在Kotlin控制器中验证Spring @PathVariable

data class ValidationResult(val isValid: Boolean, val errorMessage: String?)

import org.springframework.validation.annotation.Validated
import org.springframework.web.bind.annotation.GetMapping
import org.springframework.web.bind.annotation.PathVariable
import org.springframework.web.bind.annotation.RestController
import javax.validation.Valid

@RestController
@Validated
class MyController {

    @GetMapping("/my-path/{id}")
    fun validatePathVariable(@Valid @PathVariable("id") id: String): ValidationResult {
        // 进行验证逻辑，例如检查id的长度、格式等
        if (id.length < 5) {
            return ValidationResult(false, "ID长度不能小于5")
        }
        // 其他验证逻辑...

        return ValidationResult(true, null)
    }
}