Java工具类

野性酷女 2024-04-06 10:58 36阅读 0赞

DateUtils:

package com.feng.test1.utils;
    
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.util.StringUtils;
    
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Date;
    
    /**
     * @Desc：
     * @Author：ybb
     * @Date：2022/9/20
     * @Version 1.0
     */
    @Slf4j
    public class DateUtils {
    
    	private static final String DEFAULT_PATTERN = "yyyy-MM-dd";
    	private static final String DEFAULT_PATTERN4 = "yyyyMMdd";
    	private static final String DEFAULT_FULL_PATTERN = "yyyy-MM-dd HH:mm:ss";
    
    
    	/**
    	 * 返回该月可能的最大日期
    	 *
    	 * @param date
    	 * @return
    	 *
    	 * 例如：
    	 *  传入的日期： 2008年4月1日
    	 *  返回的日期： 2008年4月30日
    	 */
    	public static Date actualMaxDate(Date date){
    		Calendar calendar = calendar(date);
    		int actualMaximum = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
    		calendar.set(Calendar.DAY_OF_MONTH, actualMaximum);
    		return calendar.getTime();
    	}
    
    	/**
    	 * 获取指定日期的月数差
    	 *
    	 * @param startDate
    	 * @param endDate
    	 * @return
    	 */
    	public static int monthBetween(Date startDate, Date endDate){
    		int months = 0;
    		Calendar startDay = calendar(startDate);
    		Calendar endDay = calendar(endDate);
    
    		int startYear = startDay.get(Calendar.YEAR);
    		int startMonth = startDay.get(Calendar.MONTH);
    
    		int endYear = endDay.get(Calendar.YEAR);
    		int endMonth = endDay.get(Calendar.MONTH);
    
    		months = (endYear - startYear) * 12 + (endMonth - startMonth);
    		return months;
    	}
    
    	/**
    	 * 将指定日期转换为 Calendar对象
    	 *
    	 * @param date
    	 * @return
    	 */
    	public static Calendar calendar(Date date){
    		Calendar calendar = Calendar.getInstance();
    		calendar.setTime(date);
    		return calendar;
    	}
    
    	public static int getMonth(Date date){
    		Calendar calendar = calendar(date);
    		return calendar.get(Calendar.MONTH) + 1;
    	}
    
    	/**
    	 * 返回某月的天数
    	 * @param date
    	 * @return
    	 */
    	public static int getMonthLength(Date date){
    		Calendar instance = calendar(date);
    		return instance.getActualMaximum(Calendar.DAY_OF_MONTH);
    	}
    	/**
    	 * 返回某年的天数
    	 * @param date
    	 * @return
    	 */
    	public static int getMYearLength(Date date){
    		Calendar instance = calendar(date);
    		return instance.getActualMaximum(Calendar.DAY_OF_YEAR);
    	}
    
    	/**
    	 * 把String 类型的日期转化为相应的格式
    	 *
    	 * @param dateString 字符串日期
    	 * @parma formatNum 需要按照哪种类型
    	 *
    	 *          1 yyyyMMdd
    	 *          2 yyyy/MM/dd
    	 *          3 yyyy-MM-dd
    	 *          4 yyyy-MM-dd HH:mm:ss
    	 *          5 yyyyMMddHHmmss
    	 *          6 yyyy-MM-dd HH:mm:ss.sss
    	 *          7 HH:mm
    	 *          8 yyyy年MM月dd日
    	 *          9 yyyyMMddHHmmssSSS
    	 *          10 yyyy年MM月dd日 HH:mm
    	 *          11 yyyy-MM-dd HH
    	 *          12 HH:mm:ss
    	 *          13 yyyy/MM/dd HH:mm:ss
    	 *          15 yyyy-MM-dd HH:mm
    	 *          16 yyyyMM
    	 *          17 yyyy年MM月dd日hh时mm分
    	 *          18 yyyy/MM/ddHH:mm:ss
    	 *          19 yyyyMMdd HH:mm:ss
    	 * @return
    	 */
    	public static Date stringToDate(String dateString, int formatNum){
    		if (formatNum == 13 || formatNum == 18) {
    			if (dateString.contains(" ")) {
    				formatNum = 13;
    			} else {
    				formatNum = 18;
    			}
    		}
    		Date date = null;
    		try {
    			SimpleDateFormat sdf = dateFormat(formatNum);
    			if (!StringUtils.isEmpty(dateString)) {
    				date = sdf.parse(dateString);
    			}
    		}catch (ParseException e) {
    			date = null;
    			log.error("stringToDate转换错误:{}", e);
    		}
    		return date;
    	}
    
