功能：输入图片URL地址和图片名字，输出下载图片到指定目录。参考代码如下：
import java.io.DataInputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.net.URL;public static void downloadImage(String Imageurl,String filename) throws IOException{System.getProperties().setProperty("http.proxyHost", "IP");//设置代理System.getProperties().setProperty("http.proxyPort", "Port");URL url = new URL(Imageurl);//打开网络输入流DataInputStream dis = new DataInputStream(url.openStream());String newImageName="D://tmp//"+filename+".jpg";//建立一个新的文件FileOutputStream fos = new FileOutputStream(new File(newImageName));byte[] buffer = new byte[1024];int length;//开始填充数据while((length = dis.read(buffer))>0){fos.write(buffer,0,length);}dis.close();fos.close();}i
