Question

我的项目是在linux环境中。我想在我的项目中添加memcached jar依赖jar。所以我在pom.xml中添加了以下行here。

  <repositories>
    <repository>
      <id>spy</id>
      <name>Spy Repository</name>
      <layout>default</layout>
      <url>http://files.couchbase.com/maven2/</url>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
    </repository>
  </repositories>
 <dependencies>
   <dependency>
        <groupId>spy</groupId>
        <artifactId>spymemcached</artifactId>
        <version>2.8.1</version>
        <scope>compile</scope>
    </dependency>
 </dependencies>

程序已成功构建。但是每当我运行项目jar时，它都会引发异常：

Exception in thread "main" java.lang.NoClassDefFoundError: net/spy/memcached/MemcachedClient
        at MemClient.<clinit>(MemClient.java:12)
        at MemClientUser.main(MemClientUser.java:18)
Caused by: java.lang.ClassNotFoundException: net.spy.memcached.MemcachedClient
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
        ... 2 more

我尝试了以下链接中给出的解决方案： Java ClassNotFoundException with maven dependency，但没有解决异常问题如何解决这个异常？

Answer 1

运行jar是不够的，因为Maven没有将模块的依赖关系“合并”到它正在构建的jar中。用

运行jar

java -jar yourJar.jar -cp pathToTheSpymemcached.jar

您可以适当地替换yourJar.jar和pathToTheSpymemcached.jar，或者您可以查看：How can I create an executable JAR with dependencies using Maven?

Memcached依赖jar不使用maven项目并抛出java.lang.ClassNotFound：net.spy.memcached.MemcachedClient Exception

1 个答案: