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Easyui的combobox實現(xiàn)動態(tài)數(shù)據(jù)級聯(lián)效果

更新時間：2016年06月12日 15:14:42 作者：海潛

這篇文章主要介紹了Easyui的combobox實現(xiàn)動態(tài)數(shù)據(jù)級聯(lián)效果的相關(guān)資料，感興趣的小伙伴們可以參考一下

實現(xiàn)從數(shù)據(jù)庫中動態(tài)獲取對應(yīng)的List集合，并在Easyui的combobox中顯示出來。

實現(xiàn)的效果如下：

1、數(shù)據(jù)庫的表設(shè)計如圖所示

2、數(shù)據(jù)庫中填寫相關(guān)的數(shù)據(jù)，如圖所示。如圖所示【法律法規(guī)】是所屬欄目，因此他的字段parentid是0?！局袊癯鰢?、【內(nèi)地居民往來港澳】是屬于法律法規(guī)的類別。因此他們的字段parentid是對應(yīng)1，【法律法規(guī)】的字段categoryid是1.

3、相關(guān)的配置：已經(jīng)在前面的博客中寫了http://www.fzitv.net/article/86381.htm

這里就不多寫。只把關(guān)鍵代碼貼出來。

4、對應(yīng)的Action代碼

package crj.portal.web.management.action;


import java.io.IOException;
import java.util.List;

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

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

import org.apache.log4j.Logger;
import org.apache.struts2.ServletActionContext;
import org.hibernate.Criteria;
import org.hibernate.criterion.Order;

import com.sun.tools.javac.util.Log;

import crj.portal.web.management.model.Cpersontypetbl;
import crj.portal.web.management.service.CategoryService;
import crj.portal.web.management.service.ItemService;
import crj.portal.web.management.service.UserService;


public class ItemManageAction {


 Logger log=Logger.getLogger(this.getClass());
 
 private String page;
 private String rows;
 
 private String lanmuid;
 
 private ItemService itemService;// 依賴注入
 
 
 //下拉框--查詢欄目
 public String categorytbl() throws Exception{
 List list=itemService.queryLanMu();
 this.toJsonArray(list);
 return null;
 }
 
 //根據(jù)欄目的ID 查詢擁有的類別
 public String leibie() throws Exception{
 List list=itemService.queryLeiBie(lanmuid);
 this.toJsonArray(list);
 return null;
 }
 
 public String toJsonArray(List list) throws IOException{
 HttpServletResponse response = ServletActionContext.getResponse();
 HttpServletRequest request = ServletActionContext.getRequest();
 
 JSONArray json = JSONArray.fromObject(list);
 log.info("JSON格式：" +json.toString()); 
  response.setCharacterEncoding("utf-8");// 指定為utf-8
  response.getWriter().write(json.toString());// 轉(zhuǎn)化為JSOn格式
 return null;
 }
 
 public String save() throws Exception {
 return this.alllist();
 }


 public ItemService getItemService() {
 return itemService;
 }

 public void setItemService(ItemService itemService) {
 this.itemService = itemService;
 }

 public String getPage() {
 return page;
 }

 public void setPage(String page) {
 this.page = page;
 }

 public String getRows() {
 return rows;
 }

 public void setRows(String rows) {
 this.rows = rows;
 }

 public UserService getUserService() {
 return userService;
 }

 public void setUserService(UserService userService) {
 this.userService = userService;
 }

 public CategoryService getCategoryService() {
 return categoryService;
 }

 public void setCategoryService(CategoryService categoryService) {
 this.categoryService = categoryService;
 }

 public String getLanmuid() {
 return lanmuid;
 }

 public void setLanmuid(String lanmuid) {
 this.lanmuid = lanmuid;
 }
 
 

}

5、對應(yīng)的接口代碼

public interface ItemService {
 
 //下拉框--查詢欄目
 public List queryLanMu() throws Exception;
 
