没有找到春天的宁静服务。与Spring Boot集成时的NoClassDefFound

时间：2014-09-29 15:00:13

标签： java spring maven spring-mvc tomcat

我正在Spring中进行一些测试，并在尝试构建简单的REST api时遇到问题。环境非常简单，但是我希望能够在Tomcat和Spring Boot中执行这两种部署方法。

在我的主项目中，我创建了这个类：

package springTest.tomcat;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class SpringTest {

    @RequestMapping(value="/greeting",method=RequestMethod.GET)
    public String greeting(@RequestParam(value="name",required=true) String name){
        return "Hello "+name;
    }
}

我创建了一个application-context.xml，其中包含以下内容：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
                           http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="controller" class="springTest.tomcat.SpringTest" />
</beans>

我的应用程序有DynamicWebProject方面，所以我将springTest.war导出到tomcat 8并启动它，在端口9090上运行。

然后我导航到localhost：9090 / springTest / greeting？name = Aaron但是我收到404错误。

然后我尝试创建另一个项目，它将以前的项目封装为Spring启动应用程序

这个新项目的唯一内容如下

package springTest.Boot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@EnableAutoConfiguration
@ComponentScan
public class SpringTest {
    public static void main(String[] args){
        SpringApplication.run(SpringTest.class, args);
    }

    @Bean
    public springTest.tomcat.SpringTest springTest(){
        return new springTest.tomcat.SpringTest();
    }
}

当我尝试执行此操作时，我得到以下堆栈跟踪：

Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/core/OrderComparator$OrderSourceProvider
    at org.springframework.context.support.GenericApplicationContext.<init>(GenericApplicationContext.java:101)
    at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:60)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at org.springframework.beans.BeanUtils.instantiate(BeanUtils.java:78)
    at org.springframework.boot.SpringApplication.createApplicationContext(SpringApplication.java:528)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:292)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:952)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:941)
    at springTest.Boot.SpringTest.main(SpringTest.java:14)
Caused by: java.lang.ClassNotFoundException: org.springframework.core.OrderComparator$OrderSourceProvider
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 13 more

这是我的核心应用程序的pom.xml 

<properties>
    <spring.core.version>4.0.6.RELEASE</spring.core.version>
    <spring.web.version>4.1.0.RELEASE</spring.web.version>
</properties>
<build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <source />
                <target />
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.core.version}</version>
    </dependency>
        <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${spring.web.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring.web.version}</version>
    </dependency>
</dependencies>

我的春季启动应用程序的pom.xml 

<properties>
    <spring.boot.version>1.1.4.RELEASE</spring.boot.version>
</properties>
<build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>1.1.7.RELEASE</version>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <source />
                <target />
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-amqp</artifactId>
        <version>${spring.boot.version}</version>
    </dependency>
    <dependency>
        <groupId>SpringTest_Tomcat</groupId>
        <artifactId>SpringTest_Tomcat</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </dependency>
</dependencies>

TL;博士

基本上： 如果我创建一个spring应用程序并在tomcat中运行，我会继续为我的REST调用获取404。

如果我将它封装在SpringBoot应用程序中，我会获得依赖项中的spring类的NoClassDefFoundError ...

包含代码的回购： https://github.com/mangusbrother/SpringTests

2 个答案:

答案 0 :(得分：0)

第一个应用程序没有弹簧配置，您可以通过将您的代码与spring.io上的示例进行比较来清楚地看到 对于第二个，我想这是因为spring-boot有一个不同版本的spring-core 在进行此类实验之前，您应该从the official guide开始

答案 1 :(得分：0)

出现此问题是因为您的maven项目的某些依赖项依赖于“spring-core”。早期版本4.1。为了发现它，我运行了以下maven命令：

c:\myapp>mvn dependency:tree

maven树（在这篇文章的最后）向我展示了依赖关系＆org.springframework.shell：spring-shell：jar：1.1.0.RELEASE＆＃39;依赖于＆＃39; org.springframework：spring-core：jar：4.0.3.RELEASE＆＃39;这导致了这个问题（版本4.0.3早于4.1）。在我的情况下，解决方案是排除这种“依赖性”。在我的pom.xml中如下：

...
       <dependency>
            <groupId>org.springframework.shell</groupId>
            <artifactId>spring-shell</artifactId>
            <version>1.1.0.RELEASE</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-core</artifactId>
                </exclusion>
                <exclusion>
                    <artifactId>org.springframework</artifactId>
                    <groupId>spring-context-support</groupId>
                </exclusion>
            </exclusions>
        </dependency>
....

