[英]Spring boot sample: Unable to start embedded container error
我是春天的新手,所以我从spring intializr下载jar用于maven-web java 1.8 demo。 我解压缩并将其导入STS以运行main()文件,然后我得到以下异常。 有人可以告诉我这是什么解决方案吗?
解决方案我尝试从网络但没有工作: - 尝试将Hibernate验证器依赖添加到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
的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);
}
}
与Spring Boot的1.5.9发行版有同样的问题。 要添加Jim Kiley的答案,您应该在Maven pom.xml中添加以下内容:
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.3.6.Final</version>
</dependency>
您可以使用Spring Boot pom.xml文件的属性部分下的依赖项版本(spring-boot-dependencies-1.5.9.RELEASE.pom):
<hibernate-validator.version>5.3.6.Final</hibernate-validator.version>
位于路径下:
/.m2/repository/org/springframework/boot/spring-boot-dependencies/1.5.9.RELEASE/spring-boot-dependencies-1.5.9.RELEASE.pom
如输出所示,您需要:
将一个实现(如Hibernate Validator)添加到类路径中
由于您使用的是Maven,这意味着您需要将Hibernate Validator添加到pom.xml的依赖项中。
首先,您的pom.xml
设置是正确的。 spring-boot-starter-web
依赖于hibernate-validator
。 所以在你的项目中,你不需要指定对hibernate-validator
的依赖。 否则,使用maven的目的是什么?
回到解决方案,我为解决问题所采取的步骤是:
pom.xml
所在的项目文件夹。 运行mvn verify
该命令将再次从存储库下载缺少的jar,并检查maven本地存储库中jar的正确性(是否已损坏)。
如果您看到类似以下的警告消息:
[警告]错误读取/home/vagrant/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/8.5.6/tomcat-embed-core-8.5.6.jar; LOC标头无效(签名错误)
[警告]错误读取/home/vagrant/.m2/repository/org/hibernate/hibernate-validator/5.2.4.Final/hibernate-validator-5.2.4.Final.jar; LOC标头无效(签名错误)
[警告]错误读取/home/vagrant/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.8.4/jackson-core-2.8.4.jar; LOC标头无效(签名错误)
那么这意味着maven以前下载的罐子已经损坏了。
要更正此问题,请删除那些损坏的jar并再次运行mvn verify
以重新下载它们,并确保没有对jar的警告。
在上面的错误中, hibernate-validator-5.2.4.Final.jar
是问题的hibernate验证器。
我遇到了同样的问题并通过删除.m2下的这两个文件夹来解决它
然后程序工作。
我在运行应用程序时遇到了同样的问题,并通过删除.m2文件夹解决了问题。
.m2目录/库
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