unix在子目录中运行Java程序

Question

如果我的格式错误，请给出建议，这是我第一次在这里发帖。使用UNIX时，我无法从顶级目录运行Java程序“Master”（位于子目录中）。编译从顶层就可以很好地工作，但我实际上无法从顶层运行java代码。我想我可能误解了classpath/classpath标志。我的目录结构如下：/top-level/src/amsPassageretriever

当我尝试从顶级目录运行所有内容时，出现以下错误：

user:~/top-level$ javac -classpath :/NLP_TOOLS/info_retrieval/lucene/latest/lucene-core-3.1.0.jar:/NLP_TOOLS/info_retrieval/lucene/latest/contrib/demo/lucene-demo-3.1.0.jar:/NLP_TOOLS/info_retrieval/lucene/latest/contrib/wordnet/lucene-wordnet-3.1.0.jar:/NLP_TOOLS/info_retrieval/lemur/latest/share/indri/indri.jar src/amsPassageretriever/*.java
user:~/top-level$ java -classpath :/NLP_TOOLS/info_retrieval/lucene/latest/lucene-core-3.1.0.jar:/NLP_TOOLS/info_retrieval/lucene/latest/contrib/demo/lucene-demo-3.1.0.jar:/NLP_TOOLS/info_retrieval/lucene/latest/contrib/wordnet/lucene-wordnet-3.1.0.jar:/NLP_TOOLS/info_retrieval/lemur/latest/share/indri/indri.jar src/amsPassageretriever/Master
Exception in thread "main" java.lang.NoClassDefFoundError: src/amsPassageretriever/Master (wrong name: amsPassageretriever/Master)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
Could not find the main class: src/amsPassageretriever/Master.  Program will exit.

Answer 1

您正在键入“retrieve”和“retriever”，这是两个不同的单词

Answer 2

java的参数不是文件，而是类路径（您要执行的主类）内类的完全限定类名

听起来好像你想要的类是amsPassageretriever.Master（我假设你在文章末尾打错了一个名为amsPassageretrieve的程序包）

因此，您应该调用：

java -classpath :/NLP_TOOLS/info_retrieval/lucene/latest/lucene-core-3.1.0.jar:/NLP_TOOLS/info_retrieval/lucene/latest/contrib/demo/lucene-demo-3.1.0.jar:/NLP_TOOLS/info_retrieval/lucene/latest/contrib/wordnet/lucene-wordnet-3.1.0.jar:/NLP_TOOLS/info_retrieval/lemur/latest/share/indri/indri.jar amsPassageretriever.Master

更新： 如果希望它在不在src时正常运行，则还需要将该目录添加到类路径中：

java -classpath /home/user/top-level/src:/NLP_TOOLS/info_retrieval/lucene/latest/lucene-core-3.1.0.jar:/NLP_TOOLS/info_retrieval/lucene/latest/contrib/demo/lucene-demo-3.1.0.jar:/NLP_TOOLS/info_retrieval/lucene/latest/contrib/wordnet/lucene-wordnet-3.1.0.jar:/NLP_TOOLS/info_retrieval/lemur/latest/share/indri/indri.jar amsPassageretriever.Master

Answer 3

试试java amsPassageretrieve.Master因为据我所知，amsPassageretrieve就是这个包

如果类需要，可能还需要添加类路径变量