Linux下运行Java的两种方法


查看Java相关信息:

/opt/app/dev/wangli$ java -?

Usage: java [-options] class [args...]

           (to execute a class)

   or  java [-options] -jar jarfile [args...]

           (to execute a jar file)

where options include:

    -d32          use a 32-bit data model if available

    -d64          use a 64-bit data model if available

    -server       to select the "server" VM

                  The default VM is server.

    -cp <class search path of directories and zip/jar files>

    -classpath <class search path of directories and zip/jar files>

                  A : separated list of directories, JAR archives,

                  and ZIP archives to search for class files.

    -D<name>=<value>

                  set a system property

    -verbose[:class|gc|jni]

                  enable verbose output

    -version      print product version and exit

    -version:<value>

                  require the specified version to run

    -showversion  print product version and continue

    -jre-restrict-search | -jre-no-restrict-search

                  include/exclude user private JREs in the version search

    -? -help      print this help message

    -X            print help on non-standard options

    -ea[:<packagename>...|:<classname>]

    -enableassertions[:<packagename>...|:<classname>]

                  enable assertions with specified granularity

    -da[:<packagename>...|:<classname>]

    -disableassertions[:<packagename>...|:<classname>]

                  disable assertions with specified granularity

    -esa | -enablesystemassertions

                  enable system assertions

    -dsa | -disablesystemassertions

                  disable system assertions

    -agentlib:<libname>[=<options>]

                  load native agent library <libname>, e.g. -agentlib:hprof

                  see also, -agentlib:jdwp=help and -agentlib:hprof=help

    -agentpath:<pathname>[=<options>]

                  load native agent library by full pathname

    -javaagent:<jarpath>[=<options>]

                  load Java programming language agent, see java.lang.instrument

    -splash:<imagepath>

                  show splash screen with specified image

See http://java.sun.com/javase/reference for more details.

 

至此,结果很明了,两种写法:

Usage: java [-options] class [args...]

           (to execute a class)

   or  java [-options] -jar jarfile [args...]

           (to execute a jar file)

 

所以,上文中,

我的第一种写法:java -cp TEST.jar -Dfile.encoding=gbk abc.test CKIFPD.cfg

JVM理解成了执行一个class,即java [-options] class [args...],所以class abc.test后面的被当成了args;

 

我的第二种写法:java -jar TEST.jar -Dfile.encoding=gbk abc.test CKIFPD.cfg

JVM理解成了执行一个jar,即java [-options] -jar jarfile [args...],所以-jar TEST.jar后面的都被当成了args。

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