526互联

Spring纯注解的事务管理

发布时间 2023-12-22 23:37:46作者: 谁风霜依旧

Spring纯注解的事务管理

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_07anno_tx_withoutxml</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>
        <jakarta.version>2.1.0</jakarta.version>
        <mysql.version>8.0.33</mysql.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>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <dependency>
            <groupId>jakarta.annotation</groupId>
            <artifactId>jakarta.annotation-api</artifactId>
            <version>${jakarta.version}</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>${aspectjweaver.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>

Service层

package com.zjw.service.impl;

import com.zjw.dao.IAccountDao;
import com.zjw.domain.Account;
import com.zjw.service.IAccountService;
import jakarta.annotation.Resource;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

/**
 * 账户的业务层实现类
 * <p>
 * 事务的控制应该都在业务层
 * @author zjw
 */
@Service("accountService")
@Transactional(propagation = Propagation.SUPPORTS,readOnly = true)
public class AccountServiceImpl implements IAccountService {

    @Resource
    private IAccountDao accountDao;

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

    @Transactional(propagation = Propagation.REQUIRED,readOnly = false)
    @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);

    }
}

Dao层

package com.zjw.dao.impl;

import com.zjw.dao.IAccountDao;
import com.zjw.domain.Account;
import jakarta.annotation.Resource;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * @author zjw
 */
@Repository("accountDao")
public class AccountDaoImpl implements IAccountDao {

    @Resource
    private JdbcTemplate jdbcTemplate;

    @Override
    public Account findAccountById(Integer accountId) {
        List<Account> accounts = jdbcTemplate.query("SELECT * FROM account WHERE id=?", new BeanPropertyRowMapper<>(Account.class),accountId);
        return accounts.isEmpty()?null:accounts.get(0);
    }

    @Override
    public Account findAccountByName(String accountName) {
        List<Account> accounts = jdbcTemplate.query("SELECT * FROM account WHERE name=?", new BeanPropertyRowMapper<>(Account.class),accountName);
        if (accounts.isEmpty()){
            return null;
        }
        if (accounts.size()>1){
            throw new RuntimeException("结果集不唯一");
        }
        return accounts.get(0);
    }

    @Override
    public void updateAccount(Account account) {
        jdbcTemplate.update("UPDATE account SET name=?,money=? WHERE id=?",account.getName(),account.getMoney(),account.getId());
    }
}

数据库配置类

package com.zjw.config;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

import javax.sql.DataSource;

/**
 * 和连接数据库相关的配置类
 * @author zjw
 */
public class JdbcConfig {

    @Value("${jdbc.driver}")
    private String driver;

    @Value("${jdbc.url}")
    private String url;

    @Value("${jdbc.username}")
    private String username;

    @Value("${jdbc.password}")
    private String password;

    /**
     * 创建JdbcTemplate
     * @param dataSource
     * @return
     */
    @Bean(name = "jdbcTemplate")
    public JdbcTemplate createJdbcTemplate(DataSource dataSource){
        return new JdbcTemplate(dataSource);
    }

    /**
     * 创建数据源对象
     * @return
     */
    @Bean(name = "dataSource")
    public DataSource createDataSource(){
        DriverManagerDataSource ds = new DriverManagerDataSource();
        ds.setDriverClassName(driver);
        ds.setUrl(url);
        ds.setUsername(username);
        ds.setPassword(password);
        return ds;
    }
}

Spring配置类

package com.zjw.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.PropertySource;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * spring的配置类，相当于bean.xml
 * @author zjw
 */
@Configuration
@ComponentScan("com.zjw")
@Import({JdbcConfig.class,TransactionConfig.class})
@PropertySource("classpath:jdbcConfig.properties")
@EnableTransactionManagement
public class SpringConfiguration {
}

事务配置类

package com.zjw.config;

import org.springframework.context.annotation.Bean;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;

import javax.sql.DataSource;

/**
 * 和事务相关的配置类
 * @author zjw
 */
public class TransactionConfig {

    @Bean(name = "transactionManager")
    public PlatformTransactionManager createTransactionManager(DataSource dataSource){
        return new DataSourceTransactionManager(dataSource);
    }
}

测试

package com.zjw.test;

import com.zjw.service.IAccountService;
import com.zjw.config.SpringConfiguration;
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;

/**
 * 使用Junit单元测试：测试我们的配置
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfiguration.class)
public class AccountServiceTest {

    @Autowired
    private IAccountService as;

    @Test
    public void testTransfer() {
        as.transfer("aaa", "bbb", 100f);
    }
}