从命令行创建jar文件 [英] Create jar file from command line

问题描述

我有以下目录层次结构：

  SigarTest 
 src 
 SigarTest 
。 java文件
 bin 
 SigarTest 
 .class文件
  

SigarTest是一个包名。根文件夹在jdk的bin文件夹中。
从那里，我运行以下命令来创建我的项目的jar文件 -

  ./ jar cfe temp .jar SigarTest.SigarMain SigarTest / bin / tools.jar sigar.jar mongo-2.7.3.jar 
  

其中tools.jar，mongo-2.7.3.jar和sigar.jar是必需的，并且位于与根目录（jdk的bin文件夹）相同的文件夹中。但是，在运行它，我得到

  ClassNotFoundException：SigarTest.SigarMain 
  
解决方案
使用 
 a href =http://docs.oracle.com/javase/6/docs/technotes/tools/windows/jar.html =nofollow>   -C  
 选项 
 
 
暂时更改目录在执行 jar 命令期间，在处理以下 inputfiles 时执行 cd  em>参数。
 
 
如果在问题中执行 jar 列出temp.jar的内容，您将看到类似于以下内容的输出：
  $ rm -rf temp.jar 
 $ jar cfe temp.jar SigarTest.SigarMain SigarTest / bin / tools.jar sigar.jar mongo-2.7.3.jar 
 $ jar tf temp.jar 
 META-INF / 
 META-INF / MANIFEST.MF 
 SigarTest / bin / 
 SigarTest / bin / SigarTest / 
 SigarTest / bin / SigarTest / SigarMain.class 
 tool.jar 
 sigar .jar 
 mongo-2.7.3.jar 
 $ java -jar temp.jar 
线程main中的异常java.lang.NoClassDefFoundError：SigarTest / SigarMain 
引发： java.lang.ClassNotFoundException：SigarTest.SigarMain 
 at java.net.URLClassLoader $ 1.run（URLClassLoader.java:202）
 at java.security.AccessController.doPrivileged（Native Method）
 at java.net.URLClassLoader.findClass（URLClassLoader.java:190）
 at java.lang.ClassLoader.loadClass（ClassLoader.java:306）
 at sun.misc.Launcher $ AppClassLoader.loadClass（Launcher。 java：301）
 at java.lang.ClassLoader.loadClass（ClassLoader.java:247）
  
请注意，在temp.jar中有SigarTest / bin不正确。执行temp.jar抛出 ClassNotFoundException ，因为 SigarMain 在包中 SigarTest.bin.SigarTest 。现在考虑下面的 jar 命令，它使用  -C   dir  strong>选项：
  $ rm -rf temp.jar 
 $ jar cfe temp.jar SigarTest.SigarMain -C SigarTest / bin /。 tools.jar sigar.jar mongo-2.7.3.jar 
 $ jar tf temp.jar 
 META-INF / 
 META-INF / MANIFEST.MF 
 SigarTest / 
 SigarTest / SigarMain.class 
 tools.jar 
 sigar.jar 
 mongo-2.7.3.jar 
 $ java -jar temp.jar 
  
  SigarMain 在正确的软件包中，执行temp.jar不会抛出 ClassNotFoundException 。
 
I have the following directory hierarchy :
SigarTest
 src
    SigarTest
     .java files
 bin
    SigarTest
     .class files
Here,SigarTest is a package name. The root folder is in the bin folder of the jdk.
From there, im running the following command to create a jar file of my project - 
./jar cfe temp.jar SigarTest.SigarMain SigarTest/bin/ tools.jar sigar.jar mongo-2.7.3.jar
where tools.jar, mongo-2.7.3.jar and sigar.jar are required and are in the same folder as root directory (bin folder of jdk). However, on running it, i get
ClassNotFoundException : SigarTest.SigarMain
What am i doing wrong ?
解决方案
Use the -C dir option which 

  
Temporarily changes directories (cd dir) during execution of the jar command while processing the following inputfiles argument.
If you execute the jar command in your question and list the contents of temp.jar, you will see output similar to the following:
$ rm -rf temp.jar
$ jar cfe temp.jar SigarTest.SigarMain SigarTest/bin/ tools.jar sigar.jar mongo-2.7.3.jar
$ jar tf temp.jar
META-INF/
META-INF/MANIFEST.MF
SigarTest/bin/
SigarTest/bin/SigarTest/
SigarTest/bin/SigarTest/SigarMain.class
tools.jar
sigar.jar
mongo-2.7.3.jar
$ java -jar temp.jar
Exception in thread "main" java.lang.NoClassDefFoundError: SigarTest/SigarMain
Caused by: java.lang.ClassNotFoundException: SigarTest.SigarMain
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Note that having SigarTest/bin in temp.jar is incorrect. Executing temp.jar throws the ClassNotFoundException since SigarMain is in package SigarTest.bin.SigarTest. Now consider the following jar command that uses the -C dir option:
$ rm -rf temp.jar
$ jar cfe temp.jar SigarTest.SigarMain -C SigarTest/bin/ . tools.jar sigar.jar mongo-2.7.3.jar
$ jar tf temp.jar
META-INF/
META-INF/MANIFEST.MF
SigarTest/
SigarTest/SigarMain.class
tools.jar
sigar.jar
mongo-2.7.3.jar
$ java -jar temp.jar
SigarMain is in the correct package and executing temp.jar does not throw a ClassNotFoundException.

                        
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