采用commons-configuration包实现属性文件读取的工具类(hive下windows与linux下通用)

原文地址：http://www.open-open.com/lib/view/open1378288465250.html

首先感谢一下。因为以后可能会涉及到hive迁移问题，所以要使用配置文件形式来获取url。

</pre><pre name="code" class="java">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);
}
}

使用的包:  commons-configuration-1.6.jar

 

几点说明:

 1. 采用了单态设计模式,

2.属性文件在classpath目录下.

3. 采用commons-configuration-1.6.jar来读取属性文件