嵌套事物总结

事物成功总结

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） 。

正确的嵌套事物实例

controller层

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);
  }
}

外层biz层：

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");
  }
}

内层service层

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");
  }
}