//字节大小,K,M,G public static final long KB = 1024; public static final long MB = KB * 1024; public static final long GB = MB * 1024; /** * 文件字节大小显示成M,G和K * @param size * @return */ public static String displayFileSize(long size) { if (size >= GB) { return String.format("%.1f GB", (float) size / GB); } else if (size >= MB) { float value = (float) size / MB; return String.format(value > 100 ? "%.0f MB" : "%.1f MB", value); } else if (size >= KB) { float value = (float) size / KB; return String.format(value > 100 ? "%.0f KB" : "%.1f KB", value); } else { return String.format("%d B", size); } }