javaWeb通过POST来下载文件

package com.http.file;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class PostFile {
public static void main(String[] args) {
try {
URL url =new URL("http://localhost:8080/MyWeb1/images/s2.jpg");
HttpURLConnection conn=(HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setDoInput(true);
InputStream is =conn.getInputStream();
String path="D:/1.jpg";
File file = new File(path);
OutputStream os = new FileOutputStream(file);
byte[] b = new byte[1024];
int len=0;
while((len=is.read(b, 0,b.length))!=-1){
os.write(b,0,b.length);
os.flush();
}
os.close();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}