这是我的maven依赖树输出：

[INFO] ------------------------------------------------------------------------
[INFO] Building console 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ console ---
[INFO] br.com.mycompany.myapp:console:jar:1.0-SNAPSHOT
[INFO] +- br.com.mycompany.myapp:core:jar:1.0-SNAPSHOT:compile
[INFO] |  +- org.springframework:spring-tx:jar:4.1.6.RELEASE:compile
[INFO] |  +- org.hibernate:hibernate-validator:jar:4.3.1.Final:compile
[INFO] |  |  \- org.jboss.logging:jboss-logging:jar:3.1.0.CR2:compile
[INFO] |  +- org.hibernate.javax.persistence:hibernate-jpa-2.1-api:jar:1.0.0.Final:compile
[INFO] |  +- javax.validation:validation-api:jar:1.0.0.GA:compile
[INFO] |  \- org.hibernate:hibernate-jpamodelgen:jar:4.3.3.Final:compile
[INFO] |     \- org.jboss.logging:jboss-logging-annotations:jar:1.2.0.Beta1:compile
[INFO] +- br.com.mycompany.myapp:hibernateRepo:jar:1.0-SNAPSHOT:compile
[INFO] |  +- org.hibernate:hibernate-core:jar:4.3.3.Final:compile
[INFO] |  |  +- org.jboss.spec.javax.transaction:jboss-transaction-api_1.2_spec:jar:1.0.0.Final:compile
[INFO] |  |  +- dom4j:dom4j:jar:1.6.1:compile
[INFO] |  |  |  \- xml-apis:xml-apis:jar:1.0.b2:compile
[INFO] |  |  +- org.hibernate.common:hibernate-commons-annotations:jar:4.0.4.Final:compile
[INFO] |  |  +- org.javassist:javassist:jar:3.18.1-GA:compile
[INFO] |  |  +- antlr:antlr:jar:2.7.7:compile
[INFO] |  |  \- org.jboss:jandex:jar:1.1.0.Final:compile
[INFO] |  +- org.hibernate:hibernate-entitymanager:jar:4.3.3.Final:runtime
[INFO] |  \- org.springframework:spring-orm:jar:4.1.6.RELEASE:compile
[INFO] |     \- org.springframework:spring-jdbc:jar:4.1.6.RELEASE:compile
[INFO] +- br.com.mycompany.myapp:hsqldb-repo:jar:1.0-SNAPSHOT:compile
[INFO] |  +- org.hsqldb:hsqldb:jar:2.3.3:compile
[INFO] |  \- org.liquibase:liquibase-core:jar:2.0.5:compile
[INFO] +- org.springframework.shell:spring-shell:jar:1.1.0.RELEASE:compile
[INFO] |  +- commons-io:commons-io:jar:2.3:compile
[INFO] |  +- jline:jline:jar:2.11:compile
[INFO] |  +- com.google.guava:guava:jar:15.0:compile
[INFO] |  +- cglib:cglib:jar:2.2.2:compile
[INFO] |  |  \- asm:asm:jar:3.3.1:compile
[INFO] |  +- org.springframework:spring-context-support:jar:4.0.3.RELEASE:compile
[INFO] |  \- org.springframework:spring-core:jar:4.0.3.RELEASE:compile
[INFO] |     \- commons-logging:commons-logging:jar:1.1.3:compile
[INFO] +- org.fusesource.jansi:jansi:jar:1.11:runtime
[INFO] +- org.springframework:spring-context:jar:4.1.6.RELEASE:compile
[INFO] |  +- org.springframework:spring-aop:jar:4.1.6.RELEASE:compile
[INFO] |  |  \- aopalliance:aopalliance:jar:1.0:compile
[INFO] |  +- org.springframework:spring-beans:jar:4.1.6.RELEASE:compile
[INFO] |  \- org.springframework:spring-expression:jar:4.1.6.RELEASE:compile
[INFO] +- org.springframework:spring-test:jar:4.1.6.RELEASE:test
[INFO] +- junit:junit:jar:4.11:test
[INFO] |  \- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] \- joda-time:joda-time:jar:2.9:compile
[INFO]

端。

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