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Commit d4c8f46a authored by ysongq's avatar ysongq
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jz-dm-common/src/main/java/com/jz/common/utils/DateUtil.java 0 → 100644
View file @ d4c8f46a
package com.changgou.util;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
/***
*
* @Author:shenkunlin
* @Description:itheima
* @date: 2019/5/7 13:07
*
****/
public class DateUtil {
//时间格式
public static final String PATTERN_YYYYMMDDHH = "yyyyMMddHH";
public static final String PATTERN_YYYY_MM_DDHHMMSS = "yyyy-MM-dd HH:mm:ss";
/***
* 从yyyy-MM-dd HH:mm格式转成yyyyMMddHH格式
* @param dateStr
* @return
*/
public static String formatStr(String dateStr,String opattern,String npattern){
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(opattern);
try {
Date date = simpleDateFormat.parse(dateStr);
simpleDateFormat = new SimpleDateFormat(npattern);
return simpleDateFormat.format(date);
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
/***
* 获取指定日期的凌晨
* @return
*/
public static Date toDayStartHour(Date date){
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
Date start = calendar.getTime();
return start;
}
/***
* 时间增加N分钟
* @param date
* @param minutes
* @return
*/
public static Date addDateMinutes(Date date,int minutes){
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.MINUTE, minutes);// 24小时制
date = calendar.getTime();
return date;
}
/***
* 时间递增N小时
* @param hour
* @return
*/
public static Date addDateHour(Date date,int hour){
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.HOUR, hour);// 24小时制
date = calendar.getTime();
return date;
}
/***
* 获取时间菜单
* @return
*/
public static List<Date> getDateMenus(){
//定义一个List<Date>集合，存储所有时间段
List<Date> dates = getDates(12);
//判断当前时间属于哪个时间范围
Date now = new Date();
for (Date cdate : dates) {
//开始时间<=当前时间<开始时间+2小时
if(cdate.getTime()<=now.getTime() && now.getTime()<addDateHour(cdate,2).getTime()){
now = cdate;
break;
}
}
//当前需要显示的时间菜单
List<Date> dateMenus = new ArrayList<Date>();
for (int i = 0; i <5 ; i++) {
dateMenus.add(addDateHour(now,i*2));
}
return dateMenus;
}
/***
* 指定时间往后N个时间间隔
* @param hours
* @return
*/
public static List<Date> getDates(int hours) {
List<Date> dates = new ArrayList<Date>();
//循环12次
Date date = toDayStartHour(new Date()); //凌晨
for (int i = 0; i <hours ; i++) {
//每次递增2小时,将每次递增的时间存入到List<Date>集合中
dates.add(addDateHour(date,i*2));
}
return dates;
}
/***
* 时间转成yyyyMMddHH
* @param date
* @param pattern
* @return
*/
public static String data2str(Date date, String pattern){
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(pattern);
return simpleDateFormat.format(date);
}
}
jz-dm-common/src/main/java/com/jz/common/utils/IdWorker.java 0 → 100644
View file @ d4c8f46a
package com.changgou.util;
import java.lang.management.ManagementFactory;
import java.net.InetAddress;
import java.net.NetworkInterface;
/**
* <p>名称：IdWorker.java</p>
* <p>描述：分布式自增长ID</p>
* <pre>
* Twitter的 Snowflake　JAVA实现方案
* </pre>
* 核心代码为其IdWorker这个类实现，其原理结构如下，我分别用一个0表示一位，用—分割开部分的作用：
* 1||0---0000000000 0000000000 0000000000 0000000000 0 --- 00000 ---00000 ---000000000000
* 在上面的字符串中，第一位为未使用（实际上也可作为long的符号位），接下来的41位为毫秒级时间，
* 然后5位datacenter标识位，5位机器ID（并不算标识符，实际是为线程标识），
* 然后12位该毫秒内的当前毫秒内的计数，加起来刚好64位，为一个Long型。
* 这样的好处是，整体上按照时间自增排序，并且整个分布式系统内不会产生ID碰撞（由datacenter和机器ID作区分），
* 并且效率较高，经测试，snowflake每秒能够产生26万ID左右，完全满足需要。
* <p>
* 64位ID (42(毫秒)+5(机器ID)+5(业务编码)+12(重复累加))
*
* @author Polim
*/
public class IdWorker {
// 时间起始标记点，作为基准，一般取系统的最近时间（一旦确定不能变动）
private final static long twepoch = 1288834974657L;
// 机器标识位数
private final static long workerIdBits = 5L;
// 数据中心标识位数
private final static long datacenterIdBits = 5L;
// 机器ID最大值
private final static long maxWorkerId = -1L ^ (-1L << workerIdBits);
// 数据中心ID最大值
private final static long maxDatacenterId = -1L ^ (-1L << datacenterIdBits);
