【spring源码】spring声明式事务底层源码分析+spring事务失效场景总结

本文详细分析了Spring声明式事务的底层实现，从@EnableTransactionManagement注解开始，探讨了AOP代理模式下TransactionManagementConfigurationSelector、AutoProxyRegistrar和InfrastructureAdvisorAutoProxyCreator的角色。同时，介绍了事务失效的常见场景，如数据库引擎不支持事务、非public方法、自身调用、无事务管理器等，并给出了示例代码和解决方案。

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【spring源码】spring声明式事务底层源码分析

注：本文默认大家对spring IOC和AOP都比较熟，不会很赘述一些相关源码，如果有需要，可以参考：

1.环境搭建

依赖jar包

<dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.12.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.41</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.24.RELEASE</version>
        </dependency>
    </dependencies>

2.测试用例

配置类：

@Configuration
@ComponentScan(value = "com.code.tx")
@EnableTransactionManagement
public class TxConfig {

    @Bean
    public DataSource dataSource() throws Exception{
        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        dataSource.setUser("");
        dataSource.setPassword("");
        dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/test");
        dataSource.setDriverClass("");
        return dataSource;
    }

    @Bean
    public JdbcTemplate jdbcTemplate() throws Exception{
        //Spring对@Configuration类会特殊处理；给容器中加组件的方法，多次调用都只是从容器中找组件
        JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource());
        return jdbcTemplate;
    }



    /**
     * 注册事务管理器在容器中
     * @return
     * @throws Exception
     */
    @Bean
    public PlatformTransactionManager transactionManager() throws Exception{
        return new DataSourceTransactionManager(dataSource());
    }
}

测试业务类：

/**
 * 事务注解demo
 *
 * @author wangjie
 * @version V1.0
 * @date 2020/1/9
 */
@Service
public class UserService {

    @Autowired
    private UserDao userDao;

    @Transactional
    public void insertUser(){
        userDao.insert();
        //otherDao.other();xxx
        System.out.println("...");
        int i = 10/0;
    }

}

/**
 * 事务注解demo
 *
 * @author wangjie
 * @version V1.0
 * @date 2020/1/9
 */
@Repository
public class UserDao {

    @Autowired
    private JdbcTemplate jdbcTemplate;
    public void insert(){
        String sql = "INSERT INTO &#