Ajax实现三级联动下拉框

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<%@ page contentType = "text/html; charset=GBK" import="java.util.*,com.wehave.hyerp.procurement.domain.Cgsqd"%>

<%@ taglib uri="struts-html" prefix="html" %>

<%@ taglib uri="struts-logic" prefix="logic" %>

<%@ taglib uri="struts-bean" prefix="bean" %>

<html>

<head>

<title> </title>

<link rel = "stylesheet" type = "text/css" href = "../css/olstyle.css">

<SCRIPT type="text/javascript">

var req;

window.onload=function(){

}

function Change_Select()

{

var zhi=document.getElementById('m_gykfwzlbb_lbbm').value;

var url="sqdSelect.go?method=getSkill&id="+zhi;

if(zhi=="0"){

alert("请选择您要察看的信息");

return;

}else{

if(window.XMLHttpRequest)

{

req=new XMLHttpRequest();

}else if(window.ActiveXObject)

{

req=new ActiveXObject("Microsoft.XMLHTTP");

}

if(req)

{

req.open("GET",url,true);

req.onreadystatechange=callback;

req.send(null);

}

}

}

function Change_Select2()

{

var zhi=document.getElementById('m_lbbm_se').value;

//alert(zhi.substring(0,2));

if(zhi=="0"){

alert("请选择您要察看的信息");

return;

}

if(zhi.substring(0,2)=="WY"){

var url="sqdSelect.go?method=getSkill2&id="+zhi;

if(window.XMLHttpRequest)

{

req=new XMLHttpRequest();

}else if(window.ActiveXObject)

{

req=new ActiveXObject("Microsoft.XMLHTTP");

}

if(req)

{

req.open("GET",true);

req.onreadystatechange=callback2;

req.send(null);

}

}else{

parent.topFram.location ="sqdSelectAll.go?method=getlistAll&id="+zhi;

}

}

function Change_Select3()

{

var zhi=document.getElementById('m_lbbm_th').value;

//alert(zhi.substring(0,2));

if(zhi=="0"){

alert("请选择您要察看的信息");

return;

}else{

parent.topFram.location ="sqdSelectAll.go?method=getlistAll2&id="+zhi;

}

}

function callback()

{

if(req.readyState == 4)

{

if(req.status == 200)

{

parseMessage();

}else{

alert("Not able to retrieve description"+req.statusText);

}

}

}

function callback2()

{

if(req.readyState == 4)

{

if(req.status == 200)

{

parseMessage2();

}else{

alert("Not able to retrieve description"+req.statusText);

}

}

}

function parseMessage()

{

var xmlDoc=req.responseXML.documentElement;

var xSel=xmlDoc.getElementsByTagName('select');

var select_root=document.getElementById('m_lbbm_se');

select_root.options.length=0;

for(var i=0;i<xSel.length;i++)

{

var xValue=xSel[i].childNodes[0].firstChild.nodeValue;

var xText=xSel[i].childNodes[1].firstChild.nodeValue;

var option=new Option(xText,xValue);

try{

select_root.add(option);

}catch(e){

}

}

}

function parseMessage2()

{

var xmlDoc=req.responseXML.documentElement;

var xSel=xmlDoc.getElementsByTagName('select');

var select_root=document.getElementById('m_lbbm_th');

select_root.options.length=0;

for(var i=0;i<xSel.length;i++)

{

var xValue=xSel[i].childNodes[0].firstChild.nodeValue;

var xText=xSel[i].childNodes[1].firstChild.nodeValue;

var option=new Option(xText,xValue);

try{

select_root.add(option);

}catch(e){

}

}

}

</SCRIPT>

</head>

<body bgcolor = "#C8D0D4">

<html:form action="/cgsqdNewAction.go">

<TABLE class = "cbToolbar" id = "idToolbar" cellpadding = '0' cellspacing = '0'>

<TR align = "left" valign = "top" >

<TD NOWRAP>&nbsp;物质类别:&nbsp;&nbsp;

