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根据 primefaces 文档,选择应该是一个数组。在下面的代码中 bean.selectedUsers 被定义为“HasUsersVO[] selectedUsers”,但数据表的值是 List。填充数据表后单击“确定”按钮时,出现粘贴在底部的转换错误。

                <p:dataTable id="userListTable" value="#{bean.peopleVOList}"
                    var="user" rowClasses="odd even" selection="#{bean.selectedUsers}" rowKey="#{user.userGuid}"
                    <p:column selectionMode="multiple" style="width:18px">
                    </p:column>
.....
.....
</p:dataTable>

错误

22:59:16,962 INFO  [class com.zreflect.emyed.managedbean.circle.CircleController] (http--127.0.0.1-8080-3) *******************Outside getUsersList********************
22:59:38,943 WARNING [javax.enterprise.resource.webcontainer.jsf.lifecycle] (http--127.0.0.1-8080-3) [Lcom.user.PeopleVO; cannot be cast to java.util.Collection: java.lang.ClassCastException: [Lcom.user.PeopleVO; cannot be cast to java.util.Collection
    at org.primefaces.component.datatable.DataTable.getRowData(DataTable.java:835) [primefaces-3.3.1.jar:]
    at org.primefaces.component.datatable.DataHelper.decodeMultipleSelection(DataHelper.java:262) [primefaces-3.3.1.jar:]
    at org.primefaces.component.datatable.DataHelper.decodeSelection(DataHelper.java:240) [primefaces-3.3.1.jar:]
    at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:72) [primefaces-3.3.1.jar:]
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1 回答 1

5

异常消息和堆栈跟踪表明您PeopleVO[]#{bean.peopleVOList}. 这个不对。它必须是一个Collection,最好是一个ArrayList<PeopleVO>

private List<PeopleVO> peopleVOList;

#{bean.selectedUsers}必须确实是PeopleVO[]一个. 那部分很好。

于 2012-08-06T11:17:24.187 回答