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这是我的数据

{
    "data":"123,123456,345123,230,444123444,444,5555",
    "test": "123"
}

我想123必须在data里面,并且123前后不能有数字,比如说1234他有123但是不想,他后面有4


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/(^|D)(123|230)(D|$)/

然后你取捕获组内的内容就好


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