Spring Boot在外部Tomcat部署上抛出NoSuchMethodError org.springframework.util.StringUtils.isEmpty

Question

我用spring-boot将spring rest服务作为外部tomcat上的war文件进行部署。

引起原因：java.lang.NoSuchMethodError：org.springframework.util.StringUtils.isEmpty（Ljava / lang / Object;）Z

Spring版本是由Maven中的spring-boot-starter-parent管理的 ，但始终会出现异常，这是不兼容的Spring版本的典型代表。 我测试：

• spring-boot-starter-parent v * 1.2.7.RELEASE *和v * 1.3.0.BUILD-SNAPSHOT *

• tomcat v8.0.3和8.0.28

奇怪的是，我也将其部署为可运行的jar文件，并且没有错误。 我还反编译了war文件并在\\ WEB-INF \\ lib \\ spring-core-4.1.8.RELEASE中找到了org.springframework.util.StringUtils.isEmpty 。

我还检查了maven debug输出，并仅找到一个具有正确版本（4.1.8.RELEASE）的spring-core工件。

tomcat是否有可能在内部使用spring-core并且存在冲突？

部署中Tomcat日志文件中的异常：

Caused by: java.lang.NoSuchMethodError: org.springframework.util.StringUtils.isEmpty(Ljava/lang/Object;)Z
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.getLogger(LogbackLoggingSystem.java:159)
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.beforeInitialize(LogbackLoggingSystem.java:91)
    at org.springframework.boot.logging.LoggingApplicationListener.onApplicationStartedEvent(LoggingApplicationListener.java:155)
    at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:141)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:151)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:128)
    at org.springframework.boot.context.event.EventPublishingRunListener.publishEvent(EventPublishingRunListener.java:100)
    at org.springframework.boot.context.event.EventPublishingRunListener.started(EventPublishingRunListener.java:54)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:278)
    at org.springframework.boot.context.web.SpringBootServletInitializer.run(SpringBootServletInitializer.java:134)
    at org.springframework.boot.context.web.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:125)
    at org.springframework.boot.context.web.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:81)
    at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:175)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5170)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 45 more

我的pom.xml：

...
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.2.7.RELEASE</version>
</parent>
<properties>
    <java.version>1.8</java.version>
</properties>
<dependencies>
        <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jms</artifactId>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>de.cherrypit</groupId>
        <artifactId>lisa</artifactId>
        <version>0.1.1-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>5.0.2.Final</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.activemq</groupId>
        <artifactId>activemq-broker</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>
<repositories>
    <repository>
        <id>spring-releases</id>
        <url>https://repo.spring.io/libs-release</url>
    </repository>
</repositories>
<pluginRepositories>
    <pluginRepository>
        <id>spring-releases</id>
        <url>https://repo.spring.io/libs-release</url>
    </pluginRepository>
</pluginRepositories>
<packaging>war</packaging>
...

Answer 1

我发现了我的错误。 我还要在项目共享库lisa中添加spring-android-core。

不要在classpath中使用spring-android-core和spring-core 。