java 如何從字符串里面提取時(shí)間
更新時(shí)間：2021年09月14日 14:55:32 作者：cpown
這篇文章主要介紹了java實(shí)現(xiàn)從字符串里面提取時(shí)間的方式，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。如有錯(cuò)誤或未考慮完全的地方，望不吝賜教
如何從字符串里面提取時(shí)間
今天接到一個(gè)需求，需要從一段帶有時(shí)間串的字符串里面提取出時(shí)間保存。
"PDFS(iZh9k5gurgwcwpZ) 2020-01-01 21:27:36.560 >訂單編號(hào):1112233 提交訂單成功! 跟蹤號(hào):待取跟蹤號(hào) 內(nèi)部單號(hào):2342244"
需要從上面數(shù)據(jù)中心提取出 2020-01-01 21:27:36要怎么操作呢？
我們可以使用正則表達(dá)式
對(duì)時(shí)間串進(jìn)行提取，并處理，代碼如下：
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: 從字符串中截取出正確的時(shí)間
* @param stringTime
* @return:
* @throws
*/
public static Date cutDate(String stringTime) {
String regs[] = { "\\d{4}年\\d{2}月\\d{2}日\(chéng)\s\\d{2}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{2}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\d{2}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\s\\d{2}時(shí)\\d{2}分",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{2}時(shí)\\d{2}分",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{1}時(shí)\\d{2}分",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{2}時(shí)\\d{2}分",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\d{2}時(shí)\\d{2}分",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\s\\d{2}時(shí)",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\s\\d{1}時(shí)",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{2}時(shí)",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{1}時(shí)",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\d{2}時(shí)", "\\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\(chéng)\s\\d{2}:\\d{2}:\\d{2}",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\s\\d{2}:\\d{1}:\\d{2}",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{2}:\\d{1}:\\d{2}",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{2}:\\d{2}:\\d{2}",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\d{2}:\\d{2}:\\d{2}",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\s\\d{2}:\\d{2}",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\s\\d{1}:\\d{2}",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{2}:\\d{2}",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{1}:\\d{2}",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\d{2}:\\d{2}",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\s\\d{2}",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\s\\d{1}",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{2}",
"\\d{4}年\\d{1}月\\d{2}日\(chéng)\s\\d{1}",
"\\d{4}年\\d{2}月\\d{2}日\(chéng)\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}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}-\\d{2}-\\d{2}\\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}-\\d{1}-\\d{2}\\s\\d{2}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}-\\d{1}-\\d{2}\\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}-\\d{1}-\\d{1}\\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}-\\d{2}-\\d{2}\\s\\d{2}時(shí)\\d{2}分",
"\\d{4}-\\d{2}-\\d{2}\\s\\d{1}時(shí)\\d{2}分",
"\\d{4}-\\d{1}-\\d{2}\\s\\d{2}時(shí)\\d{2}分",
"\\d{4}-\\d{1}-\\d{2}\\s\\d{1}時(shí)\\d{2}分",
"\\d{4}-\\d{2}-\\d{2}\\s\\d{2}時(shí)",
"\\d{4}-\\d{2}-\\d{2}\\s\\d{1}時(shí)",
"\\d{4}-\\d{1}-\\d{2}\\s\\d{2}時(shí)",
