[英]A single jar throws ClassNotFoundException AFTER I have compiled
我的project / lib文件夹中有9个jar文件,并且我的类路径似乎正确。 在编译之前,一切正常,但在编译单个jar时,stringtree-json-2.0.5.jar在我尝试运行它时抛出ClassNotFoundException。
我尝试过的事情:
这是抛出的错误:
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。 解决此问题的一再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? 我觉得我已经筋疲力尽了(...我自己和)在google和stackoverflow上找到的所有选项。
谢谢!
只是考虑罐子的传递依赖关系。 您是否认为其中一个罐子中包含以下类JSONReader。 通常使用Jackson或任何此类框架,我遇到了jar的传递依赖项,jackson jar依赖于其他jar。 通常,在编译时不需要这些可传递依赖项,但是在运行时则需要,因此我们最终会遇到NoClassDefFound错误。
如果是这种情况,我建议使用maven避免所有此类依赖项的麻烦。
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