计算程序运行时间 并将毫秒换算成人看得懂的文字 展示形式为时分秒

/*** 计算程序运行时间，展示形式为 时分秒* */public static String computationDiffTime(long startTime, long endTime) {// 差值long diffValue = endTime - startTime;int hour = 1000 * 60 * 60;// 定义小时的计算常量int minute = 1000 * 60;//定义分钟的计算常量int second = 1000;//定义秒的计算常量String resultSize = "";// 格式化小数DecimalFormat df = new DecimalFormat("0.00");if (diffValue / hour >= 1) {resultSize = df.format(diffValue / (float) hour) + "时";} else if (diffValue / minute >= 1) {resultSize = df.format(diffValue / (float) minute) + "分";} else if (diffValue / second >= 1) {resultSize = df.format(diffValue / (float) second) + "秒";} else {resultSize = diffValue + "毫秒";}return resultSize;}/*** 测试* */public static void main(String[] args) {long startTime = System.currentTimeMillis();// 模拟睡眠六秒try {Thread.sleep(6000);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}long endTime = System.currentTimeMillis();System.out.println(computationDiffTime(startTime, endTime));}