数字、时间等单位换算工具类收集

public static String bytes2kb(long bytes) { BigDecimal filesize = new BigDecimal(bytes); BigDecimal megabyte = new BigDecimal(1024 * 1024); float returnValue = filesize.divide(megabyte, 2, BigDecimal.ROUND_UP) .floatValue(); if (returnValue > 1) return (returnValue + "MB"); BigDecimal kilobyte = new BigDecimal(1024); returnValue = filesize.divide(kilobyte, 2, BigDecimal.ROUND_UP) .floatValue(); return (returnValue + "KB"); } 12345678910111213