【開(kāi)源項(xiàng)目學(xué)習(xí)】若依前后端分離版，通俗易懂，快速上手
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3、驗(yàn)證碼的后端實(shí)現(xiàn) P3 - 05:55
?VO -?A Value Object [1][2] represents itself a fixed set of data and is similar to a Java enum. A Value Object's identity is based on their state rather than on their object identity and is immutable. A real world example would be Color.RED, Color.BLUE, SEX.FEMALE etc.
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