DateHandler日期处理工具(JSP中使用后台工具类)

1.DateHandler.java

package Utils.dateHandler;


import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateHandler {
    
    /**
     * 改变日期为String类型：格式为yyyy-MM-dd
     * @param date 日期
     * @return String类型的转换结果
     */
    public static String dateToString(Date date) {
        String sdate = "";
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
        if(date != null) {
            sdate = formatter.format(date);
        }
        return sdate;
    }
    
    /**
     * 改变日期为String类型：格式为yyyy-MM-dd HH:mm
     * @param date 日期
     * @return String类型的转换结果
     */
    public static String dateToStringHourMinute(Date date) {
        String sdate = "";
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm");
        if(sdate != null) {
            sdate = formatter.format(date);
        }
        return sdate;
    }
    
    /**
     * 改变日期为String类型：格式自定义
     * @param date 日期
     * @param format 格式
     * @return String类型的转换结果
     */
    public static String dateToString(Date date, String format) {
        String sdate = "";
        SimpleDateFormat formatter = new SimpleDateFormat(format);
        if(sdate != null) {
            sdate = formatter.format(date);
        }
        return sdate;
    }
    
    /**
     * 改变String记录的日期为java.util.Date类型
     * @param date String类型日期
     * @return Date类型转换结果
     * @throws ParseException
     */
    public static Date changeStringToDate(String date) throws ParseException {
        Date t = null;
        if((date != null) && (!date.trim().equals(""))) {
            try {
                SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
                t = formatter.parse(date);
            } catch(ParseException ex) {
                ex.printStackTrace();
                throw new RuntimeException(ex);
            }
        }
        return t;
    }
    
    /**
     * 改变String记录的日期为java.util.Date类型，格式自定义
     * @param date String类型日期
     * @param format 自定义格式模板
     * @return Date类型日期转换结果
     * @throws ParseException
     */
    public static Date changeStringToDate(String date, String format) throws ParseException {
        Date t = null;
        if((date != null) && (!date.trim().equals(""))) {
            try {
                SimpleDateFormat formatter = new SimpleDateFormat(format);
                t = formatter.parse(date);
            } catch(ParseException ex) {
                ex.printStackTrace();
                throw new RuntimeException(ex);
            }
        }
        return t;
    }
}

 2.使用:

package Utils.dateHandler;

import java.text.ParseException;
import java.util.Date;

import org.junit.Test;

public class Test111 {

    @Test
    public void test1() throws ParseException{
        System.out.println(DateHandler.dateToString(new Date()));
        System.out.println(DateHandler.dateToString(new Date(), "yyyy-MM-dd hh:mm:ss"));
        System.out.println(DateHandler.dateToStringHourMinute(new Date()));
        System.out.println(DateHandler.changeStringToDate("1900-05-06"));
        System.out.println(DateHandler.changeStringToDate("1925-02-20 15:25:30","yyyy-MM-dd hh:mm:ss" ));
    }
}

2017-09-16
2017-09-16 11:15:10
2017-09-16 11:15
Sun May 06 00:00:00 CST 1900
Fri Feb 20 15:25:30 CST 1925

也可以在JSP页面中使用该工具类:比如：

JSP中引入该类:

<%@ page import="java.util.*,Utils.DateHandler" %>

文本框中取服务器当前时间:

<input class="form-control" value="<%= DateHandler.dateToString(new Date()) %>"  />

结果:

--------------------------------------------------------------------------

更全的日期工具类:

DateHandler.java

package com.tyust.common;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

import org.junit.Test;

public class DateHandler {
    /**
     * 把一个日期转换成指定格式的字符串
     * @param time
     * @return
     */
    public static String dateToString(Date time) {
        String ctime = "";
        SimpleDateFormat formatter;
        formatter = new SimpleDateFormat("yyyy-MM-dd");
        if (time != null) {
            ctime = formatter.format(time);
        }
        return ctime;
    }
    
    public static String dateToStringHourMinute(Date time) {
        String ctime = "";
        SimpleDateFormat formatter;
        formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm");
        if (time != null) {
            ctime = formatter.format(time);
        }
        return ctime;
    }
    // 把String转换成Date
    public static Date changeStringToDate(String time) throws ParseException {
        Date t = null;
        if (time != null && !time.trim().equals("")) {
            try {
                SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
                t= formatter.parse(time);
            } catch (ParseException e) {
                e.printStackTrace();
                throw new java.lang.RuntimeException(e);
            }
        }
        return t;
    }
    // 把String转换成Date如：2010-01-07 13:10:10,yyyy-MM-dd HH:mm:ss
    public static Date changeStringToDate(String time,String fomat) throws ParseException {
        Date t = null;
        if (time != null && !time.trim().equals("")) {
            try {
                SimpleDateFormat formatter = new SimpleDateFormat(fomat);
                t= formatter.parse(time);
            } catch (ParseException e) {
                e.printStackTrace();
                throw new java.lang.RuntimeException(e);
            }
        }
        return t;
    }
    //把Date转换成String如：2010-01-07 13:10:10
    public static String dateToString(Date time,String fomat) {
        String ctime = "";
        SimpleDateFormat formatter = new SimpleDateFormat(fomat);
        if (time != null) {
            ctime = formatter.format(time);
        }
        return ctime;
    }
 
