@Transactional注解异常报错怎么解决

这篇文章主要介绍“@Transactional注解异常报错怎么解决”，在日常操作中，相信很多人在@Transactional注解异常报错怎么解决问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”@Transactional注解异常报错怎么解决”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

@Transactional注解报错之多数据源

如果在加上@Transactional注解之后报错，先查看程序是否为多数据源，之前专门有一章讲解SpringBoot的多数据源实现。多数据源的情况下加事物注解，有可能会出现问题，以下是解决方案。

1.在配置数据源的同时

一定到在其中一个配置上加上@Primary注解，其他的不要加。

package com.wys.config;import org.apache.ibatis.session.sqlSessionFactory;import org.mybatis.spring.SqlSessionFactoryBean;import org.mybatis.spring.SqlSessionTemplate;import org.mybatis.spring.annotation.MapperScan;import org.springframework.beans.factory.annotation.Qualifier;import org.springframework.beans.factory.annotation.Value;import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;import org.springframework.boot.context.properties.ConfigurationProperties;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.Primary;import org.springframework.core.io.support.PathMatchingResourcePatternResolver;import org.springframework.jdbc.datasource.DriverManagerDataSource;import javax.sql.DataSource;@Configuration@MapperScan(basePackages = "com.wys.mapper.**", sqlSessionFactoryRef = "oneSqlSessionFactory")public class OneDataSourceConfig {    @Value("${spring.datasource.one.driver-class-name}")    String driverClass;    @Value("${spring.datasource.one.url}")    String url;    @Value("${spring.datasource.one.username}")    String userName;    @Value("${spring.datasource.one.passWord}")    String passWord;    @Primary    @Bean(name = "oneDataSource")    @ConfigurationProperties("spring.datasource.one")    public DataSource masterDataSource() {        DriverManagerDataSource dataSource = new DriverManagerDataSource();        dataSource.setDriverClassName(driverClass);        dataSource.setUrl(url);        dataSource.setUsername(userName);        dataSource.setPassword(passWord);        return dataSource;    }    @Bean(name = "oneSqlSessionFactory")    public SqlSessionFactory sqlSessionFactory(@Qualifier("oneDataSource") DataSource dataSource) throws Exception {        SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();        sessionFactoryBean.setDataSource(dataSource);        sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()                .getResources("classpath:mybatis/mapper-postgre@Configuration@MapperScan(basePackages = "com.wys.mapper.**", sqlSessionFactoryRef = "oneSqlSessionFactory")public class OneDataSourceConfig {    @Value("${spring.datasource.one.driver-class-name}")    String driverClass;    @Value("${spring.datasource.one.url}")    String url;    @Value("${spring.datasource.one.username}")    String userName;    @Value("${spring.datasource.one.password}")    String passWord;    @Primary    @Bean(name = "oneDataSource")    @ConfigurationProperties("spring.datasource.one")    public DataSource masterDataSource() {        DriverManagerDataSource dataSource = new DriverManagerDataSource();        dataSource.setDriverClassName(driverClass);        dataSource.setUrl(url);        dataSource.setUsername(userName);        dataSource.setPassword(passWord);        return dataSource;    }    @Bean(name = "oneSqlSessionFactory")    public SqlSessionFactory sqlSessionFactory(@Qualifier("oneDataSource") DataSource dataSource) throws Exception {        SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();        sessionFactoryBean.setDataSource(dataSource);        sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()                .getResources("classpath:mybatis/mapper-postgre/*.xml"));                return sessionFactoryBean.getObject();    }    / // 创建事务管理器1    @Bean(name = "oneManager1")    public PlatfORMTransactionManager txManager(@Qualifier("oneDataSource") DataSource dataSource) {        return new DataSourceTransactionManager(dataSource);    }/////////////////////////    @Bean(name = "oneSqlSessionFactory")    public SqlSessionTemplate sqlSessionFactoryTemplate(@Qualifier("oneSqlSessionFactory")SqlSessionFactory sqlSessionFactory ) throws Exception {        return new SqlSessionTemplate(sqlSessionFactory);    }}

在需要加注解的地方加上transactionManager 配置即可。

@Transactional(transactionManager ="oneManager1",rollbackFor=Exception.class)

@Transactional 错误使用的几种场景

 @RestControllerpublic class AController {     @Autowired    AService aService;     // 回滚    @GetMapping("direct")    public void direct() {        aService.testTransactional();    }     // 不回滚    @GetMapping("indirect")    public void indirect() {        aService.testTransactionalIndirect();    }     // 不回滚    @GetMapping("nonPublic")    public void nonPublic() {        aService.testTransactionalNonPublic();    }     // 不回滚    @GetMapping("catchException")    public void catchException() {        aService.testTransactionalCatchException();    }     // 不回滚    @GetMapping("sqlException")    public void sqlException() throws SQLException {        aService.testTransactionalSQLException();    }     // 回滚    @GetMapping("sqlExceptionWithRollbackfor")    public void sqlExceptionWithRollbackfor() throws SQLException {        aService.testTransactionalSQLExceptionWithRollbackfor();    }}

@Servicepublic class AService {     @Autowired    TestTableDAO testTableDAO;     // 回滚    @Transactional    public void testTransactional() {        ATestTable er = new ATestTable();        er.setSummary("test");        testTableDAO.save(er);         throw new RuntimeException("exception");    }     // 不回滚: 类内部方法调用本类内部的其他方法并不会引起事务行为，即使被调用方法使用@Transactional注解进行修饰    public void testTransactionalIndirect() {        testTransactional();    }     // 不回滚: @Transaction注解只对方法名为pubic的才生效    @Transactional    void testTransactionalNonPublic() {        ATestTable er = new ATestTable();        er.setSummary("test");        testTableDAO.save(er);         throw new RuntimeException("exception");    }     // 不回滚    @Transactional    public void testTransactionalCatchException() {        ATestTable er = new ATestTable();        er.setSummary("test");        testTableDAO.save(er);         try {            throw new RuntimeException("exception");        } catch (Exception e) {            System.out.println("catch");        }    }     // 不回滚: @Transactional默认情况下只回滚RuntimeException和Error    @Transactional    public void testTransactionalSQLException() throws SQLException {        ATestTable er = new ATestTable();        er.setSummary("test");        testTableDAO.save(er);         throw new SQLException("exception");    }     // 回滚: 指定在 SQLException 异常发生时回滚    @Transactional(rollbackFor = {            SQLException.class    })    public void testTransactionalSQLExceptionWithRollbackfor() throws SQLException {        ATestTable er = new ATestTable();        er.setSummary("test");        testTableDAO.save(er);         throw new SQLException("exception");    }}

@Repositorypublic interface TestTableDAO        extends JpaRepository<ATestTable, Integer>, JpaSpecificationExecutor<ATestTable> { }

@Entity@Data@Table(name = "test")public class ATestTable {    @Id    @GeneratedValue(strategy = GenerationType.IDENTITY)    int id;     @Column(name = "summary", length = 512)    String summary;}

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