content: package com.itheima.reggie.common;
  
  import lombok.extern.slf4j.Slf4j;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.ControllerAdvice;
  import org.springframework.web.bind.annotation.ExceptionHandler;
  import org.springframework.web.bind.annotation.ResponseBody;
  import org.springframework.web.bind.annotation.RestController;
  import java.sql.SQLIntegrityConstraintViolationException;
  
  /**
   * 全局异常处理
   */
  @ControllerAdvice(annotations = {RestController.class, Controller.class})
  @ResponseBody
  @Slf4j
  public class GlobalExceptionHandler {
  
      /**
       * 异常处理方法
       * @return
       */
      @ExceptionHandler(SQLIntegrityConstraintViolationException.class)
      public R<String> exceptionHandler(SQLIntegrityConstraintViolationException ex){
          log.error(ex.getMessage());
  
          if(ex.getMessage().contains("Duplicate entry")){
              String[] split = ex.getMessage().split(" ");
              String msg = split[2] + "已存在";
              return R.error(msg);
          }
  
          return R.error("未知错误");
      }
  
      /**
       * 异常处理方法
       * @return
       */
      @ExceptionHandler(CustomException.class)
      public R<String> exceptionHandler(CustomException ex){
          log.error(ex.getMessage());
  
          return R.error(ex.getMessage());
      }
  
  }
  