java命令行运行 classnotfound_[原]命令行运行class文件出现NoClassDefFoundError

[标题]:[原]命令行运行class文件出现NoClassDefFoundError

[时间]:2012-02-14

[摘要]:Java命令运行程序时出现java.lang.NoClassDefFoundError: org/apache/http/HttpEntity。

[关键字]: Java、package、Jar、运行、error、class-path、库、HttpClient

[文章编号]:暂无

[环境]: JDK 7.0

[作者]: Wintys  ([email protected])

[错误]:

运行命令行：

java  NetLogin -cp .;commons-codec-1.4.jar;commons-logging-1.1.1.jar;httpclient-4.1.3.jar;httpclient-cache-4.1.3.jar;httpcore-4.1.4.jar;httpmime-4.1.3.jar

出现如下错误：

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/http/HttpEntity

at java.lang.Class.getDeclaredMethods0(Native Method)

at java.lang.Class.privateGetDeclaredMethods(Unknown Source)

at java.lang.Class.getMethod0(Unknown Source)

at java.lang.Class.getMethod(Unknown Source)

at sun.launcher.LauncherHelper.getMainMethod(Unknown Source)

at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

Caused by: java.lang.ClassNotFoundException: org.apache.http.HttpEntity

at java.net.URLClassLoader$1.run(Unknown Source)

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)

... 6 more

[原因&解决]:

被运行的程序编译正常通过，运行却出现了NoClassDefFoundError，不知道是哪里出错了。找了半天，发现编译程序的命令行有问题，-cp参数应放到类名前面来：

java  -cp .;commons-codec-1.4.jar;commons-logging-1.1.1.jar;httpclient-4.1.3.jar;httpclient-cache-4.1.3.jar;httpcore-4.1.4.jar;httpmime-4.1.3.jarNetLogin