What to do if java base64 is garbled

What should I do if java base64 is garbled?

java Base64 encryption and decryption Chinese garbled processing

Recommended tutorial: "java learning"

Front end: Because base64 is not friendly to Chinese support , so the Chinese needs to be encoded and then converted to base64

var sendData = {
                'inserted':encode64(encodeURIComponent(JSON.stringify(inserted)))
}

Backend: The encoding must be specified as UTF-8, otherwise the Chinese will still be garbled after decoding

URLDecoder.decode(Encodes.decodeBase64String(inserted),"UTF-8");

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