java 如何从字符串里面提取时间
作者:cpown
这篇文章主要介绍了java实现从字符串里面提取时间的方式,具有很好的参考价值,希望对大家有所帮助。如有错误或未考虑完全的地方,望不吝赐教
如何从字符串里面提取时间
今天接到一个需求,需要从一段带有时间串的字符串里面提取出时间保存。
"PDFS(iZh9k5gurgwcwpZ) 2020-01-01 21:27:36.560 >订单编号:1112233 提交订单成功! 跟踪号:待取跟踪号 内部单号:2342244"
需要从上面数据中心提取出 2020-01-01 21:27:36要怎么操作呢?
我们可以使用正则表达式
对时间串进行提取,并处理,代码如下:
package com.epean.trade.framework.util; import org.apache.commons.lang.time.DateFormatUtils; import org.apache.commons.lang.time.DateUtils; import java.text.ParseException; import java.util.Date; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * Created by chpeng on 2020/08/18 0008. */ public class StringDateUtils { /** * * @Description: 从字符串中截取出正确的时间 * @param stringTime * @return: * @throws */ public static Date cutDate(String stringTime) { String regs[] = { "\\d{4}年\\d{2}月\\d{2}日\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{4}年\\d{2}月\\d{2}日\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{4}年\\d{2}月\\d{2}日\\d{2}时\\d{2}分\\d{2}秒", "\\d{4}年\\d{2}月\\d{2}日\\s\\d{2}时\\d{2}分", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{2}时\\d{2}分", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{1}时\\d{2}分", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{2}时\\d{2}分", "\\d{4}年\\d{2}月\\d{2}日\\d{2}时\\d{2}分", "\\d{4}年\\d{2}月\\d{2}日\\s\\d{2}时", "\\d{4}年\\d{2}月\\d{2}日\\s\\d{1}时", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{2}时", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{1}时", "\\d{4}年\\d{2}月\\d{2}日\\d{2}时", "\\d{4}年\\d{2}月\\d{2}日", "\\d{4}年\\d{2}月\\d{1}日", "\\d{4}年\\d{1}月\\d{2}日", "\\d{4}年\\d{1}月\\d{1}日", "\\d{4}年\\d{2}月\\d{2}日\\s\\d{2}:\\d{2}:\\d{2}", "\\d{4}年\\d{2}月\\d{2}日\\s\\d{2}:\\d{1}:\\d{2}", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{2}:\\d{1}:\\d{2}", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{2}:\\d{2}:\\d{2}", "\\d{4}年\\d{2}月\\d{2}日\\d{2}:\\d{2}:\\d{2}", "\\d{4}年\\d{2}月\\d{2}日\\s\\d{2}:\\d{2}", "\\d{4}年\\d{2}月\\d{2}日\\s\\d{1}:\\d{2}", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{2}:\\d{2}", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{1}:\\d{2}", "\\d{4}年\\d{2}月\\d{2}日\\d{2}:\\d{2}", "\\d{4}年\\d{2}月\\d{2}日\\s\\d{2}", "\\d{4}年\\d{2}月\\d{2}日\\s\\d{1}", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{2}", "\\d{4}年\\d{1}月\\d{2}日\\s\\d{1}", "\\d{4}年\\d{2}月\\d{2}日\\d{2}", "\\d{4}-\\d{2}-\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{4}-\\d{2}-\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{4}-\\d{1}-\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{4}-\\d{1}-\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{4}-\\d{2}-\\d{2}\\s\\d{2}:\\d{2}", "\\d{4}-\\d{2}-\\d{2}\\s\\d{1}:\\d{2}", "\\d{4}-\\d{2}-\\d{2}\\s\\d{2}", "\\d{4}-\\d{2}-\\d{2}", "\\d{4}-\\d{2}-\\d{1}", "\\d{4}-\\d{1}-\\d{2}", "\\d{4}-\\d{1}-\\d{1}", "\\d{4}-\\d{2}-\\d{2}\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{4}-\\d{2}-\\d{2}\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{4}-\\d{1}-\\d{2}\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{4}-\\d{1}-\\d{2}\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{4}-\\d{1}-\\d{1}\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{4}-\\d{2}-\\d{2}\\s\\d{2}时\\d{2}分", "\\d{4}-\\d{2}-\\d{2}\\s\\d{1}时\\d{2}分", "\\d{4}-\\d{1}-\\d{2}\\s\\d{2}时\\d{2}分", "\\d{4}-\\d{1}-\\d{2}\\s\\d{1}时\\d{2}分", "\\d{4}-\\d{2}-\\d{2}\\s\\d{2}时", "\\d{4}-\\d{2}-\\d{2}\\s\\d{1}时", "\\d{4}-\\d{1}-\\d{2}\\s\\d{2}时", "\\d{4}-\\d{1}-\\d{2}\\s\\d{1}时", "\\d{4}.