新建一个切面即可:
package com.haerwang.springboot.exceptionHandler; import java.util.HashMap; import java.util.Map; import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.ResponseBody; /** * @author haerwang * @ControllerAdvice 标识这个类是切面 */ @ControllerAdvice public class GlobalExceptionHandler { @ExceptionHandler(RuntimeException.class) @ResponseBody//拦截后返回给前端的是json格式 public Map<String, Object> exceptionHandler(RuntimeException e) { Map<String, Object> reslut = new HashMap<String, Object>(); reslut.put("code", 500); return reslut; } }