    /**
     * 获得下季度第一天 
     * @author zxg
     * @param month
     * @return
     */
    public static Date getNextSeasonFirstDay(int month){ 
           int array[][] = {{1,2,3},{4,5,6},{7,8,9},{10,11,12}}; 
           int season = 1; 
           if(month>=1&&month<=3){ 
               season = 2; 
           } 
           if(month>=4&&month<=6){ 
               season = 3; 
           } 
           if(month>=7&&month<=9){ 
               season = 4; 
           } 
           if(month>=10&&month<=12){ 
               season = 1; 
           } 
           int start_month = array[season-1][0]; 
            
           Date date = new Date(); 
           SimpleDateFormat   dateFormat   =   new   SimpleDateFormat("yyyy");//可以方便地修改日期格式    
           String  years  = dateFormat.format(date);    
           int years_value = Integer.parseInt(years); 
           if(month>=10&&month<=12){
               years_value++;
           }
           int start_days =1;//years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month); 
           String seasonDateStr = years_value+"-"+start_month+"-"+start_days; 
           Date seasonDate=new Date();
            try {
                seasonDate = changeStringToDate(seasonDateStr);
            } catch (ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
           return seasonDate; 
            
       } 
    /**
     * 获得季度的第一天和最后一天
     * @author zxg
     * @param month
     * @param isThisSeason:
     *             (1)true:本季度第一天和最后一天
     *             (2)false:上季度第一天和最后一天
     * @return
     */
    public static String getSeasonFirstEndDay(int month,boolean isThisSeason){ 
        int array[][] = {{1,2,3},{4,5,6},{7,8,9},{10,11,12}}; 
        int season = 1; 
        if(month>=1&&month<=3){ 
            if(isThisSeason){
                   season = 1; 
               }else{
                   season = 4;
               } 
        } 
        if(month>=4&&month<=6){ 
            if(isThisSeason){
                   season = 2; 
               }else{
                   season = 1;
               } 
        } 
        if(month>=7&&month<=9){ 
            if(isThisSeason){
                   season = 3; 
               }else{
                   season = 2;
               } 
        } 
        if(month>=10&&month<=12){ 
            if(isThisSeason){
                   season = 4; 
               }else{
                   season = 3;
               } 
        } 
        int start_month = array[season-1][0]; 
        int end_month = array[season-1][2]; 
         
        Date date = new Date(); 
        SimpleDateFormat   dateFormat   =   new   SimpleDateFormat("yyyy");//可以方便地修改日期格式    
        String  years  = dateFormat.format(date);    
        int years_value = Integer.parseInt(years); 
        if(month>=1&&month<=3&&!isThisSeason){
            years_value--;
        }
        int start_days =1;//years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month); 
        int end_days = getLastDayOfMonth(years_value,end_month); 
        String seasonDate = years_value+"-"+start_month+"-"+start_days+";"+years_value+"-"+end_month+"-"+end_days; 
        return seasonDate; 
         
    } 
    /**
     * 获得下季度的第一天和最后一天
     * @author zxg
     * @param month
     * @return
     */
    public static String getDownSeasonFirstEndDay(int month){ 
        int array[][] = {{1,2,3},{4,5,6},{7,8,9},{10,11,12}}; 
        int season = 1; 
        if(month>=1&&month<=3){ 
            season = 2; 
        } 
        if(month>=4&&month<=6){ 
            season = 3; 
        } 
        if(month>=7&&month<=9){ 
            season = 4; 
        } 
        if(month>=10&&month<=12){ 
            season = 1; 
        } 
        int start_month = array[season-1][0]; 
        int end_month = array[season-1][2]; 
         
        Date date = new Date(); 
        SimpleDateFormat   dateFormat   =   new   SimpleDateFormat("yyyy");//可以方便地修改日期格式    
        String  years  = dateFormat.format(date);    
        int years_value = Integer.parseInt(years); 
        if(month>=10&&month<=12){
            years_value++;
        }
        int start_days =1;//years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month); 
        int end_days = getLastDayOfMonth(years_value,end_month); 
        String seasonDate = years_value+"-"+start_month+"-"+start_days+";"+years_value+"-"+end_month+"-"+end_days; 
        return seasonDate; 
         
