解决拦截器抛出异常处理类的500状态码Html默认格式响应 ！

解决方式

<mvc:annotation-driven><mvc:message-converters><!-- 配置JSON消息转换器 --><bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"><property name="supportedMediaTypes"><list><value>application/json;charset=UTF-8</value></list></property></bean></mvc:message-converters></mvc:annotation-driven>

将Java对象转换为JSON格式的响应，使用spring-mvc.xml配置适当的消息转换器。

问题出处的相关类如下

interceptor如下

package com.ekgc.interceptor;import com.ekgc.exception.UnLoginException;
import com.ekgc.pojo.SysUser;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;/*** 登录拦截器* 1.实现 HandlerInterceptor接口* 2.实现接口方法* 3.在springmvc.xml中配置拦截器* @author Magic* @version 1.0*/
public class LoginInterceptor implements HandlerInterceptor {@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {System.out.println("preHandle...");// 记录请求处理开始时间request.setAttribute("startTime", System.currentTimeMillis());// 检查用户是否已经登录if (!isLoggedIn(request)) {//抛出未登录异常throw new UnLoginException("您还没有登录！！！");}return true;}@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {System.out.println("postHandle...");// 计算请求处理时间long startTime = (long) request.getAttribute("startTime");long endTime = System.currentTimeMillis();long executionTime = endTime - startTime;System.out.println("Request execution time: " + executionTime + " ms");}@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {System.out.println("afterCompletion...");}private boolean isLoggedIn(HttpServletRequest request) {// 检查用户是否已登录的逻辑HttpSession session = request.getSession();SysUser user = (SysUser) session.getAttribute("user");// 返回true表示已登录，false表示未登录if (user == null) {return false;}return true;}
}

 自定义异常类

package com.ekgc.exception;/*** @author Magic* @version 1.0*/
public class UnLoginException extends RuntimeException{public UnLoginException(String message) {super(message);}
}

 异常处理类

package com.ekgc.exception;import com.ekgc.response.RespBody;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;/*** 登录异常处理类* @author Magic* @version 1.0*/
@ControllerAdvice
public class LoginExceptionHandler {@ExceptionHandler(UnLoginException.class)@ResponseBodypublic RespBody<String> loginExceptionHandler(UnLoginException e) {String message = e.getMessage();System.out.println(message);return new RespBody<String>(-1,message,message);}
}