/*
   * response请求跨域公共设置
   */
  public static HttpServletResponse SetHttpServletResponse(
      HttpServletResponse response) {
    response.setHeader("Access-Control-Allow-Origin", "*");
    response.setHeader("Access-Control-Allow-Methods",
        "POST, GET, OPTIONS, DELETE");
    response.setHeader("Access-Control-Max-Age", "3600");
    response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
    return response;
  }

public String xxx(){
  Util.SetHttpServletResponse(response);//解决跨域
  ...
  return xxx;
}