articledownloadservlet.java

来自「新闻发布系统」· Java 代码 · 共 61 行

package oa.servlet;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import oa.bean.*;
import oa.main.*;
import java.lang.*;


public class articleDownloadServlet extends HttpServlet {
	static final private String CONTENT_TYPE = "text/html; charset=GB2312";
  //Initialize global variables

  //Process the HTTP Get request
	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
	{
		doPost(request,response);
	}
  //Process the HTTP Post request
	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
	{
		InputStream in = null;
		OutputStream out = response.getOutputStream();
		MailBean mb = null;
		try {
			mb=new MailBean();
			DealString ds=new DealString();
			//取得要下载的文件名
			String name=ds.toString(request.getParameter("newname"));
			String filename=ds.toGBK(request.getParameter("newfile"));
			String filenewname=name;	
			//取得路径
			String temp = oa.main.ParentBean.FilesPath+"news\\appendix\\";  
			String saveDirectory = temp;
			//设定头信息  
			response.setContentType("application/x-download");

			response.setContentType("text/html; charset=ISO2022CN");
			response.setHeader("Content-disposition","attachment; filename="+mb.toUtf8String(filename));
			String filepath=saveDirectory+filenewname;
			//向客户端写入字节流
			in = new BufferedInputStream(new FileInputStream(filepath));
			byte[] buf = new byte[2048];
			int bytesRead;
			while ( (bytesRead = in.read(buf)) != -1) {
				out.write(buf, 0, bytesRead);
			}
        }catch(Exception e){
			System.out.print(e);
        }finally {
			if(mb != null)
				mb.closeConn();
			if (in != null)
				in.close();
		}
	}
  //Clean up resources
	public void destroy() {}
}