36个正则表达式(开发效率提高80%)
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2022-01-03 19:06:24
目录写在前面1、整数2、正整数3、负整数4、数字5、正数(正整数 + 0)6、负数(负整数 + 0)7、浮点数8、正浮点数9、负浮点数10、浮点数11、非负浮点数(正浮点数 + 0)12、非正浮点数(...
写在前面
我们在日常的java开发中,经常需要处理一些字符串,这个时候正则表达式是非常有用的。几乎在所有的编程语言中都支持正则表达式。以下我将压箱底多年的干货搬出来给大家参考,都是我们日常使用频次比较高的正则表达式,希望能能大大提高你的工作效率。如果本文对大家有帮助,大家可以关注“tom弹架构”,后续会连载正则表达式的基础知识。
1、整数
public static final string intege = "^-?[1-9]\\d*$/"; //整数 /** 正例 */ system.out.println(pattern.matches(intege,"123")); // true system.out.println(pattern.matches(intege,"-123")); // true /** 反例 */ system.out.println(pattern.matches(intege,"abc")); // false system.out.println(pattern.matches(intege,"0")); // false
2、正整数
public static final string intege1 = "^[1-9]\\d*$/"; //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、负整数
public static final string intege2 = "^-[1-9]\\d*$/"; //负整数 // 正例 system.out.println(pattern.matches(intege2,"-123")); // true // 反例 system.out.println(pattern.matches(intege2,"123")); // false system.out.println(pattern.matches(intege2,"0")); // false
4、数字
public static final string num = "^([+-]?)\\d*\\.?\\d+$/"; //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、正数(正整数 + 0)
public static final string num1 = "^[1-9]\\d*|0$/"; //正数(正整数 + 0) // 正例 system.out.println(pattern.matches(num1,"123")); // true system.out.println(pattern.matches(num1,"0")); // true // 反例 system.out.println(pattern.matches(num1,"-123")); // false
6、负数(负整数 + 0)
public static final string num2 = "^-[1-9]\\d*|0$/"; //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、浮点数
public static final string decmal = "^([+-]?)\\d*\\.\\d+$/"; //浮点数 // 正例 system.out.println(pattern.matches(decmal,"-0.1")); // true system.out.println(pattern.matches(decmal,"0.1")); // true // 反例 system.out.println(pattern.matches(decmal,"a.b")); // false
8、正浮点数
public static final string decmal1 = "^[1-9]\\d*.\\d*|0.\\d*[1-9]\\d*$"; //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、负浮点数
public static final string decmal2 = "^-([1-9]\\d*.\\d*|0.\\d*[1-9]\\d*)$"; //负浮点数 // 正例 system.out.println(pattern.matches(decmal2,"-0.1")); // true // 反例 system.out.println(pattern.matches(decmal2,"0.1")); // false
10、浮点数
public static final string decmal3 = "^-?([1-9]\\d*.\\d*|0.\\d*[1-9]\\d*|0?.0+|0)$";//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、非负浮点数(正浮点数 + 0)
public static final string decmal4 = "^[1-9]\\d*.\\d*|0.\\d*[1-9]\\d*|0?.0+|0$"; //非负浮点数(正浮点数 + 0) // 正例 system.out.println(pattern.matches(decmal4,"0.1")); // true // 反例 system.out.println(pattern.matches(decmal4,"-0.1")); // false
12、非正浮点数(负浮点数 + 0)
public static final string decmal5 = "^(-([1-9]\\d*.\\d*|0.\\d*[1-9]\\d*))|0?.0+|0$"; //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、邮箱地址
public static final string email = "^\\w+((-\\w+)|(\\.\\w+))*\\@[a-za-z0-9]+((\\.|-)[a-za-z0-9]+)*\\.[a-za-z0-9]+$"; //邮件 // 正例 system.out.println(pattern.matches(email,"tom@gupaoedu.com")); // true // 反例 system.out.println(pattern.matches(email,"tom.gupaoedu.com")); // false
14、颜色值匹配
public static final string color = "^[a-fa-f0-9]{6}$"; //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-.\\/?%&=]*)?$"; //url // 正例 system.out.println(pattern.matches(url,"http://www.xxx.com")); // true system.out.println(pattern.matches(url,"https://www.xxx.com")); // true system.out.println(pattern.matches(url,"www.xxx.com")); // true // 反例 system.out.println(pattern.matches(url,"abcd")); // false
16、纯仅中文字符
public static final string chinese = "^[\\u4e00-\\u9fa5\\uf900-\\ufa2d]+$"; //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、仅acsii字符
public static final string ascii = "^[\\x00-\\xff]+$"; //仅acsii字符 // 正例 system.out.println(pattern.matches(ascii,"abc123")); // true // 反例 system.out.println(pattern.matches(ascii,"にそ①②③")); // false
18、邮政编码
public static final string zipcode = "^\\d{6}$"; //邮编 // 正例 system.out.println(pattern.matches(zipcode,"100000")); // true // 反例 system.out.println(pattern.matches(zipcode,"1000000")); // false
