文件下载 （java）自己的一些总结

package com.down.servlet;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class DownServlet
*/
public class DownServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
* @see HttpServlet#HttpServlet()
*/
public DownServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
File downFile = new File ("c:\\OriRevision.doc");
InputStream is = new FileInputStream(downFile);
response.setContentType("text/plain;charset=UTF-8");
response.setBufferSize(100 * 1024);
BufferedInputStream bufInputStream = null;
response.setHeader("Cache-Control", "public");
ServletOutputStream os = response.getOutputStream();
//设置现在word正文的相关信息
response.setHeader("Content-Disposition", "inline; filename="+ URLEncoder.encode("test.doc", "UTF-8"));
if(is != null){
byte[] b = new byte[10240];
int index = 0;
os = response.getOutputStream();
bufInputStream = new BufferedInputStream(is);
while((index = bufInputStream.read(b)) != -1){
os.write(b, 0, index);
}
response.flushBuffer();
}
}
}