NotBlank, NotNull, NotEmpty 차이

javax validation : https://javaee.github.io/javaee-spec/javadocs/javax/validation/constraints/package-summary.html?utm_source=chatgpt.com

NotBlank

The annotated element must not be null and must contain at least one non-whitespace character. Accepts CharSequence.

NotNull

The annotated element must not be null. Accepts any type.

NotEmpty

The annotated element must not be null nor empty. Supported types are:

• CharSequence (length of character sequence is evaluated)
• Collection (collection size is evaluated)
• Map (map size is evaluated)
• Array (array length is evaluated)

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https://javaee.github.io/javaee-spec/javadocs/javax/validation/constraints/NotBlank.html

https://javaee.github.io/javaee-spec/javadocs/javax/validation/constraints/NotEmpty.html

https://javaee.github.io/javaee-spec/javadocs/javax/validation/constraints/NotNull.html