（急）如何得到系统的环境变量？

如何得到系统的环境变量？ 问题点数：100、回复次数：7Top

1 楼wdydt163（东东）回复于 2003-08-03 13:42:38 得分 10

System.getProperties()Top

2 楼scbb（星际Baby）回复于 2003-08-03 14:13:07 得分 10

import   java.util.*;  
  public   class   TestEnv   {  
   
  public   static   void   main(String[]   args){  
          Properties   prop   =     System.getProperties();  
          Enumeration   e   =   prop.propertyNames();  
          while(e.hasMoreElements())   {  
                  System.out.println(System.getProperty(e.nextElement().toString()));          
                  }      
   
  }  
  }Top

3 楼feiyuegaoshan（飞跃）回复于 2003-08-03 14:19:58 得分 30

You   can't   get   to   the   environment   variables   with   pure   Java   for   security  
  reasons   -   it   was   taken   out   of   the   API   a   while   ago.   If   you   want   to   pass  
  environment   information   in   you'll   have   to   provide   -D<variable-name>=<value>  
  to   the   java   executable,   then   you   can   use   System.getProperty().  
   
  javah   will   generate   C   stubs   for   methods   marked   using   the   "native"   keyword,  
  for   making   calls   from   java   to   C.   You   could   always   build   a   bridge   to   a  
  library   and   then   call   getenv()   from   the   standard   C   libraries.  
   
  If   you're   working   in   Win32   then   you   could   write   a   COM   component   which  
  exposes   the   information   you   need   and   use   J-Integra   (no   I   don't   work   for  
  them)   to   get   access   to   it   from   Java.  
  Top

4 楼wdydt163（东东）回复于 2003-08-03 15:13:37 得分 0

to   feiyuegaoshan:  
  高手啊！！：）Top

5 楼pittzhao（活着）回复于 2003-08-03 15:15:41 得分 0

我的目标→飞跃Top

6 楼lymkelly（柳叶眉）回复于 2003-08-03 16:42:20 得分 0

markTop

7 楼Hodex（小何才露尖尖角）回复于 2003-08-03 16:52:22 得分 50

同意   scbb(星际Baby)    
  如果你只想得到某一个环境变量的话也可以  
  System.getProperty("os.name");之类的  
  Top

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