今天项目中用到了联动的下拉框,这个是经常用的小技巧,就记录了下来,界面如下。
选择前如下:
选择中:
选择后下拉框都是联动的,4个联动下拉框:
jsp页面代码如下:
- <%@ page language="java" contentType="text/html; charset=UTF-8"
- pageEncoding="UTF-8"%>
- <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
- <%@ taglib uri="/struts-tags" prefix="s" %>
- <%
- String ctx = request.getContextPath();
- pageContext.setAttribute("ctx", ctx);
- %>
- <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
- <script type="text/javascript" src="<%=ctx %>/js/jquery.js" ></script>
- <script type="text/javascript" src="<%=ctx%>/ckeditor/ckeditor.js"></script>
- <script type="text/javascript" src="<%=ctx%>/ckfinder/ckfinder.js"></script>
- <title>商家</title>
- <link href="<%=ctx %>/css/class.css" rel="stylesheet" type="text/css">
- <script type="text/javascript" src="<%=ctx %>/js/My97DatePicker/WdatePicker.js"></script>
- <script type="text/javascript">
- function checkFile()
- {
- //获得选择的文件的URL
- var fileURL = document.forms1.logoUplode.value;
- //获得文件的扩展名
- fileURLfileURLSplit = fileURL.split(".");
- fileExt = fileURLSplit[fileURLSplit.length-1].toLowerCase();
- alert(fileURL);
- //判断是否是图片文件
- if (fileExt=="jpg" || fileExt=="bmp" || fileExt=="gif" || fileExt=="png")
- {
- //var obj = document.getElementById('lookpic');
- //obj.src = fileURL;
- return true;
- }
- else
- {
- alert("请选择图片文件");
- return false;
- }
- }
- function onValidate() {
- //提交保存
- //验证
- var dealerId = document.getElementById("dealerId").value;
- var modelId = document.getElementById("tbDealerSales.modelId").value;
- var modelId2 = document.getElementById("tbDealerSales.modelId2").value;
- if(dealerId==""){
- document.getElementById("message").innerHTML = "请选择商家!";
- return false;
- }
- if(modelId==""){
- document.getElementById("message").innerHTML = "请选择车型!";
- return false;
- }
- if(modelId2==""){
- document.getElementById("message").innerHTML = "请选择具体车型,如果没有具体车型请在车型管理中添加";
- return false;
- }
- if(trim(document.getElementById("tbDealerSales.salesPrice").value)=="") {
- document.getElementById("message").innerHTML = "报价不能为空!";
- return false;
- }
- if(trim(document.getElementById("validStime").value)=="") {
- document.getElementById("message").innerHTML = "开始日期不能为空!";
- return false;
- }
- if(trim(document.getElementById("validEtime").value)=="") {
- document.getElementById("message").innerHTML = "结束日期不能为空!";
- return false;
- }
- return true;
- }
- function add(){
- if(onValidate()){
- document.forms[0].action="<%=ctx%>/priceAction!add.action";
- document.forms[0].submit();
- }
- }
- function trim(str){
- return str.replace(/(^\s*)|(\s*$)/g, "");
- }
- function refreshCarBrand(val){
- document.getElementById('tbDealerSales.modelId').options.length = 0;
- carBrand = document.getElementById('carBrand').value;
- //alert(carBrand);
- var str = $.ajax({
- url: '<%=ctx%>/priceAction!getCarModel.action?carBrand=' + val + '&now=' + new Date().getTime(),
- async: false
- }).responseText;
- //str = "[{'name':'1','value':'1'},{'name':'2','value':'2'}]";
- // alert(str);
- str = eval("(" + str + ")");
- for (var i = 0; i < str.length; i++){
- //alert(str[i].value);
- document.getElementById('tbDealerSales.modelId').options[i] = new Option(str[i].name,str[i].value);
- }
- if(document.getElementById('tbDealerSales.modelId').options.length == 0){
- document.getElementById('tbDealerSales.modelId').options[i] = new Option("--暂无数据--","");
- refreshCarBasic("99999");
- }else{
- refreshCarBasic(str[0].value);
- }
- }
- function refreshCarBasic(val){
- document.getElementById('tbDealerSales.modelId2').options.length = 0;
- carBrand = document.getElementById('tbDealerSales.modelId').value;
- //alert(carBrand);
- var str = $.ajax({
- url: '<%=ctx%>/priceAction!getCarDetail.action?carId=' + val + '&now=' + new Date().getTime(),
- async: false
- }).responseText;
- //str = "[{'name':'1','value':'1'},{'name':'2','value':'2'}]";
- str = eval("(" + str + ")");
- for (var i = 0; i < str.length; i++){
- //alert(str[i].value);
- document.getElementById('tbDealerSales.modelId2').options[i] = new Option(str[i].name,str[i].value);
- }
- if(document.getElementById('tbDealerSales.modelId2').options.length == 0){
- document.getElementById('tbDealerSales.modelId2').options[i] = new Option("--暂无数据--","");
- }
- }
- function init(){
- //refreshCarBrand(document.getElementById('carBrand').value);
- //refreshCarBasic(document.getElementById('tbDealerSales.modelId').value);
- }
- function selectCarBrand(val){
- //alert(val);
- var str = $.ajax({
- url: '<%=ctx%>/priceAction!getBand.action?dealerId=' + val ,
- async: false
- }).responseText;
- //alert(str);
- var s = "";
- carBrand = document.getElementById('carBrand');
- var carBrandcarBrandlength = carBrand.options.length;
- for(var i=0;i<carBrandlength;i++){
- if (carBrand.options[i].value == str) {
- carBrand.options[i].selected=true;
- break;
- }
- }
- refreshCarBrand(str);
- }
- </script>
- </head>
