Java 编译后，单个jar会抛出ClassNotFoundException

我的project/lib文件夹中有9个jar文件，我的类路径看起来很准确。在编译之前，一切都正常，但在编译单个jar之后，stringtree-json-2.0.5.jar在我尝试运行它时抛出ClassNotFoundException

我尝试过的事情：

• 不再使用Jackson（假设它是特定于jar的），但是Stringtree有完全相同的问题。有问题的jar只是一个json解析器，我只使用了一次（在一个关键领域）
• 尝试在编译前后更改类路径以确保其正确
• 可能还有很多我不记得了。。。我被困在这上面一周左右了

下面是抛出时的错误：

org.bukkit.command.CommandException: Unhandled exception executing command 'rate' in plugin Pariah v1
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:189)
    at org.bukkit.craftbukkit.v1_5_R2.CraftServer.dispatchCommand(CraftServer.java:523)
    at net.minecraft.server.v1_5_R2.PlayerConnection.handleCommand(PlayerConnection.java:966)
    at net.minecraft.server.v1_5_R2.PlayerConnection.chat(PlayerConnection.java:884)
    at net.minecraft.server.v1_5_R2.PlayerConnection.a(PlayerConnection.java:841)
    at net.minecraft.server.v1_5_R2.Packet3Chat.handle(Packet3Chat.java:44)
    at net.minecraft.server.v1_5_R2.NetworkManager.b(NetworkManager.java:292)
    at net.minecraft.server.v1_5_R2.PlayerConnection.d(PlayerConnection.java:110)
    at net.minecraft.server.v1_5_R2.ServerConnection.b(SourceFile:35)
    at net.minecraft.server.v1_5_R2.DedicatedServerConnection.b(SourceFile:30)
    at net.minecraft.server.v1_5_R2.MinecraftServer.r(MinecraftServer.java:580)
    at net.minecraft.server.v1_5_R2.DedicatedServer.r(DedicatedServer.java:225)
    at net.minecraft.server.v1_5_R2.MinecraftServer.q(MinecraftServer.java:476)
    at net.minecraft.server.v1_5_R2.MinecraftServer.run(MinecraftServer.java:409)
    at net.minecraft.server.v1_5_R2.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.NoClassDefFoundError: org/stringtree/json/JSONReader
    at pariah.AllMethods.ratingCall(AllMethods.java:351)
    at pariah.AllMethods.getPathRankRating(AllMethods.java:308)
    at pariah.Pariah.onCommand(Pariah.java:63)
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
    ... 15 more
Caused by: java.lang.ClassNotFoundException: org.stringtree.json.JSONReader
    at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
    at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:80)
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
    ... 19 more

这是我当前的类路径：

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry including="**/*.java" kind="src" output="target/classes" path="src">
        <attributes>
            <attribute name="optional" value="true"/>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="src" output="target/test-classes" path="test">
        <attributes>
            <attribute name="optional" value="true"/>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>
    </classpathentry>
    <classpathentry exported="true" kind="lib" path="lib/commons-codec-1.6.jar"/>
    <classpathentry exported="true" kind="lib" path="lib/commons-logging-1.1.1.jar"/>
    <classpathentry exported="true" kind="lib" path="lib/httpclient-4.2.2.jar"/>
    <classpathentry exported="true" kind="lib" path="lib/httpclient-cache-4.2.2.jar"/>
    <classpathentry exported="true" kind="lib" path="lib/httpcore-4.2.2.jar"/>
    <classpathentry exported="true" kind="lib" path="lib/httpmime-4.2.2.jar"/>
    <classpathentry exported="true" kind="lib" path="lib/stringtree-json-2.0.5.jar"/>
    <classpathentry exported="true" kind="lib" path="lib/bukkit-1.5.1-R0.1-20130325.184829-14.jar"/>
    <classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/4"/>
    <classpathentry exported="true" kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6">
        <attributes>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>
    </classpathentry>
    <classpathentry exported="true" kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
        <attributes>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="output" path="target/classes"/>
</classpath>

我正在使用eclipse进行开发和编译。解决这个问题的一个经常重复的建议是将项目导出为可运行的Jar文件。但是，这是一个插件，因此没有“main”方法

还有其他想法吗？我觉得我已经用尽了我在谷歌和stackoverflow上找到的所有选项

---

谢谢

只考虑jar的可传递依赖项。您认为其中一个jar中有以下类JSONReader吗。通常使用Jackson或任何这样的框架，我遇到了jar的可传递依赖性，Jackson jar依赖于其他jar。通常在编译时不需要这些可传递的依赖项，但在运行时它们是必需的，我们最终会遇到NoClassDefFound错误

如果是这样的话，我建议使用maven来避免所有这些依赖性的麻烦