IT程序员开发必备-各类资源下载清单，史上最全IT资源，个人收藏总结！
例子程序：
package edu.response;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
//以下载的方式向浏览器写数据
public class FileDownloadServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String path = this.getServletContext().getRealPath("/download/美女1.jpg");
String filename = path.substring(path.lastIndexOf("\\")+1);
//如果是下载中文文件需要url编码,否则下载文件正常，但文件名乱码
response.setHeader("content-disposition", "attachment;filename="+URLEncoder.encode(filename,"utf-8"));
InputStream in = null;
OutputStream out = null;
try{
in = new FileInputStream(path);
out = response.getOutputStream();
int len = 0;
byte buffer[] = new byte[1024];
while((len=in.read(buffer))>0){
out.write(buffer,0,len);
}
}finally{
if(in!=null){
in.close();
}
if (out!=null) {
out.close();
}
}
System.out.println(filename);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}