0
我的MapReduce創建wordcount的例子，嘗試使用下面的命令使jar文件：jar - cvf命令沒有運行？
[email protected]:/usr/local/hadoop$ jar -cvf playground/wordcount.jar -C playground/classes
，但它不是在所有的運行，並給了我下面的結果：
[email protected]:/usr/local/hadoop$ jar -cvf playground/wordcount.jar -C playground/classes
Usage: jar {ctxui}[vfm0Me] [jar-file] [manifest-file] [entry-point] [-C dir] files ...
Options:
-c create new archive
-t list table of contents for archive
-x extract named (or all) files from archive
-u update existing archive
-v generate verbose output on standard output
-f specify archive file name
-m include manifest information from specified manifest file
-e specify application entry point for stand-alone application
bundled into an executable jar file
-0 store only; use no ZIP compression
-M do not create a manifest file for the entries
-i generate index information for the specified jar files
-C change to the specified directory and include the following file
If any file is a directory then it is processed recursively.
The manifest file name, the archive file name and the entry point name are
specified in the same order as the 'm', 'f' and 'e' flags.
Example 1: to archive two class files into an archive called classes.jar:
jar cvf classes.jar Foo.class Bar.class
Example 2: use an existing manifest file 'mymanifest' and archive all the
files in the foo/ directory into 'classes.jar':
jar cvfm classes.jar mymanifest -C foo/ .
請糾正，我我錯了。我已經設置了課程路徑。我可以運行已存在的示例，但無法制作jar文件。