“Bean Validation API 在类路径上，但找不到实现"阻止启动 [英] "The Bean Validation API is on the classpath but no implementation could be found" preventing startup

问题描述

我正在使用 Spring Tool Suite 来处理 Java 中的 ReST 服务.但是一开始我无法启动我的第一个简单应用程序.请帮忙.我得到低于错误.[使用 Java8，STS 套件，Ubuntu 16.04，$Java_Home:/usr/lib/jvm/java-8-oracle

I am using Spring Tool Suite to work with ReST services in Java. But at the very first point I am not able to start my first simple application. Please help. I am getting below error. [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.我怀疑我的系统中没有安装的环境或休眠验证存在一些问题.

Below is my POM.xml file. The whole example is taken from JavaBrains tutorial on YouTube for reference purpose. I suspect some issue either with Environment or the Hibernate validation which i have not installed in my system.

<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);
    }

}

推荐答案

就我而言，我添加了以下依赖项并且它起作用了，即使我不需要任何验证，也可能是 Java 更新导致了这个问题.

In my case, I added the following dependency and its worked, Even I do not need any validation, maybe the Java update caused this issue.

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

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