Spring声明式事务管理

声明式事务：在配置文件中声明


两种实现方式:

一、基于XML的声明式事务控制

二、基于注解的声明式事务控制


场景实现

A向B转账，A账户转出500，B账户转入500，如果转账过程中发生异常(例如A转出后，网络中断，B无法正常转入)，A、B账户都不会执行操作。


项目结构

数据库表


一、基于XML的声明式事务控制

持久层：实体类

package com.domain;

public class Account {

   String name;
   int money;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getMoney() {
        return money;
    }

    public void setMoney(int money) {
        this.money = money;
    }

    @Override
    public String toString() {
        return "Account{" +
                "name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}

Dao层：操作数据库

接口

package com.dao;

public interface AccountDao {

    public void out(String name,int money);
    public void in(String name,int monet);

}

实现类

package com.dao;

import org.springframework.jdbc.core.JdbcTemplate;

public class AccountDaoImp implements AccountDao{

    private JdbcTemplate jdbcTemplate;

    public void setJdbcTemplate(JdbcTemplate jdbcTemplate){
        this.jdbcTemplate = jdbcTemplate;
    }

    public void out(String name, int money) {
        String sql = "update Account set money=money-"+money+" where name='"+name+"'";
        jdbcTemplate.update(sql);
    }

    public void in(String name, int money) {
        String sql = "update Account set money=money+"+money+" where name='"+name+"'";
        jdbcTemplate.update(sql);
    }
}

业务层

接口

package com.service;

public interface AccountService {

    public void transfer(String outMan,String inMan,int money);
}

实现类

package com.service;

import com.dao.AccountDao;

public class AccountServiceImp implements AccountService {

    private AccountDao accountDao;

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

    public void transfer(String outMan, String inMan, int money) {
        accountDao.out(outMan,money);
        int a = 1/0;
        accountDao.in(inMan,money);
    }
}

控制层

package com.controller;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.service.AccountService;

public class AccountController {

    public static void main(String[] args) {
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("application.xml");
        AccountService accountService = applicationContext.getBean(AccountService.class);
        String inMan = "liu";
        String outMan = "wang";
        accountService.transfer(outMan, inMan, 500);

    }

}

application.xml文件，配置元数据

<?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:context="http://www.springframework.org/schema/context"
       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/cache http://www.springframework.org/schema/cache/spring-cache.xsd
 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
">
    <!--    数据源-->
    <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/one"></property>
        <property name="user" value="root"></property>
        <property name="password" value="admin123"></property>
    </bean>

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

    <bean id="accountDao" class="com.dao.AccountDaoImp">
        <property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>

    <!--目标对象  内部的方法就是切点-->
    <bean id="accountService" class="com.service.AccountServiceImp">
        <property name="accountDao" ref="accountDao"/>
    </bean>

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

<!--    通知，事务的增强-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
<!--        设置事务的属性信息-->
        <tx:attributes>
            <tx:method name="*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
        </tx:attributes>
    </tx:advice>

    <!--配置事务的aop织入-->
    <aop:config>
        <aop:pointcut id="txPointcut" expression="execution(* com.service.*.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
    </aop:config>

</beans>

pom.xml,导入依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>Spring</artifactId>
        <groupId>groupId</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>it_tx</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>
                5.0.5.RELEASE
            </version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.4</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.15</version>
        </dependency>
    </dependencies>
</project>

二、基于注解的声明式事务控制

持久层：实体类

package com.domain;

public class Account {

   String name;
   int money;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getMoney() {
        return money;
    }

    public void setMoney(int money) {
        this.money = money;
    }

    @Override
    public String toString() {
        return "Account{" +
                "name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}

Dao层：操作数据库

接口

package com.dao;

import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;

@Component("accountDao")
//Dao层也可以用@Repository
public interface AccountDao {

    public void out(String name, int money);
    public void in(String name, int monet);

}

实现类

package com.dao;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;

@Component("accountDao")
//Dao层也可以用@Repository
public class AccountDaoImp implements AccountDao{

    @Autowired
    private JdbcTemplate jdbcTemplate;

    public void setJdbcTemplate(JdbcTemplate jdbcTemplate){
        this.jdbcTemplate = jdbcTemplate;
    }

    public void out(String name, int money) {
        String sql = "update Account set money=money-"+money+" where name='"+name+"'";
        jdbcTemplate.update(sql);
    }

    public void in(String name, int money) {
        String sql = "update Account set money=money+"+money+" where name='"+name+"'";
        jdbcTemplate.update(sql);
    }
}

业务层

接口

package com.service;

import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

@Component("accountService")
//业务层也可以用@Service
public interface AccountService {

    public void transfer(String outMan, String inMan, int money);
}

实现类

package com.service;

import com.dao.AccountDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Transactional;

@Component("accountService")
//业务层也可以用@Service
public class AccountServiceImp implements AccountService {

    @Autowired
    private AccountDao accountDao;

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

    @Transactional(isolation = Isolation.REPEATABLE_READ)
    public void transfer(String outMan, String inMan, int money) {
        accountDao.out(outMan,money);
        int a = 1/0;
        accountDao.in(inMan,money);
    }
}

控制层

package com.controller;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.service.AccountService;

public class AccountController {

    public static void main(String[] args) {
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("application.xml");
        AccountService accountService = applicationContext.getBean(AccountService.class);
        String inMan = "liu";
        String outMan = "wang";
        accountService.transfer(outMan, inMan, 500);

    }

}

application.xml文件，配置元数据

<?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:context="http://www.springframework.org/schema/context"
       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/cache http://www.springframework.org/schema/cache/spring-cache.xsd
 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
">

<!--    组件扫描-->
    <context:component-scan base-package="com"></context:component-scan>

    <!--    数据源-->
    <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/one"></property>
        <property name="user" value="root"></property>
        <property name="password" value="admin123"></property>
    </bean>

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

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

<!--    事务注解驱动-->
    <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>

</beans>
posted @ 2021-02-09 17:37  西红柿里没有番茄  阅读(91)  评论(0)    收藏  举报