动态JSP页怎样生成静态HTML
发布时间：2023-06-14 14:23:08 所属栏目：教程 来源：
导读：我们在网站项目中为了提高网站访问速度我们都会吧JSP的动态页面变成静态页面，那么你知道动态JSP页怎么生成静态HTML吗？下面我们就去看看动态JSP页生成静态HTML的方法。
具体实现：
利用Filter的过滤功能把*
具体实现：
利用Filter的过滤功能把*
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我们在网站项目中为了提高网站访问速度我们都会吧JSP的动态页面变成静态页面，那么你知道动态JSP页怎么生成静态HTML吗？下面我们就去看看动态JSP页生成静态HTML的方法。 具体实现： 利用Filter的过滤功能把*.jsp过滤出来，判断是否存在对应的.html文件，如果不存在对应的.html文件，则将其内容读出写入指定的.html文件，再跳转到对应的.html即可。如果存在对应的.html文件，则直接跳转到对应的.html即可。 代码： JspFilter.java： import java.io.BufferedReader;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;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;public class JspFilter implements Filter { public void destroy() { // TODO 自动生成方法存根 } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletRequest hreq = (HttpServletRequest) request; HttpServletResponse hresp = (HttpServletResponse) response; String name = hreq.getRequestURL().substring( hreq.getRequestURL().lastIndexOf("/") + 1, hreq.getRequestURL().lastIndexOf(".")); if (hreq.getRequestURL().indexOf(".jsp") != -1 && (null == hreq.getParameter("type") || hreq.getParameter("type").equals(""))) { hresp.sendRedirect(hreq.getContextPath()+"/conversion?name="+hreq.getRequestURL()); return ; } chain.doFilter(request, response); } public void init(FilterConfig arg0) throws ServletException { // TODO 自动生成方法存根 }} ConversionServlet.java： import java.io.BufferedReader;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.HttpURLConnection;import java.net.URL;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class ConversionServlet extends HttpServlet { public ConversionServlet () { super(); } public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); //----获取请求的URL String reqTarget = request.getParameter("name"); //----指定对应JSP的HTML名称 String name = reqTarget.substring(reqTarget.lastIndexOf("/") + 1,reqTarget.lastIndexOf(".")); //---判断是否存在对应的HTML文件 File file = new File(request.getRealPath("/") + name + ".html"); if (!file.exists()) { //--------如果不存在对应的HTML文件 try { file.createNewFile(); //--------创建HTML文件 //-------将JSP的内容写入对应的HTML文件内 InputStream in; StringBuffer sb = new StringBuffer(""); //----注意这里，不能直接访问请求的URL，如果直接访问的话，会陷入死循环 URL url = new java.net.URL(reqTarget.toString()+"?type=11"); HttpURLConnection connection = (HttpURLConnection) url .openConnection(); connection.setRequestProperty("User-Agent", "Mozilla/4.0"); connection.connect(); in = connection.getInputStream(); java.io.BufferedReader breader = new BufferedReader( new InputStreamReader(in, "GBK")); String currentLine; FileOutputStream fos = new FileOutputStream(file); while ((currentLine = breader.readLine()) != null) { sb.append(currentLine); fos.write(currentLine.getBytes()); } if (null != breader) breader.close(); if (null != fos) fos.close(); //---------------转到与JSP对应的HTML页 response.sendRedirect(request.getContextPath()+"/"+name + ".html"); } catch (Exception e) { e.printStackTrace(); } }else{ //----------如果存在指定的HTML，直接跳转到指定的HTML页 response.sendRedirect(request.getContextPath()+"/"+name + ".html"); } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } public void init() throws ServletException { // Put your code here }} WEB.XML配置： <?xml version="1.0" encoding="UTF-8"?><web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <filter> <filter-name>jspfilter</filter-name> <filter-class>com.beanutil.JspFilter</filter-class> </filter> <filter-mapping> <filter-name>jspfilter</filter-name> <url-pattern>*.jsp</url-pattern> </filter-mapping> <servlet> <servlet-name>conversion</servlet-name> <servlet-class>com.beanutil.ConversionServlet </servlet-class> </servlet> <servlet-mapping> <servlet-name>conversion</servlet-name> <url-pattern>/conversion</url-pattern> </servlet-mapping></web-app> （编辑：聊城站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
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