管理配置文件

建立管理读取配置文件类:

public class ConfigManager {

    private static final Log log = LogFactory.getLog(ConfigManager.class);

    private static Configuration config;

    private static ConfigManager instance;

    private ConfigManager() {
        loadConfig();
    }

    public static ConfigManager getInstance() {
        if (instance == null) {
            synchronized (ConfigManager.class) {
                instance = new ConfigManager();
            }
        }
        return instance;
    }

    public void loadConfig() {
        loadConfig("config.xml");
    }

    public void loadConfig(String configFileName) {
        try {
            ConfigurationFactory factory = new ConfigurationFactory(
                    configFileName);
            config = factory.getConfiguration();
            log.info("Configuration loaded: " + configFileName);
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
            throw new RuntimeException("Configuration loading error: "
                    + configFileName, ex);
        }
    }

    public Configuration getConfig() {
        return config;
    }

}

 读取配置文件类：

public class Config {

    public static String getString(String key) {
        return ConfigManager.getInstance().getConfig().getString(key);
    }

    public static String getString(String key, String def) {
        return ConfigManager.getInstance().getConfig().getString(key, def);
    }

    public static int getInt(String key) {
        return ConfigManager.getInstance().getConfig().getInt(key);
    }

    public static int getInt(String key, int def) {
        return ConfigManager.getInstance().getConfig().getInt(key, def);
    }

    public static long getLong(String key) {
        return ConfigManager.getInstance().getConfig().getLong(key);
    }

    public static long getLong(String key, long def) {
        return ConfigManager.getInstance().getConfig().getLong(key, def);
    }

    public static float getFloat(String key) {
        return ConfigManager.getInstance().getConfig().getFloat(key);
    }

    public static float getFloat(String key, float def) {
        return ConfigManager.getInstance().getConfig().getFloat(key, def);
    }

    public static double getDouble(String key) {
        return ConfigManager.getInstance().getConfig().getDouble(key);
    }

    public static double getDouble(String key, double def) {
        return ConfigManager.getInstance().getConfig().getDouble(key, def);
    }

    public static boolean getBoolean(String key) {
        return ConfigManager.getInstance().getConfig().getBoolean(key);
    }

    public static boolean getBoolean(String key, boolean def) {
        return ConfigManager.getInstance().getConfig().getBoolean(key, def);
    }

    public static String[] getStringArray(String key) {
        return ConfigManager.getInstance().getConfig().getStringArray(key);
    }

    @SuppressWarnings("unchecked")
    public static List getList(String key) {
        return ConfigManager.getInstance().getConfig().getList(key);
    }

    @SuppressWarnings("unchecked")
    public static List getList(String key, List def) {
        return ConfigManager.getInstance().getConfig().getList(key, def);
    }

    public static void setProperty(String key, Object value) {
        ConfigManager.getInstance().getConfig().setProperty(key, value);
    }

}

 配置文件：

config.xml

<?xml version="1.0" encoding="UTF-8" ?>

<configuration>
	<system />
	<properties fileName="config.properties" />
</configuration>

 config.properties  添加key 和value