"\\d{4}-\\d{1}-\\d{2}\\s\\d{1}時(shí)", "\\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}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}/\\d{2}/\\d{2}\\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}/\\d{1}/\\d{2}\\s\\d{2}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}/\\d{1}/\\d{2}\\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{4}/\\d{2}/\\d{2}\\s\\d{2}時(shí)\\d{2}分",
"\\d{4}/\\d{2}/\\d{2}\\s\\d{1}時(shí)\\d{2}分",
"\\d{4}/\\d{1}/\\d{2}\\s\\d{2}時(shí)\\d{2}分",
"\\d{4}/\\d{1}/\\d{2}\\s\\d{1}時(shí)\\d{2}分",
"\\d{4}/\\d{2}/\\d{2}\\s\\d{2}時(shí)",
"\\d{4}/\\d{2}/\\d{2}\\s\\d{1}時(shí)",
"\\d{4}/\\d{1}/\\d{2}\\s\\d{2}時(shí)",
"\\d{4}/\\d{1}/\\d{2}\\s\\d{1}時(shí)",
"\\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\(chéng)\s\\d{2}時(shí)\\d{2}分\\d{2}秒",
"\\d{2}月\\d{2}日\(chéng)\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{1}月\\d{2}日\(chéng)\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{1}月\\d{2}日\(chéng)\s\\d{2}時(shí)\\d{2}分\\d{2}秒",
"\\d{2}月\\d{2}日\(chéng)\d{2}時(shí)\\d{2}分\\d{2}秒",
"\\d{2}月\\d{2}日\(chéng)\s\\d{2}時(shí)\\d{2}分",
"\\d{1}月\\d{2}日\(chéng)\s\\d{2}時(shí)\\d{2}分",
"\\d{1}月\\d{2}日\(chéng)\s\\d{1}時(shí)\\d{2}分",
"\\d{1}月\\d{2}日\(chéng)\s\\d{2}時(shí)\\d{2}分",
"\\d{2}月\\d{2}日\(chéng)\d{2}時(shí)\\d{2}分",
"\\d{2}月\\d{2}日\(chéng)\s\\d{2}時(shí)",
"\\d{2}月\\d{2}日\(chéng)\s\\d{1}時(shí)",
"\\d{1}月\\d{2}日\(chéng)\s\\d{2}時(shí)",
"\\d{1}月\\d{2}日\(chéng)\s\\d{1}時(shí)",
"\\d{2}月\\d{2}日\(chéng)\d{2}時(shí)", "\\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\(chéng)\s\\d{2}:\\d{2}:\\d{2}",
"\\d{2}月\\d{2}日\(chéng)\s\\d{2}:\\d{1}:\\d{2}",
"\\d{1}月\\d{2}日\(chéng)\s\\d{2}:\\d{1}:\\d{2}",
"\\d{1}月\\d{2}日\(chéng)\s\\d{2}:\\d{2}:\\d{2}",
"\\d{2}月\\d{2}日\(chéng)\d{2}:\\d{2}:\\d{2}",
"\\d{2}月\\d{2}日\(chéng)\s\\d{2}:\\d{2}",
"\\d{2}月\\d{2}日\(chéng)\s\\d{1}:\\d{2}",
"\\d{1}月\\d{2}日\(chéng)\s\\d{2}:\\d{2}",
"\\d{1}月\\d{2}日\(chéng)\s\\d{1}:\\d{2}",
"\\d{2}月\\d{2}日\(chéng)\d{2}:\\d{2}",
"\\d{2}月\\d{2}日\(chéng)\s\\d{2}",
"\\d{2}月\\d{2}日\(chéng)\s\\d{1}",
"\\d{1}月\\d{2}日\(chéng)\s\\d{2}",
"\\d{1}月\\d{2}日\(chéng)\s\\d{1}",
"\\d{2}月\\d{2}日\(chéng)\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}時(shí)\\d{2}分\\d{2}秒",
"\\d{2}-\\d{2}\\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{1}-\\d{2}\\s\\d{2}時(shí)\\d{2}分\\d{2}秒",
"\\d{1}-\\d{2}\\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{1}-\\d{1}\\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{2}-\\d{2}\\s\\d{2}時(shí)\\d{2}分",
"\\d{2}-\\d{2}\\s\\d{1}時(shí)\\d{2}分",
"\\d{1}-\\d{2}\\s\\d{2}時(shí)\\d{2}分",
"\\d{1}-\\d{2}\\s\\d{1}時(shí)\\d{2}分",
"\\d{2}-\\d{2}\\s\\d{2}時(shí)",
"\\d{2}-\\d{2}\\s\\d{1}時(shí)",
"\\d{1}-\\d{2}\\s\\d{2}時(shí)",
"\\d{1}-\\d{2}\\s\\d{1}時(shí)", "\\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}時(shí)\\d{2}分\\d{2}秒",
"\\d{2}/\\d{2}\\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{1}/\\d{2}\\s\\d{2}時(shí)\\d{2}分\\d{2}秒",
"\\d{1}/\\d{2}\\s\\d{1}時(shí)\\d{2}分\\d{2}秒",
"\\d{2}/\\d{2}\\s\\d{2}時(shí)\\d{2}分",
"\\d{2}/\\d{2}\\s\\d{1}時(shí)\\d{2}分",
"\\d{1}/\\d{2}\\s\\d{2}時(shí)\\d{2}分",
"\\d{1}/\\d{2}\\s\\d{1}時(shí)\\d{2}分",
"\\d{2}/\\d{2}\\s\\d{2}時(shí)",
"\\d{2}/\\d{2}\\s\\d{1}時(shí)",
"\\d{1}/\\d{2}\\s\\d{2}時(shí)",
"\\d{1}/\\d{2}\\s\\d{1}時(shí)",
