src/org/nutz/dao/jdbc/Jdbcs.java
public static ValueAdaptor register(String className, ValueAdaptor adaptor) {
        if (adaptor == null)
            return customValueAdaptorMap.remove(className);
        return customValueAdaptorMap.put(className, adaptor);
    }
public static ValueAdaptor register(String className, ValueAdaptor adaptor) {
        if (adaptor == null)
            return customValueAdaptorMap.remove(className);
        return customValueAdaptorMap.put(className, adaptor);
    }
注册一个自定义ValueAdaptor,若adaptor为null,则取消注册
@param className 类名
@param adaptor 值适配器实例,若为null,则取消注册
@return 原有的值适配器