将 Spring boot 1.5 迁移到 2.0，无法启动应用程序获取：java.lang.ClassNotFoundException: org.springframework.boot.bind.RelaxedPropertyResolver

Question

我将现有的 Spring Boot 应用程序从 springboot 1.5 升级到了 2.0。 现在，当我尝试部署应用程序时，我收到以下错误消息。 请帮忙。

注意：我没有@ComponentScan，而是在我的应用程序的根包中使用@SpringBootApplication。另外，我正在使用最新版本的 apache camel springboot 依赖项。

另外，如果我删除以下依赖项，应用程序部署正常，但当然，没有初始化 Apache Camel 路由器！

<dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-spring-boot-starter</artifactId>
            <version>2.20.2</version>
</dependency>

我是如何更新的：更改 pom.xml 中的 springboot 版本 使用的工具：STS（Spring Tool Suite）

14-03-2018 11:51:27.972-main-ERROR-SpringApplication - Application run failed
org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [com.test.MyTestApp]; nested exception is java.lang.IllegalStateException: Could not evaluate condition on org.apache.camel.spring.boot.health.HealthCheckRoutesAutoConfiguration due to org/springframework/boot/bind/RelaxedPropertyResolver not found. Make sure your own configuration does not rely on that class. This can also happen if you are @ComponentScanning a springframework package (e.g. if you put a @ComponentScan in the default package by mistake)
    at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:616)
    at org.springframework.context.annotation.ConfigurationClassParser.processDeferredImportSelectors(ConfigurationClassParser.java:548)
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:184)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:316)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:233)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:273)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:93)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:693)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:531)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:388)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1234)
    at com.test.MyTestApp.main(MyTestApp.java:27)
Caused by: java.lang.IllegalStateException: Could not evaluate condition on org.apache.camel.spring.boot.health.HealthCheckRoutesAutoConfiguration due to org/springframework/boot/bind/RelaxedPropertyResolver not found. Make sure your own configuration does not rely on that class. This can also happen if you are @ComponentScanning a springframework package (e.g. if you put a @ComponentScan in the default package by mistake)
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:55)
    at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:109)
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:217)
    at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:606)
    ... 15 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/bind/RelaxedPropertyResolver
    at org.apache.camel.spring.boot.util.HierarchicalPropertiesEvaluator.isEnabled(HierarchicalPropertiesEvaluator.java:49)
    at org.apache.camel.spring.boot.util.HierarchicalPropertiesEvaluator.evaluate(HierarchicalPropertiesEvaluator.java:42)
    at org.apache.camel.spring.boot.util.GroupCondition.getMatchOutcome(GroupCondition.java:40)
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47)
    ... 18 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.bind.RelaxedPropertyResolver
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 22 common frames omitted

以下pom.xml的内容：

<?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.test</groupId>
    <artifactId>my-application</artifactId>
    <version>1.0</version>
    <packaging>war</packaging>

    <name>my-application</name>
    <description>TEST Application</description>

    <!-- Spring 1.5 to 2.0 Migration -->
    <!-- <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> 
        <version>1.5.6.RELEASE</version> <relativePath /> lookup parent from repository 
        </parent> -->

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.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-properties-migrator</artifactId>
            <scope>runtime</scope>
        </dependency> 

        <dependency>
            <groupId>com.vaadin.external.google</groupId>
            <artifactId>android-json</artifactId>
            <version>0.0.20131108.vaadin1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-activemq</artifactId>
        </dependency>
        <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-actuator</artifactId>
      <optional>true</optional>
      </dependency>
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-spring-boot-starter</artifactId>
            <version>2.20.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-jaxb</artifactId>
            <version>2.20.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-test-spring</artifactId>
            <version>2.20.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.activemq</groupId>
            <artifactId>activemq-camel</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.tomcat</groupId>
                    <artifactId>tomcat-jdbc</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.tomcat.embed</groupId>
                    <artifactId>tomcat-embed-websocket</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>commons-pool</groupId>
            <artifactId>commons-pool</artifactId>
        </dependency>

        <!-- Spring 1.5 to 2.0 Migration -->
        <!-- <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> 
            </dependency> -->

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-dbcp2</artifactId>
        </dependency>

        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>mssql-jdbc</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.activation/activation -->
        <dependency>
            <groupId>javax.activation</groupId>
            <artifactId>activation</artifactId>
            <version>1.1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.mail/mail -->
        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.4</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>build-helper-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <id>add-java-sources</id>
                        <goals>
                            <goal>add-source</goal>
                        </goals>
                        <configuration>
                            <sources>
                                <source>./src/main/generated-sources</source>
                            </sources>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>


        <finalName>test-app</finalName>
    </build>


</project>

Answer 1

解决了这个问题。Apache Camel 2.20.2 仅支持 Spring Boot 1.5。根据 Apache Camel 网站，他们将从 2.22（2018 年初夏）开始将支持扩展到 Spring Boot。所以要解决，现在只需要使用spring boot 1.5.10。感谢大家检查/回复。 参考链接：http://camel.apache.org/camel-2210-release.html

"This release supports only Spring Boot 1.5.x. Support for Spring Boot 2.0.x is coming in Camel version 2.22 which is planned for early summer 2018."

附：在http://start.spring.io/ （切换到完整版），您可以检查 Spring 项目（Apache Camel）是否与您的 Spring Boot 版本兼容。目前 Initilizer 显示

Apache Camel
Integration using Apache Camel
requires Spring Boot >=1.4.0.RELEASE and <2.0.0.M1