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

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;
	}

}

　　

业务逻辑中抛出异常