寫在前面
我們在日常的JAVA開發中,經常需要處理一些字符串,這個時候正則表達式是非常有用的。幾乎在所有的編程語言中都支持正則表達式。以下我將壓箱底多年的干貨搬出來給大家參考,都是我們日常使用頻次比較高的正則表達式,希望能能大大提高你的工作效率。如果本文對大家有幫助,大家可以關注“Tom彈架構”,后續會連載正則表達式的基礎知識。
1、整數
public static final String intege = "^-?[1-9]\d*$/"; //整數
/** 正例 */
System.out.println(Pattern.matches(intege,"123")); // true
System.out.println(Pattern.matches(intege,"-123")); // true
/** 反例 */
System.out.println(Pattern.matches(intege,"abc")); // false
System.out.println(Pattern.matches(intege,"0")); // false
2、正整數
public static final String intege1 = "^[1-9]\d*$/"; //正整數
// 正例
System.out.println(Pattern.matches(intege1,"123")); // true
// 反例
System.out.println(Pattern.matches(intege1,"-123")); // false
System.out.println(Pattern.matches(intege1,"0")); // false
3、負整數
public static final String intege2 = "^-[1-9]\d*$/"; //負整數
// 正例
System.out.println(Pattern.matches(intege2,"-123")); // true
// 反例
System.out.println(Pattern.matches(intege2,"123")); // false
System.out.println(Pattern.matches(intege2,"0")); // false
4、數字
public static final String num = "^([+-]?)\d*\.?\d+$/"; //數字
// 正例
System.out.println(Pattern.matches(num,"123")); // true
System.out.println(Pattern.matches("0")); // true
// 反例
System.out.println(Pattern.matches(num,"a123")); // false
5、正數(正整數 + 0)
public static final String num1 = "^[1-9]\d*|0$/"; //正數(正整數 + 0)
// 正例
System.out.println(Pattern.matches(num1,"123")); // true
System.out.println(Pattern.matches(num1,"0")); // true
// 反例
System.out.println(Pattern.matches(num1,"-123")); // false
6、負數(負整數 + 0)
public static final String num2 = "^-[1-9]\d*|0$/"; //負數(負整數 + 0)
// 正例
System.out.println(Pattern.matches(num2,"-123")); // true
System.out.println(Pattern.matches(num2,"0")); // true
// 反例
System.out.println(Pattern.matches(num2,"123")); // false
7、浮點數
public static final String decmal = "^([+-]?)\d*\.\d+$/"; //浮點數
// 正例
System.out.println(Pattern.matches(decmal,"-0.1")); // true
System.out.println(Pattern.matches(decmal,"0.1")); // true
// 反例
System.out.println(Pattern.matches(decmal,"a.b")); // false
8、正浮點數
public static final String decmal1 = "^[1-9]\d*.\d*|0.\d*[1-9]\d*$"; //正浮點數
// 正例
System.out.println(Pattern.matches(decmal1,"0.1")); // true
// 反例
System.out.println(Pattern.matches(decmal1,"-0.1")); // false
9、負浮點數
public static final String decmal2 = "^-([1-9]\d*.\d*|0.\d*[1-9]\d*)$"; //負浮點數
// 正例
System.out.println(Pattern.matches(decmal2,"-0.1")); // true
// 反例
System.out.println(Pattern.matches(decmal2,"0.1")); // false
10、浮點數
public static final String decmal3 = "^-?([1-9]\d*.\d*|0.\d*[1-9]\d*|0?.0+|0)$";//浮點數
// 正例
System.out.println(Pattern.matches(decmal3,"-0.1")); // true
System.out.println(Pattern.matches(decmal3,"0.1")); // true
// 反例
System.out.println(Pattern.matches(decmal3,"a.b")); // false
11、非負浮點數(正浮點數 + 0)
public static final String decmal4 = "^[1-9]\d*.\d*|0.\d*[1-9]\d*|0?.0+|0$"; //非負浮點數(正浮點數 + 0)
// 正例
System.out.println(Pattern.matches(decmal4,"0.1")); // true
// 反例
System.out.println(Pattern.matches(decmal4,"-0.1")); // false
12、非正浮點數(負浮點數 + 0)
public static final String decmal5 = "^(-([1-9]\d*.\d*|0.\d*[1-9]\d*))|0?.0+|0$"; //非正浮點數(負浮點數 + 0)
// 正例
System.out.println(Pattern.matches(decmal5,"-0.1")); // true
// 反例
