hibernate - [HV000030 : No validator could be found for constraint 'javax.validation.constraints.NotEmpty' validating type 'java.lang.String'

我想强调的是，我已经搜索了此类问题，但找不到适合我的案例的解决方案。
在我的Spring Boot Webapp中，使用包javax.validation.constraints的@NotEmpty或@NotBlank批注来验证bean时，始终出现此错误:

14:04:59,426 ERROR [org.springframework.boot.web.servlet.support.ErrorPageFilter] (default task-33) Forwarding to error page from request [/registrati
on] due to exception [HV000030: No validator could be found for constraint 'javax.validation.constraints.NotEmpty' validating type 'java.lang.String'.
 Check configuration for 'username']: javax.validation.UnexpectedTypeException: HV000030: No validator could be found for constraint 'javax.validation
.constraints.NotEmpty' validating type 'java.lang.String'. Check configuration for 'username'
        at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.throwExceptionForNullValidator(ConstraintTree.java:229)
        at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getConstraintValidatorNoUnwrapping(ConstraintTree.java:310)
        at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getConstraintValidatorInstanceForAutomaticUnwrapping(Constraint
Tree.java:244)

如果我使用@NotNull批注，则没有错误，但这不是所需的行为，因为它允许空白字段。
这些是我的pom.xml依赖项:

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
          <groupId>nz.net.ultraq.thymeleaf</groupId>
          <artifactId>thymeleaf-layout-dialect</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-batch</artifactId>
       </dependency>
       <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.mariadb.jdbc</groupId>
            <artifactId>mariadb-java-client</artifactId>
            </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/net.sourceforge.nekohtml/nekohtml -->
        <dependency>
            <groupId>net.sourceforge.nekohtml</groupId>
            <artifactId>nekohtml</artifactId>
            <version>1.9.21</version><!--$NO-MVN-MAN-VER$-->
        </dependency>

        <!-- webjars -->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap</artifactId>
            <version>4.1.3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.webjars</groupId>
                    <artifactId>jquery</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.webjars/datatables -->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>datatables</artifactId>
            <version>1.10.19</version>
            <exclusions>
                <exclusion>
                    <groupId>org.webjars</groupId>
                    <artifactId>jquery</artifactId>
                </exclusion>
            </exclusions>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <!-- plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin -->
        </plugins>
    </build>


</project>

我看到 hibernate 验证程序正在工作，因为如果我不使用任何@NotEmpty或@NotBlank批注，则其他批注(例如@Size)也可以正常工作。

在我的bean中，我正在导入javax.validation.constraints。
启动我的JBoss时，出现以下有关 hibernate validator 的代码:

14:04:17,676 INFO  [org.hibernate.validator.internal.util.Version] (background-preinit) HV000001: Hibernate Validator 5.3.5.Final-redhat-2

该版本与Maven解析的hibernate-validator 6.0.11 jar版本不同。

发生了什么？也许有些依赖冲突？

感谢所有可以帮助我的人。

最佳答案

我遇到类似的错误，但...Constraints.NotEmpty' validating type 'java.lang.Long'
发生这种情况是因为我在非字符串字段中使用了@NotEmpty。

我解决了用@NotEmpty替换@Size(value=1, message= "whatever")的问题