zTree实现地市县三级级联DAO接口实现[通俗易懂]

/**
 * @Title:ProvinceDaoImpl.java
 * @Package:com.gwtjs.dao.impl
 * @Description:省份地市县级三级级联DAO接口实现
 * @author:Youhaidong(游海东)
 * @date:2014-5-10 下午10:40:35
 * @version V1.0
 */
package com.gwtjs.dao.impl;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang.StringUtils;
import org.hibernate.SQLQuery;
import org.springframework.stereotype.Repository;

import com.gwtjs.dao.ProvinceDao;
import com.gwtjs.model.Province;

/**
 * 类功能说明
 * 类改动者 改动日期
 * 改动说明
 * <p>Title:ProvinceDaoImpl.java</p>
 * <p>Description:游海东个人开发</p>
 * <p>Copyright:Copyright(c)2013</p>
 * @author:游海东
 * @date:2014-5-10 下午10:40:35
 * @version V1.0
 */
@Repository(value = "provinceDao")
public class ProvinceDaoImpl extends GenericDaoImpl<Province, Long> implements ProvinceDao 
{
	/**
	 * 
	 * @Title:findArea
	 * @Description:
	 * @param:@param provinceCode 省份编码
	 * @param:@param cityCode     地市编码
	 * @param:@param countyCode   县级编码
	 * @param:@return
	 * @return:List<Province>
	 * @throws
	 */
	@SuppressWarnings("unchecked")
	@Override
	public List<Province> findArea(String provinceCode, String cityCode,String countyCode) 
	{
		List<Province> list = new ArrayList<Province>();
		StringBuilder sb = new StringBuilder();
		sb.append("SELECT t.`province_name`,");
		sb.append("t.`city_name`,");
		sb.append("t.`county_name` ");
		sb.append("FROM t_area_tab t ");
		sb.append("WHERE 1=1 ");
		//推断省份编码不为空
		if(StringUtils.isNotBlank(provinceCode))
		{
			sb.append("AND t.`province_code` = '").append(provinceCode).append("' ");
		}
		//推断地市编码不为空
		if(StringUtils.isNotBlank(cityCode))
		{
			sb.append("AND t.`city_code` = '").append(cityCode).append("' ");
		}
		//推断县级编码不为空
		if(StringUtils.isNotBlank(countyCode))
		{
			sb.append("AND t.`county_code` = '").append(countyCode).append("' ");
		}
		SQLQuery q = getSession().createSQLQuery(sb.toString());
		System.out.println("三级级联SQL语句：" + sb.toString());
		List<Object[]> items = q.list();
		if(null != items && items.size() > 0)
		{
			Province province = null;
			for(Object[] obj:items)
			{
				province = new Province();
				/**
				 * 省份名称
				 */
				province.setProvinceName(null == obj[0]?"":obj[0].toString());
				/**
				 * 地市名称
				 */
				province.setProvinceName(null == obj[0]?"":obj[0].toString());
				/**
				 * 县级名称
				 */
				province.setProvinceName(null == obj[0]?"":obj[0].toString());
				
				list.add(province);
			}
		}
		return list;
	}
}