在java專案中寫bean校驗的時候太麻煩就用hibernate-validator來校驗，遇到了兩個問題記錄一下

@Valid不生效

在springboot中配置Validator

import org.hibernate.validator.HibernateValidator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.validation.Validation;
import
 
 javax.validation.Validator;
import javax.validation.ValidatorFactory;

@Configuration
public class ValidatorConfiguration {
    @Bean
    public Validator validator() {
        ValidatorFactory validatorFactory = Validation.byProvider(HibernateValidator.class)
                .configure()
                .
 
addProperty("hibernate.validator.fail_fast", "true")
                .buildValidatorFactory();
        Validator validator = validatorFactory.getValidator();
        return validator;
    }
}

一個報錯 javax.validation.ValidationException: HV000032: Unable to initialize org.hibernate.validator.internal.constraintvalidators.bv.size.SizeValidatorForCharSequence.

導致這個問題有兩個原因，一個是沒有引入javax.el-api，另一個是hibernate版本問題引起的

最終pom中關於hibernate校驗的依賴，請檢測是否都引入了

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>6.0.12.Final</version>
        </dependency>
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.1.Final</version>
        </dependency>
        <dependency>
            <groupId>javax.el</groupId>
            <artifactId>javax.el-api</artifactId>
            <version>3.0.0</version>
        </dependency>

一個測試示例

    @Size(min = 4, max = 6, message = "驗證碼長度應該在4-6位之間")
    @NotNull(message = "驗證碼不能為空")
    private String validateCode;

    @Max(value = 100, message = "數字最大值為20")
    @Min(value = 20, message = "數字最小值為20")
    @NotNull(message = "數字不能為空")
    private Long number;

改完pom記得在pom檔案上右鍵Maven->Reimport