java从http url下载文件的简单方法
java从http url下载文件的简单方法
源码如下:
- import java.io.File; import java.net.URL;
- import org.apache.commons.io.FileUtils;
- public class DownloadURLFile {
- /**
- * @param args */
- public static void main(String[] args) {
- String res = downloadFromUrl("http://images.17173.com/2010/www/roll/201003/0301sohu01.jpg","d:/"); System.out.println(res);
- }
- public static String downloadFromUrl(String url,String dir) {
- try {
- URL httpurl = new URL(url); String fileName = getFileNameFromUrl(url);
- System.out.println(fileName); File f = new File(dir + fileName);
- FileUtils.copyURLToFile(httpurl, f); } catch (Exception e) {
- e.printStackTrace(); return "Fault!";
- } return "Successful!";
- }
- public static String getFileNameFromUrl(String url){ String name = new Long(System.currentTimeMillis()).toString() + ".X";
- int index = url.lastIndexOf("/"); if(index > 0){
- name = url.substring(index + 1); if(name.trim().length()>0){
- return name; }
- } return name;
- } }
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