Jsp + JS + DBLookup +內部條件，解決方案？

Question

在這里，我有2個標簽查詢，如果要基於列表中以前選擇的項目，也想在帶有條件的文本列表中的JSP中調用它們，這是我的代碼：首先是JS函數：

<script language="javascript">


    var basevalue;
    function checkoutlet(id)
{
    basevalue= document.getElementsById(id).value;
    return basevalue;
}




</script>

這是JSP部分：

<tr>
                <td class="txtMF">Base<span class="txtnbmed"><span class="txtredsmall">*</span></span></td>
                <td class="txtnbmed" Id="base">
                            <html:select property="spotterBase">
                            <option value="">-- Select --</option>
                            <dblookup:DBLookupTagVer2 lookUpName="common.spotter.base" />
                            </html:select>
                        </td>
            </tr>
            <tr>
                <td class="txtMF">Outlet Code</td>
                <td class="txtnbmed">
                            <html:select property="spotterOutlet" onchange="checkoutlet('<%=base%>');">

                            <option value="">-- Select --</option>

                            <script language="javascript">
                             if (basevalue.equals("Branch")){ 
                            </script>

                            <dblookup:DBLookupTagVer2 lookUpName="common.spotter.outletb" />

                            <script language="javascript">
                             } else if (basevalue.equals("Dealer")){ 
                            </script> 

                            <dblookup:DBLookupTagVer2 lookUpName="common.spotter.outletd" />
                             <script language="javascript"> } </script> 
                            </html:select>
                        </td>
            </tr>

對不起，代碼有點亂！ 我需要一些幫助來解決此問題，在此先感謝:)

Answer 1

這是有興趣的人的解決方案：

首先在JS部分：

function checkoutlet()
{
document.forms[0].action = "populate_spotter_instant.do";
document.forms[0].submit();

} 

populate_spotter_instant是一項服務，可幫助立即應用chages，這意味着您只需在表單中編寫內容，struts表單將保存新值，在Service文件中是該服務，其邏輯是從當前表單中獲取值並保存，然后在對象中，類似於以下內容：

private ActionForward doPopulateSpotterInstant(
        ActionMapping mapping,
        SpotterSelectForm spotterForm,
        SessionData sessionData)
        throws Exception
    {
    log.debug("doPopulateSpotterInstant | Begin ");

    SpotterRequestValueObject requestVo = new SpotterRequestValueObject();

    String branchCode2 = getBranchCode(sessionData);
    log.debug("doPopulateSpotterInstant | branchCode:" + branchCode2);

    requestVo.setBranchCode(branchCode2);


    String spotterCode = spotterForm.getSpotterCode();
    log.debug("doPopulateSpotterInstant | spotterCode:" + spotterCode);

    String companyCode = spotterForm.getCompanyCode();
    log.debug("doPopulateSpotterInstant | companyCode:" + companyCode);

    String createdBy = getUserID(sessionData);
    log.debug("doPopulateSpotterInstant | createdBy:" + createdBy);

    Timestamp createTimestamp = new Timestamp(System.currentTimeMillis());
    log.debug("doPopulateSpotterInstant | createdTM:" + createTimestamp);

    requestVo.setSpotterCode(spotterCode);

    Gspotter gSpotter = new Gspotter();
    GspotterPK pk = new GspotterPK();
    pk.setSpCode(spotterCode);
    pk.setComp_code(companyCode);
    gSpotter.setComp_id(pk);
    gSpotter.setName(spotterForm.getSpotterName());
    gSpotter.setSpId(spotterForm.getSpotterId());
    gSpotter.setBr_code(branchCode2);
    gSpotter.setType(spotterForm.getSpotterType());
    gSpotter.setBase(spotterForm.getSpotterBase());
    gSpotter.setOutlet(spotterForm.getSpotterOutlet());
    gSpotter.setDesignation(spotterForm.getDesignation());
    gSpotter.setContact_no(spotterForm.getSpotterContactNo());
    gSpotter.setAddr1(spotterForm.getSpotterAddress1());
    gSpotter.setAddr2(spotterForm.getSpotterAddress2());
    gSpotter.setAddr3(spotterForm.getSpotterAddress3());
    gSpotter.setAddr4(spotterForm.getSpotterAddress4());
    gSpotter.setPostcode(spotterForm.getSpotterPostCode());
    gSpotter.setCreatedBy(createdBy);
    gSpotter.setCreateTimestamp(createTimestamp);

    requestVo.setSpotterObj(gSpotter);


    log.debug("doPopulateSpotterInstant | End ");
    return mapping.getInputForward();
    }

好，現在在JSP部分：

<tr>
                <td class="txtMF">Base<span class="txtnbmed"><span class="txtredsmall">*</span></span></td>
                <td class="txtnbmed" id="base">
                            <html:select property="spotterBase" onchange="javascript:checkoutlet();">
                            <option value="">-- Select --</option>
                            <dblookup:DBLookupTagVer2 lookUpName="common.spotter.base" />
                            </html:select>
                        </td>
            </tr>
            <tr>
                <td class="txtMF">Outlet Code</td>
                <td class="txtnbmed">
                <%

                SpotterSelectForm form = (SpotterSelectForm)request.getAttribute("SpotterSelectForm");

                if(form.getSpotterBase() == null){
                 %>         <html:select property="spotterOutlet" disabled="true">

                            <option value="">-- Select --</option>                              
                            <dblookup:DBLookupTagVer2 lookUpName="common.spotter.outletd" >

                            </dblookup:DBLookupTagVer2>

                            </html:select>

                <%
                }else if(form.getSpotterBase() == 'B'){
                %>
                <html:select property="spotterOutlet">

                            <option value="">-- Select --</option>                              
                            <dblookup:DBLookupTagVer2 lookUpName="common.spotter.outletb" >

                            </dblookup:DBLookupTagVer2>

                            </html:select>
                <%
                }else if(form.getSpotterBase() == 'D'){
                 %>

                            <html:select property="spotterOutlet" >

                            <option value="">-- Select --</option>                              
                            <dblookup:DBLookupTagVer2 lookUpName="common.spotter.outletd" >

                            </dblookup:DBLookupTagVer2>

                            </html:select>


                <%
                }else {
                 %>         <html:select property="spotterOutlet" disabled="true">

                            <option value="">-- Select --</option>                              
                            <dblookup:DBLookupTagVer2 lookUpName="common.spotter.outletd" >

                            </dblookup:DBLookupTagVer2>

                            </html:select>

                <%
                }
                 %>

                        </td>
            </tr>

如您所見，我已經使用Scriplets實例化表單並使用其屬性，因為已經保存了當前表單的值並在Base Dorp down輸入中調用了JS方法，因此當我更改Base值時，所有表單值將為重新填充，然后我的商店將可以訪問新的Base值，並以此為基礎，將引用這些QueryTag的合適查詢無效：

<query cacheDuration="90000" cacheMaxRows="100" key="common.spotter.outletb" toCache="true">
    <stmt>
    <![CDATA[
    SELECT BIBRCD, BIBRCD||'-'||BIBRNM from e31dlib3.GBRANCH where BIBRTY='B' AND BIRS='A'
    ]]>
    </stmt>
</query>
<query cacheDuration="90000" cacheMaxRows="100" key="common.spotter.outletd" toCache="true">
    <stmt>
    <![CDATA[
    SELECT BIBRCD, BIBRCD||'-'||BIBRNM from e31dlib3.GBRANCH where BIBRTY='D' AND BIRS='A'
    ]]>
    </stmt>
</query>

僅此而已，一切就完成了，而且對我而言，它非常完美，即使我不知道足夠的細節！