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[Source] Java generates a specified number of bits (numeric captchas)

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Posted on 9/28/2021 4:48:17 PM | | | |
Requirements: To generate a digital verification code according to the specified length, scenario: When the website performs the operation of unbinding or rebinding, the system will send a text message with a verification code to the mobile phone number.

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Generate a 4-digit random number and generate a 6-digit random number with the following rendering:



The code is as follows:







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