使用正则表达式生成随机数据的方法

sdnxiaotao

2020-02-06

从正则表达式生成随机数据

项目地址

https://github.com/GitHub-Laziji/reverse-regexp

安装

git clone https://github.com/GitHub-Laziji/reverse-regexp.git
cd reverse-regexp
mvn install

<dependency>
  <groupId>org.laziji.commons</groupId>
  <artifactId>reverse-regexp</artifactId>
  <version>1.0-SNAPSHOT</version>
</dependency>

使用

随机字符语法

支持大部分正则表达式的匹配语法

\d 数字, 相当于[0-9]
\w 数字、字母加下划线, 相当于[0-9a-zA-Z_]
\s 空白字符, 只包含空格和制表符
. 除\n和\r以外的任意字符, 生成随机字符时只在ascii码0~255之间生成
[a-zA-Z甲乙] 区间, 不支持^语法
以及其他字符

重复打印语法

与正则表达式的重复匹配语法相同

? 随机生成0个或1个字符
* 随机生成0个以上字符, 默认最多16个
+ 随机生成1个以上字符, 默认最多16个
{n} 生成n个字符
{n,} 随机生成n~个字符, 默认最多max(16,n)个
{n,m} 随机生成n~m个字符

其他语法

| 或语法, 例如aaa|bbb|ccc随机生成aaa或bbb或ccc, 概率相等
() 支持括号

public class MainTest {

  @Test
  public void test() throws RegexpIllegalException, UninitializedException, TypeNotMatchException {
    
    random("\\w{6,12}@[a-z0-9]{3}\\.(com|cn)", "邮箱");
    random("1(3|5|7|8)\\d{9}", "手机号");
    random("-?[1-9]\\d*\\.\\d+", "浮点数");
    random("https?://[\\w-]+(\\.[\\w-]+){1,2}(/[\\w-]{3,6}){0,2}(\\?[\\w_]{4,6}=[\\w_]{4,6}(&[\\w_]{4,6}=[\\w_]{4,6}){0,2})?", "网址");
  }
  
  private void random(String expression, String title)
      throws RegexpIllegalException, TypeNotMatchException, UninitializedException {
    
    System.out.println(title + " " + expression);
    Node node = new OrdinaryNode(expression);
    Pattern pattern = Pattern.compile(node.getExpression());
    for (int i = 0; i < 10; i++) {
      String data = node.random();
      System.out.println("[" + pattern.matcher(data).matches() + "] " + data);
    }
    System.out.println();
  }

}

输出
邮箱 \w{6,12}@[a-z0-9]{3}\.(com|cn)
[true] [email protected]
[true] [email protected]
[true] [email protected]
[true] [email protected]
[true] [email protected]
[true] [email protected]
[true] [email protected]
[true] [email protected]
[true] [email protected]
[true] [email protected]
手机号 1(3|5|7|8)\d{9}
[true] 18263364656
[true] 17539493178
[true] 17452542895
[true] 15190699623
[true] 13441385631
[true] 15450856416
[true] 18651247283
[true] 13835809899
[true] 18595798569
[true] 17115703866
浮点数 -?[1-9]\d*\.\d+
[true] 8148340336.1501586550282701
[true] -3339660539.406
[true] -51.6120243661611419
[true] -731621835440468.9708278
[true] -27438753435.9137579
[true] 393811376.777268751417
[true] 3286498432415.3962664603
[true] -5299652275.9
[true] 216.93676279820770
[true] 34.36843273
网址 https?://[\w-]+(\.[\w-]+){1,2}(/[\w-]{3,6}){0,2}(\?[\w_]{4,6}=[\w_]{4,6}(&[\w_]{4,6}=[\w_]{4,6}){0,2})?
[true] https://a_fl.thx/4_4
[true] http://v3YTuJ0Gu-5z8.JGhpdLe/V2j/ndL-UO
[true] https://FuMG-gafEc.R2FRRtLyX/ahg
[true] https://5phYVK9.wh7vl9z3AAZVg.z-yQSiMTdQw8S9-/WKCd
[true] https://T9dntbI.4Su8vxYhCr6?T85gV=R6TYtm&1c97x=nCTyA5
[true] http://qHyDgqBtYwq6Stg8.I6gb-M_ripkiEafK?ZLxy=Itny&RmsTX=X7KEuW&bwuk2=frcjO6
[true] http://UJ.Yb3foKTJKy-uqKUl.ZXrrFUk9K/Dcymu?W2tasq=oqzS&hYGWD=MF6l&FMHOi=F6ct8T
[true] https://BY_iS.tnlclAvxMkuO.T90G5XETj/cQncGI
[true] http://hG.li8Nzv.uaGokB/CTnrqp
[true] https://huZmN.v-LtoY/Dyl/peq?NUmt=__QDXG&8GBY=wZ8M&AkKZl4=8NZfEt