// 毫秒内自增位
private final static long sequenceBits = 12L;
// 机器ID偏左移12位
private final static long workerIdShift = sequenceBits;
// 数据中心ID左移17位
private final static long datacenterIdShift = sequenceBits + workerIdBits;
// 时间毫秒左移22位
private final static long timestampLeftShift = sequenceBits + workerIdBits + datacenterIdBits;
private final static long sequenceMask = -1L ^ (-1L << sequenceBits);
/* 上次生产id时间戳 */
private static long lastTimestamp = -1L;
// 0，并发控制
private long sequence = 0L;
private final long workerId;
// 数据标识id部分
private final long datacenterId;
public IdWorker(){
this.datacenterId = getDatacenterId(maxDatacenterId);
this.workerId = getMaxWorkerId(datacenterId, maxWorkerId);
}
/**
* @param workerId
* 工作机器ID
* @param datacenterId
* 序列号
*/
public IdWorker(long workerId, long datacenterId) {
if (workerId > maxWorkerId || workerId < 0) {
throw new IllegalArgumentException(String.format("worker Id can't be greater than %d or less than 0", maxWorkerId));
}
if (datacenterId > maxDatacenterId || datacenterId < 0) {
throw new IllegalArgumentException(String.format("datacenter Id can't be greater than %d or less than 0", maxDatacenterId));
}
this.workerId = workerId;
this.datacenterId = datacenterId;
}
/**
* 获取下一个ID
*
* @return
*/
public synchronized long nextId() {
long timestamp = timeGen();
if (timestamp < lastTimestamp) {
throw new RuntimeException(String.format("Clock moved backwards. Refusing to generate id for %d milliseconds", lastTimestamp - timestamp));
}
if (lastTimestamp == timestamp) {
// 当前毫秒内，则+1
sequence = (sequence + 1) & sequenceMask;
if (sequence == 0) {
// 当前毫秒内计数满了，则等待下一秒
timestamp = tilNextMillis(lastTimestamp);
}
} else {
sequence = 0L;
}
lastTimestamp = timestamp;
// ID偏移组合生成最终的ID，并返回ID
long nextId = ((timestamp - twepoch) << timestampLeftShift)
| (datacenterId << datacenterIdShift)
| (workerId << workerIdShift) | sequence;
return nextId;
}
private long tilNextMillis(final long lastTimestamp) {
long timestamp = this.timeGen();
while (timestamp <= lastTimestamp) {
timestamp = this.timeGen();
}
return timestamp;
}
private long timeGen() {
return System.currentTimeMillis();
}
/**
* <p>
* 获取 maxWorkerId
* </p>
*/
protected static long getMaxWorkerId(long datacenterId, long maxWorkerId) {
StringBuffer mpid = new StringBuffer();
mpid.append(datacenterId);
String name = ManagementFactory.getRuntimeMXBean().getName();
if (!name.isEmpty()) {
/*
* GET jvmPid
*/
mpid.append(name.split("@")[0]);
}
/*
* MAC + PID 的 hashcode 获取16个低位
*/
return (mpid.toString().hashCode() & 0xffff) % (maxWorkerId + 1);
}
/**
* <p>
* 数据标识id部分
* </p>
*/
protected static long getDatacenterId(long maxDatacenterId) {
long id = 0L;
try {
InetAddress ip = InetAddress.getLocalHost();
NetworkInterface network = NetworkInterface.getByInetAddress(ip);
if (network == null) {
id = 1L;
} else {
byte[] mac = network.getHardwareAddress();
id = ((0x000000FF & (long) mac[mac.length - 1])
| (0x0000FF00 & (((long) mac[mac.length - 2]) << 8))) >> 6;
id = id % (maxDatacenterId + 1);
}
} catch (Exception e) {
System.out.println(" getDatacenterId: " + e.getMessage());
}
return id;
}
public static void main(String[] args) {
//推特 26万个不重复的ID
IdWorker idWorker = new IdWorker(0,0);
for (int i = 0; i <2600 ; i++) {
System.out.println(idWorker.nextId());
}
}
}
\ No newline at end of file
jz-dm-common/src/main/java/com/jz/common/utils/Page.java 0 → 100644
View file @ d4c8f46a
package com.changgou.util;
import java.io.Serializable;
import java.util.List;
/*****
* @Author: 黑马训练营
* @Description: com.changgou.util
****/
public class Page <T> implements Serializable {
// 页数（第几页）
private long currentpage;
// 查询数据库里面对应的数据有多少条
private long total;// 从数据库查处的总记录数
// 每页查5条
private int size;
// 下页
private int next;
private List<T> list;
