本文實例為大家分享了Java讀取并下載網絡文件的具體代碼，供大家參考，具體內容如下
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import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;/** * Java讀取并下載網絡文件 * @author Marydon * @createTime 2017年8月18日下午5:24:09 * @updateTime * @Email:marydon2017@163.com * @version:1.0.0 * @referenceLink * <a href="http://blog.csdn.net/xb12369/article/details/40543649/"> java 從網絡Url中下載文件</a> */public class DownloadFromNetwork { /** * 從網絡Url中下載文件 * @param urlStr * @param fileName * @param savePath * @throws IOException */ public static void downLoadFromUrl(String urlStr,String fileName,String savePath) throws IOException{ URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); //設置超時間為3秒 conn.setConnectTimeout(3*1000); //防止屏蔽程序抓取而返回403錯誤 conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"); //得到輸入流 InputStream inputStream = conn.getInputStream(); //獲取自己數組 byte[] getData = readInputStream(inputStream); //文件保存位置 File saveDir = new File(savePath); if(!saveDir.exists()){ saveDir.mkdirs(); } File file = new File(saveDir+File.separator+fileName); FileOutputStream fos = new FileOutputStream(file); fos.write(getData); if(fos!=null){ fos.close(); } if(inputStream!=null){ inputStream.close(); } System.out.println("info:"+url+" download success"); } /** * 從輸入流中獲取字節數組 * @param inputStream * @return * @throws IOException */ public static byte[] readInputStream(InputStream inputStream) throws IOException { byte[] buffer = new byte[1024]; int len = 0; ByteArrayOutputStream bos = new ByteArrayOutputStream(); while((len = inputStream.read(buffer)) != -1) { bos.write(buffer, 0, len); } bos.close(); return bos.toByteArray(); } public static void main(String[] args) { try{ for (int i = 201; i <=520; i++) { downLoadFromUrl("https://ss1.bdstatic.com/kvoZeXSm1A5BphGlnYG/skin/" + i + ".jpg",i + ".jpg","E:/Downloads/wallpaper/baiduSkin"); } }catch (Exception e) { // TODO: handle exception } } } |
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：http://www.cnblogs.com/Marydon20170307/p/7402871.html