\\d{2}.\\d{2}", "\\d{4}.\\d{2}.\\d{1}", "\\d{4}.\\d{1}.\\d{2}", "\\d{4}.\\d{1}.\\d{1}", "\\d{4}.\\d{2}.\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{4}.\\d{2}.\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{4}.\\d{1}.\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{4}.\\d{1}.\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{4}.\\d{1}.\\d{1}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{4}.\\d{2}.\\d{2}\\s\\d{2}:\\d{2}", "\\d{4}.\\d{2}.\\d{2}\\s\\d{1}:\\d{2}", "\\d{4}.\\d{1}.\\d{2}\\s\\d{2}:\\d{2}", "\\d{4}.\\d{1}.\\d{2}\\s\\d{1}:\\d{2}", "\\d{4}.\\d{2}.\\d{2}\\s\\d{2}", "\\d{4}.\\d{2}.\\d{2}\\s\\d{1}", "\\d{4}.\\d{1}.\\d{2}\\s\\d{2}", "\\d{4}.\\d{1}.\\d{2}\\s\\d{1}", "\\d{4}/\\d{2}/\\d{2}\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{4}/\\d{2}/\\d{2}\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{4}/\\d{1}/\\d{2}\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{4}/\\d{1}/\\d{2}\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{4}/\\d{2}/\\d{2}\\s\\d{2}时\\d{2}分", "\\d{4}/\\d{2}/\\d{2}\\s\\d{1}时\\d{2}分", "\\d{4}/\\d{1}/\\d{2}\\s\\d{2}时\\d{2}分", "\\d{4}/\\d{1}/\\d{2}\\s\\d{1}时\\d{2}分", "\\d{4}/\\d{2}/\\d{2}\\s\\d{2}时", "\\d{4}/\\d{2}/\\d{2}\\s\\d{1}时", "\\d{4}/\\d{1}/\\d{2}\\s\\d{2}时", "\\d{4}/\\d{1}/\\d{2}\\s\\d{1}时", "\\d{4}/\\d{2}/\\d{2}", "\\d{4}/\\d{2}/\\d{1}", "\\d{4}/\\d{1}/\\d{2}", "\\d{4}/\\d{1}/\\d{1}", "\\d{4}/\\d{2}/\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{4}/\\d{2}/\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{4}/\\d{1}/\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{4}/\\d{1}/\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{4}/\\d{2}/\\d{2}\\s\\d{2}:\\d{2}", "\\d{4}/\\d{2}/\\d{2}\\s\\d{1}:\\d{2}", "\\d{4}/\\d{1}/\\d{2}\\s\\d{2}:\\d{2}", "\\d{4}/\\d{1}/\\d{2}\\s\\d{1}:\\d{2}", "\\d{4}/\\d{2}/\\d{2}\\s\\d{2}", "\\d{4}/\\d{2}/\\d{2}\\s\\d{1}", "\\d{4}/\\d{1}/\\d{2}\\s\\d{2}", "\\d{4}/\\d{1}/\\d{2}\\s\\d{1}", "\\d{2}月\\d{2}日\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{2}月\\d{2}日\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{1}月\\d{2}日\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{1}月\\d{2}日\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{2}月\\d{2}日\\d{2}时\\d{2}分\\d{2}秒", "\\d{2}月\\d{2}日\\s\\d{2}时\\d{2}分", "\\d{1}月\\d{2}日\\s\\d{2}时\\d{2}分", "\\d{1}月\\d{2}日\\s\\d{1}时\\d{2}分", "\\d{1}月\\d{2}日\\s\\d{2}时\\d{2}分", "\\d{2}月\\d{2}日\\d{2}时\\d{2}分", "\\d{2}月\\d{2}日\\s\\d{2}时", "\\d{2}月\\d{2}日\\s\\d{1}时", "\\d{1}月\\d{2}日\\s\\d{2}时", "\\d{1}月\\d{2}日\\s\\d{1}时", "\\d{2}月\\d{2}日\\d{2}时", "\\d{4}年\\d{2}月\\d{2}日", "\\d{2}月\\d{1}日", "\\d{4}年\\d{1}月\\d{2}日", "\\d{1}月\\d{1}日", "\\d{2}月\\d{2}日\\s\\d{2}:\\d{2}:\\d{2}", "\\d{2}月\\d{2}日\\s\\d{2}:\\d{1}:\\d{2}", "\\d{1}月\\d{2}日\\s\\d{2}:\\d{1}:\\d{2}", "\\d{1}月\\d{2}日\\s\\d{2}:\\d{2}:\\d{2}", "\\d{2}月\\d{2}日\\d{2}:\\d{2}:\\d{2}", "\\d{2}月\\d{2}日\\s\\d{2}:\\d{2}", "\\d{2}月\\d{2}日\\s\\d{1}:\\d{2}", "\\d{1}月\\d{2}日\\s\\d{2}:\\d{2}", "\\d{1}月\\d{2}