java 读取系统环境变量和值

package system.properties;

import java.util.Enumeration;

import java.util.Properties;

/**

*

*/

public class Info {

/**

* create time：2009-5-21 下午04:34:50

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

Properties p = System.getProperties();

Enumeration<?> pn = p.propertyNames();

//Enumeration en = p.elements();

while(pn.hasMoreElements()){

Object o = pn.nextElement();

System.out.println(o.toString()+"="+p.get(o.toString()));

}

}

}