配置springboot在访问404时自定义返回结果以及统一异常处理

在搭建项目框架的时候用的是springboot，想统一处理异常，但是发现404的错误总是捕捉不到，总是返回的是springBoot自带的错误结果信息。

如下是springBoot自带的错误结果信息：

{

"timestamp": 1492063521109,

"status": 404,

"error": "Not Found",

"message": "No message available",

"path": "/rest11/auth"

}

配置文件中加上如下配置：

properties格式：

#出现错误时, 直接抛出异常

spring.mvc.throw-exception-if-no-handler-found=true

#不要为我们工程中的资源文件建立映射

spring.resources.add-mappings=false

yml格式：

spring:

#出现错误时, 直接抛出异常(便于异常统一处理，否则捕获不到404)

mvc:

throw-exception-if-no-handler-found: true

#不要为我们工程中的资源文件建立映射

resources:

add-mappings: false

下面是我SpringMVC-config配置代码，里面包含统一异常处理代码，都贴上：

package com.qunyi.jifenzhi_zx.core.config;

import com.alibaba.druid.pool.DruidDataSource;

import com.alibaba.druid.support.http.StatViewServlet;

import com.alibaba.druid.support.http.WebStatFilter;

import com.alibaba.druid.support.spring.stat.BeanTypeAutoProxyCreator;

import com.alibaba.druid.support.spring.stat.DruidStatInterceptor;

import com.alibaba.fastjson.JSON;

import com.alibaba.fastjson.serializer.SerializerFeature;

import com.alibaba.fastjson.support.config.FastJsonConfig;

import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

import com.qunyi.jifenzhi_zx.core.Const;

import com.qunyi.jifenzhi_zx.core.base.exception.ServiceException;

import com.qunyi.jifenzhi_zx.core.base.result.ResponseMsg;

import com.qunyi.jifenzhi_zx.core.base.result.Result;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.boot.web.servlet.FilterRegistrationBean;

import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;

import org.springframework.boot.web.servlet.ServletRegistrationBean;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.http.converter.HttpMessageConverter;

import org.springframework.web.context.request.RequestContextListener;

import org.springframework.web.method.HandlerMethod;

import org.springframework.web.servlet.HandlerExceptionResolver;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.NoHandlerFoundException;

import org.springframework.web.servlet.config.annotation.CorsRegistry;

import org.springframework.web.servlet.config.annotation.InterceptorRegistry;

import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;

import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

import java.nio.charset.Charset;

import java.util.List;

/**

* Spring MVC 配置

* @author xujingyang

* @date 2018/05/25

@Configuration

public class WebMvcConfigurer extends WebMvcConfigurerAdapter {

private final Logger logger = LoggerFactory.getLogger(WebMvcConfigurer.class);

@Value("${spring.profiles.active}")

private String env;//当前激活的配置文件

//使用阿里 FastJson 作为JSON MessageConverter

@Override

public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {

FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();

FastJsonConfig config = new FastJsonConfig();

config.setSerializerFeatures(SerializerFeature.WriteMapNullValue,//保留空的字段

SerializerFeature.WriteNullStringAsEmpty,//String null -> ""

SerializerFeature.WriteNullNumberAsZero);//Number null -> 0

converter.setFastJsonConfig(config);

converter.setDefaultCharset(Charset.forName("UTF-8"));

converters.add(converter);

}

//统一异常处理

@Override

public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {

exceptionResolvers.add(new HandlerExceptionResolver() {

public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception e) {

ResponseMsg result;

if (e instanceof ServiceException) {//业务失败的异常，如“账号或密码错误”

result = new ResponseMsg("501", "业务层出错：" + e.getMessage());

logger.info(e.getMessage());

} else if (e instanceof NoHandlerFoundException) {

result = new ResponseMsg("404", "接口 [" + request.getRequestURI() + "] 不存在");

} else {

result = new ResponseMsg("500", "接口 [" + request.getRequestURI() + "] 错误，请联系管理员！");

String message;

if (handler instanceof HandlerMethod) {

HandlerMethod handlerMethod = (HandlerMethod) handler;

message = String.format("接口 [%s] 出现异常，方法：%s.%s，异常摘要：%s",

request.getRequestURI(),

handlerMethod.getBean().getClass().getName(),

handlerMethod.getMethod().getName(),

e.getMessage());

} else {

message = e.getMessage();

}

logger.error(message, e);

}

responseResult(response, result);

return new ModelAndView();

}

});

}

//解决跨域问题

@Override

public void addCorsMappings(CorsRegistry registry) {

registry.addMapping("/**") // **代表所有路径

.allowedOrigins("*") // allowOrigin指可以通过的ip，*代表所有，可以使用指定的ip，多个的话可以用逗号分隔，默认为*

.allowedMethods("GET", "POST", "HEAD", "PUT", "DELETE") // 指请求方式默认为*

.allowCredentials(false) // 支持证书，默认为true

.maxAge(3600) // 最大过期时间，默认为-1

.allowedHeaders("*");

}

//添加拦截器

@Override

public void addInterceptors(InterceptorRegistry registry) {

//接口登录验证拦截器

if (!"dev".equals(env)) { //开发环境忽略登录验证

registry.addInterceptor(new HandlerInterceptorAdapter() {

@Override

public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

//验证登录

Object obj = request.getSession().getAttribute(Const.LOGIN_SESSION_KEY);

if (obj != null) {

return true;

} else {

logger.warn("请先登录！==> 请求接口：{}，请求IP：{}，请求参数：{}",

request.getRequestURI(), getIpAddress(request), JSON.toJSONString(request.getParameterMap()));

responseResult(response, new ResponseMsg(Result.SIGNERROR));

return false;

}

});

}

private void responseResult(HttpServletResponse response, ResponseMsg result) {

response.setCharacterEncoding("UTF-8");

response.setHeader("Content-type", "application/json;charset=UTF-8");

response.setStatus(200);

try {

response.getWriter().write(JSON.toJSONString(result));

} catch (IOException ex) {

logger.error(ex.getMessage());

}

private String getIpAddress(HttpServletRequest request) {

String ip = request.getHeader("x-forwarded-for");