countryaction.java

ext-demo,ext简单示例

/**
 * Copyright (c) http://www.hao-se.cn Ltd.,2007 All  rights  reserved.
 */
package cn.haose.action;

import java.util.Date;
import java.util.Iterator;
import java.util.List;

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

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import org.json.me.JSONArray;
import org.json.me.JSONObject;

import cn.haose.model.Country;
import cn.haose.service.CountryService;
import cn.haose.util.JsonMVCUtil;

/**
 * 国别的控制类
 * 
 * @author hao-se.cn（好·色）
 */
public class CountryAction extends DispatchAction {
	/** 国别Service */
	private CountryService countryService;

	public void setCountryService(CountryService countryService) {
		this.countryService = countryService;
	}

	/**
	 * 默认首页动作
	 * 
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return
	 */
	public ActionForward index(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		return mapping.findForward("index");
	}

	/**
	 * 列表或删除动作
	 * 
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return
	 * @throws Exception
	 */
	public ActionForward listOrDelete(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		// 删除动作标识
		String del = request.getParameter("del");
		if (del != null && del.equals("true")) {
			return deleteData(mapping, form, request, response);
		} else {
			return listData(mapping, form, request, response);
		}
	}

	/**
	 * 分页显示列表数据动作
	 * 
	 * @param actionMapping
	 * @param actionForm
	 * @param request
	 * @param response
	 * @return
	 * @throws Exception
	 */
	public ActionForward listData(ActionMapping actionMapping,
			ActionForm actionForm, HttpServletRequest request,
			HttpServletResponse response) throws Exception {

		// 过滤的字段内容
		String filterValue = request.getParameter("filterValue");
		String fieldName = request.getParameter("fieldName");

		// 分页页数
		String start = request.getParameter("start");
		// 一页的数据条数
		String limit = request.getParameter("limit");

		// 取得当前条件下的总记录数
		int totalCount = countryService.findTotalCount(fieldName, filterValue);
		// 取得分页数据
		List<Country> results = countryService.pagingQuery(fieldName,
				filterValue, Integer.parseInt(start), Integer.parseInt(limit));

		JSONObject jsonData = toJSONObject(totalCount, results);

		// push data back to Ajax page
		JsonMVCUtil.jsonResponse(jsonData, request, response);
		
		return null;
	}

	/**
	 * 删除数据动作
	 * 
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return
	 * @throws Exception
	 */
	public ActionForward deleteData(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		String delData = request.getParameter("delData");
		// 删除动作
		if (delData != null) {
			String[] ids = toString(delData);
			for (String id : ids) {
				countryService.deleteCountry(countryService.getCountryById(id));
			}
		}

		// 分页显示
		listData(mapping, form, request, response);

		return null;
	}

	/**
	 * 加载一条数据（用于更新）
	 * 
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return
	 * @throws Exception
	 */
	public ActionForward loadData(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		// get id first
		String countryId = (String) request.getParameter("id").trim();

		Country country = countryService.getCountryById(countryId);

		// push data back to Ajax page
		JsonMVCUtil.jsonResponse(country.toJSONObject(), request, response);

		return null;
	}

	/**
	 * 创建新数据
	 * 
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return
	 * @throws Exception
	 */
	public ActionForward createData(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		Country country = new Country();
		country.setCountryName(request.getParameter("countryName"));
		country.setCountryCode(request.getParameter("countryCode"));
		country.setCreateUser("管理员用户"); // 需要修改

		JSONObject errors = new JSONObject();
		if (!countryService.findBy("countryName", country.getCountryName())
				.isEmpty()) {
			errors.put("failure", true);
			errors.put("errorInfo", "国别名称已经存在，请选择另外一个！");
		} else if (!countryService.findBy("countryCode",
				country.getCountryCode()).isEmpty()) {
			errors.put("failure", true);
			errors.put("errorInfo", "国别代码已经存在，请选择另外一个！");
		}

		if (errors.length() > 0) {
			// set response now with json format
			JsonMVCUtil.jsonErrorsResponse(errors, request, response);
		} else {
			try {
				countryService.saveCountry(country);
				JsonMVCUtil.jsonOkResponse("成功创建国别数据！", request, response);
			} catch (Exception e) {
				JsonMVCUtil.jsonFailResponse("创建国别数据失败, 请检查后再试", request, response);
			}
		}

		return null;
	}

	/**
	 * 更新数据
	 * 
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return
	 * @throws Exception
	 */
	public ActionForward updateData(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		try {
			// get id first
			String countryId = (String) request.getParameter("id").trim();
			Country country = countryService.getCountryById(countryId);
			
			country.setCountryName(request.getParameter("countryName"));
			country.setCountryCode(request.getParameter("countryCode"));
			country.setValidFlag(request.getParameter("validFlag"));
			country.setUpdateUser("管理员更新用户"); // 需要修改
			country.setUpdateDate(new Date());

			countryService.updateCountry(country);

			JsonMVCUtil.jsonOkResponse("成功更新国别数据！", request, response);
		} catch (Exception e) {
			JsonMVCUtil.jsonFailResponse("更新国别数据失败, 请检查后再试", request, response);
		}

		return null;
	}

	/**
	 * 构建json数据
	 * 
	 * @param totalCount 总记录数
	 * @param results 分页数据
	 * @return
	 * @throws Exception
	 */
	private JSONObject toJSONObject(int totalCount, List<Country> results)
			throws Exception {
		JSONObject json = new JSONObject();
		json.put("totalCount", totalCount);

		JSONArray jsonItems = new JSONArray();
		for (Iterator<Country> iter = results.iterator(); iter.hasNext();) {
			jsonItems.put(iter.next().toJSONObject());
		}
		json.put("results", jsonItems);

		return json;
	}

	/**
	 * 解析来至客户端的json数据
	 * 
	 * @param jsonString
	 * @return
	 * @throws Exception
	 */
	private String[] toString(String jsonString) throws Exception {
		String[] ids;
		JSONArray jsonArray = new JSONArray(jsonString);

		ids = new String[jsonArray.length()];
		// loop through - get from json and update
		for (int i = 0; i < jsonArray.length(); i++) {
			JSONObject jsonObject = jsonArray.getJSONObject(i);
			String id = jsonObject.getString("id");
			ids[i] = id;
		}

		return ids;
	}
}