 //下拉框--查詢類別
 public List queryLeiBie(String ids) throws Exception; 
 
}

6、對應(yīng)的接口實現(xiàn)類代碼

public class ItemServiceImpl implements ItemService {
 Logger log = Logger.getLogger(this.getClass());
 private SessionFactory sessionFactory;

 //下拉框--查詢欄目
 public List queryLanMu() throws Exception {
 Criteria criteria=this.sessionFactory.getCurrentSession().createCriteria(Categorytbl.class);
 criteria.add(Restrictions.eq("parentid", 0));
 criteria.addOrder(Order.asc("categoryid"));
 return criteria.list();
 }

 //下拉框--查詢類別
 public List queryLeiBie(String ids) throws Exception {
 int i=Integer.parseInt(ids);
 Criteria criteria=this.sessionFactory.getCurrentSession().createCriteria(Categorytbl.class);
 criteria.add(Restrictions.eq("parentid", i));
 criteria.addOrder(Order.asc("categoryid"));
 return criteria.list();
 }
 public SessionFactory getSessionFactory() {
 return sessionFactory;
 }

 public void setSessionFactory(SessionFactory sessionFactory) {
 this.sessionFactory = sessionFactory;
 }

}

7、對應(yīng)的JSP代碼

<%@ page language="java" errorPage="/error.jsp" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>

<%
 String path = request.getContextPath();
%>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>信息管理</title>
<!-- 引入Jquery -->
<script type="text/javascript" src="<%=path%>/easyui_1.3.2/jquery-1.8.0.min.js" charset="utf-8"></script>
<!-- 引入Jquery_easyui -->
<script type="text/javascript" src="<%=path%>/easyui_1.3.2/jquery.easyui.min.js" charset="utf-8"></script>
<!-- 引入easyUi國際化--中文 -->
<script type="text/javascript" src="<%=path%>/easyui_1.3.2/locale/easyui-lang-zh_CN.js" charset="utf-8"></script>
<!-- 引入easyUi默認(rèn)的CSS格式--藍(lán)色 -->
<link rel="stylesheet" type="text/css" href="<%=path%>/easyui_1.3.2/themes/default/easyui.css" />
<!-- 引入easyUi小圖標(biāo) -->
<link rel="stylesheet" type="text/css" href="<%=path%>/easyui_1.3.2/themes/icon.css" />

<script type="text/javascript">
 /* 初始化下載表格信息 */
 $(function() { 
 // 下拉框選擇控件，下拉框的內(nèi)容是動態(tài)查詢數(shù)據(jù)庫信息
 $('#lanmu').combobox({ 
  url:'itemManage!categorytbl', 
  editable:false, //不可編輯狀態(tài)
  cache: false,
  panelHeight: 'auto',//自動高度適合
  valueField:'categoryid', 
  textField:'categoryName',
  
 onHidePanel: function(){
  $("#leibie").combobox("setValue",'');
 var lanmuid = $('#lanmu').combobox('getValue'); 
 
 $.ajax({
 type: "POST",
 url: "itemManage!leibie?lanmuid="+lanmuid,
 cache: false,
 dataType : "json",
 success: function(data){
 $("#leibie").combobox("loadData",data);
   }
  }); 
  }
   }); 
 
 $('#leibie').combobox({ 
  //url:'itemManage!categorytbl', 
  editable:false, //不可編輯狀態(tài)
  cache: false,
  panelHeight: 'auto',//自動高度適合
  valueField:'categoryid', 
  textField:'categoryName'
 });
 
 });
</script>


</head>
<body>

 
 <!-- 工具攔 -->
 <div id="tb" style="padding: 3px">
 <form >

 <span>所屬欄目:</span> 
 <select id="lanmu" class="lanmu" style="width:160px; border: 1px solid #ccc"> </select>
 <span>類別:</span> 
 <select id="leibie" class="leibie" style="width:160px; border: 1px solid #ccc"> </select>
 
 </form>
 </div>
 
</body>
</html>

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