Java solves cross-domain issues in front and back of the table

This article mainly introduces the use of cors to achieve Javaweb cross-domain request problem method, very good, with reference value, the need for friends can refer to the following

Before solving cross-domain problems with JSONP, we now use cors to implement cross-domain requests to solve Java cross-domain issues:

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 Servletexception {}

@Override

public void DoFilter (ServletRequest servletrequest, Servletresponse servletresponse, Filterchain Filterchain) throws IOException, Servletexception {

HttpServletResponse response = (httpservletresponse) servletresponse;

HttpServletRequest request = (httpservletrequest) servletrequest;

Specify allow other domain names to be accessed

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>

Java solves cross-domain issues in front and back of the table