java solve cross-domain issues front and back

This article describes the use of Cors JavaWeb method to achieve cross-domain requests problem, very good, with a value for references, you can refer a friend in need

 

Prior to solve cross-domain problems with jsonp, now cross-domain request to solve the problem with java cross-domain CORS:

 

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

response.setHeader("Access-Control-Allow-Origin", "*");

// response type

response.setHeader("Access-Control-Allow-Methods", "POST, GET, DELETE, OPTIONS, DELETE");

// response header

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() { }

}

 

 

web.xml code is 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>