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\u5224\u65ad session \u6709\u6ca1\u6709\u4e00\u4e2a user \u7684\u503c( \u5728\u767b\u5f55\u65f6\u5c31\u628a\u6b64\u503c\u5b58\u5165session), \u5982\u679c\u6ca1\u6709\u8fd9\u4e2a\u503c, \u8bf4\u660e\u6ca1\u767b\u5f55, \u90a3\u4e48\u8df3\u8f6c\u5230\u767b\u5f55\u754c\u9762<\/p>\n\n\n\n
\u5bf9\u4e8e\u767b\u5f55\u9875\u9762\u662f jsp \u7684, \u53ef\u4ee5\u53c2\u8003\u5982\u4e0b\u4ee3\u7801<\/p>\n\n\n\n
@WebFilter(\"\/*\")\npublic class LiginFilter implements Filter{\n public void doFilter(req,resp,chain){\n HttpServletRequest request = (HttpServletRequest)req; \/\/\u8f6c\u6362\u4e3ahttpRequest\n String uri = request.getRequestURI(); \/\/\u83b7\u53d6\u8bf7\u6c42\u8def\u5f84\n if(uri.contains(\"\/login.jsp\") || uri.contains(\"\/loginServlet\")){ \/\/\u4ee5\u53ca\u767b\u5f55\u76f8\u5173\u7684\u9759\u6001\u8d44\u6e90\n chain.doFilter(req,resp); \/\/\u653e\u884c\n }else{\n \/\/\u4ecesession\u4e2d\u53d6\u4e00\u4e2a user \u7684\u503c,\u5224\u65ad\u662f\u5426\u4e3a\u7a7a,\u4e0d\u4e3a\u7a7a\u5219\u5df2\u767b\u5f55\n Object user = request.getSession().getAttribute(\"user\");\n if(user!=null){\n chain.doFilter(req,resp);\n }else{\n \/\/\u6ca1\u6709\u767b\u5f55\n request.setAttribute(\"login_msg\",\"\u60a8\u5c1a\u672a\u767b\u5f55,\u8bf7\u767b\u5f55!\");\n request.getRequestDispatcher(\"\/login.jsp\").forward(request,resp);\n }\n }\n }\n}<\/code><\/pre>\n\n\n\n\u767b\u5f55\u9875\u9762\u662fhtml<\/h2>\n\n\n\n
\u5bf9\u4e8e\u767b\u5f55\u9875\u9762\u662f html\u7684\u60c5\u51b5, \u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u5b9a\u65f63\u79d2\u81ea\u52a8\u8fd4\u56de\u7684\u6837\u5f0f, \u53c2\u8003\u5982\u4e0b<\/p>\n\n\n\n
import javax.servlet.*;\nimport javax.servlet.annotation.WebFilter;\nimport javax.servlet.http.HttpServletRequest;\nimport javax.servlet.http.HttpServletResponse;\nimport java.io.IOException;\n\n@WebFilter(\"\/admin\/*\")\npublic class AdminFilter implements Filter {\n @Override\n public void init(FilterConfig filterConfig) throws ServletException {\n\n }\n\/\/\u7981\u6b62\u672a\u767b\u5f55\u7684admin\n @Override\n public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {\n HttpServletRequest request = (HttpServletRequest) servletRequest;\n HttpServletResponse response = (HttpServletResponse) servletResponse;\n if (request.getSession().getAttribute(\"admin\")==null){\n response.setCharacterEncoding(\"utf-8\");\n String s = \"<!DOCTYPE html><html><head><meta charset='UTF-8'><title>\u672a\u767b\u5f55<\/title>\";\n s+=\"<script>function countDown(){var time=document.getElementById('Time');\";\n s+=\"if(time.innerHTML==0){window.location.href='\"+request.getContextPath()+\"\/index.html'}\";\n s+=\"else{time.innerHTML=time.innerHTML-1}}window.setInterval('countDown()',1000);<\/script>\";\n s+=\"<style>p{font-size:50px;text-align:center}#Time{font-size:100px;text-align:center}<\/style><\/head>\";\n s+=\"<body><p>admin\uff0c\u60a8\u8fd8\u672a\u767b\u5f55!<\/p><p>\u5373\u5c06\u57283\u79d2\u540e\u81ea\u52a8\u8df3\u8f6c\u767b\u5f55\u754c\u9762,\u70b9\u51fb<a href='\"+request.getContextPath()+\"\/index.html'>\";\n s+=\"\u7acb\u523b\u8df3\u8f6c<\/a><\/p><p id='Time'>3<\/p><\/body><\/html>\";\n response.getWriter().println(s);\n }else{\n filterChain.doFilter(request,response);\n }\n }\n\n @Override\n public void destroy() {\n\n }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5f53\u7528\u6237\u6ca1\u6709\u767b\u5f55, \u6216\u6ca1\u6709\u6743\u9650\u65f6, \u90fd\u53ef\u4ee5\u4f7f\u7528filter\u8fdb\u884c\u62e6\u622a, \u4e0b\u8f7d\u6f14\u793a\u5982\u4f55\u8fdb\u884c\u767b\u5f55\u62e6\u622a, \u82e5\u7528\u6237\u6ca1\u6709\u767b\u5f55… \u7ee7\u7eed\u9605\u8bfb filter\u5b9e\u73b0\u767b\u5f55\u62e6\u622a<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[],"_links":{"self":[{"href":"https:\/\/www.52dixiaowo.com\/jsp\/wp-json\/wp\/v2\/posts\/30"}],"collection":[{"href":"https:\/\/www.52dixiaowo.com\/jsp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52dixiaowo.com\/jsp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/jsp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/jsp\/wp-json\/wp\/v2\/comments?post=30"}],"version-history":[{"count":1,"href":"https:\/\/www.52dixiaowo.com\/jsp\/wp-json\/wp\/v2\/posts\/30\/revisions"}],"predecessor-version":[{"id":31,"href":"https:\/\/www.52dixiaowo.com\/jsp\/wp-json\/wp\/v2\/posts\/30\/revisions\/31"}],"wp:attachment":[{"href":"https:\/\/www.52dixiaowo.com\/jsp\/wp-json\/wp\/v2\/media?parent=30"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/jsp\/wp-json\/wp\/v2\/categories?post=30"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/jsp\/wp-json\/wp\/v2\/tags?post=30"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}