springboot2.0处理自定义异常始终返回json

1. 编写自定义异常类

package cn.jfjb.crud.exception;/**
* @author john
* @date 2019/11/24 - 9:48
*/
public class UserNotExistException extends RuntimeException {
public UserNotExistException() {
super("用户不存在");
}
}

2. 处理自测试异常

package cn.jfjb.crud.handler;import cn.jfjb.crud.exception.UserNotExistException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;import java.util.HashMap;
import java.util.Map;/**
* @author john
* @date 2019/11/24 - 10:43
*/
@ControllerAdvice
public class MyExceptionHandler { @ResponseBody
@ExceptionHandler(UserNotExistException.class)
public Map<String, Object> handleException(Exception e) {
Map<String, Object> map = new HashMap<>();
map.put("code", "user.notexist");
map.put("message", e.getMessage());
return map;
}
}

3. 配置application.yml文件(不配置的话无法获取exception)

server:
error:
include-exception: true


4. 编写测试

package cn.jfjb.crud.controller;import cn.jfjb.crud.exception.UserNotExistException;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;/**
* @author john
* @date 2019/11/22 - 19:38
*/
@Controller
public class HelloController { @RequestMapping({"/testException"})
public String testException(@RequestParam("user") String user) {
if (user != "aaa") {
throw new UserNotExistException();
}
return "index";
}
}