System.out.println(Pattern.matches(decmal5,"0.1")); // false
13、郵箱地址
public static final String email = "^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$"; //郵件
// 正例
System.out.println(Pattern.matches(email,"tom@gupaoedu.com")); // true
// 反例
System.out.println(Pattern.matches(email,"tom.gupaoedu.com")); // false
14、顏色值匹配
public static final String color = "^[a-fA-F0-9]{6}$"; //顏色
// 正例
System.out.println(Pattern.matches(color,"ffffff")); // true
System.out.println(Pattern.matches(color,"FFFFFF")); // true
// 反例
System.out.println(Pattern.matches(color,"#FFFFFF")); // false
System.out.println(Pattern.matches(color,"white")); // false
15、url匹配
public static final String url = "^http[s]?:\/\/([\w-]+\.)+[\w-]+([\w-.\/?%&=]*)?$"; //url
// 正例
System.out.println(Pattern.matches(url,"http://www.xxx.com")); // true
System.out.println(Pattern.matches(url,"https://www.xxx.com")); // true
System.out.println(Pattern.matches(url,"www.xxx.com")); // true
// 反例
System.out.println(Pattern.matches(url,"abcd")); // false
16、純僅中文字符
public static final String chinese = "^[\u4E00-\u9FA5\uF900-\uFA2D]+$"; //僅中文
// 正例
System.out.println(Pattern.matches(chinese,"湯姆彈架構")); // true
// 反例
System.out.println(Pattern.matches(chinese,"Tom彈架構")); // false
17、僅ACSII字符
public static final String ascii = "^[\x00-\xFF]+$"; //僅ACSII字符
// 正例
System.out.println(Pattern.matches(ascii,"abc123")); // true
// 反例
System.out.println(Pattern.matches(ascii,"にそ①②③")); // false
18、郵政編碼
public static final String zipcode = "^\d{6}$"; //郵編
// 正例
System.out.println(Pattern.matches(zipcode,"100000")); // true
// 反例
System.out.println(Pattern.matches(zipcode,"1000000")); // false
19、國內手機號碼
public static final String mobile = "^(13|15|16|17|18)[0-9]{9}$"; //手機
// 正例
System.out.println(Pattern.matches(zipcode,"13800138000")); // true
// 反例
System.out.println(Pattern.matches(zipcode,"19900010002")); // false
20、IP V4 地址
public static final String ip4 = "^(25[0-5]|2[0-4]\d|[0-1]\d{2}|[1-9]?\d)\.(25[0-5]|2[0-4]\d|[0-1]\d{2}|[1-9]?\d)\.(25[0-5]|2[0-4]\d|[0-1]\d{2}|[1-9]?\d)\.(25[0-5]|2[0-4]\d|[0-1]\d{2}|[1-9]?\d)$"; //ip地址
// 正例
System.out.println(Pattern.matches(zipcode,"127.0.0.1")); // true
// 反例
System.out.println(Pattern.matches(zipcode,"aa.bb.cc.dd")); // false
21、非空字符
public static final String notempty = "^\S+$"; //非空
// 正例
System.out.println(Pattern.matches(notempty," abc ")); // true
// 反例
System.out.println(Pattern.matches(notempty,"")); // false
22、圖片后綴
public static final String picture = "(.*)\.(jpg|bmp|gif|ico|pcx|jpeg|tif|png|raw|tga|JPG|BMP|GIF|ICO|PCX|JPEG|TIF|PNG|RAW|TGA)$"; //圖片
// 正例
System.out.println(Pattern.matches(picture,"tom.jpg")); // true
// 反例
System.out.println(Pattern.matches(picture,"tom.txt"")); // false
23、音頻后綴
public static final String audio = "(.*)\.(mp3|wma|mid|midi|wav|vqf|MP3|WMA|MID|MIDI|WAV|VQF)$"; //音頻
// 正例
System.out.println(Pattern.matches(audio,"tom.mp3")); // true
// 反例
System.out.println(Pattern.matches(audio,"tom.txt"")); // false
24、視頻后綴
public static final String video = "(.*)\.(rm|3gp|mp4|rmvb|avi|wmv|flv|vob|exe|mkv|swf|RM|3GP|MP4|RMVB|AVI|WMV|FLV|VOB|EXE|MKV|SWF)$"; // 視頻格式
// 正例
System.out.println(Pattern.matches(video,"tom.mp4")); // true
// 反例
