【发布时间】：2017-01-26 17:35:59
【问题描述】：
我是 spring 新手，所以我从 spring intializr 下载了用于 maven-web java 1.8 演示的 jar。我将其提取并导入到 STS 以运行 main() 文件，我得到以下异常。有人可以告诉我有什么解决方案吗？
我从网络尝试过的解决方案，但不起作用： - 尝试将 Hibernate-validator 依赖项添加到 pom - 尝试将 spring-boot-starter-tomcat 依赖添加到 pom
堆栈跟踪：
2017-01-26 12:19:32.587 INFO 3816 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@2e4b8173: startup date [Thu Jan 26 12:19:32 EST 2017]; root of context hierarchy
2017-01-26 12:19:36.442 WARN 3816 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'tomcatEmbeddedServletContainerFactory' defined in class path resource [org/springframework/boot/autoconfigure/web/EmbeddedServletContainerAutoConfiguration$EmbeddedTomcat.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpEncodingAutoConfiguration': 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.
2017-01-26 12:19:36.454 ERROR 3816 --- [ 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
Pom.xml
<?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</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.3.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-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>
申请文件：
package com.example;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
【问题讨论】：
-
Hibernate Validator 应该由
spring-boot-starter-web传递地提供。我猜想当 Maven 下载一个 jar 时它已损坏。尝试清除 Maven 的缓存，然后重新构建您的应用 -
谢谢@AndyWilkinson。我尝试使用 maven clean 进行重建，但得到了相同的结果。然后我从 .m2 文件夹中删除了所有文件夹（因为我长期使用 maven，所以我有很多文件夹）然后重新运行项目并且它工作正常。我想问题可能出在现有的 jar 版本上。
-
我还必须删除所有内容并重新开始。简单地在 pom 文件中添加所需的依赖项没有任何作用。
-
我也有同样的问题，你可以试试这个this
标签： spring spring-boot