React+Spring实现跨域问题的完美解决方法

"proxy": {
  "/api/RoomApi": {
   "target": "http://open.douyucdn.cn",
   "changeOrigin":true
  },
  "/api/v1":{
   "target":"http://capi.douyucdn.cn",
   "changeOrigin":true
  }
  }

package com.gg.interceptor;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
public class ProcessInterceptor implements HandlerInterceptor{
 @Override
 public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object handler)
   throws Exception {
  // TODO Auto-generated method stub 
  // 指定白名单域名 http://localhost:8000,http://localhost:8000
  List<String> whileList = new Vector<String>(); 
  whileList.add("http://127.0.0.1:8000");
  whileList.add("http://localhost:8000");
  String clientIp = httpServletRequest.getHeader("origin");
  boolean status = false;
  for(String ip : whileList) {
   if(clientIp!=null&&clientIp.equals(ip)) {
    status = true;
    break;
   }
  }
  /**
   * 网上解决方案是httpServletResponse.setHeader("Access-Control-Allow-Origin","*");设置后发现，还是不能处理跨域问题，需要指定某一个ip，如：http://127.0.0.1:8000 
   * */
  httpServletResponse.setHeader("Access-Control-Allow-Origin",status?clientIp:null); 
  //响应头设置 
  httpServletResponse.setHeader("Access-Control-Allow-Headers", "Content-Type,Content-Length, Authorization, Accept,X-Requested-With"); 
  //响应类型
  httpServletResponse.setHeader("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS"); 
  httpServletResponse.setHeader("X-Powered-By","Jetty"); 
  httpServletResponse.setHeader("Access-Control-Allow-Credentials","true");
  String method= httpServletRequest.getMethod(); 
  if (method.equals("OPTIONS")){ 
   httpServletResponse.setStatus(200); 
   return false; 
  } 
  System.out.println(method+",status:"+status+",clientIp:"+clientIp); 
  return true; 
 }
 @Override
 public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
   ModelAndView modelAndView) throws Exception {
  // TODO Auto-generated method stub
 }
 @Override
 public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
   throws Exception {
  // TODO Auto-generated method stub
 }
}

*login({ payload }, { call, put }){
  let formData = new FormData();
  formData.append("loginId",payload.loginId);//账号
  formData.append("passWord",payload.passWord);//密码
  const response = yield call(requestGuangGao, formData); 
  yield put({
  type: 'changeLoginStatus',
  payload: response,
  });
 },

export async function requestGuangGao(formData){
 // let formData = new FormData();
 // formData.append("loginId",params.loginId);
 // formData.append("passWord",params.passWord);
 console.log("requestGua >url :" );
 return request('http://127.0.0.1:8080/guanggao/userController/login.do', {
 method: 'POST', 
 mode: 'cors', 
 body:formData,
 }); 
}