指定日期与时间段生成随机时间
参考文章：www.sharejs.com/codes/java/5918
代码和注释如下：
package com.example.demo;
import java.util.Date;
import java.text.SimpleDateFormat;
public class Test {
public static void main(String []args) {
//设置时间格式
SimpleDateFormat sdfDate = new SimpleDateFormat("yyyy/MM/dd");
SimpleDateFormat sdfTime = new SimpleDateFormat(" HH:mm:ss");
//指定日期范围和时间范围
long date =randomDate("2017/01/01","2017/12/01");
long time =randomTime("09:00:00","17:00:00");
String createtime = sdfDate.format(date) + sdfTime.format(time);
System.out.println(createtime);
}
/**
*生成随机日期
*@param beginDate起始日期
*@param endDate结束日期
*@return
*/
public static long randomDate(String beginDate, String endDate){
try{
SimpleDateFormat format =new SimpleDateFormat("yyyy/MM/dd");
Date start = format.parse(beginDate);
Date end = format.parse(endDate);
if(start.getTime() >= end.getTime()){
return-1;
}
long date =random(start.getTime(),end.getTime());
return date;
}catch(Exception e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
return-1;
}
/**
*生成范围内的随机数
*@param begin
*@param end
*@return
*/
public static longrandom(longbegin,longend){
long rtnn = begin + (long)(Math.random() * (end - begin));
if(rtnn==begin || rtnn==end){
return random(begin,end);
}
return rtnn;
}
/**
* 生成随机时间
*@param beginTime起始时间
*@param endTime结束时间
*@return
*/
public static long randomTime(String beginTime, String endTime){
try{
SimpleDateFormat format =new SimpleDateFormat("HH:mm:ss");
Date start = format.parse(beginTime);
Date end = format.parse(endTime);
if(start.getTime() >= end.getTime()){
return-1;
}
long date =random(start.getTime(),end.getTime());
return date;
}catch(Exception e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
return-1;
}
}