日\\s\\d{1}:\\d{2}", "\\d{2}月\\d{2}日\\d{2}:\\d{2}", "\\d{2}月\\d{2}日\\s\\d{2}", "\\d{2}月\\d{2}日\\s\\d{1}", "\\d{1}月\\d{2}日\\s\\d{2}", "\\d{1}月\\d{2}日\\s\\d{1}", "\\d{2}月\\d{2}日\\d{2}", "\\d{2}-\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{2}-\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{1}-\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{1}-\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{2}-\\d{2}\\s\\d{2}:\\d{2}", "\\d{2}-\\d{2}\\s\\d{1}:\\d{2}", "\\d{2}-\\d{2}\\s\\d{2}", "\\d{4}-\\d{2}-\\d{2}", "\\d{2}-\\d{1}", "\\d{4}-\\d{1}-\\d{2}", "\\d{1}-\\d{1}", "\\d{2}-\\d{2}\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{2}-\\d{2}\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{1}-\\d{2}\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{1}-\\d{2}\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{1}-\\d{1}\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{2}-\\d{2}\\s\\d{2}时\\d{2}分", "\\d{2}-\\d{2}\\s\\d{1}时\\d{2}分", "\\d{1}-\\d{2}\\s\\d{2}时\\d{2}分", "\\d{1}-\\d{2}\\s\\d{1}时\\d{2}分", "\\d{2}-\\d{2}\\s\\d{2}时", "\\d{2}-\\d{2}\\s\\d{1}时", "\\d{1}-\\d{2}\\s\\d{2}时", "\\d{1}-\\d{2}\\s\\d{1}时", "\\d{4}.\\d{2}.\\d{2}", "\\d{2}.\\d{1}", "\\d{4}.\\d{1}.\\d{2}", "\\d{1}.\\d{1}", "\\d{2}.\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{2}.\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{1}.\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{1}.\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{1}.\\d{1}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{2}.\\d{2}\\s\\d{2}:\\d{2}", "\\d{2}.\\d{2}\\s\\d{1}:\\d{2}", "\\d{1}.\\d{2}\\s\\d{2}:\\d{2}", "\\d{1}.\\d{2}\\s\\d{1}:\\d{2}", "\\d{2}.\\d{2}\\s\\d{2}", "\\d{2}.\\d{2}\\s\\d{1}", "\\d{1}.\\d{2}\\s\\d{2}", "\\d{1}.\\d{2}\\s\\d{1}", "\\d{2}/\\d{2}\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{2}/\\d{2}\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{1}/\\d{2}\\s\\d{2}时\\d{2}分\\d{2}秒", "\\d{1}/\\d{2}\\s\\d{1}时\\d{2}分\\d{2}秒", "\\d{2}/\\d{2}\\s\\d{2}时\\d{2}分", "\\d{2}/\\d{2}\\s\\d{1}时\\d{2}分", "\\d{1}/\\d{2}\\s\\d{2}时\\d{2}分", "\\d{1}/\\d{2}\\s\\d{1}时\\d{2}分", "\\d{2}/\\d{2}\\s\\d{2}时", "\\d{2}/\\d{2}\\s\\d{1}时", "\\d{1}/\\d{2}\\s\\d{2}时", "\\d{1}/\\d{2}\\s\\d{1}时", "\\d{2}/\\d{2}", "\\d{2}/\\d{1}", "\\d{1}/\\d{2}", "\\d{1}/\\d{1}", "\\d{2}/\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{2}/\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{1}/\\d{2}\\s\\d{2}:\\d{2}:\\d{2}", "\\d{1}/\\d{2}\\s\\d{1}:\\d{2}:\\d{2}", "\\d{2}/\\d{2}\\s\\d{2}:\\d{2}", "\\d{2}/\\d{2}\\s\\d{1}:\\d{2}", "\\d{1}/\\d{2}\\s\\d{2}:\\d{2}", "\\d{1}/\\d{2}\\s\\d{1}:\\d{2}", "\\d{2}/\\d{2}\\s\\d{2}", "\\d{2}/\\d{2}\\s\\d{1}", "\\d{1}/\\d{2}\\s\\d{2}", "\\d{1}/\\d{2}\\s\\d{1}", }; String str = ""; Date date = null; for (String reg : regs) { String temp = match(reg, stringTime); if (temp.length() > str.length()) { str = temp; if (!"".equals(str)) { date = formatDate(str); } } } return date; } /** * * @Description: 把String格式的时间转化为date * @param stringTime * @return: * @throws */ public static Date formatDate(String stringTime) { Date date = null; if (StringUtils.isNotBlank(stringTime)) { String[] pattern = new String[] { "yyyy年MM月dd日HH时mm分ss秒", "yyyy年MM月dd日 