Java：使用URL下载图片为何图片下载不完全呢？

Question

 import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class Client {
    public static void main(String[] args) {
        try {
            URL url = new URL("http://www.iteye.com/upload/logo/user/1177132/a7159cc1-b11a-3122-9a9d-5183d6c6ba99.jpg");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setConnectTimeout(5 * 1000);
            InputStream inputStream = connection.getInputStream();
            byte[] tmp = new byte[1024];
            int length;
            OutputStream outputStream = new FileOutputStream("E:" + File.separator + "eee.jpg");
            while ((length = inputStream.read(tmp)) != -1) {
                outputStream.write(tmp, 0, length);
            }
            outputStream.close();
            inputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

图片URL：
http://www.iteye.com/upload/logo/user/1177132/a7159cc1-b11a-3122-9a9d-5183d6c6ba99.jpg
图片有3K，但我下载后图片只有2K这是为什么呢？

Answer 1

connection.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"); 在你conn下面加上这段代码 就可以了。