嵌套事务总结

「爱情、让人受尽委屈。」 2022-02-15 05:59 218阅读 0赞

事务成功总结  
1、内外都无try Catch的时候，外部异常，全部回滚。  
2、内外都无try Catch的时候，内部异常，全部回滚。  
3、外部有try Catch时候，内部异常，全部回滚  
4、内部有try Catch，外部异常，全部回滚  
5、友情提示：外层方法中调取其他接口，或者另外开启线程的操作，一定放到最后！！！(因为调取接口不能回滚，一定要最后来处理)

总结：由于上面的异常被捕获导致，很多事务回滚失败。如果一定要将捕获，请捕获后又抛出RuntimeException（默认为异常捕获RuntimeException）。

package com.ycy.app;
     
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
    import org.springframework.context.annotation.ImportResource;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
     
    /**
     * Created by ycy on 16/7/19.
     */
    @RestController
    @SpringBootApplication
    @EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class})
    @ImportResource({"classpath:/applicationContext.xml"})
    public class Application {
      @Autowired
      private TestBiz testBiz;
     
      @RequestMapping("/")
      String home()  {
        System.out.println("controller 正常执行");
        try {
          testBiz.insetTes();
        } catch (Exception e) {
          System.out.println("controller 异常日志执行");
        }
     
        return " 正常返回Hello World!";
      }
     
      public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);
      }
    }

package com.ycy.app;
     
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
    import org.springframework.transaction.annotation.Transactional;
     
    import com.ycy.service.TestService;
     
    /**
     * Created by ycy on 16/7/20.
     */
    @Component
    public class TestBiz {
      @Autowired
      private TestService testService;
     
      @Transactional
      public void insetTes() throws Exception {
        try {
          for (int j = 0; j < 8; j++) {
            testService.testInsert(j, j + "姓名");
            if (j == 3) {
              int i = 1 / 0;// 此处会产生异常
            }
          }
        } catch (Exception ex) {
          System.out.println("biz层异常日志处理");
          throw new RuntimeException(ex);
        }
        System.out.println("biz层 正常执行");
      }
    }

package com.ycy.service.impl;
     
    import com.ycy.center.dao.entity.YcyTable;
    import com.ycy.center.dao.mapper.YcyTableMapper;
     
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    import org.springframework.transaction.annotation.Transactional;
     
    /**
     * Created by ycy on 16/7/19.
     */
    @Service
    public class TestServiceImpl implements com.ycy.service.TestService {
      @Autowired
      private YcyTableMapper ycyTableMapper;
      @Transactional
      public void testInsert(int num, String name) throws Exception {
        try {
          YcyTable ycyTable = new YcyTable();
          ycyTable.setName(name);
          ycyTable.setNum(num);
          ycyTableMapper.insert(ycyTable);
          if (num== 3) {
            int i = 1 / 0;// 此处会产生异常
          }
        } catch (Exception ex) {
          System.out.println(num + "service异常日志处理");
            throw new RuntimeException(ex);
        }
        System.out.println(num + "service正常执行");
      }
    }