如何获取以MB为单位的文件大小?

问题描述：

我在服务器上有一个文件，它是一个zip文件. 如何检查文件大小是否大于27 MB?

I have a file on a server and it is a zip file. How to check if the file size is bigger than 27 MB?

File file = new File("U:\intranet_root\intranet\R1112B2.zip");
if (file > 27) {
   //do something
}

答

使用File类的length()方法返回文件的大小(以字节为单位).

Use the length() method of the File class to return the size of the file in bytes.

// Get file from file name
File file = new File("U:\intranet_root\intranet\R1112B2.zip");

// Get length of file in bytes
long fileSizeInBytes = file.length();
// Convert the bytes to Kilobytes (1 KB = 1024 Bytes)
long fileSizeInKB = fileSizeInBytes / 1024;
// Convert the KB to MegaBytes (1 MB = 1024 KBytes)
long fileSizeInMB = fileSizeInKB / 1024;

if (fileSizeInMB > 27) {
  ...
}

您可以将转换合并为一个步骤，但是我试图充分说明这一过程.

You could combine the conversion into one step, but I've tried to fully illustrate the process.

如何获取以MB为单位的文件大小?

相关推荐