"\\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格式的時(shí)間轉(zhuǎn)化為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時(shí)mm分ss秒",
"yyyy年MM月dd日 HH時(shí)mm分ss秒", "yyyy年MM月dd日HH時(shí)mm分",
"yyyy年MM月dd日 HH時(shí)mm分", "yyyy年MM月dd日 HH時(shí)", "yyyy年MM月dd日HH時(shí)",
"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時(shí)mm分ss秒", "yyyy-MM-dd HH時(shí)mm分",
"yyyy-MM-dd HH時(shí)", "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss",
"yyyy-MM-dd HH:mm", "yyyy-MM-dd HH",
"yyyy/MM/dd HH時(shí)mm分ss秒", "yyyy/MM/dd HH時(shí)mm分",
"yyyy/MM/dd HH時(shí)", "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 >訂單編號(hào):1112233 提交訂單成功! 跟蹤號(hào):待取跟蹤號(hào) 內(nèi)部單號(hào):2342244";
Date date = cutDate(stringTime);
System.out.println(date);
System.out.println(DateToString(date));
}
}
我們測(cè)試一下：
沒(méi)問(wèn)題的。
從字符串中提取年份，要求輸出1000-4999之間的所有年份
正則表達(dá)式
常用正則表達(dá)式：
\d: 數(shù)字字符匹配。等效于 [0-9]\D: 非數(shù)字字符匹配。等效于 [^0-9]。{n}: n為非負(fù)整數(shù)，正好匹配n次{n,}: n為非負(fù)整數(shù)，至少匹配n次[a-z]: 字符范圍。匹配指定范圍內(nèi)的任何字符,例如，"[a-z]"匹配"a"到"z"范圍內(nèi)的任何小寫字母。[^a-z]: 反向范圍字符。匹配不在指定的范圍內(nèi)的任何字符。例如，"[^a-z]"匹配任何不在"a"到"z"范圍內(nèi)的任何字符。\: 將下一字符標(biāo)記為特殊字符、文本、反向引用或八進(jìn)制轉(zhuǎn)義符^: 匹配輸入字符串開始的位置$: 匹配輸入字符串結(jié)尾的位置。*: 零次或多次匹配前面的字符或子表達(dá)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達(dá)式。例如，"zo+"與"zo"和"zoo"匹配，但與"z"不匹配。+ 等效于 {1,}。?: 零次或一次匹配前面的字符或子表達(dá)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
// 前面不能是數(shù)字，后面也不能是數(shù)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;
}
}
傳統(tǒng)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;
}
}
以上為個(gè)人經(jīng)驗(yàn)，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。
相關(guān)文章
springboot全局字符編碼設(shè)置方式(解決亂碼問(wèn)題)
這篇文章主要介紹了springboot全局字符編碼設(shè)置方式(解決亂碼問(wèn)題),具有很好的參考價(jià)值,希望對(duì)大家有所幫助,如有錯(cuò)誤或未考慮完全的地方,望不吝賜教2023-12-12
Java 自定義動(dòng)態(tài)數(shù)組方式
這篇文章主要介紹了Java自定義動(dòng)態(tài)數(shù)組方式，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。一起跟隨小編過(guò)來(lái)看看吧2021-03-03
jdk7 中HashMap的知識(shí)點(diǎn)總結(jié)
HashMap的原理是老生常談了，不作仔細(xì)解說(shuō)。一句話概括為HashMap是一個(gè)散列表，它存儲(chǔ)的內(nèi)容是鍵值對(duì)(key-value)映射。這篇文章主要總結(jié)了關(guān)于jdk7 中HashMap的知識(shí)點(diǎn),需要的朋友可以參考借鑒，一起來(lái)看看吧。2017-01-01
這篇文章主要為大家區(qū)分了java創(chuàng)建線程的兩種方法，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下2017-06-06
Spring實(shí)現(xiàn)定時(shí)任務(wù)的幾種方式總結(jié)
Spring Task 是 Spring 框架提供的一種任務(wù)調(diào)度和異步處理的解決方案,可以按照約定的時(shí)間自動(dòng)執(zhí)行某個(gè)代碼邏輯它可以幫助開發(fā)者在 Spring 應(yīng)用中輕松地實(shí)現(xiàn)定時(shí)任務(wù)、異步任務(wù)等功能,提高應(yīng)用的效率和可維護(hù)性,需要的朋友可以參考下本文2024-07-07
Spring的IOC解決程序耦合的實(shí)現(xiàn)
本文主要介紹了Spring的IOC解決程序耦合的實(shí)現(xiàn),文中通過(guò)示例代碼介紹的非常詳細(xì),對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值,需要的朋友們下面隨著小編來(lái)一起學(xué)習(xí)學(xué)習(xí)吧2024-07-07
這篇文章主要為大家詳細(xì)介紹了基于java實(shí)現(xiàn)畫圖板功能，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下2022-01-01
教你在一分鐘之內(nèi)理解Java Lambda表達(dá)式并學(xué)會(huì)使用
今天給大家?guī)У奈恼率荍ava8新特性的相關(guān)知識(shí),文章圍繞著如何在一分鐘之內(nèi)理解Java Lambda表達(dá)式并學(xué)會(huì)使用展開,文中有非常詳細(xì)的介紹,需要的朋友可以參考下2021-06-06
MyBatis多對(duì)多一對(duì)多關(guān)系查詢嵌套處理
這篇文章主要為大家介紹了MyBatis多對(duì)多一對(duì)多關(guān)系查詢嵌套處理示例詳解，有需要的朋友可以借鑒參考下，希望能夠有所幫助，祝大家多多進(jìn)步，早日升職加薪2023-10-10
Java 創(chuàng)建動(dòng)態(tài)類和查看方法列表信息的實(shí)例
這篇文章主要介紹了 Java 創(chuàng)建動(dòng)態(tài)類和查看方法列表信息的實(shí)例的相關(guān)資料,需要的朋友可以參考下2017-06-06