JSP生成静态页面HTML的一种方法(一)

package com.easydone.cn.tools.utils;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Date;

/**
* @author Administrator
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
public class MakeHtml {
private static long star = 0;
private static long end = 0;
private static long ttime = 0;

// 返回html代码
public static String getHtmlCode(String httpUrl) {
   Date before = new Date();
   star = before.getTime();
   String htmlCode = "";
   try {
    InputStream in;
    URL url = new java.net.URL(httpUrl);
    HttpURLConnection connection = (HttpURLConnection) url
      .openConnection();
    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;
    while ((currentLine = breader.readLine()) != null) {
     htmlCode += currentLine;
    }
   } catch (Exception e) {
    e.printStackTrace();
   } finally {
    Date after = new Date();
    end = after.getTime();
    ttime = end - star;
    System.out.println("执行时间:" + ttime + "秒");
   }
   return htmlCode;
}

// 存储文件
public static synchronized void writeHtml(String filePath, String info,
    String flag) {

   PrintWriter pw = null;
   try {
    File writeFile = new File(filePath);
    boolean isExit = writeFile.exists();
    if (isExit != true) {
     writeFile.createNewFile();
    } else {
     if (!flag.equals("NO")) {
      writeFile.delete();
      writeFile.createNewFile();
     }
    }
    pw = new PrintWriter(new FileOutputStream(filePath, true));
    pw.println(info);
    pw.close();
   } catch (Exception ex) {
    System.out.println(ex.getMessage());
   } finally {
    pw.close();
   }
}

public static void main(String[] args) {
   String url = "http://www.wodt.cn/index.jsp";
   writeHtml("c:/demo.htm", getHtmlCode(url), "NO");
}
}

JSP生成静态页面HTML的一种方法(二)

import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;


import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;

public class toHtml extends HttpServlet
{

public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
String url="";
String name="";

ServletContext sc = getServletContext();

String file_name=request.getParameter("file_name");//你要访问的jsp文件,如index.jsp
//则你访问这个servlet时加参数.?img align=absmiddle src=/images/emot/url.gif>http://localhost/toHtml?file_name=index

url = "/"+file_name+".jsp";//这是你要生成HTML的jsp文件,如
/http://localhost/index.jsp的执行结果.

name="/home/resin/resin-2.1.6/doc/"+file_name+".htm";//这是生成的html文件名,如index.htm.

RequestDispatcher rd = sc.getRequestDispatcher(url);

final ByteArrayOutputStream os = new ByteArrayOutputStream();

final ServletOutputStream stream = new ServletOutputStream()
{
public void write(byte[] data, int offset, int length)
{
os.write(data, offset, length);
}

public void write(int b) throws IOException
{
os.write(b);
}
};

final PrintWriter pw = new PrintWriter(new OutputStreamWriter(os));

HttpServletResponse rep = new HttpServletResponseWrapper(response)
{
public ServletOutputStream getOutputStream()
{
return stream;
}

public PrintWriter getWriter()
{
return pw;
}
};
rd.include(request, rep);
pw.flush();
FileOutputStream fos = new FileOutputStream(name); //把jsp输出的内容写到xxx.htm
os.writeTo(fos);
fos.close();
PrintWriter out=response.getWriter();
out.print("<p align=center><font size=3 color=red>首页已经成功生成！Andrew</font></p>");
}
}