19、国内手机号码
public static final string mobile = "^(13|15|16|17|18)[0-9]{9}$"; //手机 // 正例 system.out.println(pattern.matches(zipcode,"13800138000")); // true // 反例 system.out.println(pattern.matches(zipcode,"19900010002")); // false
20、ip v4 地址
public static final string ip4 = "^(25[0-5]|2[0-4]\\d|[0-1]\\d{2}|[1-9]?\\d)\\.(25[0-5]|2[0-4]\\d|[0-1]\\d{2}|[1-9]?\\d)\\.(25[0-5]|2[0-4]\\d|[0-1]\\d{2}|[1-9]?\\d)\\.(25[0-5]|2[0-4]\\d|[0-1]\\d{2}|[1-9]?\\d)$"; //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+$"; //非空 // 正例 system.out.println(pattern.matches(notempty," abc ")); // true // 反例 system.out.println(pattern.matches(notempty,"")); // false
22、图片后缀
public static final string picture = "(.*)\\.(jpg|bmp|gif|ico|pcx|jpeg|tif|png|raw|tga|jpg|bmp|gif|ico|pcx|jpeg|tif|png|raw|tga)$"; //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、音频后缀
public static final string audio = "(.*)\\.(mp3|wma|mid|midi|wav|vqf|mp3|wma|mid|midi|wav|vqf)$"; //音频 // 正例 system.out.println(pattern.matches(audio,"tom.mp3")); // true // 反例 system.out.println(pattern.matches(audio,"tom.txt"")); // false
24、视频后缀
public static final string video = "(.*)\\.(rm|3gp|mp4|rmvb|avi|wmv|flv|vob|exe|mkv|swf|rm|3gp|mp4|rmvb|avi|wmv|flv|vob|exe|mkv|swf)$"; // 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、压缩文件后缀
public static final string rar = "(.*)\\.(rar|zip|7zip|tgz|rar|zip|7zip|tgz)$"; //压缩文件 // 正例 system.out.println(pattern.matches(rar,"tom.zip")); // true // 反例 system.out.println(pattern.matches(rar,"tom.txt"")); // false
26、日期格式
public static final string date = "^\\d{4}(\\-|\\/|\\.)\\d{1,2}\\1\\d{1,2}$"; //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、日期和时间格式
public static final string datetime = "^\\d{4}(\\-|\\/|\\.)\\d{1,2}\\1\\d{1,2}(\\s\\d{2}:)?(\\d{2}:)?(\\d{2})?$"; //日期和时间 // 正例 system.out.println(pattern.matches(datetime,"2024-10-24 23:59:59")); // true system.out.println(pattern.matches(datetime,"2024/10/24 23:59:59")); // true // 反例 system.out.println(pattern.matches(datetime,"2024年10月24日 23时59分59秒"")); // false
28、qq号码
public static final string qq = "^[1-9]*[1-9][0-9]*$"; //qq号码 // 正例 system.out.println(pattern.matches(qq,"123456")); // true // 反例 system.out.println(pattern.matches(qq,"1234567890")); // false
29、电话号码的函数(包括验证国内区号,国际区号,分机号)
public static final string tel = "^(([0\\+]\\d{2,3}-)?(0\\d{2,3})-)?(\\d{7,8})(-(\\d{3,}))?$"; //电话号码的函数(包括验证国内区号,国际区号,分机号) // 正例 system.out.println(pattern.matches(tel,"010-1234567")); // true system.out.println(pattern.matches(tel,"0100-12345678")); // true // 反例 system.out.println(pattern.matches(tel,"13800138000")); // false
30、用户名注册
public static final string username = "^[a-za-z]\\w{5,}$"; //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、字母数字组合
public static final string allstring = "^\\w+$"; //字母数字组合 // 正例 system.out.println(pattern.matches(allstring,"abc123")); // true // 反例 system.out.println(pattern.matches(allstring,"abc123%^&")); // false
32、纯字母
public static final string letter = "^[a-za-z]+$"; //字母 // 正例 system.out.println(pattern.matches(letter,"abc")); // true // 反例 system.out.println(pattern.matches(letter,"abc123")); // false
33、纯大写字母
public static final string letter_u = "^[a-z]+$"; //大写字母 // 正例 system.out.println(pattern.matches(letter_u,"abc")); // true // 反例 system.out.println(pattern.matches(letter_u,"abc")); // false
34、纯小写字母
public static final string letter_l = "^[a-z]+$"; //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、第二代身份证号码匹配
public static final string idcard = "^[1-9]([0-9]{14}|[0-9]{17})$"; //身份证 // 正例 system.out.println(pattern.matches(idcard,"100000201410241024")); // true // 反例 system.out.println(pattern.matches(idcard,"1000002014102410240")); // false
36、数字或字母
public static final string numorstr = "^[a-za-z0-9]+$";//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,"")); // false
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