JSP文件生成静态页面

package com.kenfor.lyb.toHtmlfilter; import java.io.*; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.RequestDispatcher; 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.log4j.*; public class JspFilter implements Filter { Logger logger = Logger.getLogger(this.getClass()); protected FilterConfig config; public void init(FilterConfig config) throws ServletException { // Save the config object this.config = config; } public void destroy() { } 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(".")); //logger.info("fileName="+name); String str_uri = hreq.getRequestURI(); //logger.info("str_uri="+str_uri); String htmpath=hreq.getSession().getServletContext().getRealPath( "/") + "HTML\\" + str_uri.substring(0, str_uri.lastIndexOf("/")) //+"/"+time + "/" + name + ".html"; File file = new File(htmpath); //logger.info("file="+file); String to=hreq.getContextPath() + "/HTML" + str_uri.substring(0, str_uri.lastIndexOf("/")) +"/"+ name + ".html"; //logger.info(to); if (!file.exists()&&hreq.getRequestURL().indexOf(".jsp")> 0) { ServletResponse newResponse =new CharResponseWrapper(hresp); chain.doFilter(request, newResponse); String text = newResponse.toString(); if (text != null) { PrintWriter pw=new PrintWriter(htmpath); pw.println(text); pw.close(); hresp.sendRedirect(to); } } else { hresp.sendRedirect(to); } } }