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package cn.edu.sgu.www.mhxysy.interceptor;import cn.edu.sgu.www.mhxysy.feign.Fei… 这篇文章简单介绍如何自定义一个SpringMVC拦截器并通过拦截器实现具体的功能。 首先需要创建一个自定义的拦截器类该类实现HandlerInterceptor接口。
package cn.edu.sgu.www.mhxysy.interceptor;import cn.edu.sgu.www.mhxysy.feign.FeignService;
import cn.edu.sgu.www.mhxysy.property.NetworkProperties;
import cn.edu.sgu.www.mhxysy.restful.JsonResult;
import cn.edu.sgu.www.mhxysy.restful.ResponseCode;
import cn.edu.sgu.www.mhxysy.util.IpUtils;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.HashSet;
import java.util.List;
import java.util.Set;/*** 自定义拦截器* author heyunlin* version 1.0*/
Slf4j
Component
public class WebInterceptor implements HandlerInterceptor {Value(${spring.application.name})private final String service mhxysy;/*** 匿名接口权限*/private static SetString ANONYMITY_URLS;private final NetworkProperties networkProperties;Autowiredpublic WebInterceptor(FeignService feignService, NetworkProperties networkProperties) {this.networkProperties networkProperties;if (ANONYMITY_URLS null) {ListString permissions feignService.selectAnonymityPermissions(service);ANONYMITY_URLS new HashSet(permissions);}}Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws IOException {// 获取请求urlString requestURI request.getRequestURI();// 1、处理匿名访问接口直接跳过鉴权if (ANONYMITY_URLS.contains(requestURI)) {log.debug(匿名接口 requestURI 正在被访问...);return true;}// 2、内外网控制if (networkProperties.isEnableInnerIpAccess()) {// 得到客户端IPString clientIp IpUtils.getIp();if (!networkProperties.getInnerIps().contains(clientIp)) {// 构建返回对象JsonResultVoid jsonResult JsonResult.error(ResponseCode.FORBIDDEN, requestURI 只允许内网访问~);// 设置内容类型为jsonresponse.setContentType(application/json;charsetutf-8);// 设置响应状态码response.setStatus(ResponseCode.FORBIDDEN.getValue());response.getWriter().write(JSON.toJSONString(jsonResult));return false;}}return true;}/*** 获取匿名接口列表* return SetString*/public static SetString getAnonymityUrls() {return ANONYMITY_URLS;}}
IpUtils.java
package cn.edu.sgu.www.mhxysy.util;import javax.servlet.http.HttpServletRequest;/*** ip地址工具类* author heyunlin* version 1.0*/
public class IpUtils {/*** 获取客户端IP* return String*/public static String getIp() {HttpServletRequest request UserUtils.getRequest();String ip request.getHeader(x-forwarded-for);if (ip null || ip.length() 0 || unknown.equalsIgnoreCase(ip)) {ip request.getHeader(Proxy-Client-IP);}if (ip null || ip.length() 0 || unknown.equalsIgnoreCase(ip)) {ip request.getHeader(WL-Proxy-Client-IP);}if (ip null || ip.length() 0 || unknown.equalsIgnoreCase(ip)) {ip request.getHeader(HTTP_CLIENT_IP);}if (ip null || ip.length() 0 || unknown.equalsIgnoreCase(ip)) {ip request.getHeader(HTTP_X_FORWARDED_FOR);}if (ip null || ip.length() 0 || unknown.equalsIgnoreCase(ip)) {ip request.getHeader(X-Real-IP);}if (ip null || ip.length() 0 || unknown.equalsIgnoreCase(ip)) {ip request.getRemoteAddr();}return ip;}/*** 获取浏览器类型* return String 浏览器类型*/public static String getBrowserType() {HttpServletRequest request UserUtils.getRequest();String type 其它;String browserName request.getHeader(USER-AGENT).toLowerCase();if (browserName.indexOf(msie) 0) {type IE;} else if (browserName.indexOf(firefox) 0) {type Firefox;} else if (browserName.indexOf(chrome) 0) {type Chrome;} else if (browserName.indexOf(opera) 0) {type Opera;} else if (browserName.indexOf(gecko) 0 browserName.indexOf(rv:11) 0) {type IE11;}return type;}}
然后把拦截器注册到SpringMVC
package cn.edu.sgu.www.mhxysy.config;import cn.edu.sgu.www.mhxysy.interceptor.WebInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.ServletContextInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
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.WebMvcConfigurer;import javax.servlet.ServletContext;/*** springmvc配置类* author heyunlin* version 1.0*/
Configuration
public class SpringMvcConfig implements WebMvcConfigurer {Value(${uploads.path})private String uploadPath;private final WebInterceptor webInterceptor;Autowiredpublic SpringMvcConfig(WebInterceptor webInterceptor) {this.webInterceptor webInterceptor;}/*** 解决跨域问题*/Overridepublic void addCorsMappings(CorsRegistry registry) {registry.addMapping(/**).allowedOrigins(*).allowedMethods(*).allowedHeaders(*).allowCredentials(true).maxAge(5000);}/*** 添加静态资源路径*/Overridepublic void addResourceHandlers(ResourceHandlerRegistry registry) {// 配置静态资源路径registry.addResourceHandler(/**).addResourceLocations(classpath:static/).addResourceLocations(file: uploadPath /);// 解决knife4j访问失败问题registry.addResourceHandler(doc.html).addResourceLocations(classpath:/META-INF/resources/);registry.addResourceHandler(/webjars/**).addResourceLocations(classpath:/META-INF/resources/webjars/);}Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(webInterceptor).addPathPatterns(/**);}/*** 设置SESSION_ID* return ServletContextInitializer*/Beanpublic ServletContextInitializer servletContextInitializer() {return new ServletContextInitializer() {Overridepublic void onStartup(ServletContext servletContext) {servletContext.getSessionCookieConfig().setName(MHXYSY_JSESSIONID);}};}}
