Using Cors to implement Javaweb cross domain request problems _java

Before resolving cross-domain problems with JSONP, you are now using Cors to implement Cross-domain requests to resolve Java Cross-domain problems:

The main code is as follows

Package com.hy.fliter;
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;
Import Org.apache.commons.httpclient.HttpStatus;
/** * Created by Wangshuai on 2016/7/30. */public class Corsfilter implements Filter {@Override public void init (Filterconfig filterconfig) throws Servletexcepti On {} @Override public void Dofilter (ServletRequest servletrequest, Servletresponse servletresponse, Filterchain FilterC
Hain) throws IOException, servletexception {httpservletresponse response = (httpservletresponse) servletresponse;
HttpServletRequest request = (httpservletrequest) servletrequest;
Specifies that other domain names are allowed to access Response.setheader ("Access-control-allow-origin", "*"); Response type Response.setheader ("Access-control-allow-methods","POST, get, delete, OPTIONS, delete"); Response Header Settings Response.setheader ("Access-control-allow-headers", "Content-type, X-requested-with, X-custom-header,
Haiyi-access-token "); if ("Options". Equals (Request.getmethod ())) {response.setstatus (httpstatus.sc_no_content);} filterchain.dofilter (
ServletRequest, Servletresponse); @Override public void Destroy () {}}

The Web.xml code is configured as follows

<filter>
<filter-name>cors</filter-name>
<filter-class> com.hy.fliter.corsfilter</filter-class>
</filter>
<filter-mapping>
< filter-name>cors</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping >

The above is a small set to introduce the use of cors to achieve Javaweb cross-domain request of the method, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!