java 没有为动作操作定义结果。添加考试和结果输入
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/17184782/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
提示：将鼠标放在中文语句上可以显示对应的英文。显示中英文
时间：2020-11-01 01:14:10 来源:igfitidea点击:
No result defined for action actions.AddExam and result input
提问by Vinay Bangalore Nagaraj
I'm inputting some Data that i want to add to a database. I'm doing it through a form like this:
我正在输入一些我想添加到数据库中的数据。我是通过这样的表格来做的：
<s:form theme="simple" action="addExam">
<div id="reg">
<s:textfield name="exam.name" cssErrorClass="register error"
placeholder="Exam Name" cssClass="register" required="" />
<s:textfield name="exam.minutesAllotted"
placeholder="Minutes Allotted" cssClass="register" required="" />
<s:textfield name="exam.numQuestions"
placeholder="Number Of Questions" cssClass="register" required="" />
<sj:datepicker name="exam.startDate" cssClass="register"
placeholder="Start Date" displayFormat="dd/mm/yy" required="" />
<sj:datepicker name="exam.endDate" cssClass="register"
placeholder="End Date" displayFormat="dd/mm/yy" required="" />
</div>
<!-- Blue Button -->
<s:submit type="button" cssClass="button blue" value="Add" />
</s:form>
Relevant portion of struts.xml:
struts.xml 的相关部分：
<action name="addExam" class="actions.AddExam">
<result name="success" type="chain">display-exams</result>
<result name="error">/add_exam.jsp</result>
</action>
And my action is as follows:
我的操作如下：
public class AddExam extends ActionSupport{
//Has getter and setter with proper naming convention
private Exam exam;
@Override
public String execute()
{
EntityManagerFactory emf = Persistence.createEntityManagerFactory("ExamModulePu");
EntityManager em = emf.createEntityManager();
ExamService service = new ExamServiceImplementation(em);
Exam examResult = service.createExam(exam);
String result;
if(examResult==null)
{
addFieldError("exam.name", "Duplicate Exam Name");
result = SUCCESS;
}
else
result = ERROR;
em.close();
emf.close();
return result;
}
My exam entity looks like this:
我的考试实体如下所示：
@Entity
public class Exam implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@Column(unique = true)
private String name;
private int numQuestions;
private int minutesAllotted;
private Date startDate;
private Date endDate;
@OneToMany(mappedBy = "exam", orphanRemoval = true, cascade = CascadeType.ALL)
private List<Question> questionList;
}
When i input data into this form i get an error "No result defined for action actions.AddExam and result input" with a stacktrace:
当我将数据输入到此表单中时，我收到一个错误“没有为操作操作定义结果。AddExam 和结果输入”和堆栈跟踪：
No result defined for action actions.AddExam and result input
com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:373)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:275)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:249)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:249)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:252)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:546)
org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1008)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)
I thinkit has something to do with the date input not being processed correctly and being set into my exam data member. I can pick a date from the drop down and select it but even if i input an invalid date such as 23/11/51325 it still allows me to submit and gives me the same error. Maybe it's a mismatch of format between my Date variable and the input?
我认为这与未正确处理日期输入并设置到我的考试数据成员中有关。我可以从下拉列表中选择一个日期并选择它，但即使我输入了一个无效的日期，例如 23/11/51325，它仍然允许我提交并给我同样的错误。也许这是我的 Date 变量和输入之间的格式不匹配？
采纳答案by Armaggedon
The result inputis triggered when some validation over the form is not correct. You must add that result into your mapped actiontag over struts.xml:
input当对表单的某些验证不正确时触发结果。您必须将该结果添加到您的映射action标签中struts.xml：
<action name="addExam" class="actions.AddExam">
<result name="success" type="chain">display-exams</result>
<result name="error">/add_exam.jsp</result>
<result name="input">/add_exam.jsp</result>
</action>
Doing that maybe you don't need that <result name="error">.
这样做也许你不需要那个<result name="error">。
回答by Veeranjaneyulu .Kota
you have to define display-examsaction name and mapping in your struts.xml file.
您必须在 struts.xml 文件中定义display-exams操作名称和映射。
