long startTime = System.currentTimeMillis();
//执行方法
long endTime = System.currentTimeMillis();
float excTime = (float) (endTime - startTime) / 1000;
System.out.println("执行时间:" + excTime + "s");
long startTime = System.currentTimeMillis();
//执行方法
long endTime = System.currentTimeMillis();
float excTime = (float) (endTime - startTime) / 1000;
System.out.println("执行时间:" + excTime + "s");