<html:select property="m_gykfwzlbb_lbbm" onchange="Change_Select()">

<html:option value="0">请选择</html:option>

<html:options collection="LbfList" property="m_gykfwzlbb_lbbm" labelProperty="m_gykfwzlbb_lbmc"/>

</html:select> &nbsp;

<html:select property="m_lbbm_se" styleId="m_lbbm_se" onchange="Change_Select2()">

<html:option value="0">&nbsp;&nbsp;&nbsp;</html:option>

</html:select>

<html:select property="m_lbbm_th" styleId="m_lbbm_th" onchange="Change_Select3()">

<html:option value="0">&nbsp;&nbsp;&nbsp;</html:option>

</html:select>

</TD>

</tr>

</table>

</html:form>

</body>

</html>

action中的代码

/** *//**

*

* 查询物质编码类别列表操作(一级)

* */

public ActionForward doSelectWzlb(

ActionMapping mapping,

ActionForm form,

HttpServletRequest req,

HttpServletResponse res) {

HttpSession session = req.getSession();

UserSession userSession =

(UserSession) session.getAttribute("userSession");

permission.setUserID(userSession.getUserId());

permission.setUserName(userSession.getUserName());

permission.setModuleName("m_cgsqd");

permission.setActionStr("'m_select'");

if(permissionService.checkUserPermission(permission)){

int updateSign=0;

try{

cgsqdService.updateCgsqwzhzb_sqsl();

updateSign=1;

}catch(Exception e){

e.printStackTrace();

updateSign=0;

}

if(updateSign==1){

List LbfList=cgsqdService.treeListWzlb2();

req.setAttribute("LbfList",LbfList);

return mapping.findForward("tools");

}else{

return null;

}

}else{

return mapping.findForward("failure");

}

}

/** *//**

*

* 查询物质编码类别列表操作(二级)

* */

public ActionForward doSelectWzlb1(

ActionMapping mapping,LbfList);

return mapping.findForward("tools1");

}else{

return null;

}

}else{

return mapping.findForward("failure");

}

}

/** *//**

*

* 查询物质编码类别列表操作(三级)

* */

public ActionForward getSkill(

ActionMapping mapping,

HttpServletResponse res) {

HttpSession session = req.getSession();

UserSession userSession =

(UserSession) session.getAttribute("userSession");

permission.setUserID(userSession.getUserId());

permission.setUserName(userSession.getUserName());

permission.setModuleName("m_cgsqd");

permission.setActionStr("'m_select'");

if(permissionService.checkUserPermission(permission)){

String id=req.getParameter("id");

res.setContentType("text/xml;charset=GBK");

res.setHeader("Cache-Control","no-cache");

String xml_start="<?xml version=/"1.0/" encoding=/"GBK/"?>";

xml_start+="<selects>";

String xml_end="</selects>";

String xml="<select><value>0</value><text>请选择</text></select>";

String m_lbbm_se="";

String m_lbmc_se="";

List LbfList=null;

if(id.equals("WY")){

LbfList=cgsqdService.treeListWzlb3_2(id);

}else{

LbfList=cgsqdService.treeListWzlb3_1(id);

}

Iterator it=LbfList.iterator();

while(it.hasNext()){

Cgsqd cgsqd=(Cgsqd)it.next();

m_lbbm_se=cgsqd.getM_gykfwzlbb_lbbm();

m_lbmc_se=cgsqd.getM_gykfwzlbb_lbmc();

xml +="<select><value>"+m_lbbm_se+"</value><text>"+m_lbmc_se+"</text></select>";

}

String last_xml=xml_start+xml+xml_end;

logger.debug("XML是:"+last_xml);

try {

res.getWriter().write(last_xml);

} catch (IOException e) {

e.printStackTrace();

}

return null;

}else{

return null;

}

}

原文链接:https://www.f2er.com/ajax/166306.html

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