最近寫(xiě)了一個(gè)JSF的動(dòng)態(tài)控件生成框架給項(xiàng)目組使用。昨天有個(gè)同事在使用的過(guò)程中遇到一個(gè)問(wèn)題，就是我生成的帶AjaxSupport的動(dòng)態(tài)控件在調(diào)用他自己寫(xiě)的方法之后出現(xiàn)了整個(gè)頁(yè)面的action均無(wú)效的情況，現(xiàn)象就是，兩個(gè)級(jí)聯(lián)下拉，當(dāng)?shù)匾粋€(gè)下拉選項(xiàng)改變時(shí)，觸發(fā)他寫(xiě)的方法，他改變第二個(gè)下拉，但是當(dāng)重復(fù)該操作之后就無(wú)效了，也沒(méi)有錯(cuò)誤和異常，代碼如下：
同事代碼：
1 public void bignessDangeValueChangeListener(ActionEvent e) {
2 //System.out.println(e.getComponent().getParent().getChildCount());
3 org.ajax4jsf.component.html.HtmlAjaxSupport ajaxSupport = (org.ajax4jsf.component.html.HtmlAjaxSupport)e.getComponent();
4 HtmlSelectOneMenu parent = (HtmlSelectOneMenu)ajaxSupport.getParent();
5 Short value = (Short)parent.getValue();
6 String[] idDetails = parent.getId().split("_");
7 StringBuffer controlId = new StringBuffer();
8 controlId.append(idDetails[0]);
9 if (WebUtil.PROPS_FILE_NAME_TRASH_DISCHARGE.equals(idDetails[0])) {
10 idDetails[1]="hazardousSubstance"; //配置文件中配置的二級(jí)聯(lián)動(dòng)的二級(jí)控件的name字段
11 }
12
13 for (int i = 1;i < idDetails.length;i++){
14 controlId.append("_").append(idDetails[i]);
15 }
16
17 ajaxSupport.setReRender(controlId.toString());
18
19 List<BignessDangerInfo> list = Common.getBignessDangerInfoByObjType(value);
20 List<String> labelList = new ArrayList<String>();
21 List<Integer> valueList = new ArrayList<Integer>();
22 for(BignessDangerInfo bdi : list) {
23 labelList.add(bdi.getObjectName());
24 valueList.add(String.valueOf(bdi.getRecuid()));
25 }
26
27
28
29 if(value == 1 || value == 2 || value == 3 || value == 4) {
30 DynamicControlFactory.initSelectValues(e, idDetails[1], labelList, valueList);
31 } else {
32 List<List<String>> listClear = new ArrayList<List<String>>();
33 List<String> temp1 = new ArrayList<String>();
34 List<String> temp2 = new ArrayList<String>();
35 temp1.add("-1");
36 temp2.add("--請(qǐng)選擇--");
37 listClear.add(temp1);
38 listClear.add(temp2);
39 DynamicControlFactory.initSelectValues(e, idDetails[1], listClear.get(1), listClear.get(0));
40 }
41 }
initSelectValues的相關(guān)代碼：
1
public static void initSelectValues(ActionEvent e, String col, List<String> labels, List<String> values)
2
{
3
try {
4
5 String[] parms = e.getComponent().getParent().getId().split("_");
6 DynamicControlObject dco = getControlObjects().get(parms[0]);
7
8 List<String> colList = dco.getColNameList();
9 String prefix = dco.getFormName() + ":" + parms[0];
10
11 Map cos = new HashMap();
12 String rowIdx = parms[parms.length - 1];
13
14 initSelectOneComponent(findComponent(prefix + "_" + col + "_1" + "_"
15 + rowIdx), values, labels, true);
16 } catch (Exception ex) {
17 ex.printStackTrace();
18
}
19
}
1public static void initSelectOneComponent(UIComponent component,
2 List<String> values, List<String> labels, boolean clearBefore) {
3 try {
4
5 if (component == null || values == null || labels == null
6 )
7 return;
8
9 if (!isMultiValue(component))
10 return;
11
12 Object optionKey = null;
13 String optionLabel = null;
14 ArrayList optionsList = null;
15
16 UISelectItems items = new UISelectItems();
17 optionsList = new ArrayList(values.size());
18 for (int i = 0; i < values.size(); i++) {
19 optionKey = values.get(i);
20 optionLabel = (String)labels.get(i);
21 SelectItem item = new SelectItem(optionKey, optionLabel);
22 optionsList.add(item);
23 }
24 items.setValue(optionsList);
25 if(clearBefore)
26 {
27 List list = component.getChildren();
28 Object obj = null;
29 for(int i = 0;i < list.size(); i ++)
30 {
31 if(list.get(i) instanceof UISelectItems )
32 {
33 obj = list.get(i);
34 break;
35 }
36 }
37 if(obj != null)
38 list.remove(obj);
39 }
40
41 component.getChildren().add(items);
42 } catch (Exception e) {
43 e.printStackTrace();
44 }
45
46 }
檢查了半天，發(fā)現(xiàn)只要不執(zhí)行initSelectValues，都沒(méi)有問(wèn)題，后來(lái)一步一步調(diào)試才發(fā)現(xiàn)，原來(lái)是數(shù)據(jù)類(lèi)型的問(wèn)題，同事傳入的是List<Integer> values，而SelectItem構(gòu)造函數(shù)支持的是鍵值都為String的參數(shù)，數(shù)據(jù)類(lèi)型不對(duì)導(dǎo)致了這一個(gè)奇怪的現(xiàn)象，但后臺(tái)沒(méi)有異常和出錯(cuò)信息讓人很納悶，解決方法就是只要改變值列表為L(zhǎng)ist<String>就可以了。
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posted on 2009-11-18 09:02
TiGERTiAN 閱讀(1526)
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