src/org/nutz/lang/reflect/ReflectTool.java
public static Class<?> getGenericFieldType(Class<?> clazz, Field field) {
        Type fieldType = field.getGenericType();
        return getRealGenericClass(clazz, fieldType);
    }
public static Class<?> getGenericFieldType(Class<?> clazz, Field field) {
        Type fieldType = field.getGenericType();
        return getRealGenericClass(clazz, fieldType);
    }
泛型类clazz,field字段的真实class对象.
@param clazz 泛型class
@param field 字段
@return