获取.properties文件

在classes文件夹下放MPI.properties文件，下面方式可取得配置内容

public class MPIProperties {
	private static final String BUNDLE_NAME = "MPI";

	private static final ResourceBundle RESOURCE_BUNDLE = ResourceBundle
			.getBundle(BUNDLE_NAME);

	private MPIProperties() {
	}

	/**
	 * 从MPI属性文件中取得键的值
	 * 
	 * @param key
	 *            键
	 * @return 值
	 */
	public static String getString(String key) {
		try {
			return RESOURCE_BUNDLE.getString(key);
		} catch (MissingResourceException e) {
			return key;
		}
	}
}