此版本仍在开发中，尚未被认为是稳定版。请使用最新稳定版 Spring Shell 4.0.1！spring-doc.cadn.net.cn

选项验证

Spring Shell 通过与 Bean Validation API 集成，支持命令参数上的自动和自文档化约束。spring-doc.cadn.net.cn

注解应用于命令参数时会被认可，并在命令执行之前触发验证。考虑以下命令：spring-doc.cadn.net.cn

@Command(name = "change-password", description = "Change password", group = "User Management",
		help = "A command that changes the user password. Usage: change-password [-p | --password]=<password>")
public String changePassword(
		@Option(shortName = 'p', longName = "password") @Size(min = 8, max = 40) String password) {
	return "Password successfully set to " + password;
}

从前面的例子中，你可以免费获得以下行为：spring-doc.cadn.net.cn

$>change-password --password=hello
The following constraints were not met:
	--password: size must be between 8 and 40
Error while executing command change-password: USAGE_ERROR