Jsp生成静态页面的方法--过滤器法

时间：2007-08-13 来源：sdwsyjp

使用jsp生成静态页面.整个工程的目录结构如图:

StaticPage是我们将要生成的静态页面目录所有静态页面都会生成在这个目录.

然后编写一个MyFitler的过滤器:

以下是代码片段：

package com.filter;

import java.io.IOException;
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.HttpServletResponse;
import java.io.File;
import java.io.*;

public class MyFilter implements Filter {
private FilterConfig filterConfig;

public void destroy() {

}

public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {

  String para = arg0.getParameter("id");
  if (para != null) {
   // 获得静态文件生成的绝对地址
   para = arg0.getRealPath("/") + "StaticPage/" + para + ".html";
   File file = new File(para);

   // 判断文件是否存在
   if (!file.exists()) {// 不存在生成
    FileWriter fileWriter = new FileWriter(file);
    StringBuilder sb = new StringBuilder(1000);
    sb.append("这个页面是静态页面
" + para + "
");
    sb.append("当前时间:" + new java.util.Date().toLocaleString()
      + "
");
    sb
      .append("<a>back</a>");
    fileWriter.write(sb.toString());
    fileWriter.flush();
    fileWriter.close();
   }
   // 转向到该html页面
   HttpServletResponse hsr = (HttpServletResponse) arg1;
   hsr.sendRedirect("/BuildeStatic/StaticPage/"
     + arg0.getParameter("id") + ".html");
   return;
  }
  arg2.doFilter(arg0, arg1);
}

public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
this.filterConfig = filterConfig;
}

}

然后配置web.xml使上面的过滤器针对StaticPage目录生效:

然后编写StaticPage下的index.jsp文件作为目录页面

以下是代码片段：
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>index</title>

</head>

<body>
  <a href="/BuildeStatic/StaticPage/index.jsp?id=123">1号静态页面</a>
  <br>
  <a href="/BuildeStatic/StaticPage/index.jsp?id=124">2号静态页面</a>
  <br>
  <a href="/BuildeStatic/StaticPage/index.jsp?id=125">3号静态页面</a>
  <br>
  <a href="/BuildeStatic/StaticPage/index.jsp?id=126">4号静态页面</a>
  <br>
</body>
</html>