Struts2表单提交错误

当我通过表单调用一个操作时，我得到以下错误

No result defined for action com.______.actions.UserAction and result input
        at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:375)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:277)
        at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263)
        at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
        at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
        at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:133)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
        at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
        at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
        at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
        at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
        at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
        at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
        at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
        at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)

我在

invocation.invoke（）

如果我通过URL点击这个动作，它就可以正常工作了

请帮忙

下面是相关的struts.xml片段：

<action name="*Link" method="{1}" class="com.______.actions.UserAction">
    <interceptor-ref name="loggingStack"></interceptor-ref>
    <result name="userInfo" type="tiles">userInfo</result>
    <result name="sessionout" type="tiles">sessionOut</result>
</action>

用户信息
会话输出

---

如果我删除

它可以正常工作。

上述问题已经解决了吗

在我的action类中，我使用

ArrayList

where作为表单提交字符串

---

我将

ArrayList

更改为ArrayList

上述问题是否已解决

在我的action类中，我使用

ArrayList

where作为表单提交字符串

---

我将

ArrayList

更改为ArrayList

什么是

loggingStack

呢？似乎存在转换或验证错误，它正在尝试转到默认结果“input”。loggingStack的定义是什么？是否尝试将“”替换为“”？loggingStack的外观是什么？似乎存在转换或验证错误，它正在尝试转到默认结果“input”。loggingStack的定义是什么？是否尝试将“”替换为“”？