在我的Struts-config.xml
文件中,
<action path="/getTareWeight"
type="com.astrazeneca.usbod.scale.actions.GetTareByBarcodeAction"
name ="getTareByBarcodeForm"
scope="request"
validate="true"
input="/jsp/getTareByBarcode.jsp">
<forward name="success" path="/jsp/tareWeightResult.jsp" />
</action>
在扩展GetTareByBarcodeForm
的{{1}}中,以下是getter和setter方法,
ActionForm
在public String getBarcodeString() {
return (this.barcodeString);
}
public void setBarcodeString(String barcodeString) {
this.barcodeString = barcodeString;
}
public String getResult() {
return (this.result);
}
public void setResult(String result) {
this.result = result;
}
文件中,
GetTareByBarcodeAction.java
在public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException{
String target = new String("success");
double tareWeight=0;
String tw = new String("");
GetTareByBarcodeForm gForm = (GetTareByBarcodeForm)form;
String errorString;
StringTokenizer t = new StringTokenizer(gForm.getBarcodeString(),
" \t\n\r\f:,;.");
List barcodeList = new ArrayList();
List tareWeightList = new ArrayList();
while (t.hasMoreTokens()) {
barcodeList.add(t.nextToken().trim());
}
int size = barcodeList.size();
VesselProcessor vproc = VesselProcessor.getInstance();
for(int i=0;i<size;i++)
{
tareWeight = vproc.checkTares((String) barcodeList.get(i));
tw=Double.toString(tareWeight);
tareWeightList.add(barcodeList.get(i));
tareWeightList.add(tw);
String temp = barcodeList.get(i).toString();
gForm.setBarcodeString(temp);
gForm.setResult(tw);
}
request.setAttribute("TAREWEIGHT", tareWeightList);
return (mapping.findForward(target));
}
文件中,我以表格格式打印属性TAREWEIGHT中的值。
tareWeightResult.jsp
当我在weblogic服务器中部署它后尝试运行此功能时,我在日志中出现以下错误。
<logic:present name="TAREWEIGHT">
<logic:iterate id="result" name="TAREWEIGHT">
<tr>
<td>
<bean:write name="result" property="barcodeString"/>
</td>
<td>
<bean:write name="result" property="result"/>
</td>
</tr>
</logic:iterate>
</logic:present>
在这种情况下,有人能让我知道我哪里出错吗?
答案 0 :(得分:1)
据我所知,您的代码中GetTareByBarcodeForm
中没有tareWeightList
个实例:后者包含String
个,所以当bean:write
尝试提取时属性,它不能:String
没有这样的吸气剂。
也许您应该重新审视提取值的逻辑,并将结果包装在适当的实例中。
因此,您的代码应该更像以下内容:
for (int i = 0; i < size; i++) {
tareWeight = vproc.checkTares((String) barcodeList.get(i));
tw = Double.toString(tareWeight);
String temp = barcodeList.get(i).toString();
GetTareByBarcodeForm f = new GetTareByBarcodeForm();
f.setBarcodeString(temp);
f.setResult(tw);
tareWeightList.add(f);
}
这样结果列表(即TAREWEIGHT
传递的结果列表)将包含适当的对象。
但是,这不太好:现在,GetTareByBarcodeForm
扮演两个角色,实际形式和搜索结果条目。所以我强烈建议引入一个新类TareTableEntry
,并且只包含表格详细信息:
for (int i = 0; i < size; i++) {
tareWeight = vproc.checkTares((String) barcodeList.get(i));
TareTableEntry entry = new TareTableEntry();
entry.setBarcodeString(barcodeList.get(i));
entry.setResult(tareWeight);
tareWeightList.add(entry);
}
这是更多的代码,但从长远来看,它会得到回报。
答案 1 :(得分:0)
带有“结果”的id由TAREWEIGHT表示。该对象是否具有barCodeString属性?在我看来,
中的bean名称存在一些问题<bean:write>.