过滤器制作跨域

package com.example.demo.filter;

import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
public class AccessControlAllowOriginFilter implements Filter {

  @Override
  public void doFilter(ServletRequest servletRequest, ServletResponse res, FilterChain filterChain) throws IOException, ServletException {
    HttpServletResponse response = (HttpServletResponse) res;
    response.setHeader("Access-Control-Allow-Origin", "*");
    response.setHeader("Access-Control-Allow-Headers", "Content-Type, Content-Length, Authorization, Accept, X-Requested-With , yourHeaderFeild");
    response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
    response.setHeader("Access-Control-Allow-Credentials", "true");
    filterChain.doFilter(servletRequest,res);
    System.out.println("开始过滤");
  }
  @Override
  public void init(FilterConfig filterConfig) throws ServletException {

  }

  @Override
  public void destroy() {

  }
}