HH时mm分ss秒", "yyyy年MM月dd日HH时mm分", "yyyy年MM月dd日 HH时mm分", "yyyy年MM月dd日 HH时", "yyyy年MM月dd日HH时", "yyyy年MM月dd日", "yyyy年MM月dd日HH:mm:ss", "yyyy年MM月dd日 HH:mm:ss", "yyyy年MM月dd日HH:mm", "yyyy年MM月dd日 HH:mm", "yyyy年MM月dd日 HH", "yyyy年MM月dd日HH", "yyyy-MM-dd HH时mm分ss秒", "yyyy-MM-dd HH时mm分", "yyyy-MM-dd HH时", "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM-dd HH", "yyyy/MM/dd HH时mm分ss秒", "yyyy/MM/dd HH时mm分", "yyyy/MM/dd HH时", "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM/dd HH", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM.dd HH", "yyyy.MM.dd", "yyyyMMdd", }; try { date = DateUtils.parseDate(stringTime, pattern); } catch (ParseException e) { e.printStackTrace(); } } return date; } public static String match(String reg, String stringTime) { Pattern p = Pattern.compile(reg); Matcher m = p.matcher(stringTime); String s = ""; if (m.find()) { s += m.group(); } return s; } /** * 格式化 * @Title: DateToString * @Description: * @param time * @return: * @throws */ public static String DateToString(Date time) { String newDate = DateFormatUtils.format(time,"yyyy-MM-dd HH:mm:ss"); return newDate; } public static void main(String[] args) { String stringTime = "PDFS(iZh9k5gurgwcwpZ) 2020-01-01 21:27:36.560 >订单编号:1112233 提交订单成功! 跟踪号:待取跟踪号 内部单号:2342244"; Date date = cutDate(stringTime); System.out.println(date); System.out.println(DateToString(date)); } }
我们测试一下:
没问题的。
从字符串中提取年份,要求输出1000-4999之间的所有年份
正则表达式
常用正则表达式:
\d
: 数字字符匹配。等效于 [0-9]\D
: 非数字字符匹配。等效于 [^0-9]。{n}
: n为非负整数,正好匹配n次{n,}
: n为非负整数,至少匹配n次[a-z]
: 字符范围。匹配指定范围内的任何字符,例如,"[a-z]"匹配"a"到"z"范围内的任何小写字母。[^a-z]
: 反向范围字符。匹配不在指定的范围内的任何字符。例如,"[^a-z]"匹配任何不在"a"到"z"范围内的任何字符。\
: 将下一字符标记为特殊字符、文本、反向引用或八进制转义符^
: 匹配输入字符串开始的位置$
: 匹配输入字符串结尾的位置。*
: 零次或多次匹配前面的字符或子表达式。例如,zo* 匹配"z"和"zoo"。* 等效于 {0,}+
: 一次或多次匹配前面的字符或子表达式。例如,"zo+"与"zo"和"zoo"匹配,但与"z"不匹配。+ 等效于 {1,}。?
: 零次或一次匹配前面的字符或子表达式。例如,"do(es)?"匹配"do"或"does"中的"do"。? 等效于 {0,1}。
import java.util.*; import java.util.regex.Matcher; import java.util.regex.Pattern; public class JingDong { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String str = sc.nextLine(); String reg = "\\D[1-4]\\d{3}\\D";//eg:a2019a、a2019、2019a // 前面不能是数字,后面也不能是数字 str = str +"a"; str = "a" + str; Pattern p = Pattern.compile(reg); Matcher matcher = p.matcher(str); while(matcher.find()){ System.out.print(matcher.group(0).substring(1,5) + " "); } } public static boolean isNum(char a){ if(Character.isDigit(a)){ return true; }else return false; } }
传统匹配:
import java.util.*; public class JingDong { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String str = sc.nextLine(); if(str.length()<=2000){ String out = ""; for (int i = 0; i < str.length()-1;) { if(isNum(str.charAt(i) )&& Integer.parseInt(String.valueOf(str.charAt(i))) <=4 && Integer.parseInt(String.valueOf(str.charAt(i)))>=1){ if(isNum(str.charAt(i+1))){ if(isNum(str.charAt(i+2))){ if(isNum(str.charAt(i+3))){ if (!isNum(str.charAt(i+4))){ out += str.substring(i,i+4); out += " "; i+=4; } i+=4; }else i++; }else i++; }else i++; }else i++; } System.out.println(out); } public static boolean isNum(char a){ if(Character.isDigit(a)){ return true; }else return false; } }
以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。