这篇文章主要介绍了JSP实现远程文件下载保存到服务器指定目录中的方法,涉及JSP文件传输及目录操作的相关技巧,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了JSP实现远程文件下载保存到服务器指定目录中的方法。分享给大家供大家参考,具体如下:
- <%@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 = "C:/test/";
- boolean flag = saveUrlAs(photoUrl, filePath + fileName);
- out.println("Run ok!/n<BR>Get URL file " + flag);
- %>
希望本文所述对大家JSP程序设计有所帮助。
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