1.加载servlet容器
不能使用main方法直接调用
public static boolean httpDownload(String httpUrl, String saveFile) {
// 1.下载网络文件
int byteRead;
URL url;
try {
url = new URL(httpUrl);
} catch (MalformedURLException e1) {
e1.printStackTrace();
return false;
}
try {
//2.获取链接
URLConnection conn = url.openConnection();
//3.输入流
InputStream inStream = conn.getInputStream();
//3.写入文件
FileOutputStream fs = new FileOutputStream(saveFile);
byte[] buffer = new byte[1024];
while ((byteRead = inStream.read(buffer)) != -1) {
fs.write(buffer, 0, byteRead);
}
inStream.close();
fs.close();
return true;
} catch (FileNotFoundException e) {
e.printStackTrace();
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
@Test
public void httpDownload() {
httpDownload("video.zhihuishu/zhs/ablmons/demo/202206/dddee1c446314b84a26c74a8def3c3c7.mp4","E:\\test/22.mp4");
}2.添mon-io依赖
import org.apachemons.io.FileUtils;
import java.io.File;
import java.net.URL;
public class TestDownloadFile {
public static void main(String[] args) throws Exception{
String urlStr = "https://img2022blogs/i-beta/1278703/202211/1278703-20221128121650595-812419505.png";
URL url = new URL(urlStr);
String tempFileName = "E://a.png";
File temp = new File(tempFileName);
FileUtils.copyURLToFile(url, temp);
}
}








