如何将utf-8mb4更改为UTF-8？ [英] How to change utf-8mb4 to UTF-8 in groovy?

问题描述

目前，我从用户手机接收字符串输入有问题。
输入的字符串包含utf8mb4字符（笑脸，表情符号等）。
这导致我的后端（mysql）中的错误，因为它只接受utf-8输入。

Currently, I have a problem with receiving string input from user mobile. The string was inputed and contained utf8mb4 characters (smiley, emoji, etc). This caused error in my backend (mysql) since it only accepts utf-8 input.

现在，如何将utf-8mb4的所有输入替换为utf-8？

Now, how can I just replace all utf-8mb4 input to utf-8?

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