请将这段C语言转为java语言while ((data_size = fread(&buff, 1, 1, file)) == 1)

void readFile(String filePath) {
int dataSize;
byte[] data = new byte[1024];
FileInputStream fileInputStream = null;
try {
fileInputStream = new FileInputStream(filePath);
while ((dataSize = fileInputStream.read(data)) != -1) {
// do something with the data
}
fileInputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}