public ClsUser() {//һʵʱ򣬳ʼ̬Ա
		ClsDb cd = new ClsDb(true);
		if (dimAge == null) {
			dimAge = cd.dimMapper("dim_age", "age", "age_s");
		}
		if (dimEdu == null) {
			dimEdu = cd.dimMapper("dim_edu", "edu", "edu_s");
		}
		if (dimInd == null) {
			dimInd = cd.dimMapper("dim_industry", "industry", "industry_s");
		}
		if (dimOcc == null) {
			dimOcc = cd.dimMapper("dim_occupation", "occupation",
					"occupation_s");
		}
		if (dimCity == null) {
			dimCity = cd.dimMapper("dim_city", "city", "city_s");
		}
		cd.closeDb();
	}