    } 
    /**
     * 获得季度首月的25号
     * （业务需求改变，要求改为季度首月10号）
     * @author zxg
     * @param month
     * @param isThisSeason:
     *             (1)true:本季度首月的25号 （本季度首月10号）
     *             (2)false:下季度首月的25号 （下季度首月10号）
     * @return
     */
    public static Date getSeasonTwentyFive(int month,boolean isThisSeason){ 
           int array[][] = {{1,2,3},{4,5,6},{7,8,9},{10,11,12}}; 
           int season = 1; 
           if(month>=1&&month<=3){
               if(isThisSeason){
                   season = 1; 
               }else{
                   season = 2;
               }
           } 
           if(month>=4&&month<=6){ 
               if(isThisSeason){
                   season = 2; 
               }else{
                   season = 3;
               }
           } 
           if(month>=7&&month<=9){ 
               if(isThisSeason){
                   season = 3; 
               }else{
                   season = 4;
               } 
           } 
           if(month>=10&&month<=12){ 
               if(isThisSeason){
                   season = 4; 
               }else{
                   season = 1;
               } 
           } 
           int start_month = array[season-1][0]; 
            
           Date date = new Date(); 
           SimpleDateFormat   dateFormat   =   new   SimpleDateFormat("yyyy");//可以方便地修改日期格式    
           String  years  = dateFormat.format(date);    
           int years_value = Integer.parseInt(years); 
           if(month>=10&&month<=12&&!isThisSeason){
               years_value++;
           }
           int start_days =10; 
           String seasonDateStr = years_value+"-"+start_month+"-"+start_days; 
           Date seasonDate=new Date();
            try {
                seasonDate = changeStringToDate(seasonDateStr);
            } catch (ParseException e) {
                e.printStackTrace();
            }
           return seasonDate; 
            
       }
    /**
     * 获得季度首月的26号
     * （业务需求改变，要求改为季度首月11号）
     * @author zxg
     * @param month
     * @param isThisSeason:
     *             (1)true:本季度首月的26号 （本季度首月11号）
     *             (2)false:上季度首月的26号  （上季度首月11号）
     * @return
     */
    public static Date getSeasonTwentySix(int month,boolean isThisSeason){ 
           int array[][] = {{1,2,3},{4,5,6},{7,8,9},{10,11,12}}; 
           int season = 1; 
           if(month>=1&&month<=3){
               if(isThisSeason){
                   season = 1; 
               }else{
                   season = 4;
               }
           } 
           if(month>=4&&month<=6){ 
               if(isThisSeason){
                   season = 2; 
               }else{
                   season = 1;
               }
           } 
           if(month>=7&&month<=9){ 
               if(isThisSeason){
                   season = 3; 
               }else{
                   season = 2;
               } 
           } 
           if(month>=10&&month<=12){ 
               if(isThisSeason){
                   season = 4; 
               }else{
                   season = 3;
               } 
           } 
           int start_month = array[season-1][0]; 
            
           Date date = new Date(); 
           SimpleDateFormat   dateFormat   =   new   SimpleDateFormat("yyyy");//可以方便地修改日期格式    
           String  years  = dateFormat.format(date);    
           int years_value = Integer.parseInt(years); 
           if(month>=1&&month<=3&&!isThisSeason){
                years_value--;
            }
           int start_days =11/*26*/; 
           String seasonDateStr = years_value+"-"+start_month+"-"+start_days; 
           Date seasonDate=new Date();
            try {
                seasonDate = changeStringToDate(seasonDateStr);
            } catch (ParseException e) {
                e.printStackTrace();
            }
           return seasonDate; 
            
       }
    /**
     * 获取某年某月的最后一天
     * @author zxg
     * @param year 年
     * @param month 月
     * @return 最后一天
     */ 
   public static int getLastDayOfMonth(int year, int month) { 
         if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 
                   || month == 10 || month == 12) { 
               return 31; 
         } 
         if (month == 4 || month == 6 || month == 9 || month == 11) { 
               return 30; 
         } 
         if (month == 2) { 
               if (isLeapYear(year)) { 
                   return 29; 
               } else { 
                   return 28; 
               } 
         } 
         return 0; 
   } 
   
  
   /**
    * 计算2个日期中间间隔的时间
    */
   public static int getIntervalDays(Date startday,Date endday){
       if(startday.after(endday)){ 
           Date cal=startday; 
           startday=endday; 
           endday=cal; 
       }        
       long sl=startday.getTime(); 
       long el=endday.getTime();       
       long ei=el-sl;           
       return (int)(ei/(1000*60*60*24)+1); 
   }

