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我試圖從配置文件存儲庫中獲取名稱和姓氏等屬性,並在jsp中使用液滴顯示它。下面是我的示例代碼: SampleDroplet.java在ATG中從存儲庫中獲取屬性時獲取NullPointerException
public class SampleDroplet extends DynamoServlet {
private Repository mProfileRepository;
@Override
public void service(DynamoHttpServletRequest pReq, DynamoHttpServletResponse pRes)
throws ServletException, IOException {
String lFirstName = null;
String lLastName = null;
String lProfileId = pReq.getParameter("profileId");
try {
RepositoryItem lItem = getProfileRepository().getItem(lProfileId, "user");
lFirstName = (String) lItem.getPropertyValue("firstName");
lLastName = (String) lItem.getPropertyValue("lastName");
} catch (RepositoryException e) {
e.printStackTrace();
}
pReq.setParameter("firstName", lFirstName);
pReq.setParameter("lastName", lLastName);
pReq.serviceParameter("output", pReq, pRes);
}
SampleDroplet.properties
$class=com.tap.droplet.SampleDroplet
scope=global
profileRepository=/atg/userProfiling/ProfileAdaptarRepository
SampleDroplet.jsp
<dsp:page>
<dsp:importbean bean="/atg/userprofiling/Profile" var="profile" />
<dsp:importbean bean="/com/tap/droplet/SampleDroplet" />
<dsp:getvalueof var="profileId" bean="Profile.id"/>
<dsp:droplet name="SampleDroplet">
<dsp:param name="profileId" value="${profileId}" />
<dsp:oparam name="output">
Profile's First Name : <dsp:valueof param="firstName"/>
Last Name : <dsp:valueof param="lastName"/>
</dsp:oparam>
</dsp:droplet>
</dsp:page>
我試過在JSP中,它正在顯示簡檔。但是,當我通過它滴到它是顯示空指針異常
java.lang.NullPointerException
at com.tap.droplet.SampleDroplet.service(SampleDroplet.java:26)
at atg.servlet.DynamoServlet.service(DynamoServlet.java:152)
at atg.taglib.dspjsp.DropletTag.invokeServlet(DropletTag.java:420)
at atg.taglib.dspjsp.DropletTag.doAfterBody(DropletTag.java:705)
at jsp_servlet._test._droplet.__sampledroplet._jsp__tag18(__sampledroplet.java:874)
Truncated. see log file for complete stacktrace
如果有人知道什麼是問題,請幫助我。
在此先感謝
這個問題是在第26行和我們只有代碼的摘錄,我不能告訴你這是在上面。在猜測lProfileId爲空... – bated
是的,在液滴profileId是空的。我試圖在jsp中顯示profileId而沒有液滴,它正在工作,但是數值沒有傳入液滴 –
您可以確認配置文件是否爲瞬態?這可以通過JSP中的Profile.isTransient獲得。 – bated