Question

在我的Spring Starter创建的Soring Boot应用程序中，我从Spring Boot 1.3.0M1切换到1.3.0M2。尝试启动应用程序时（从STS 3.7.0或通过spring-boot：在命令行运行），我得到以下异常：

java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:435)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: Cannot instantiate interface org.springframework.context.ApplicationListener : org.springframework.boot.logging.ClasspathLoggingApplicationListener
        at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:385)
        at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:362)
        at org.springframework.boot.SpringApplication.initialize(SpringApplication.java:231)
        at org.springframework.boot.SpringApplication.<init>(SpringApplication.java:206)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:971)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:960)
        at com.daimler.daivb.services.application.dummyservice.DummyServiceApplication.main(DummyServiceApplication.java:18)
        ... 6 more
Caused by: java.lang.NoClassDefFoundError: org/springframework/context/event/GenericApplicationListener
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at org.springframework.util.ClassUtils.forName(ClassUtils.java:250)
        at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:378)
        ... 12 more
Caused by: java.lang.ClassNotFoundException: org.springframework.context.event.GenericApplicationListener
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        ... 25 more

在春季上下文版本4.2.0中添加了上面提到的类，但是在查看依赖树时，我可以看到Spring Boot 1.3.0M2仍然依赖于spring-context 4.1.6：

[INFO] com.company.services.application:dummyservice:war:0.0.1-SNAPSHOT
[INFO] +- org.springframework.boot:spring-boot-devtools:jar:1.3.0.M2:compile
[INFO] |  +- org.springframework.boot:spring-boot:jar:1.3.0.M2:compile
[INFO] |  |  \- org.springframework:spring-context:jar:4.1.6.RELEASE:compile
[INFO] |  \- org.springframework.boot:spring-boot-autoconfigure:jar:1.3.0.M2:compile
[INFO] |     \- org.yaml:snakeyaml:jar:1.15:compile

Answer 1

我遇到了同样的问题，因为我的POM有一个属性部分，其中包含从另一个项目复制的<spring.version>标记。

删除属性部分中可能与Spring Boot库冲突的所有<abc.version>标记。

Answer 2

Caused by: java.lang.NoClassDefFoundError: org/springframework/context/event/GenericApplicationListener

从上面的错误中，应用程序无法找到从jar依赖项定义的类。从春季版4.2开始添加GenericApplicationListener。

将您的Spring版本升级到4.2并重新检查。

从Spring Boot 1.3.0M1切换到1.3.0M2时出现“NoClassDefFoundError：GenericApplicationListener”

2 个答案: