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> 物质类别: <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> <html:select property="m_lbbm_se" styleId="m_lbbm_se" onchange="Change_Select2()"> <html:option value="0"> </html:option> </html:select> <html:select property="m_lbbm_th" styleId="m_lbbm_th" onchange="Change_Select3()"> <html:option value="0"> </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; } } （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |