SpringBoot 默认400,500 异常处理,自定义异常处理

在resources 目录下创建 resources/error 即可,浏览器访问会跳转至定义的页面中

ajax请求自定义异常处理消息

1	`UserNotExistException .java`

package com.imooc.exception;
public class UserNotExistException extends RuntimeException {
    private static final long serialVersionUID = -6112780192479692859L;
     
    private String id;
     
    public UserNotExistException(String id) {
        super("user not exist");
        this.id = id;
    }
 
    public String getId() {
        return id;
    }
 
    public void setId(String id) {
        this.id = id;
    }
 
}

　　ControllerExceptionHandler .java

package com.imooc.web.controller;
 
import java.util.HashMap;
import java.util.Map;
 
import org.springframework.http.HttpStatus;
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.ResponseStatus;
import com.imooc.exception.UserNotExistException;
 
/**
 * 自定义异常处理响应内容
 */
@ControllerAdvice
public class ControllerExceptionHandler {
    // 抛出 UserNotExistException 异常都会被拦截
    @ExceptionHandler(UserNotExistException.class)
    @ResponseBody
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public Map<String, Object> handleUserNotExistException(UserNotExistException ex) {
        Map<String, Object> result = new HashMap<>();
        result.put("id", ex.getId());
        result.put("message", ex.getMessage());
        return result;
    }
 
}