ClassNotFoundException的運行Clojure的罐子

Question

我想運行一個Clojure的JAR文件時，我得到的錯誤如下：

C:\Users\Nahashon>java -jar C:\Users\Nahashon\.m2\repository\org\enclojure\sample\0.0.1\sample-0.0.1.jar 
Exception in thread "main" java.lang.NoClassDefFoundError: com/mode/mdzw 

Caused by: java.lang.ClassNotFoundException: com.mode.mdzw 
    at java.net.URLClassLoader$1.run(Unknown Source) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.net.URLClassLoader.findClass(Unknown Source) 
    at java.lang.ClassLoader.loadClass(Unknown Source) 
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) 
    at java.lang.ClassLoader.loadClass(Unknown Source) 
Could not find the main class: com.mode.mdzw. Program will exit. 

Clojure的項目使用的NetBeans 6.9.1行家創建。和Clojure的代碼如下：

(ns com.mode.mdzw 
(:gen-class)) 

(defn -main [] 
(println "Looks like it works!")) 

的POM文件如下：

<?xml version="1.0" encoding="UTF-8"?> 
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 
<properties> 
    <clojure.version>1.1.0</clojure.version> 
</properties> 
<modelVersion>4.0.0</modelVersion> 
<groupId>org.enclojure</groupId> 
<artifactId>sample</artifactId> 
<version>0.0.1</version> 
<name>mdzw</name> 
<description>mdzw</description> 
<build> 
<sourceDirectory>src/main/clojure</sourceDirectory> 
<testSourceDirectory>src/test/clojure</testSourceDirectory> 
    <resources> 
     <resource> 
      <directory>src/main/clojure</directory> 
     </resource> 
     <resource> 
      <directory>src/main/resources</directory> 
     </resource> 
    </resources> 
    <testResources> 
     <testResource> 
      <directory>src/test/clojure</directory> 
     </testResource> 
    </testResources> 
<plugins> 
    <plugin> 
    <groupId>com.theoryinpractise</groupId> 
    <artifactId>clojure-maven-plugin</artifactId> 
    <version>1.3.2</version> 
    <configuration> 
     <sourceDirectories> 
      <sourceDirectory>src/main/clojure</sourceDirectory> 
     </sourceDirectories> 
     <clojureOptions>-Xmx1G</clojureOptions> 
    </configuration> 
    <executions> 
     <execution> 
     <id>compile-clojure</id> 
     <phase>compile</phase> 
     <goals> 
      <goal>compile</goal> 
     </goals> 
     </execution> 
    </executions> 
    </plugin> 
    <plugin> 
    <groupId>org.apache.maven.plugins</groupId> 
    <artifactId>maven-compiler-plugin</artifactId> 
    <configuration> 
     <source>1.5</source> 
     <target>1.5</target> 
    </configuration> 
    </plugin> 

    <!-- --> 
    <plugin> 
     <groupId>org.apache.maven.plugins</groupId> 
     <artifactId>maven-jar-plugin</artifactId> 
     <configuration> 
      <archive> 
       <manifest> 
        <addClasspath>true</addClasspath> 
        <mainClass>classes.com.mode.mdzw</mainClass> 
        <classpathPrefix>dependency</classpathPrefix> 
       </manifest> 
      </archive> 
     </configuration> 
    </plugin> 
    <plugin> 
     <groupId>org.apache.maven.plugins</groupId> 
     <artifactId>maven-dependency-plugin</artifactId> 
     <executions> 
      <execution> 
       <id>copy-dependencies</id> 
       <phase>package</phase> 
       <goals> 
        <goal>copy-dependencies</goal> 
       </goals> 
      </execution> 
     </executions> 
    </plugin> 

</plugins> 
</build> 
<repositories> 
    <repository> 
    <id>central</id> 
    <url>http://repo1.maven.org/maven2</url> 
    </repository> 
<repository> 
    <id>clojure-releases</id> 
    <url>http://build.clojure.org/releases</url> 
</repository> 
<repository> 
    <id>incanter</id> 
    <url>http://repo.incanter.org</url> 
</repository> 
<repository> 
    <id>clojure-snapshots</id> 
    <url>http://build.clojure.org/snapshots</url> 
</repository> 
<repository> 
    <id>clojars</id> 
    <url>http://clojars.org/repo/</url> 
</repository> 
</repositories> 
<dependencies> 
    <dependency> 
    <groupId>org.clojure</groupId> 
    <artifactId>clojure</artifactId> 
    <version>${clojure.version}</version> 
    </dependency> 
    <dependency> 
    <groupId>org.clojure</groupId> 
    <artifactId>clojure-contrib</artifactId> 
    <version>${clojure.version}</version> 
    </dependency> 
    <dependency> 
    <groupId>swank-clojure</groupId> 
    <artifactId>swank-clojure</artifactId> 
    <version>1.1.0-SNAPSHOT</version> 
    <exclusions> 
     <exclusion> 
     <groupId>org.clojure</groupId> 
     <artifactId>clojure</artifactId> 
     </exclusion> 
     <exclusion> 
     <groupId>org.clojure</groupId> 
     <artifactId>clojure-contrib</artifactId> 
     </exclusion> 
    </exclusions> 
    </dependency> 
    </dependencies> 
</project> 

什麼我不這樣做對嗎？

Answer 1

如果你剛開始使用leiningen，那麼你可以嘗試Ankur's advice above或在project.clj中設置:main。

(defproject org.enclojure/sample "0.1.0-SNAPSHOT" 
    :dependencies [[org.clojure/clojure "1.4.0"]] 
    :main com.mode.mdzw) 

然後只需運行lein run即可啓動程序。如果你想要一個jar，你可以執行w/o lein，使用lein uberjar來構建它。

有關更多信息，請參閱leiningen tutorial。

如果你想堅持使用maven（我沒有用太多），你應該看看clojure-maven-plugin的文檔，它已經在你的pom中，但可能沒有正確設置。它提供了一個clojure:compile目標，可能會滿足您的需求。

我想一個顯而易見的問題是，在運行java -jar C:\Users\Nahashon\.m2\repository\org\enclojure\sample\0.0.1\sample-0.0.1.jar之前要運行什麼目標？