JAVA计算文件大小返回GB,TB,MB_YANG杰杰杰杰杰杰

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JAVA计算文件大小返回GB,TB,MB

(2018-03-07 10:05:11)

分类： java

package com.cscm.cf.countsize;

import java.io.File;

import java.text.DecimalFormat;

public class countSize {

public static void main(String[] args) {

String path = "D:\\TestArea\\HW_20180304.zipold";

System.out.println("文件大小为："+GetFileSize(new File(path)));

}

public static String GetFileSize(File file){

String size = "";

if(file.exists() && file.isFile()){

long fileS = file.length();

DecimalFormat df = new DecimalFormat("#.00");

if (fileS < 1024) {

size = df.format((double) fileS) + "BT";

} else if (fileS < 1048576) {

size = df.format((double) fileS / 1024) + "KB";

} else if (fileS < 1073741824) {

size = df.format((double) fileS / 1048576) + "MB";

} else {

size = df.format((double) fileS / 1073741824) +"GB";

}

}else if(file.exists() && file.isDirectory()){

size = "";

}else{

size = "0BT";

}

return size;

}

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