相关疑难解决方法(0)

尝试运行使用jackon的ObjectMapper类的java程序时出现以下错误:

Exception in thread "main" java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/ObjectMapper
  at com.inin.dynamotransfer.DynamoTransfer.importData(DynamoTransfer.java:133)
  at com.inin.dynamotransfer.DynamoTransfer.main(DynamoTransfer.java:67)
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.ObjectMapper
  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:425)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
  ... 2 more

我有杰克逊的注解,数据绑定(包含ObjectMapper),以及核心的JAR文件中在〜/ .m2目录/库我的Maven仓库/ COM/fasterxml /杰克逊/核心/ jackson- [包名] /2.4.0.这是我的pom.xml的依赖项部分:

<dependencies>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.4.0</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.4.0</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>2.4.0</version>
    </dependency>
</dependencies>

这是我的CLASSPATH:

:/Users/myusername/Library/Java/Extensions:/Library/Java/Extensions:/Users/myusername/.m2/repository

所以Maven知道所有这些JAR - 在哪里获取em,在哪里放em等等 - 但java本身似乎无法找到我需要的类.我究竟做错了什么？？谢谢!