dataaction.java

extjs与Struts整合以及与后台数据库的交互 非常值得学习的一个案例

package com.jtjk.action;

import java.util.HashMap;

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


import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;

public class DataAction extends DispatchAction{

	public ActionForward showData(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		System.out.println("进入showData方法");
		response.setContentType("text/html;charset=utf-8");
//		HashMap valueMap = new HashMap();
//		valueMap.put("appeId", "10");
//		valueMap.put("survId", "1");
//		valueMap.put("location", "");
//		valueMap.put("surveyDate", "2008-03-14");
//		valueMap.put("surveyTime", "12:19:47");
//		valueMap.put("inputUserId", "1");
		JSONObject json = new JSONObject();
		json.put("appeId", "10");
		json.put("survId", "1");
		json.put("location", "");
		json.put("surveyDate", "2008-03-14");
		json.put("surveyTime", "12:19:47");
		json.put("inputUserId", "1");
		System.out.println(json.toString());
		response.getWriter().write("["+json.toString()+"]");
		return null;
	}

	public ActionForward showTree(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		System.out.println("进入showTree方法");
		response.setContentType("text/html;charset=utf-8");
		JSONObject json = new JSONObject();
		String str = "[";
		String id = request.getParameter("id");
		if(id != null && id.equals("1")){
			json.put("id", 2);
			json.put("text", "一级目录");
			json.put("leaf", false);
		} else if(id.equals("2")){
			json.put("id", 3);
			json.put("text", "根目录");
			json.put("leaf", false);
			str = str + json.toString();
//			str = str.substring(0, str.lastIndexOf("}")) + ",";
//			str = str + "children:[";
//			json.put("id", 3);
//			json.put("text", "一级叶子");
//			json.put("leaf", true);
//			json.put("cls", "folder");
//			str = str + json.toString() + "]}";
		} else if(id.equals("3")){
			json.put("id", 4);
			json.put("text", "一级叶子");
			json.put("leaf", true);
			str = str + json.toString();
		}
		str = str +  "]";

		response.getWriter().write(str);
		System.out.println(str);
		return null;
	}
}