package com.zth;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
@WebServlet("/download")
public class Download extends HttpServlet {
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
ServletContext context = req.getServletContext();
String fileName = null!= req.getParameter("fileName")?req.getParameter("fileName"):"";
String downName = new String (fileName.getBytes("utf-8"),"iso-8859-1");
resp.setHeader("Content-Disposition","attachment;filename="+downName);
String path = context.getRealPath("ups/"+fileName);
FileInputStream inputStream = new FileInputStream(path);
ServletOutputStream outputStream = resp.getOutputStream();
byte[] buf = new byte[1024*8];
int len = -1;
while ((len = inputStream.read(buf))>0){
outputStream.write(buf,0,len);
}
outputStream.close();
inputStream.close();
}
}
