Spring Boot无法正常工作？

Question

I have generate a standard spring boot sample using command

spring init

The outcome is a plain Java project with a pom like

 <?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>org.test</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>1.2.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <start-class>demo.DemoApplication</start-class>
        <java.version>1.7</java.version>
    </properties>

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

When I hit

spring run src/main/java/demo/DemoApplication.java

It kicks me out with an error message such as

 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'propertySourceBootstrapConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private java.util.List org.springframework.cloud.bootstrap.config.PropertySourceBootstrapConfiguration.propertySourceLocators; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'configServicePropertySource' defined in class org.springframework.cloud.bootstrap.config.PropertySourceBootstrapConfiguration$PropertySourceLocatorConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.config.client.ConfigServicePropertySourceLocator]: Factory method 'configServicePropertySource' threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/web/client/HttpServerErrorException

That I cannot explain. What am I doing wrong?

Answer 1

One of tags on this question is spring-mvc, so I assume your want to use Web Spring features. To enable Spring web features you need to add this Spring Boot this dependency into POM:

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

I haven't use Spring CLI before, therefore I am not familiar why it didn't generate project with Web dependencies. But I would bet you need to explicitly specify somehow that to want to generate web project.

So you probably generated plain Spring Boot project without web dependencies and added some web related configuration into application.properties. Therefore Spring Boot auto configurer is trying to find web dependencies on your classpath.

Answer 2

Even though this already have an answer, this same issue can come up with corrupted maven dependencies. So anyone who could not solve the same issue try deleting the artifacts (or the full local repo) from

c:\\Users\\<username>\\.m2\\repository by hand or try running mvn dependency:purge-local-repository

and reload the projects in the IDE.