import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.sun.javafx.image.impl.ByteRgb;
public class download extends HttpServlet{
public void doPost(HttpServletRequest request , HttpServletResponse response){
//设置Content-Type 为application/zip
response.setContentType("application/zip");
//指定文件名 用户保存文件默认文件名
response.setHeader("Content-disposition", "attachment; filename=data.zip");
//指定文件的位置
String fileURL="http://localhost:8080/text/data.zip";
try {
URL url=new URL(fileURL);
try {
BufferedInputStream bis=new BufferedInputStream(url.openStream());
BufferedOutputStream bos=new BufferedOutputStream(response.getOutputStream());
//从输入流中读出数据，并写入输出流
byte[] buff=new byte[2048];
int bytesRead;
while ((bytesRead=(bis.read(buff,0,buff.length)))!=-1){
bos.write(buff,0,bytesRead);
}
if(bis!=null){
bos.close();
}
if(bos!=null){
bos.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void doGet(HttpServletRequest request ,HttpServletResponse response ){
doPost(request, response);
}
}
运行结果如下：
