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  • (后端)Java跨域过滤器

     private FilterConfig config = null;
    
        @Override
        public void init(FilterConfig config) throws ServletException {
            this.config = config;
        }
    
        @Override
        public void destroy() {
            this.config = null;
        }
    
        /**
         * 
         * @author wwhhf
         * @since 2016/5/30
         * @comment 跨域的设置
         */
        @Override
        public void doFilter(ServletRequest request, ServletResponse response,
                FilterChain chain) throws IOException, ServletException {
            HttpServletResponse httpResponse = (HttpServletResponse) response;
            // 表明它允许"http://xxx"发起跨域请求
            httpResponse.setHeader("Access-Control-Allow-Origin",
                    config.getInitParameter("AccessControlAllowOrigin"));
            // 表明在xxx秒内,不需要再发送预检验请求,可以缓存该结果
            httpResponse.setHeader("Access-Control-Allow-Methods",
                    config.getInitParameter("AccessControlAllowMethods"));
            // 表明它允许xxx的外域请求
            httpResponse.setHeader("Access-Control-Max-Age",
                    config.getInitParameter("AccessControlMaxAge"));
            // 表明它允许跨域请求包含xxx头
            httpResponse.setHeader("Access-Control-Allow-Headers",
                    config.getInitParameter("AccessControlAllowHeaders"));
            chain.doFilter(request, response);
        }
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  • 原文地址:https://www.cnblogs.com/historylyt/p/7880072.html
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