后台过滤器处理跨域请求问题

最近由于需要写一个登陆及分页接口, 涉及到跨域的问题,相关过滤器代码贴出来留着以后用

package first;

import java.io.IOException;


import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;




public class HeadersCORSFilter implements Filter {


 
    public void init(FilterConfig filterConfig) throws ServletException {


    }


    @Override
    public void doFilter(ServletRequest request, ServletResponse servletResponse,
            FilterChain chain) throws IOException, ServletException {
    HttpServletRequest request2 = (HttpServletRequest)request;
         HttpServletResponse response = (HttpServletResponse) servletResponse;
         request.setCharacterEncoding("UTF-8");
  response.setCharacterEncoding("UTF-8");

  response.setContentType("application/json;charset=UTF-8");

//response.setHeader("Access-Control-Allow-Origin", ///""*"");   //一开始这样设置,但是前端的新框架请求一直不支持,无奈使用下面的方式指定

         response.setHeader("Access-Control-Allow-Origin", request2.getHeader("origin"));   //允许跨域
         response.setHeader("Access-Control-Allow-Credentials", "true");
         response.setHeader("Access-Control-Allow-Methods", "POST");
         response.setHeader("Access-Control-Max-Age", "3600");
         response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization");
            chain.doFilter(request, servletResponse);
    }


    @Override
    public void destroy() {
        // TODO Auto-generated method stub


    }


}