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;

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;

　　　　// 指定允许其他域名访问

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

　　　　// 响应类型

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

　　　　// 响应头设置

　　　　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() { }

}

<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>