讀取資源文件

public class ConfigManage {
        private static final Logger logger = Logger.getLogger(ConfigManage.class);
        private static ConfigManage singleton;
        public static final String PARAM1 = "param1";
        public static final String PARAM2 = "param2";
        private static Hashtable<String, String> confAttris;

        private ConfigManage () {
                initConfig();
        }

        // get single object
        public static synchronized ConfigManage getInstance() {
            if (singleton == null) {
                singleton = new ConfigManage ();
            }
            return singleton;
        }

        public String getValueByKey(String key) {
            if (confAttris == null) {
                initConfig();
            }
            return confAttris.get(key);
        }
	//初始化
        private void initConfig() {
            ResourceBundle rb = ResourceBundle.getBundle( "webconfig", Locale.ENGLISH);
            confAttris = new Hashtable<String, String>();
            try {
                Enumeration iter = rb.getKeys();
                while (iter.hasMoreElements()) {
                    String key = (String) iter.nextElement();
                    System.out.println("key:" + key);
                    confAttris.put(key, rb.getString(key));
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
}

測試：

ConfigManage.getInstance().getValueByKey(ConfigManage.PARAM1);

初始化還可以使用io操作如下：

java.io.InputStream inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStrea("webconfig.properties");
        java.util.Properties props = new java.util.Properties();
        props.load(inputStream);
        props.getProperty(ConfigManage.PARAM1);