硬盘大小格式转换(自记)

public static String conDouble(long val, String ex) {

long dividend=1024l;//被除数

if (!"".equals(ex) && null != ex) {

ex = ex.toUpperCase(); // 转换大小

if ("KB".equals(ex)) {

if (val < dividend) {return "0."+val + "KB";}

if (val % dividend > 0) {return val / dividend + "." + (val % dividend) + "KB";}

return val / 1024 + "KB";

} else if ("MB".equals(ex)) {

dividend=(long)Math.pow(dividend, 2);

if(val < (dividend)){return "0."+val + "MB";}

if (val % (dividend) > 0) {return val / (dividend) + "." + (val % (dividend)) + "MB";}

return val / (dividend) + "MB";

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} else if ("GB".equals(ex)) {

dividend=(long)Math.pow(dividend, 3);

if(val < (dividend)){return "0."+val + "GB";}

if (val % (dividend) > 0) {return val / (dividend) + "." + (val % (dividend)) + "GB";}

return val / (dividend) + "GB";

} else if ("TB".equals(ex)) {//1099511627776

dividend=(long)Math.pow(dividend, 4);

if(val < (dividend)){return "0."+val + "TB";}

if (val % (dividend) > 0) {return val / (dividend) + "." + (val % (dividend)) + "TB";}

return val / (dividend) + "TB";

}

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}

return val + "";

}