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;

ServletContext sc = getServletContext();

String file_name=request.getParameter("file_name");//你要訪問的jsp文件,如index.jsp
//則你訪問這個servlet時加參數.如?file_name=index

url = "/"+file_name+".jsp";//這是你要生成HTML的jsp文件,如
//http://localhost/index.jsp的執行結果.

+file_name+".htm";//這是生成的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輸出的內容寫到xxx.htm
os.writeTo(fos);
fos.close();
PrintWriter out=response.getWriter();
out.print("<p align=center><font size=3 color=red>首頁已經成功生成！Andrew</font></p>");
}
}