// 最后一页
private int last;
private int lpage;
private int rpage;
//从哪条开始查
private long start;
//全局偏移量 6 7 8 9 10 11 12 13 14
public int offsize = 2;
public Page() {
super();
}
/****
*
* @param currentpage
* @param total
* @param pagesize
*/
public void setCurrentpage(long currentpage,long total,long pagesize) {
//可以整除的情况下
long pagecount = total/pagesize;
//如果整除表示正好分N页，如果不能整除在N页的基础上+1页
int totalPages = (int) (total%pagesize==0? total/pagesize : (total/pagesize)+1);
//总页数
this.last = totalPages;
//判断当前页是否越界,如果越界，我们就查最后一页
if(currentpage>totalPages){
this.currentpage = totalPages;
}else{
this.currentpage=currentpage;
}
//计算start
this.start = (this.currentpage-1)*pagesize;
}
//上一页
public long getUpper() {
return currentpage>1? currentpage-1: currentpage;
}
//总共有多少页，即末页
public void setLast(int last) {
this.last = (int) (total%size==0? total/size : (total/size)+1);
}
/****
* 带有偏移量设置的分页
* @param total
* @param currentpage
* @param pagesize
* @param offsize
*/
public Page(long total,int currentpage,int pagesize,int offsize) {
this.offsize = offsize;
initPage(total, currentpage, pagesize);
}
/****
*
* @param total 总记录数
* @param currentpage 当前页
* @param pagesize 每页显示多少条
*/
public Page(long total,int currentpage,int pagesize) {
initPage(total,currentpage,pagesize);
}
/****
* 初始化分页
* @param total
* @param currentpage
* @param pagesize
*/
public void initPage(long total,int currentpage,int pagesize){
//总记录数
this.total = total;
//每页显示多少条
this.size=pagesize;
//计算当前页和数据库查询起始值以及总页数
setCurrentpage(currentpage, total, pagesize);
//分页计算
int leftcount =this.offsize, //需要向上一页执行多少次
rightcount =this.offsize;
//起点页
this.lpage =currentpage;
//结束页
this.rpage =currentpage;
//2点判断
this.lpage = currentpage-leftcount; //正常情况下的起点
this.rpage = currentpage+rightcount; //正常情况下的终点
//页差=总页数和结束页的差
int topdiv = this.last-rpage; //判断是否大于最大页数
/***
* 起点页
* 1、页差<0 起点页=起点页+页差值
* 2、页差>=0 起点和终点判断
*/
this.lpage=topdiv<0? this.lpage+topdiv:this.lpage;
/***
* 结束页
* 1、起点页<=0 结束页=|起点页|+1
* 2、起点页>0 结束页
*/
this.rpage=this.lpage<=0? this.rpage+(this.lpage*-1)+1: this.rpage;
/***
* 当起点页<=0 让起点页为第一页
* 否则不管
*/
this.lpage=this.lpage<=0? 1:this.lpage;
/***
* 如果结束页>总页数 结束页=总页数
* 否则不管
*/
this.rpage=this.rpage>last? this.last:this.rpage;
}
public long getNext() {
return currentpage<last? currentpage+1: last;
}
public void setNext(int next) {
this.next = next;
}
public long getCurrentpage() {
return currentpage;
}
public long getTotal() {
return total;
}
public void setTotal(long total) {
this.total = total;
}
public long getSize() {
return size;
}
public void setSize(int size) {
this.size = size;
}
public long getLast() {
return last;
}
public long getLpage() {
return lpage;
}
public void setLpage(int lpage) {
this.lpage = lpage;
}
public long getRpage() {
return rpage;
}
public void setRpage(int rpage) {
this.rpage = rpage;
}
public long getStart() {
return start;
}
public void setStart(long start) {
this.start = start;
}
public void setCurrentpage(long currentpage) {
this.currentpage = currentpage;
}
/**
* @return the list
*/
public List<T> getList() {
return list;
}
/**
* @param list the list to set
*/
public void setList(List<T> list) {
this.list = list;
}
}
\ No newline at end of file
jz-dm-common/src/main/java/com/jz/common/utils/PageResult.java 0 → 100644
View file @ d4c8f46a
package com.changgou.util;
import java.util.List;
/**
* 分页结果类
*/
public class PageResult<T> {
private Long total;//总记录数
private List<T> rows;//记录
public PageResult(Long total, List<T> rows) {
this.total = total;
this.rows = rows;
}
public PageResult() {
}
public Long getTotal() {
return total;
}
public void setTotal(Long total) {
this.total = total;
}
public List<T> getRows() {
return rows;
}
public void setRows(List<T> rows) {
this.rows = rows;
}
}
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