
id INT PRIMARY KEY AUTO_INCREMENT,
username VARCHAR(50),
money INT
);
INSERT INTO account(username,money) VALUES('jack','10000');
INSERT INTO account(username,money) VALUES('rose','10000');

二，导入jar包

l 核心：4+1

l aop ： 4 (aop联盟、spring aop、aspectj规范、spring aspect)

l 数据库：2 （jdbc/tx）

l 驱动：mysql

l 连接池：c3p0

转账-AOP基于xml和基于注解

dao层

package com.itheima.dao.impl;

import org.springframework.jdbc.core.support.JdbcDaoSupport;

public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao {

    @Override
    public void out(String outer, Integer money) {
        this.getJdbcTemplate().update("update account set money = money - ? where username = ?", money,outer);
    }
    @Override
    public void in(String inner, Integer money) {
        this.getJdbcTemplate().update("update account set money = money + ? where username = ?", money,inner);
    }
}

service层

package com.itheima.service.impl;

import com.itheima.dao.impl.AccountDao;
public class AccountServiceImpl implements AccountService {
    private AccountDao accountDao;
    public void setAccountDao(AccountDao accountDao) {
        this.accountDao = accountDao;
    }
    @Override
    public void transfer(String outer, String inner, Integer money) {
        accountDao.out(outer, money);
        accountDao.in(inner, money);
    }
}

基于xml的形式如下：

applicationContext.xml文件，放在src下

<?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/aop 
                              http://www.springframework.org/schema/aop/spring-aop.xsd
                              http://www.springframework.org/schema/context 
                              http://www.springframework.org/schema/context/spring-context.xsd
                              http://www.springframework.org/schema/tx 
                              http://www.springframework.org/schema/tx/spring-tx.xsd">
    
    <!-- 1 datasource -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ee19_spring_day03"></property>
        <property name="user" value="root"></property>
        <property name="password" value="123"></property>
    </bean>
    
    <!-- 2 dao  -->
    <bean id="accountDao" class="com.itheima.dao.impl.AccountDaoImpl">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 3 service -->
    <bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl">
        <property name="accountDao" ref="accountDao"></property>
    </bean>


    <!-- 4 事务管理 -->
    <!-- 4.1 事务管理器 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 4.2 事务详情（事务通知）  ， 在aop筛选基础上，对ABC三个确定使用什么样的事务。例如：AC读写、B只读 等
        <tx:attributes> 用于配置事务详情（属性属性）
            <tx:method name=""/> 详情具体配置
                propagation 传播行为 ， REQUIRED：必须；REQUIRES_NEW:必须是新的
                isolation 隔离级别
    -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="transfer" propagation="REQUIRED" isolation="DEFAULT"/>
        </tx:attributes>
    </tx:advice>
    <!-- 4.3 AOP编程，目标类有ABCD（4个连接点），切入点表达式 确定增强的连接器，从而获得切入点：ABC -->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.itheima.service..*.*(..))"/>
    </aop:config>

</beans>

测试类

package com.itheima;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.itheima.service.impl.AccountService;
public class TestApp {   
    @Test
    public void demo01(){
        //获得容器
        String xmlPath = "applicationContext.xml";
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext(xmlPath);
        //获得容器内容，不需要自己new，都是从spring中获得,applicationContext.getBean("accountService")指的是id
        AccountService accountService =  (AccountService) applicationContext.getBean("accountService");
        accountService.transfer("jack", "rose", 1000);
    }

}

转账完成

基于注解的形式如下：修改的是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: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/aop 
                              http://www.springframework.org/schema/aop/spring-aop.xsd
                              http://www.springframework.org/schema/context 
                              http://www.springframework.org/schema/context/spring-context.xsd
                              http://www.springframework.org/schema/tx 
                              http://www.springframework.org/schema/tx/spring-tx.xsd">
    
    <!-- 1 datasource -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ee19_spring_day03"></property>
        <property name="user" value="root"></property>
        <property name="password" value="123"></property>
    </bean>
    
    <!-- 2 dao  -->
    <bean id="accountDao" class="com.itheima.dao.impl.AccountDaoImpl">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 3 service -->
    <bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl">
        <property name="accountDao" ref="accountDao"></property>
    </bean>


    <!-- 4 事务管理 -->
    <!-- 4.1 事务管理器 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 4.2 将管理器交予spring 
        * transaction-manager 配置事务管理器
        * proxy-target-class
            true ： 底层强制使用cglib 代理
    -->
    <tx:annotation-driven transaction-manager="txManager"/>


</beans>

只修改AccountServiceImpl类，如下：添加注解

package com.itheima.service.impl;

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

import com.itheima.dao.impl.AccountDao;

@Transactional(propagation=Propagation.REQUIRED,isolation=Isolation.DEFAULT)    //这代表的是添加的注解形式
public class AccountServiceImpl implements AccountService {

    private AccountDao accountDao;
    public void setAccountDao(AccountDao accountDao) {
        this.accountDao = accountDao;
    }
    @Override
    public void transfer(String outer, String inner, Integer money) {
        accountDao.out(outer, money);
        //断电
//        int i = 1/0;
        accountDao.in(inner, money);
    }

}

运行之前的测试类，即可完成转账，与aop基于xml的形式只有上述的改变而已

转账-AOP基于xml和基于注解

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