关于APP请求跨域问题，JAVA后台配置

//创建跨域类

package com.yr.core.interceptor.cors;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;


@Component
public class CORSInterceptor implements HandlerInterceptor{


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


       response.setHeader("Access-Control-Allow-Origin", "*");
       response.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE");
       response.setHeader("Access-Control-Max-Age", "3600");
       response.setHeader("Access-Control-Allow-Headers", "x-requested-with");


       return true;
   }


   @Override
   public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView)
        throws Exception {


   }


   @Override
   public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
        throws Exception {
   }

}

在配置文件中 添加配置

<!-- 跨域访问 --> <mvc:interceptors> <bean class="com.yr.core.interceptor.cors.CORSInterceptor" /> </mvc:interceptors>