System.out.println(Pattern.matches(video,"tom.txt"")); // false
25、壓縮文件后綴
public static final String rar = "(.*)\.(rar|zip|7zip|tgz|RAR|ZIP|7ZIP|TGZ)$"; //壓縮文件
// 正例
System.out.println(Pattern.matches(rar,"tom.zip")); // true
// 反例
System.out.println(Pattern.matches(rar,"tom.txt"")); // false
26、日期格式
public static final String date = "^\d{4}(\-|\/|\.)\d{1,2}\1\d{1,2}$"; //日期
// 正例
System.out.println(Pattern.matches(date,"2024-10-24")); // true
System.out.println(Pattern.matches(date,"2024/10/24")); // true
// 反例
System.out.println(Pattern.matches(date,"2024年10月24日"")); // false
27、日期和時間格式
public static final String datetime = "^\d{4}(\-|\/|\.)\d{1,2}\1\d{1,2}(\s\d{2}:)?(\d{2}:)?(\d{2})?$"; //日期和時間
// 正例
System.out.println(Pattern.matches(datetime,"2024-10-24 23:59:59")); // true
System.out.println(Pattern.matches(datetime,"2024/10/24 23:59:59")); // true
// 反例
System.out.println(Pattern.matches(datetime,"2024年10月24日 23時59分59秒"")); // false
28、QQ號碼
public static final String qq = "^[1-9]*[1-9][0-9]*$"; //QQ號碼
// 正例
System.out.println(Pattern.matches(qq,"123456")); // true
// 反例
System.out.println(Pattern.matches(qq,"1234567890")); // false
29、電話號碼的函數(包括驗證國內區號,國際區號,分機號)
public static final String tel = "^(([0\+]\d{2,3}-)?(0\d{2,3})-)?(\d{7,8})(-(\d{3,}))?$"; //電話號碼的函數(包括驗證國內區號,國際區號,分機號)
// 正例
System.out.println(Pattern.matches(tel,"010-1234567")); // true
System.out.println(Pattern.matches(tel,"0100-12345678")); // true
// 反例
System.out.println(Pattern.matches(tel,"13800138000")); // false
30、用戶名注冊
public static final String username = "^[A-Za-z]\w{5,}$"; //用來用戶注冊。匹配由數字、26個英文字母或者下劃線組成的字符串
// 正例
System.out.println(Pattern.matches(username,"gupaoedutom")); // true
// 反例
System.out.println(Pattern.matches(username,"tom@gupaoedu")); // false
31、字母數字組合
public static final String allstring = "^\w+$"; //字母數字組合
// 正例
System.out.println(Pattern.matches(allstring,"abc123")); // true
// 反例
System.out.println(Pattern.matches(allstring,"abc123%^&")); // false
32、純字母
public static final String letter = "^[A-Za-z]+$"; //字母
// 正例
System.out.println(Pattern.matches(letter,"abc")); // true
// 反例
System.out.println(Pattern.matches(letter,"abc123")); // false
33、純大寫字母
public static final String letter_u = "^[A-Z]+$"; //大寫字母
// 正例
System.out.println(Pattern.matches(letter_u,"ABC")); // true
// 反例
System.out.println(Pattern.matches(letter_u,"abc")); // false
34、純小寫字母
public static final String letter_l = "^[a-z]+$"; //小寫字母
// 正例
System.out.println(Pattern.matches(letter_l,"abc")); // true
// 反例
System.out.println(Pattern.matches(letter_l,"ABC")); // false
35、第二代身份證號碼匹配
public static final String idcard = "^[1-9]([0-9]{14}|[0-9]{17})$"; //身份證
// 正例
System.out.println(Pattern.matches(idcard,"100000201410241024")); // true
// 反例
System.out.println(Pattern.matches(idcard,"1000002014102410240")); // false
36、數字或字母
public static final String numOrStr = "^[A-Za-z0-9]+$";//數字或字母
// 正例
System.out.println(Pattern.matches(numOrStr,"abc123")); // true
System.out.println(Pattern.matches(numOrStr,"abc")); // true
System.out.println(Pattern.matches(numOrStr,"123")); // true
// 反例
System.out.println(Pattern.matches(numOrStr,"Tom彈架構")); // false
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