Java 從服務器下載文件到本地


運行main方法即可運行。。。


package com.Manage.control;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

public class aatest {
public static boolean saveUrlAs(String photoUrl, String fileName) {
//此方法只能用戶HTTP協議
try {
URL url = new URL(photoUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
DataInputStream in = new DataInputStream(connection.getInputStream());
DataOutputStream out = new DataOutputStream(new FileOutputStream(fileName));
byte[] buffer = new byte[4096];
int count = 0;
while ((count = in.read(buffer)) > 0) {
out.write(buffer, 0, count);
}
out.close();
in.close();
return true;
}
catch (Exception e) {
return false;
}
}

public String getDocumentAt(String urlString) {
//此方法兼容HTTP和FTP協議
StringBuffer document = new StringBuffer();
try {
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.
getInputStream()));
String line = null;
while ( (line = reader.readLine()) != null) {
document.append(line + "/n");
}
reader.close();
}
catch (MalformedURLException e) {
System.out.println("Unable to connect to URL: " + urlString);
}
catch (IOException e) {
System.out.println("IOException when connecting to URL: " + urlString);
}
return document.toString();
}

public static void main(String[] args) {


String photoUrl = "https://ss0.bdstatic.com/5aV1bjqh_Q23odCf/static/superman/img/logo/bd_logo1_31bdc765.png";
String fileName = photoUrl.substring(photoUrl.lastIndexOf("/"));
String filePath = "d:/";
boolean flag = saveUrlAs(photoUrl, filePath + fileName);
System.out.println("Run ok!/n<BR>Get URL file " + flag);

}
}



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