Java:使用URL下载图片为何图片下载不完全呢?
本文介绍了Java:使用URL下载图片为何图片下载不完全呢?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
问 题
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/l...
图片有3K,但我下载后图片只有2K而且图片是错误的这是为什么呢?
解决方案
你把代码改成这样试试
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.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.19 Safari/537.36");
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();
}
}
}
不添加UA下载下来的文件其实是这样的
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