根據URL將文件下載本地

  %@page import=" java .net .*,java.io.*"% %! public 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(); D

   

   

    <%@page import="java.net.*,java.io.*"%>

    <%!

    public 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 ut = 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();

    }

    %>

    <%

    //測試

    String photoUrl = "http://ad4.sina.com.cn/200601/12/43932_750450.jpg";

    String fileName = photoUrl.substring(photoUrl.lastIndexOf("/"));

    String filePath = "d:/ghost/";

    boolean flag = saveUrlAs(photoUrl, filePath + fileName);

    out.println("Run ok!\n

    Get URL file " + flag);

    %>

轉自：http://www.ltesting.net