无法找到配置，因为找不到Bean验证提供程序-Vaadin 14 Spring Boot

编程问答 2022-06-12

问题描述

我正在尝试将CRUD-add-on与Vaadin 14一起使用。但是当我尝试运行此视图时：

@Route("configuration")
@JsModule("./styles/shared-styles.js")
@CssImport("./styles/views/main/main-view.css")
public class ConfigurationView extends AppLayout {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    public ConfigurationView(YoloObjectService yoloObjectService,ObjectNameService objectNameService) {
        
        System.out.println(yoloObjectService == null);
        System.out.println(objectNameService == null);
        // crud instance
        GridCrud<YoloObjectEntity> crud = new GridCrud<>(YoloObjectEntity.class);

        // grid configuration
        crud.getGrid().setColumns("email","active","objectName","threshold");
        crud.getGrid().setColumnReorderingAllowed(true);

        // form configuration
        crud.getCrudFormFactory().setUseBeanValidation(true);
        crud.getCrudFormFactory().setVisibleProperties("email","threshold","objectName");
        crud.getCrudFormFactory().setFieldProvider("objectName",new ComboBoxProvider<>("Object Name",objectNameService.findAll(),new TextRenderer<>(ObjectNameEntity::getName),ObjectNameEntity::getName));

        // layout configuration
        setContent(crud);
        crud.setFindAllOperationVisible(false);

        // logic configuration
        crud.setOperations(() -> yoloObjectService.findAll(),user -> yoloObjectService.save(user),user -> yoloObjectService.delete(user)
        );
    }
}

由于上述crud.getCrudFormFactory().setUseBeanValidation(true);，我收到此错误。

    Caused by: javax.validation.NoProviderFoundException: Unable to create a Configuration,because no Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath.
    at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:291) ~[validation-api-2.0.1.Final.jar:na]
    at javax.validation.Validation.buildDefaultValidatorFactory(Validation.java:103) ~[validation-api-2.0.1.Final.jar:na]
    ... 83 common frames omitted

2020-09-22 13:59:37.019 ERROR 10778 --- [nio-8080-exec-3] c.v.flow.server.DefaultErrorHandler      : 

java.lang.IllegalStateException: BeanValidationBinder cannot be used because a JSR-303 Bean Validation implementation not found on the classpath or could not be initialized. Use Binder instead
    at com.vaadin.flow.data.binder.BeanValidationBinder.<init>(BeanValidationBinder.java:85) ~[flow-data-2.3.4.jar:2.3.4]
    at com.vaadin.flow.data.binder.BeanValidationBinder.<init>(BeanValidationBinder.java:61) ~[flow-data-2.3.4.jar:2.3.4]

这是我的pom.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.example.application</groupId>
    <artifactId>my-project</artifactId>
    <name>My Project</name>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <vaadin.version>14.3.4</vaadin.version>
        <dl4j-master.version>1.0.0-beta7</dl4j-master.version>
        <sarxos.version>0.3.12</sarxos.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.2.RELEASE</version>
    </parent>

    <repositories>
        <!-- The order of definitions matters. Explicitly defining central here 
            to make sure it has the highest priority. -->

        <!-- Main Maven repository -->
        <repository>
            <id>central</id>
            <url>https://repo.maven.apache.org/maven2</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <!-- Repository used by many Vaadin add-ons -->
        <repository>
            <id>Vaadin Directory</id>
            <url>https://maven.vaadin.com/vaadin-addons</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

    <pluginRepositories>
        <!-- Main Maven repository -->
        <pluginRepository>
            <id>central</id>
            <url>https://repo.maven.apache.org/maven2</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.vaadin</groupId>
                <artifactId>vaadin-bom</artifactId>
                <version>${vaadin.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>com.vaadin</groupId>
            <!-- Replace artifactId with vaadin-core to use only free components -->
            <artifactId>vaadin</artifactId>
            <exclusions>
                <!-- Webjars are only needed when running in Vaadin 13 compatibility 
                    mode -->
                <exclusion>
                    <groupId>com.vaadin.webjar</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.webjars.bowergithub.insites</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.webjars.bowergithub.polymer</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.webjars.bowergithub.polymerelements</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.webjars.bowergithub.vaadin</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.webjars.bowergithub.webcomponents</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-spring-boot-starter</artifactId>
            <exclusions>
                <!-- Excluding so that webjars are not included. -->
                <exclusion>
                    <groupId>com.vaadin</groupId>
                    <artifactId>vaadin-core</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.vaadin.artur</groupId>
            <artifactId>a-vaadin-helper</artifactId>
            <version>1.2.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-testbench</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>io.github.bonigarcia</groupId>
            <artifactId>webdrivermanager</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <!-- Projekt Lombok för att slippa Getters and Setters -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- For Detection with DL4J -->
        <dependency>
            <groupId>org.deeplearning4j</groupId>
            <artifactId>deeplearning4j-datasets</artifactId>
            <version>${dl4j-master.version}</version>
        </dependency>
        <dependency>
            <groupId>org.deeplearning4j</groupId>
            <artifactId>deeplearning4j-zoo</artifactId>
            <version>${dl4j-master.version}</version>
        </dependency>

