"The Bean Validation API is on the classpath but no implementation could be found"阻止启动

Question

我正在使用Spring Tool Suite在Java中使用ReST服务。但是在第一点上，我无法启动我的第一个简单应用程序。请帮忙。我得到以下错误。[Using Java8， STS suite， Ubuntu 16.04， $Java_Home：/usr/lib/jvm/java-8-oracle

  .   ____          _            __ _ _
 /\ / ___'_ __ _ _(_)_ __  __ _    
( ( )___ | '_ | '_| | '_ / _` |    
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |___, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.4.2.RELEASE)
2018-01-28 09:37:14.658  INFO 7971 --- [           main] i.j.springbootstarter.CourseApiApp       : Starting CourseApiApp on rudresh-Vostro-14-3468 with PID 7971 (/home/rudresh/Documents/workspace-sts-3.9.2.RELEASE/course-api/target/classes started by rudresh in /home/rudresh/Documents/workspace-sts-3.9.2.RELEASE/course-api)
2018-01-28 09:37:14.667  INFO 7971 --- [           main] i.j.springbootstarter.CourseApiApp       : No active profile set, falling back to default profiles: default
2018-01-28 09:37:14.827  INFO 7971 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@6dde5c8c: startup date [Sun Jan 28 09:37:14 IST 2018]; root of context hierarchy
2018-01-28 09:37:16.551  WARN 7971 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$StringHttpMessageConverterConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'spring.http.encoding-org.springframework.boot.autoconfigure.web.HttpEncodingProperties': Initialization of bean failed; nested exception is javax.validation.ValidationException: Unable to create a Configuration, because no Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath.
2018-01-28 09:37:16.552  INFO 7971 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans on shutdown
2018-01-28 09:37:16.568  INFO 7971 --- [           main] utoConfigurationReportLoggingInitializer : 
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-01-28 09:37:16.578 ERROR 7971 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 
***************************
APPLICATION FAILED TO START
***************************
Description:
The Bean Validation API is on the classpath but no implementation could be found
Action:
Add an implementation, such as Hibernate Validator, to the classpath

下面是我的POM.xml文件。整个示例取自YouTube上的JavaBrains教程，以供参考。我怀疑环境或休眠验证存在一些问题，我没有在我的系统中安装。

<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>io.javabrains.springbootquickstart</groupId>
  <artifactId>course-api</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>Java Brains Course Api</name>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.2.RELEASE</version>
  </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-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>
"This is main class to start SpringBoot application. Although it does not do anything but it should at least redirect to browser Error page."

package io.javabrains.springbootstarter;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class CourseApiApp {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        SpringApplication.run(CourseApiApp.class, args);
    }
}

Answer 1

就我而言，我添加了以下依赖项及其工作，即使我不需要任何验证，也许 Java 更新导致了这个问题。

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

Answer 2

从项目中删除<user_home>/.m2/repository and try "maven --> install所有文件。

文件似乎已损坏。因此，为了正确下载文件，请尝试此过程。

根本不需要添加任何其他依赖项。"web"注入缺少的验证器。

这里有同样的问题，通过执行此过程解决了。你只需要这样做一次，然后你就可以再去一次了。(有时 - 不要问为什么 - 本地 M2 存储库损坏(。

希望对您有所帮助。问候，Ivan

Answer 3

我遇到了同样的问题。我的项目已经生产了将近一年，本周我需要进行一些更改，令人惊讶的是，该项目甚至无法构建。我通过将以下依赖项添加到我的项目中解决了这个问题。

<dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>${your-desired-version-matching-project-own}</version>
</dependency>

注意：我正在使用弹簧启动器依赖项，但仍然没有加载该依赖项。

Answer 4

我知道

这很旧，但以下内容对我有用。

注释 格拉德尔

implementation(group: 'org.springframework.boot', name: 'spring-boot-starter-validation', version:'2.7.8'
      exclude(module: 'spring-boot-starter-logging')
      exclude(module: 'spring-boot-starter-tomcat')

希望这对某人有所帮助。