Question

我有以下文件夹结构...

MyApp
      |com
      |lib
          |--- log4j-1.2.17.jar,mysqlconn.jar,jcalendar-1.4.jar,poi-3.9.jar
      |prop
          |---log4j.properties
      |manifest.txt

manifest.txt：

 Main-Class: com.java.test.WelcomeScreen
 Class-Path: prop lib/jcalendar-1.4.jar lib/log4j-1.2.17.jar lib/mysql-connector-java-5.0.8-bin.jar lib/poi-3.9.jar

我正在创建可执行jar，如下所示：

 C:\Users\Administrator\Desktop\MyApp>jar -cvfm myapp.jar manifest.txt com/java/test/*.class com/java/db/*.class

然后跑步：

C:\Users\Administrator\Desktop\MyApp>java -jar myapp.jar

我收到以下错误：

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/log4j/Logger
        at com.java.test.LoginForm.<clinit>(LoginForm.java:17)
        at com.java.test.WelcomeScreen.main(WelcomeScreen.java:134)
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger
        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)
        ... 2 more

Answer 1

您需要在清单末尾添加一个空行。在log4j.properties存在的情况下，只包括目录就可以了。我打算建议将log4.properties放在与主jar文件相同的路径中并添加＆＃34;。＆＃34;到类路径。但是看起来像在目录末尾添加/就像OP找到的那样工作。

如何将log4j.properties和log4j.jar添加到可执行jar ..？

1 个答案: