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  • 部落首页 > 程序开发 > JAVA专栏 > 正文
  • 从URL获取文件保存到本地的代码
      2007-3-18  来源:网络资源  编辑:Jsbulo  热度:

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

      <%!

       public boolean saveUrlAs(String photoUrl, String fileName) {

      //此方法只能用户HTTP协议

       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协议

       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();

       }

      %>

      <%

      //测试

       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);

      %>