- <body onload="init()">
- <table width="100%" border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td width="26" height="25"><img src="<%=ctx %>/p_w_picpaths/main/main01.jpg" width="26" height="15"></td>
- <td width="62" class="bg01">当前位置:</td>
- <td class="bg01"><DIV id="u3_rtf"> 报价> <span class="red">新增报价</span></DIV></td>
- </tr>
- </table>
- <table width="100%" border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td height="4" background="<%=ctx %>/p_w_picpaths/main/main02.gif"><img src="<%=ctx %>/p_w_picpaths/main/main02.gif" width="6" height="4"></td>
- </tr>
- </table>
- <s:form name="forms1" enctype="multipart/form-data" method="post">
- <table border="0" width="70%" border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td>选择商家:</td>
- <td>
- <s:select label="选择商家" cssStyle="width:120pt;" id="dealerId" name="tbDealerSales.dealerId" list="tbDealerInfoList" listKey="dealerId" listValue="dealerName" headerKey="" headerValue="----请选择商家----" theme="simple" onchange="selectCarBrand(this.value)"/>
- <font color="red">*</font>
- </td>
- </tr>
- <tr>
- <td>选择品牌:</td>
- <td>
- <s:select label="选择品牌" cssStyle="width:120pt;" id="carBrand" name="carBrand" list="tbCarBrandList" listKey="brandId" listValue="brandName" headerKey="" headerValue="----请选择品牌----" onchange="refreshCarBrand(this.value)" theme="simple" disabled="true"/>
- <font color="red">*一级/二级品牌,品牌在商家添加的时候已经关联</font>
- </td>
- </tr>
- <tr>
- <td>选择车型:</td>
- <td>
- <s:select id="tbDealerSales.modelId" cssStyle="width:120pt;" name="tbDealerSales.modelId" label="选择车型" list="#{ }" headerKey="" headerValue="----请选择车型----" onchange="refreshCarBasic(this.value)" theme="simple" />
- <font color="red">*</font>
- </td>
- </tr>
- <tr>
- <td>选择具体车型:</td>
- <td>
- <s:select id="tbDealerSales.modelId2" cssStyle="width:120pt;" name="tbDealerSales.modelId2" label="具体车型" list="#{ }" headerKey="" headerValue="----请选择具体车型----" theme="simple"/>
- <font color="red">*</font>
- </td>
- </tr>
- <tr>
- <td>汽车报价:</td>
- <td>
- <input type="text" name="tbDealerSales.salesPrice" id="tbDealerSales.salesPrice" onkeyup="this.value=this.value.replace(/[^\d/.]/g,'')" maxlength='4'/>
- 万<font color="red">*</font>
- </td>
- </tr>
- <tr>
- <td>有效期:</td>
- <td>
- <input name="validStime" id="validStime" class="Wdate" type="text" onFocus="WdatePicker({maxDate:'#F{$dp.$D(\'validEtime\')||\'2020-10-01\'}'})"/>至
- <input name="validEtime" id="validEtime" class="Wdate" type="text" onFocus="WdatePicker({minDate:'#F{$dp.$D(\'validStime\')}',maxDate:'2020-10-01'})"/>
- <font color="red">*</font>
- </td>
- </tr>
- <tr>
- <td><input type="button" value="添加" onclick="add();"/></td>
- <td>
- <input type="button" value="取消" onclick="javascript:history.back();"/>
- <font color="red" id="message"><s:property value="#request.errorMessage"/></font>
- </td>
- </tr>
- </table>
- </s:form>
- </body>
- </html>
后台代码如下:
- public void setCarBasic(String[] idArray){
- List list = testService.getCarDetail(idArray[0]);
- tbCarBasicList = new ArrayList<TbCarBasic>();
- System.out.println("tbCarBasicList.size():" + tbCarBasicList.size());
- }
获取车型代码如下:
- public String getCarModel(){
- System.out.println("carBrand--------------------" + carBrand);
- response().setCharacterEncoding("UTF-8");
- response().setContentType("text/html;charset=UTF-8");
- try {
- StringBuffer sb = new StringBuffer();
- String str = "[{'name':'1','value':'1'},{'name':'2','value':'2'}]";
- List<TbCarBasic> list = testService.getCarModels(carBrand);
- sb.append("[");
- for(int i=0;i<list.size();i++){
- TbCarBasic t = list.get(i);
- if(i==0){
- sb.append("{'name':'"+t.getCarName()+"','value':'"+t.getCarId()+"'}");
- }else{
- sb.append(",{'name':'"+t.getCarName()+"','value':'"+t.getCarId()+"'}");
- }
- }
- sb.append("]");
- // System.out.println(sb.toString());
- response().getWriter().write(sb.toString());
- response().getWriter().close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- return null;
- }
获取具体车型代码如下:
- public String getCarDetail(){
- // System.out.println("--------------------");
- response().setCharacterEncoding("UTF-8");
- response().setContentType("text/html;charset=UTF-8");
- try {
- StringBuffer sb = new StringBuffer();
- String str = "[{'name':'1','value':'1'},{'name':'2','value':'2'}]";
- List<TbCarDetail> list = testService.getCarDetail(carId);
- sb.append("[");
- for(int i=0;i<list.size();i++){
- TbCarDetail t = list.get(i);
- if(i==0){
- sb.append("{'name':'"+t.getModelName()+"','value':'"+t.getModelId()+"'}");
- }else{
- sb.append(",{'name':'"+t.getModelName()+"','value':'"+t.getModelId()+"'}");
- }
- }
- sb.append("]");
- System.out.println(sb.toString());
- response().getWriter().write(sb.toString());
- // response().getWriter().write(str);
- response().getWriter().close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- return null;
- }
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