selectcityservlet.java

基于SSH (struts+spring+hibernate)框架设计的 CRM客户关系管理系统

package com.csu.crm.common.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.csu.crm.common.vo.CrmArea;
import com.csu.crm.common.vo.CrmProvince;

/**
 * 此类用于ajax后台调用,用于处理当点击省份下拉框时,生成 此省份对应的城市列表
 * 
 * @author 3eCRM小组：曾东
 * @since 2007-9-30 下午04:19:56
 * @version 1.0 创建时间：2007-9-30 下午04:19:56,初始版本
 */
public class SelectCityServlet extends HttpServlet {
	
	public SelectCityServlet() {
		super();
	}

	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//request.setCharacterEncoding("gb2312");
		response.setCharacterEncoding("gb2312");
		response.setContentType("text/xml");
		response.setHeader("Cache-Control", "no-cache");		
		
//		Map listAllArea = (Map)request.getSession().getAttribute("mapAllArea");
//		List listAllAreaId = (List)request.getSession().getAttribute("listAllAreaId");
		
		Map listAllProvince = (Map)request.getSession().getAttribute("mapAllProvince");
		
		
		//当前选择的省份id
		String curPrivinceId = request.getParameter("id");		
//		System.out.println("当前选择的省份id : " + curPrivinceId);
		CrmProvince crmProvince = (CrmProvince)listAllProvince.get(curPrivinceId);
//		Set set = (Set)crmProvince.getCrmAreas();
		/**
		 * 这里要设置province的 hibernate配置文件中对应的list lazy为false
		 * 
		 * 
 			<list name="crmAreas" inverse="true" lazy="false">
        	
            <key>
                <column name="PROVINCE_ID" length="10" />
            </key>
            <index>
        		<column name="AREA_ID"></column>
        	</index>
            <one-to-many class="com.csu.crm.common.vo.CrmArea" />
        	</list>
        	
        	private List crmAreas = new ArrayList(0);
		 * 
		 * 
		 */
		Collection haha = (Collection)crmProvince.getCrmAreas();
//		System.out.println("crmProvince.getCrmAreas(); ------ " + haha);
		Iterator it = haha.iterator();
		CrmArea curCrmArea;
		String curCrmAreaId;
		
		StringBuffer sb=new StringBuffer("<state>");
		
		while(it.hasNext()) {
			curCrmArea = (CrmArea)it.next();
			if(curCrmArea != null) {
				curCrmAreaId = curCrmArea.getAreaId();
				
				sb.append("<city>");
				sb.append(curCrmAreaId);
				sb.append("</city>");
			}			
		}
		
		sb.append("</state>");
		System.out.println(sb);
		PrintWriter out=response.getWriter();
		out.write(sb.toString());
		out.close();
		
		
//	 response.setContentType("text/xml");
//	 response.setHeader("Cache-Control", "no-cache");
//	 String state = request.getParameter("state");
//	 StringBuffer sb=new StringBuffer("<state>");	 
//	 sb.append("<city>hangzhou</city><city>huzhou</city>");
//		
//	 sb.append("</state>");
//	 PrintWriter out=response.getWriter();
//	 out.write(sb.toString());
//	 out.close();

	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request,response);
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}