采用commons-configuration包實現屬性文件讀取的工具類

import org.apache.commons.configuration.CompositeConfiguration;

import org.apache.commons.configuration.ConfigurationException;

import org.apache.commons.configuration.PropertiesConfiguration;

public class PropManager {

/** 
 * @param args 
 */  
public static void main(String[] args) {  

    String jdbcUrl = PropManager.getInstance().getProperty("jdbc.cms.url");  
    String jdbcUsername = PropManager.getInstance().getProperty("jdbc.cms.username");  
    String jdbcPassword = PropManager.getInstance().getProperty("jdbc.cms.password");  

    System.out.println("jdbcUrl:"+jdbcUrl);  
    System.out.println("jdbcUsername:"+jdbcUsername);  
    System.out.println("jdbcPassword:"+jdbcPassword);  

    System.out.println(PropManager.getInstance());  
    System.out.println(PropManager.getInstance());  

}  
private PropManager() {  
}  

private static PropManager propManager;  
public synchronized static PropManager getInstance() {  
    if (propManager == null) {  
        propManager = new PropManager();  
    }  
    return propManager;  
}  

public static CompositeConfiguration config = new CompositeConfiguration();  
static {  
    try {  
        config.addConfiguration(new PropertiesConfiguration("jdbc.properties"));  
    } catch (ConfigurationException e) {  
        e.printStackTrace();  
    }  
}  

public String  getProperty(String key)  
{  
    return config.getString(key);  
}  




}  </pre>

使用的包:  commons-configuration-1.6.jar
 
幾點說明:
 1. 采用了單態設計模式,
2.屬性文件在classpath目錄下.
3. 采用commons-configuration-1.6.jar來讀取屬性文件