java实现从RUI获取文件并保存本地（实用方法）

import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.URL; import java.net.URLConnection; /** * @{#} Test.java Create on Mar 5, 2010 10:21:24 AM * * Copyright (c) 2010 by shilm. * @author <a href="mailto:feizaisky@gmail.com">shilm</a> * @version 1.0 */ public class Test { public static void main(String[] args) { String str = getFileFromURL("http://blog.shilimin.com/wp-content/gallery/talou/dsc_0284.jpg", "E://data//image//", "dsc_0284.jpg"); System.out.println(str); } /** * @param urlString * 文件网络地址 * @param fileDir * 本地存储目录 * @param fileName * 本地存储文件名 * @return 文件在本地存储的全路径 */ public static String getFileFromURL(String urlString, String fileDir, String fileName) { String filePath = fileDir + fileName; File dirPath = new File(fileDir); if (!dirPath.exists()) { dirPath.mkdirs(); } InputStream is = null; OutputStream os = null; try { URL url = new URL(urlString); URLConnection conn = url.openConnection(); is = conn.getInputStream(); os = new FileOutputStream(filePath); byte[] b = new byte[512]; int len = 0; while ((len = is.read(b)) != -1) { os.write(b, 0, len); } } catch (Exception e) { e.printStackTrace(); } finally { if (is != null) { try { is.close(); } catch (IOException e) { ; } } if (os != null) { try { os.close(); } catch (IOException e) { ; } } } return filePath; } }