526互联

Spring基于XML AOP事务控制

发布时间 2023-12-22 19:44:34作者: 谁风霜依旧

Spring基于XML AOP事务控制

源码

代码测试

pom.xml

<?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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.zjw</groupId>
    <artifactId>day04_eesy_02account_aoptx_xml</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>17</java.version>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <encoding>UTF-8</encoding>
        <spring.version>6.1.1</spring.version>
        <lombok.version>1.18.30</lombok.version>
        <mysql.version>8.0.33</mysql.version>
        <dbutils.version>1.7</dbutils.version>
        <c3p0.version>0.9.1.2</c3p0.version>
        <junit.version>4.13.2</junit.version>
        <aspectjweaver.version>1.9.21</aspectjweaver.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>commons-dbutils</groupId>
            <artifactId>commons-dbutils</artifactId>
            <version>${dbutils.version}</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>${c3p0.version}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>${aspectjweaver.version}</version>
        </dependency>
    </dependencies>

</project>

Spring配置文件

<?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: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/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">


    <!-- 配置Service -->
    <bean id="accountService" class="com.zjw.service.impl.AccountServiceImpl">
        <!-- 注入dao -->
        <property name="accountDao" ref="accountDao"/>
    </bean>

    <!--配置Dao对象-->
    <bean id="accountDao" class="com.zjw.dao.impl.AccountDaoImpl">
        <!-- 注入QueryRunner -->
        <property name="runner" ref="runner"/>
        <property name="connectionUtils" ref="connectionUtils"/>
    </bean>

    <!--配置QueryRunner-->
    <bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype"/>

    <!-- 配置数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!--连接数据库的必备信息-->
        <property name="driverClass" value="com.mysql.cj.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql://127.0.0.1:3306/eesy_spring?useSSL=false&amp;serverTimeZone=Asia/Shanghai"/>
        <property name="user" value="root"/>
        <property name="password" value="123456"/>
    </bean>

    <!--配置Connection的工具类 ConnectionUtils-->
    <bean id="connectionUtils" class="com.zjw.utils.ConnectionUtils">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--配置事务管理器-->
    <bean id="txManager" class="com.zjw.utils.TransactionManager">
        <property name="connectionUtils" ref="connectionUtils"/>
    </bean>

    <!--配置aop-->
    <aop:config>
        <!--配置通用切入点表达式-->
        <aop:pointcut id="pt1" expression="execution(* com.zjw.service.impl.*.*(..))"/>
        <aop:aspect id="txAdvice" ref="txManager">
            <!--配置前置通知，开启事务-->
            <aop:before method="beginTransaction" pointcut-ref="pt1"/>
            <!--配置后置通知，提交事务-->
            <aop:after-returning method="commit" pointcut-ref="pt1"/>
            <!--配置异常通知，回滚事务-->
            <aop:after-throwing method="rollback" pointcut-ref="pt1"/>
            <!--配置最终通知，释放事务-->
            <aop:after method="release" pointcut-ref="pt1"/>
        </aop:aspect>
    </aop:config>
</beans>

数据库连接工具类

package com.zjw.utils;

import lombok.Setter;

import javax.sql.DataSource;
import java.sql.Connection;

/**
 * @author zjw
 */
public class ConnectionUtils {

    private ThreadLocal<Connection> tl = new ThreadLocal<Connection>();

    @Setter
    private DataSource dataSource;

    public Connection getThreadConnection(){
        try {
            //1、先从ThreadLocal上获取
            Connection conn = tl.get();
            //2、判断当前线程上是否有连接
            if (conn == null){
                //3、从数据源中获取一个连接，并且存入ThreadLocal中
                conn = dataSource.getConnection();
                tl.set(conn);
            }
            //4、返回当前线程上的连接
            return conn;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 把连接和线程解绑
     */
    public void removeConnection(){
        tl.remove();
    }
}

事务管理类，切面类

package com.zjw.utils;

import lombok.Setter;

/**
 * 和事务管理相关的工具类，它包含了，开启事务，提交事务，回滚事务和释放连接
 * @author zjw
 */
public class TransactionManager {

    @Setter
    private ConnectionUtils connectionUtils;