        <!-- Camera -->
        <dependency>
            <groupId>com.github.sarxos</groupId>
            <artifactId>webcam-capture</artifactId>
            <version>${sarxos.version}</version>
        </dependency>

        <!-- CRUD -->
        <dependency>
            <groupId>org.vaadin.crudui</groupId>
            <artifactId>crudui</artifactId>
            <version>4.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>
    </dependencies>

    <build>
        <defaultGoal>spring-boot:run</defaultGoal>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <!-- Clean build and startup time for Vaadin apps sometimes may exceed 
                    the default Spring Boot's 30sec timeout. -->
                <configuration>
                    <wait>500</wait>
                    <maxAttempts>240</maxAttempts>
                </configuration>
            </plugin>

            <!-- Take care of synchronizing java dependencies and imports in package.json 
                and main.js files. It also creates webpack.config.js if not exists yet. -->
            <plugin>
                <groupId>com.vaadin</groupId>
                <artifactId>vaadin-maven-plugin</artifactId>
                <version>${vaadin.version}</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>prepare-frontend</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <profiles>
        <profile>
            <!-- Production mode is activated using -Pproduction -->
            <id>production</id>
            <properties>
                <vaadin.productionMode>true</vaadin.productionMode>
            </properties>

            <dependencies>
                <dependency>
                    <groupId>com.vaadin</groupId>
                    <artifactId>flow-server-production-mode</artifactId>
                </dependency>
            </dependencies>

            <build>
                <plugins>
                    <plugin>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-maven-plugin</artifactId>
                        <configuration>
                            <jvmArguments>-Dvaadin.productionMode</jvmArguments>
                        </configuration>
                    </plugin>
                    <plugin>
                        <groupId>com.vaadin</groupId>
                        <artifactId>vaadin-maven-plugin</artifactId>
                        <version>${vaadin.version}</version>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>build-frontend</goal>
                                </goals>
                                <phase>compile</phase>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>

        <profile>
            <id>it</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-maven-plugin</artifactId>
                        <executions>
                            <execution>
                                <id>start-spring-boot</id>
                                <phase>pre-integration-test</phase>
                                <goals>
                                    <goal>start</goal>
                                </goals>
                            </execution>
                            <execution>
                                <id>stop-spring-boot</id>
                                <phase>post-integration-test</phase>
                                <goals>
                                    <goal>stop</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>

                    <!-- Runs the integration tests (*IT) after the server is started -->
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-failsafe-plugin</artifactId>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>integration-test</goal>
                                    <goal>verify</goal>
                                </goals>
                            </execution>
                        </executions>
                        <configuration>
                            <trimStackTrace>false</trimStackTrace>
                            <enableAssertions>true</enableAssertions>
                        </configuration>
                    </plugin>
                </plugins>
            </build>
        </profile>

    </profiles>
</project>

重现问题：

要重现该问题，请运行项目，然后转到http://localhost:8080，然后转到configuration选项卡，然后按+符号。现在，您将有两个关于Bean验证的错误。

https://github.com/DanielMartensson/Vaadin-DL4J-YOLO-Camera-Mail-Reporter

问题：

如何找到该Bean验证程序？

解决方法

Jakarta Bean验证（以前是Java Bean验证）是一个API，您需要提供它的实现才能使用它。有两个，Hibernate Validator和Apache BVal。您可以将其中任何一个添加到您的pom.xml文件中。根据您的运行时环境，以不同的方式添加这些内容。既然您似乎正在使用Spring Boot，则可以添加以下依赖项：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

我建议您阅读this tutorial，以快速更好地理解Jakarta Bean验证。这是一个非常流行的API，将来很有可能会在其他项目中找到它。

,

如tutorial中所述，您需要有一个实际的Jakarta Bean验证器实现类。在链接的教程中，根据您的环境，列出了可以使用的可用依赖项列表。我还是建议您阅读整个教程。

因此，如果您有Java EE环境，请将其添加到pom：

<dependency>
    <groupId>org.hibernate.validator</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>6.1.5.Final</version>  /* check for the latest version at https://hibernate.org/validator/documentation/getting-started/ */
</dependency>

如果您具有Spring Boot，请尝试以下操作：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

对于Java SE，请尝试以下操作：

<dependency>
    <groupId>org.hibernate.validator</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>6.1.5.Final</version>  /* check for the latest version at https://hibernate.org/validator/documentation/getting-started/ */
</dependency>

<dependency>
    <groupId>org.glassfish</groupId>
    <artifactId>jakarta.el</artifactId>
    <version>3.0.3</version>
</dependency>
javajavaspringvaadinvaadin14

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