Collect these 36 regular expressions and increase development efficiency by 80%

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In our daily Java development, we often need to deal with some strings. At this time, regular expressions are very useful. Regular expressions are supported in almost all programming languages. Below I will carry out the dry goods from the bottom of the press box for your reference. They are all regular expressions that we use frequently in daily life. I hope that it can greatly improve your work efficiency. If this article is helpful to everyone, you can pay attention to "Tom Bomb Architecture", and the basic knowledge of regular expressions will be serialized in the follow-up.

1. Integer

    public static final String intege = "^-?[1-9]\\d*$/";                    //整数
    
    /**  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. Positive integer

    public static final String intege1 = "^[1-9]\\d*$/";                    //正整数
    
    // 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. Negative integer

    public static final String intege2 = "^-[1-9]\\d*$/";                    //负整数
    
    // 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. Numbers

    public static final String num = "^([+-]?)\\d*\\.?\\d+$/";            //数字
    
    // 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. Positive number (positive integer + 0)

    public static final String num1 = "^[1-9]\\d*|0$/";                    //正数（正整数 + 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. Negative numbers (negative integer + 0)

    public static final String num2 = "^-[1-9]\\d*|0$/";                    //负数（负整数 + 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. Floating point number

    public static final String decmal = "^([+-]?)\\d*\\.\\d+$/";            //浮点数
    
    // 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. Positive floating point number

    public static final String decmal1 = "^[1-9]\\d*.\\d*|0.\\d*[1-9]\\d*$"; //正浮点数
    
    // 正例 
    System.out.println(Pattern.matches(decmal1,"0.1")); // true
    
    // 反例 
    System.out.println(Pattern.matches(decmal1,"-0.1")); // false
    

9. Negative floating point numbers

    public static final String decmal2 = "^-([1-9]\\d*.\\d*|0.\\d*[1-9]\\d*)$"; //负浮点数
    
    // 正例 
    System.out.println(Pattern.matches(decmal2,"-0.1")); // true
    
    // 反例 
    System.out.println(Pattern.matches(decmal2,"0.1")); // false
    

10. Floating point number

    public static final String decmal3 = "^-?([1-9]\\d*.\\d*|0.\\d*[1-9]\\d*|0?.0+|0)$";//浮点数
    
    // 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. Non-negative floating-point number (positive floating-point number + 0)

    public static final String decmal4 = "^[1-9]\\d*.\\d*|0.\\d*[1-9]\\d*|0?.0+|0$";  //非负浮点数（正浮点数 + 0）
    
    // 正例 
    System.out.println(Pattern.matches(decmal4,"0.1")); // true
    
    // 反例 
    System.out.println(Pattern.matches(decmal4,"-0.1")); // false
    

12. Non-positive floating-point number (negative floating-point number + 0)

    public static final String decmal5 = "^(-([1-9]\\d*.\\d*|0.\\d*[1-9]\\d*))|0?.0+|0$"; //非正浮点数（负浮点数 + 0）
    
    // 正例 
    System.out.println(Pattern.matches(decmal5,"-0.1")); // true
    
    // 反例 
    System.out.println(Pattern.matches(decmal5,"0.1")); // false
    

13. Email address

    public static final String email = "^\\w+((-\\w+)|(\\.\\w+))*\\@[A-Za-z0-9]+((\\.|-)[A-Za-z0-9]+)*\\.[A-Za-z0-9]+$"; //邮件
    
    // 正例 
    System.out.println(Pattern.matches(email,"[e-mail]")); // true
    
    // 反例 
    System.out.println(Pattern.matches(email,"tom.gupaoedu.com")); // false
    

14. Color value matching

    public static final String color = "^[a-fA-F0-9]{6}$";                //颜色
    
    // 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 matching

    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, pure Chinese characters only

    public static final String chinese = "^[\\u4E00-\\u9FA5\\uF900-\\uFA2D]+$";                    //仅中文
    
    // 正例 
    System.out.println(Pattern.matches(chinese,"汤姆弹架构")); // true
    
    // 反例 
    System.out.println(Pattern.matches(chinese,"Tom弹架构")); // false
    

17. Only ACSII characters

    public static final String ascii = "^[\\x00-\\xFF]+$";                //仅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. Postal code

    
    public static final String zipcode = "^\\d{6}$";                        //邮编
    
    // 正例 
    System.out.println(Pattern.matches(zipcode,"100000")); // true
    
    // 反例 
    System.out.println(Pattern.matches(zipcode,"1000000")); // false
    

19. Domestic mobile phone number

    public static final String mobile = "^(13|15|16|17|18)[0-9]{9}$";                //手机
    
