jsp生成静态页面的方法

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.如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>");
    }
}