如何解决jdom库运行时异常？
我想使用 jdom-1.1.jar 库文件从 java 代码创建一个 kml 文件。它没有给我的程序提供编译时错误，但显示运行时错误：
C:\ProgramFiles\Tomcat\tomcat-5.5.9\webapps\jsp-examples>java KmlSample
Exception in thread "main" java.lang.NoClassDefFoundError: org/jdom/Content
Caused by: java.lang.ClassNotFoundException: org.jdom.Content
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: KmlSample. Program will exit.
我该如何解决此类错误..
I want to make a kml file from a java code using jdom-1.1.jar library file. It gives no compile time error to my program but showing a run time error:
C:\ProgramFiles\Tomcat\tomcat-5.5.9\webapps\jsp-examples>java KmlSample
Exception in thread "main" java.lang.NoClassDefFoundError: org/jdom/Content
Caused by: java.lang.ClassNotFoundException: org.jdom.Content
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: KmlSample. Program will exit.
how can i resolve such error..
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您绝对必须告诉 Java 在哪里可以找到 jdom 库（以及您可能需要的其他库）。假设您的库位于某个文件夹
/dev/lib中，那么正确的命令如下所示：此命令进一步假设文件
KmlSample.class位于当前位置和类KmlSample在默认命名空间中定义的位置（KmlSample.java没有package语句）并且KmlClass有一个正确的main方法（入口点）。编辑
这应该可以工作（或者至少应该产生不同的错误消息）
确保当前目录（在上面的示例中执行java的位置）包含该文件
KmlSample.class（看看我答案的上半部分）。您提到了该位置的KmlSample.java文件 - 您编译了源代码吗？You definitily have to tell Java where to find the jdom library (and other libraries you may need). Assuming you have the library in some folder
/dev/lib, then the correct command would be like this:This command further assumes that the file
KmlSample.classis at the current location and that the classKmlSampleis defined in the default namespace (KmlSample.javadoes not have apackagestatement) and theKmlClasshas a correctmainmethod (entry point).Edit
This should work (or at least it should produce a different error message)
Make sure, the current directory (from where you execute java in the above example) contains the file
KmlSample.class(have a look at the upper section of my answer). You mentioned aKmlSample.javafile at that location - have you compiled the source?您需要在类路径上添加 jdom-1.1.jar，以便显示您如何运行程序，应该像
you need to add jdom-1.1.jar on your classpath, so show how you are running your program, should be like