java.lang.StringIndexOutOfBoundsException:字符串索引超出范围:com.sun.faces.renderkit.ServerSideStateHelper.getState处为-1 [英] java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at com.sun.faces.renderkit.ServerSideStateHelper.getState

问题描述

当我在不使用<p:tab>的情况下使用此代码时，它会按预期工作，

When I use this code without <p:tab> it works as expected,

<h:form>
    <p:wizard>
        <p:tab title="Test-1">
            <h:form>
                <p:growl id="msg"/>
                <p:selectOneMenu value="#{studentController.departmentIDgenerate}">
                    <f:selectItems value="#{departmentController.departmentList}" var="deparet" itemLabel="#{deparet.departmentName}" itemValue="#{deparet.departmentId}"/>
                    <p:ajax listener="#{studentController.addMessage}" update="msg"/>
                </p:selectOneMenu>            
            </h:form>
        </p:tab>
        <p:tab title="Test-2">
        </p:tab>
    </p:wizard>
</h:form>

但是当我开始使用<p:tab>时，它会引发以下异常:

but when I start using <p:tab>, it throws the below exception:

java.lang.StringIndexOutOfBoundsException: String index out of range: -1
    at java.lang.String.substring(String.java:1937)
    at com.sun.faces.renderkit.ServerSideStateHelper.getState(ServerSideStateHelper.java:266)
    at com.sun.faces.renderkit.ResponseStateManagerImpl.getState(ResponseStateManagerImpl.java:100)

这是怎么引起的，我该如何解决?

How is this caused and how can I solve it?

推荐答案

首先删除外部h:form(包裹<p:wizard>的表单)，因为您在这里有了嵌套的表单(不好)

Lets start by removing the outer h:form (form that wraps the <p:wizard> ) cause you got a nested forms here (which is bad)

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