    /**
     * 开启事务
     */
    public void beginTransaction(){
        try {
            connectionUtils.getThreadConnection().setAutoCommit(false);
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    /**
     * 提交事务
     */
    public void commit(){
        try {
            connectionUtils.getThreadConnection().commit();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    /**
     * 回滚事务
     */
    public void rollback(){
        try {
            connectionUtils.getThreadConnection().rollback();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    /**
     * 释放连接
     */
    public void release(){
        try {
            connectionUtils.getThreadConnection().close();
            connectionUtils.removeConnection();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

Dao层实现

package com.zjw.dao.impl;

import com.zjw.dao.IAccountDao;
import com.zjw.domain.Account;
import com.zjw.utils.ConnectionUtils;
import lombok.Setter;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.util.List;

/**
 * 账户的持久层实现类
 * @author zjw
 */
@Setter
public class AccountDaoImpl implements IAccountDao {

    private QueryRunner runner;
    private ConnectionUtils connectionUtils;

    @Override
    public List<Account> findAllAccount() {
        try{
            return runner.query(connectionUtils.getThreadConnection(),"select * from account",new BeanListHandler<Account>(Account.class));
        }catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public Account findAccountById(Integer accountId) {
        try{
            return runner.query(connectionUtils.getThreadConnection(),"select * from account where id = ? ",new BeanHandler<Account>(Account.class),accountId);
        }catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public void saveAccount(Account account) {
        try{
            runner.update(connectionUtils.getThreadConnection(),"insert into account(name,money)values(?,?)",account.getName(),account.getMoney());
        }catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public void updateAccount(Account account) {
        try{
            runner.update(connectionUtils.getThreadConnection(),"update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId());
        }catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public void deleteAccount(Integer accountId) {
        try{
            runner.update(connectionUtils.getThreadConnection(),"delete from account where id=?",accountId);
        }catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public Account findAccountByName(String accountName) {
        try{
            List<Account> accounts =  runner.query(connectionUtils.getThreadConnection(),"select * from account where name = ? ",new BeanListHandler<Account>(Account.class),accountName);
            if (accounts==null || accounts.size()==0){
                return null;
            }
            if (accounts.size() > 1){
                throw new RuntimeException("结果集不唯一，数据有问题");
            }
            return accounts.get(0);
        }catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

Service层实现

这里故意写1/0，来验证事务的回滚操作

package com.zjw.service.impl;

import com.zjw.dao.IAccountDao;
import com.zjw.domain.Account;
import com.zjw.service.IAccountService;
import lombok.Setter;

import java.util.List;

/**
 * 账户的业务层实现类
 * <p>
 * 事务的控制应该都在业务层
 * @author zjw
 */
public class AccountServiceImpl implements IAccountService {

    @Setter
    private IAccountDao accountDao;

    @Override
    public List<Account> findAllAccount() {
        return accountDao.findAllAccount();
    }

    @Override
    public Account findAccountById(Integer accountId) {
        return accountDao.findAccountById(accountId);
    }

    @Override
    public void saveAccount(Account account) {
        accountDao.saveAccount(account);
    }

    @Override
    public void updateAccount(Account account) {
        accountDao.updateAccount(account);
    }

    @Override
    public void deleteAccount(Integer accountId) {
        accountDao.deleteAccount(accountId);
    }

    @Override
    public void transfer(String sourceName, String targetName, Float money) {
        //2、执行操作
        //2.1、根据名称查询转出账户
        Account source = accountDao.findAccountByName(sourceName);
        //2.2、根据名称查询转入账户
        Account target = accountDao.findAccountByName(targetName);
        //2.3、转出账户减钱
        source.setMoney(source.getMoney() - money);
        //2.4、转入账户加钱
        target.setMoney(target.getMoney() + money);
        //2.5、更新转出账户
        accountDao.updateAccount(source);

        int i = 1 / 0;

        //2.6、更新转入账户
        accountDao.updateAccount(target);
    }
}

测试

package com.zjw.test;

import com.zjw.domain.Account;
import com.zjw.service.IAccountService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;

/**
 * 使用Junit单元测试：测试我们的配置
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:bean.xml")
public class AccountServiceTest {

    @Autowired
    private IAccountService as;

    @Test
    public void testTransfer() {
        List<Account> accountList = as.findAllAccount();
        for (Account account : accountList) {
            System.out.println(account);
        }

        as.transfer("aaa", "bbb", 100f);
    }
}

结果

控制台打印异常，数据库数据回滚

java.lang.ArithmeticException: / by zero