使用List時的NumberFormatException <CustomObject> 在數據表中

Question

我在嘗試在數據表中顯示List時遇到NumberFormatException。 我知道發生此異常的一般原因，但無法確定它在我的情況下適用的位置。

這是我的冰：數據表顯示代碼

<ice:dataTable id="transformations" var="transformationList" width="700"
value="#{ShowStatusBean.transformationStatusList}" rows="10"    
partialTriggers="refreshButton"  autoSubmit="true">

<ice:column>
<ice:outputText value="#{transformationList.businessDate}" />
</ice:column>

<ice:column>
<ice:outputText value="#{transformationList.service}" />
</ice:column>

<ice:column>
<ice:outputText value="#{transformationList.status}" />
</ice:column>

</ice:dataTable>

我的支持bean代碼

public List<TransformationBean> getTransformationStatusList() {
    transformationStatusList = new ArrayList<TransformationBean>();
    transformationStatusList.add(new TransformationBean("2012-01-01", "serviceName", "status1"));
    transformationStatusList.add(new TransformationBean("2012-01-02", "serviceName2", "status2"));
    return transformationStatusList;
}

最后是堆棧跟蹤

    23:59:57 ERROR [f-tuning)'] D2DFaceletViewHandler     - Problem in renderResponse: For input string: "businessDate"
java.lang.NumberFormatException: For input string: "businessDate"
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
    at java.lang.Integer.parseInt(Integer.java:449)
    at java.lang.Integer.parseInt(Integer.java:499)
    at com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyELContext.java:138)
    at com.sun.el.parser.AstValue.getValue(AstValue.java:96)
    at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:183)
    at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
    at com.sun.facelets.el.LegacyValueBinding.getValue(LegacyValueBinding.java:56)
    at javax.faces.component.UIOutput.getValue(UIOutput.java:80)
    at com.icesoft.faces.renderkit.dom_html_basic.OutputTextRenderer.encodeEnd(OutputTextRenderer.java:91)
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:539)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:369)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:364)
    at com.icesoft.faces.component.ext.renderkit.TableRenderer.encodeChildren(TableRenderer.java:896)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:527)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:357)
    at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:95)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:527)
    at com.icesoft.faces.component.util.CustomComponentUtils.renderChild(CustomComponentUtils.java:338)
    at com.icesoft.faces.component.panelpopup.PanelPopupRenderer.encodeBegin(PanelPopupRenderer.java:240)
    at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:515)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:355)
    at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:95)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:527)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:357)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:364)
    at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:95)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:527)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:357)
    at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:95)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:527)
    at com.icesoft.faces.component.util.CustomComponentUtils.renderChild(CustomComponentUtils.java:338)
    at com.icesoft.faces.component.paneltabset.PanelTabSetRenderer.writeTabCell(PanelTabSetRenderer.java:983)
    at com.icesoft.faces.component.paneltabset.PanelTabSetRenderer.encodeEnd(PanelTabSetRenderer.java:422)
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:539)
    at javax.faces.component.UIData.encodeEnd(UIData.java:573)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:369)
    at com.icesoft.faces.renderkit.dom_html_basic.GridRenderer.encodeChildren(GridRenderer.java:207)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:527)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:357)
    at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:95)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:527)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:357)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:364)
    at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:95)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:527)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:357)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:364)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:364)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:364)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:364)
    at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:364)
    at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:95)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:527)
    at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:490)
    at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:495)
    at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:495)
    at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:495)
    at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:495)
    at com.icesoft.faces.facelets.D2DFaceletViewHandler.renderResponse(D2DFaceletViewHandler.java:281)
    at com.icesoft.faces.application.D2DViewHandler.renderView(D2DViewHandler.java:155)
    at com.icesoft.faces.application.ViewHandlerProxy.renderView(ViewHandlerProxy.java:70)
    at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
    at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
    at com.icesoft.faces.webapp.http.core.JsfLifecycleExecutor.apply(JsfLifecycleExecutor.java:51)
    at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.renderCycle(ReceiveSendUpdates.java:171)
    at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.service(ReceiveSendUpdates.java:112)
    at com.icesoft.faces.webapp.http.core.RequestVerifier.service(RequestVerifier.java:65)
    at com.icesoft.faces.webapp.http.servlet.BasicAdaptingServlet.service(BasicAdaptingServlet.java:48)
    at com.icesoft.faces.webapp.http.servlet.SessionVerifier.service(SessionVerifier.java:58)
    at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:55)
    at com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service(SessionDispatcher.java:77)
    at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:55)
    at com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:192)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
    at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:67)
    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
    at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)
    at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3730)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3696)
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
    at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2273)
    at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2179)
    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1490)
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)

還有我的TransformationBean

public class TransformationBean{

    private String businessDate;
    private String service;
    private String status;

    // constructor 
    // getter and setters
    }

我研究了這個問題並發現了很多回復。 但它確實看起來我沒有做任何這些錯誤..所以不確定我錯過了什么。 這些是我發現的關於同一問題的其他鏈接。

從數據庫返回值時的數字格式異常（JPA）

輸入String的NumberFormatException

http://jforum.icesoft.org/JForum/posts/list/16645.page

所有這些都提到從java代碼返回的List <>是一個List of Object []，這就是為什么它試圖通過將屬性視為索引屬性來獲取數組條目。但是，從我的代碼中，很清楚我沒有返回一個Object []列表，而是一個正確定義的List

我還在JUNit Test案例中測試了java代碼，並驗證了返回類型是TransformationBean對象的List。

伙計們，我做得不好？

Answer 1

我能夠解決問題。 不知道問題是什么。 我剛創建了一個包含我的xhtml顯示代碼的新文件，其中包含相同的信息集。 我唯一改變的是將var名稱更改為bean，就像這樣。

    <ice:dataTable id="transformations" var="bean" width="700"
value="#{ShowStatusBean.transformationStatusList}" rows="10"    
partialTriggers="refreshButton"  autoSubmit="true">

<ice:column>
<ice:outputText value="#{bean.businessDate}" />
</ice:column>

<ice:column>
<ice:outputText value="#{bean.service}" />
</ice:column>

<ice:column>
<ice:outputText value="#{bean.status}" />
</ice:column>

</ice:dataTable>`

它開始工作..沒有意義..也許應用服務器緩存一些以前的版本是不正確的..但看起來我的代碼一直是正確的..