    // 正例 
    System.out.println(Pattern.matches(zipcode,"13800138000")); // true
    
    // 反例 
    System.out.println(Pattern.matches(zipcode,"19900010002")); // false
    

20. IP V4 address

    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, non-blank characters

    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, picture suffix

    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)$";    //图片
    
    // 正例 
    System.out.println(Pattern.matches(picture,"tom.jpg")); // true
    
    // 反例 
    System.out.println(Pattern.matches(picture,"tom.txt"")); // false
    

23, audio suffix

    public static final String audio = "(.*)\\.(mp3|wma|mid|midi|wav|vqf|MP3|WMA|MID|MIDI|WAV|VQF)$";    //音频
    
        // 正例 
    System.out.println(Pattern.matches(audio,"tom.mp3")); // true
    
    // 反例 
    System.out.println(Pattern.matches(audio,"tom.txt"")); // false
    

24, video suffix

    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)$"; // 视频格式
    
    // 正例 
    System.out.println(Pattern.matches(video,"tom.mp4")); // true
    
    // 反例 
    System.out.println(Pattern.matches(video,"tom.txt"")); // false

25. Compressed file suffix

    public static final String rar = "(.*)\\.(rar|zip|7zip|tgz|RAR|ZIP|7ZIP|TGZ)$";    //压缩文件
    
    // 正例 
    System.out.println(Pattern.matches(rar,"tom.zip")); // true
    
    // 反例 
    System.out.println(Pattern.matches(rar,"tom.txt"")); // false
    

26, date format

    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. Date and time format

    public static final String datetime = "^\\d{4}(\\-|\\/|\\.)\\d{1,2}\\1\\d{1,2}(\\s\\d{2}:)?(\\d{2}:)?(\\d{2})?$";    //日期和时间
    
    // 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时59分59秒"")); // false
        

28, QQ number

    public static final String qq = "^[1-9]*[1-9][0-9]*$";        //QQ号码
    
    // 正例 
    System.out.println(Pattern.matches(qq,"123456")); // true
    
    // 反例 
    System.out.println(Pattern.matches(qq,"1234567890")); // false
        

29. Telephone number function (including verification of domestic area code, international area code, extension number)

    public static final String tel = "^(([0\\+]\\d{2,3}-)?(0\\d{2,3})-)?(\\d{7,8})(-(\\d{3,}))?$";    //电话号码的函数(包括验证国内区号,国际区号,分机号)
    
    // 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. Username registration

    public static final String username = "^[A-Za-z]\\w{5,}$";    //用来用户注册。匹配由数字、26个英文字母或者下划线组成的字符串
        
    // 正例 
    System.out.println(Pattern.matches(username,"gupaoedutom")); // true
    
    // 反例 
    System.out.println(Pattern.matches(username,"tom@gupaoedu")); // false
    

31. Alphanumeric combination

    public static final String allstring = "^\\w+$"; //字母数字组合
    
    // 正例 
    System.out.println(Pattern.matches(allstring,"abc123")); // true
    
    // 反例 
    System.out.println(Pattern.matches(allstring,"abc123%^&")); // false
    

32, pure letters

    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, pure capital letters

    public static final String letter_u = "^[A-Z]+$";                    //大写字母
    
    // 正例 
    System.out.println(Pattern.matches(letter_u,"ABC")); // true
    
    // 反例 
    System.out.println(Pattern.matches(letter_u,"abc")); // false
        

34, pure lowercase letters

    public static final String letter_l = "^[a-z]+$";                    //小写字母
    
    // 正例 
    System.out.println(Pattern.matches(letter_l,"abc")); // true
    
    // 反例 
    System.out.println(Pattern.matches(letter_l,"ABC")); // false
    

35. Second-generation ID card number matching

    public static final String idcard = "^[1-9]([0-9]{14}|[0-9]{17})$";    //身份证
    
    // 正例 
    System.out.println(Pattern.matches(idcard,"100000201410241024")); // true
    
    // 反例 
    System.out.println(Pattern.matches(idcard,"1000002014102410240")); // false
    

36, numbers or letters

    public static final String numOrStr = "^[A-Za-z0-9]+$";//数字或字母
    
    // 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弹架构")); // false
    
    

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