//package org.nl.config.saconfig;
//
//import org.springframework.core.annotation.Order;
//import org.springframework.stereotype.Component;
//import org.springframework.web.cors.CorsConfiguration;
//
//import javax.servlet.*;
//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;
//import java.io.IOException;
//
///**
// * 跨域过滤器
// * @author kong
// */
//@Component
//@Order(-200)
//public class CorsFilter implements Filter {
//
//	static final String OPTIONS = "OPTIONS";
//
//	@Override
//	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
//			throws IOException, ServletException {
//		HttpServletRequest request = (HttpServletRequest) req;
//		HttpServletResponse response = (HttpServletResponse) res;
//		// 允许指定域访问跨域资源
//		response.setHeader("Access-Control-Allow-Origin", "*");
//		// 允许所有请求方式
//		response.setHeader("Access-Control-Allow-Methods", "*");
//		// 有效时间
//		response.setHeader("Access-Control-Max-Age", "3600");
//		// 允许的header参数
//		response.setHeader("Access-Control-Allow-Headers", "*");
//		response.setHeader("Access-Control-Allow-Credentials", "true");
//
//		// 如果是预检请求，直接返回
//		if (OPTIONS.equals(request.getMethod())) {
//			System.out.println("=======================浏览器发来了OPTIONS预检请求==========");
//			response.getWriter().print("");
//			return;
//		}
//
//		// System.out.println("*********************************过滤器被使用**************************");
//		chain.doFilter(req, res);
//	}
//
//	@Override
//	public void init(FilterConfig filterConfig) {
//	}
//
//	@Override
//	public void destroy() {
//	}
//
//}
