spring boot 拦截异常 统一处理

spring boot 默认情况下会映射到 /error 进行异常处理，提示不友好，需要自定义异常处理，提供友好展示

1.自定义异常类(spring 对于 RuntimeException 异常才会进行事务回滚)：

 package com.zpark.tools.exception;
 /**
  * @author cosmo
  * @Title: CommonException
  * @ProjectName
  * @Description:
  * @date
  */
 public class CommonException extends RuntimeException{

     private String rerutnCode;

     private String errorMsg;

     public CommonException(String returnCode ,String errorMsg){
         this.returnCode = returnCode;
         this.errorMsg = errorMsg;
     }

     public String getReturnCode() {
         return returnCode;
     }

     public void setReturnCode(String returnCode) {
         this.returnCode = returnCode;
     }

     public String getErrorMsg() {
         return errorMsg;
     }

     public void setErrorMsg(String errorMsg) {
         this.errorMsg = errorMsg;
     }
 }

2.定义全局异常类：

 package com.zpark.tools.exception;

 import com.zpark.tools.Constants;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.ResponseBody;
 import javax.servlet.http.HttpServletRequest;
 import java.util.HashMap;
 import java.util.Map;

 /**
  * @author cosmo
  * @Title: CommonExceptionHandler
  * @ProjectName
  * @Description:
  * @date
  */
 @ControllerAdvice
 public class CommonExceptionAdvice {

     private Logger log = LoggerFactory.getLogger(CommonExceptionAdvice.class);
     /**
      * 全局异常捕捉处理
      * @param ex
      * @return
      */
     @ResponseBody
     @ExceptionHandler(value = Exception.class)
     public Map errorHandler(HttpServletRequest request,Exception ex) {         Map map = new HashMap();
         map.put("retrnCode", 100);
         map.put("errorMsg", ex.getMessage());         return map;
     } }

运行中出现异常，会返回报错信息和错误code