2021-02-08 14:23阅读: 77评论: 0推荐: 0

跨域问题解决方案

 1 import org.springframework.core.annotation.Order;
 2 import org.springframework.stereotype.Component;
 3 import org.springframework.web.filter.OncePerRequestFilter;
 4 import javax.servlet.FilterChain;
 5 import javax.servlet.ServletException;
 6 import javax.servlet.annotation.WebFilter;
 7 import javax.servlet.annotation.WebInitParam;
 8 import javax.servlet.http.HttpServletRequest;
 9 import javax.servlet.http.HttpServletResponse;
10 import java.io.IOException;
11 
12 /**
13  * CorsFilter class
14  * @Date Created in 2021-02-08 14:12
15  * @Version 1.0.0
16  **/
17 
18 @Component
19 @Order(1)
20 @WebFilter(
21         filterName = "corsFilter",
22         urlPatterns = "/*",
23         initParams = {
24                 @WebInitParam(name = "URL", value = "http://ip:port")//此处的ip port指的是服务端的
25         })
26 public class CorsFilter extends OncePerRequestFilter {
27 
28 
29     @Override
30     protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
31         //这个值ajax请求都会带上，值为前端页面部署的ip+port
32         String origin = request.getHeader("Origin");
33         response.setHeader("Access-Control-Allow-Origin",origin);
34         response.setHeader("Access-Control-Allow-Headers","Content-Type,Access-Control-Allow-Origin");
35         response.setHeader("Access-Control-Allow-Credentials","true");
36         response.setHeader("Access-Control-Allow-Methods","GET,POST,OPTIONS,DELETE,HEAD");
37         response.setHeader("Access-Control-Max-Age","3600");
38         filterChain.doFilter(request,response);
39     }
40 }