    	/**
    	 * 日期转字符串
    	 * @param date
    	 * @param formatNum
    	 * @return
    	 */
    	public static String dateToString(Date date, int formatNum){
    		String str = "";
    		if (date != null) {
    			SimpleDateFormat sdf = dateFormat(formatNum);
    			if (sdf != null) {
    				str = sdf.format(date);
    			}
    		}
    		return str;
    	}
    
    	public static SimpleDateFormat dateFormat(int formatNum){
    		SimpleDateFormat dateFormat = null;
    		switch (formatNum) {
    			case 1:
    				dateFormat = new SimpleDateFormat("yyyyMMdd");
    				break;
    			case 2:
    				dateFormat = new SimpleDateFormat("yyyy/MM/dd");
    				break;
    			case 3:
    				dateFormat = new SimpleDateFormat("yyyy-MM-dd");
    				break;
    			case 4:
    				dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    				break;
    			case 5:
    				dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
    				break;
    			case 6:
    				dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.sss");
    				break;
    			case 7:
    				dateFormat = new SimpleDateFormat("HH:mm");
    				break;
    			case 8:
    				dateFormat = new SimpleDateFormat("yyyy年MM月dd日");
    				break;
    			case 9:
    				dateFormat = new SimpleDateFormat("yyyyMMddHHmmssSSS");
    				break;
    			case 10:
    				dateFormat = new SimpleDateFormat("yyyy年MM月dd日 HH:mm");
    				break;
    			case 11:
    				dateFormat = new SimpleDateFormat("yyyy-MM-dd HH");
    				break;
    			case 12:
    				dateFormat = new SimpleDateFormat("HH:mm:ss");
    				break;
    			case 13:
    				dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
    				break;
    			case 14:
    				dateFormat = new SimpleDateFormat("yyyy-MM-dd'T' HH:mm:ss+08:00");
    				break;
    			case 15:
    				dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm");
    				break;
    			case 16:
    				dateFormat = new SimpleDateFormat("yyyyMM");
    				break;
    			case 17:
    				dateFormat = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分");
    				break;
    			case 18:
    				dateFormat = new SimpleDateFormat("yyyy/MM/ddHH:mm:ss");
    				break;
    			case 19:
    				dateFormat = new SimpleDateFormat("yyyyMMdd HH:mm:ss");
    				break;
    			case 20:
    				dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
    				break;
    			default:
    				log.info("switch条件不足："+formatNum);
    		}
    
    		return dateFormat;
    	}
    
    }

class DateUtils{
    
        
    	/**
    	 * @Description 是否为当天24h内
    	 * @param inputJudgeDate 要判断是否在当天24h内的时间
    	 * @return
    	 * boolean
    	 */
    	public static boolean isToday(Date inputJudgeDate) {
    		boolean flag = false;
    		//获取当前系统时间
    		long longDate = System.currentTimeMillis();
    		Date nowDate = new Date(longDate);
    		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    		String format = dateFormat.format(nowDate);
    		String subDate = format.substring(0, 10);
    		//定义每天的24h时间范围
    		String beginTime = subDate + " 00:00:00";
    		String endTime = subDate + " 23:59:59";
    		Date paseBeginTime = null;
    		Date paseEndTime = null;
    		try {
    			paseBeginTime = dateFormat.parse(beginTime);
    			paseEndTime = dateFormat.parse(endTime);
    
    		} catch (ParseException e) {
    
    		}
    		if(inputJudgeDate.after(paseBeginTime) && inputJudgeDate.before(paseEndTime)) {
    			flag = true;
    		}
    		return flag;
    	}
    
    	public static void main(String[] args) {
    		//测试时间1
    		String testTimeOne = "2022-09-19 10:25:11";
    		//测试时间2
    		String testTimeTwo = "2018-08-01 13:09:51";
    		//时间格式化
    		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    		Date psTestTimeOne = null;
    		Date psTestTimeTwo = null;
    		try {
    			psTestTimeOne = format.parse(testTimeOne);
    			psTestTimeTwo = format.parse(testTimeTwo);
    		} catch (ParseException e) {
    			e.printStackTrace();
    		}
    		boolean timeOneIsToday = isToday(psTestTimeOne);
    		boolean timeTwoIsToday = isToday(psTestTimeTwo);
    		System.out.println("测试时间输出为true，则处于当天24h范围内，false反之。");
    		System.out.println("测试时间一："+timeOneIsToday);
    		System.out.println("测试时间二："+timeTwoIsToday);
    	}
    
    
    }

FileUtils:

public void writeToFile(String data){
    		BufferedWriter out = null;
    		try {
    			File file = new File("D:\\data.txt");
    			if (!file.exists()) {
    				file.createNewFile();
    				FileWriter writer = new FileWriter(file);
    				out = new BufferedWriter(writer);
    				out.write(data);
    				out.flush();
    				out.close();
    			}
    		}catch (Exception e) {
    
    		} finally {
    			if (out != null) {
    				try {
    					out.close();
    				} catch (Exception e) {
    
    				}
    			}
    		}
    }