java 下载远程图片

package test;

import java.io.File;
import java.net.URL;

import org.apache.commons.io.FileUtils;

public class UploadImg {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String url="http://www.baidu.com/img/baidu_sylogo1.gif";
		downloadFromUrl(url,"D:/aa/");
		System.out.println("ok");
	}
	/**
	 * 文件下载的方法
	 * @param String url
	 * @param String dir
	 * @return String fileName
	 */
	public static String downloadFromUrl(String url, String dir) {
		String fileName="";
		try {
			URL httpurl = new URL(url);
		//	fileName = getFileNameFromUrl(url);
			String[] us=url.split("/");
			fileName=us[us.length-1];
			System.out.println("fileName:"+fileName);
			File f = new File(dir + fileName);
			FileUtils.copyURLToFile(httpurl, f);
		} catch (Exception e) {
			e.printStackTrace();
			return "Fault!";
		}
		return fileName;
	}
}