   /**
    * 是否闰年
    * @author zxg
    * @param year 年
    * @return 
    */ 
  public static boolean isLeapYear(int year) { 
        return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0); 
  } 
  /**
     * 获取当天的最后一秒
     * @return
     */
      public static Date getDayLastSecond(){
        Date targetDate = new Date();
        String dateStr = dateToString(targetDate);
        try {
            targetDate = changeStringToDate(dateStr+" 23:59:59","yyyy-MM-dd HH:mm:ss");
        } catch (ParseException e) {
            e.printStackTrace();
        }
        System.out.println("targetDate:"+targetDate);
        return targetDate;
      }
/**
* 获取当天的第一秒
* @return
*/
public static Date getDayFirstSecond(){
    Date targetDate = new Date();
    String dateStr = dateToString(targetDate);
    try {
        targetDate = changeStringToDate(dateStr+" 00:00:00","yyyy-MM-dd HH:mm:ss");
    } catch (ParseException e) {
        e.printStackTrace();
    }
    return targetDate;
}
    /**
     * date:2012-12-01||2012-12-31
     * type:第一天：10   最后一天：20；
     * getDayFirstLast(这里用一句话描述这个方法的作用)
     * (这里描述这个方法适用条件 – 可选)
     * @param type
     * @return 
     *Date
     * @throws ParseException 
     * @exception 
     * @since  1.0.0
     */
    public static Date getDayFirstLast(Date dateParm,String type) throws ParseException{
        Date targetDate = new Date();
        String dateStr=dateToString(dateParm);
        if("10".equals(type)){
            targetDate = changeStringToDate(dateStr+" 00:00:00","yyyy-MM-dd HH:mm:ss");
            return targetDate;
        }else if("20".equals(type)){
            targetDate = changeStringToDate(dateStr+" 23:59:59","yyyy-MM-dd HH:mm:ss");
            return targetDate;
        }else{
            return new Date();
        }
    }
    public static Date nextday(){
        Date date = new Date();
       Calendar calendar = GregorianCalendar.getInstance();
       calendar.setTime(date);
       calendar.add(Calendar.DATE, 1);
       date = calendar.getTime();
       return date;
    }
    /**
     * 根据参数得到指定时间段后的一天
     * nextDayByType(这里用一句话描述这个方法的作用)
     * (这里描述这个方法适用条件 – 可选)
     * @param day
     * @return 
     *Date
     * @exception 
     * @since  1.0.0
     */
    public static Date nextDayByType(int day){
       Date date = new Date();
       Calendar calendar = GregorianCalendar.getInstance();
       calendar.setTime(date);
       calendar.add(Calendar.DATE, day);
       date = calendar.getTime();
       return date;
    }
    public static Date nextDayByType(Date crruDate, int day){
           Calendar calendar = GregorianCalendar.getInstance();
           calendar.setTime(crruDate);
           calendar.add(Calendar.DATE, day);
           crruDate = calendar.getTime();
           return crruDate;
        }
    /*
     * 单元测试
     */
    @Test
    public void dateExample(){
//        System.out.println("获得下季度第一天 :"+getNextSeasonFirstDay(4));
//        System.out.println("获得本季度首月的26号:"+getSeasonTwentySix(1,true));
//        System.out.println("获得上季度首月的26号:"+getSeasonTwentySix(1,false));
//        
//        System.out.println("获得本季度的第一天和最后一天:"+getSeasonFirstEndDay(10,true));
//        System.out.println("获得上季度的第一天和最后一天:"+getSeasonFirstEndDay(10,false));
    }
    @Test
    public void currMonth(){
        String str =  "" ;
        SimpleDateFormat sdf= new  SimpleDateFormat( "yyyy-MM-dd" );
        Calendar lastDate = Calendar.getInstance();
        int month=lastDate.get(Calendar.MONTH); 
        str=sdf.format(lastDate.getTime());
//        System.out.println("month :"+month);
//        String dayStr=getSeasonFirstEndDay(9,true);
//        String str[]=dayStr.split(";");
//        try {
//            System.out.println("str[0] :"+changeStringToDate(str[0]));
//        } catch (ParseException e) {
//            // TODO Auto-generated catch block
//            e.printStackTrace();
//        }
//        System.out.println("str[1] :"+str[1]);
    }
    @Test
    public void dateTest() throws ParseException{
        System.out.println("获得下季度第一天 :"+dateToString(nextDayByType(changeStringToDate("2013-01-02 14:30:30", "yyyy-MM-dd HH:mm:ss"),12),"yyyy-MM-dd HH:mm:ss"));
    }


}