web -- 前端访问后台跨区问题解决

package com.xindatai.ibs.web.filter;

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.HttpServletResponse;

public class RequestFilter implements Filter {

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletResponse res = (HttpServletResponse)response;
res.setHeader("Access-Control-Allow-Origin", "*");
chain.doFilter(request, response);
}

@Override
public void init(FilterConfig filterConfig) throws ServletException {
// TODO Auto-generated method stub

}

@Override
public void destroy() {
// TODO Auto-generated method stub

}
}