/**
* 根据地址获得数据的字节流并转换成大小
* @param strUrl 网络连接地址
* @return
*/
public static String getFileSizeByUrl(String strUrl){
InputStream inStream=null;
ByteArrayOutputStream outStream=null;
String size="";
try {
URL url = new URL(strUrl);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(5 * 1000);
inStream = conn.getInputStream();
outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while( (len=inStream.read(buffer)) != -1 ){
outStream.write(buffer, 0, len);
}
byte[] bt = outStream.toByteArray();
if(null != bt && bt.length > 0){
DecimalFormat df = new DecimalFormat("#.00");
if (bt.length < 1024) {
size = df.format((double) bt.length) + "BT";
} else if (bt.length < 1048576) {
size = df.format((double) bt.length / 1024) + "KB";
} else if (bt.length < 1073741824) {
size = df.format((double) bt.length / 1048576) + "MB";
} else {
size = df.format((double) bt.length / 1073741824) +"GB";
}
System.out.println("文件大小=：" + size);
}else{
System.out.println("没有从该连接获得内容");
}
inStream.close();
outStream.close();
} catch (Exception e) {
e.printStackTrace();
}finally{
try{
if(inStream !=null){
inStream.close();
}
if(outStream !=null){
outStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return size;
}```
