java对property的操作

import java.io.FileInputStream;
import java.util.Properties;
public class PropTest {    
      public static void main(String[] args)
      {
          Properties prop=new Properties();
          try{
          FileInputStream in=new FileInputStream("E:/workspace/Spell/spell/prop.properties");
          prop.load(in);
          in.close();
          String userName=prop.getProperty("userName");
          String QQ=prop.getProperty("QQ");
          prop.clear();
          System.out.println(userName);
          System.out.println(QQ);
        
          }catch(Exception e)
          {     System.out.print(e.getMessage());}
      }    
}

prop.properties
------------------------------
userName=spell
QQ=281828520

另外个版本，利用Properties的propertyNames方法取得key，然后根据key 取得value.
EnumerationTest.java
-----------------------------
package spell;
//用Properties的propertyNames方法打印出键值
import java.util.*;
import java.io.FileInputStream;

public class EnumerationTest {
public static void main(String[] args) {
   Properties prop=new Properties();
   try{
   prop.load(new FileInputStream("E:/workspace/Spell/spell/prop.properties"));
   Enumeration e=prop.propertyNames();
   while(e.hasMoreElements())
   {
   String key=(String)e.nextElement();
   System.out.print(key+":");
   System.out.println(prop.getProperty(key));
   }
   }catch(Exception e)
   {System.out.print(e);}
}
}

来源：(http://blog.sina.com.cn/s/blog_4a9f789a01000anr.html) - java对properties文件的操作_zeus_新浪博客