运用httpClient下载url类型的网页文件
public class IrisTest {

public static void main(String[] args) {

try
{

HttpClient client = new HttpClient();
String fullAbsolutePath;

String dateString = new SimpleDateFormat("yyMMdd").format(new Date());
//ACConstant.PATH_UPLOAD
String folderRelativePath = "uploads"+ "/" + "selectArea"
+ "/" + dateString + "/";
//Constant.SYSTEM_ROOT_PATH +
String folderAbsolutePath = "D://workspace//AppCreate//WebContent//" + folderRelativePath;
File folder = new File(folderAbsolutePath);
if (!folder.exists()) {
folder.mkdirs();
}
String fileName = new DecimalFormat("00000000").format(Math.random()*100000000)
+ "." + "png";
fullAbsolutePath = folderAbsolutePath + fileName;

GetMethod get = new GetMethod("http://t1.gstatic.com/images?q=tbn:ANd9GcTPr8WmmQhUfQmVZ51p1pAkfdes_FvQCyOWRt-7fhnZj3KZ9jIGhpelAJ6B");
int i = client.executeMethod(get);
if (200 == i)
{

File file = new File(fullAbsolutePath);
if (file.exists()) {
file.delete();
}
//File storeFile = new File("c:/bobs.png");
FileOutputStream output = new FileOutputStream(file);
// 得到网络资源的字节数组,并写入文件
output.write(get.getResponseBody());
output.close();
}else
{
System.out.println("no pic");
}
} catch ( Exception e )
{
System.out.println("no pic");
}



}


}