Java FreeMarker模板错误！在struts2中

我在我的类中使用sturts 2基于注释的验证，同时显示操作错误我得到了一个奇怪的“FreeMarker模板错误！”这是我的实体类

@Entity
public class User implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long userid;
    private String userPhoneNumber;
    private String userName;
    private String password;
    private String full_name;
    private String useremail;

    @OneToOne
    private userType usertypeid;

    public Long getUserid() {
        return userid;
    }

    public void setUserid(Long userid) {
        this.userid = userid;
    }

    public String getUserPhoneNumber() {
        return userPhoneNumber;
    }

    @RequiredStringValidator(message = "Enter Phone Number",type = ValidatorType.FIELD)
    public void setUserPhoneNumber(String userPhoneNumber) {
        this.userPhoneNumber = userPhoneNumber;
    }

    public String getUserName() {
        return userName;
    }

    @RequiredStringValidator(message = "Enter User Name",type = ValidatorType.FIELD)
    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPassword() {
        return password;
    }

    @RequiredStringValidator(message = "Enter Password",type = ValidatorType.FIELD)
    public void setPassword(String password) {
        this.password = password;
    }

    public String getFull_name() {
        return full_name;
    }

    @RequiredStringValidator(message = "Enter Full Name",type = ValidatorType.FIELD)
    public void setFull_name(String full_name) {
        this.full_name = full_name;
    }

    public String getUseremail() {
        return useremail;
    }

    @RequiredStringValidator(message = "Enter Email Id",type = ValidatorType.FIELD)
    @EmailValidator(message = "Enter Valid Email Id",type = ValidatorType.FIELD)
    public void setUseremail(String useremail) {
        this.useremail = useremail;
    }

    public userType getUsertypeid() {
        return usertypeid;
    }

    public void setUsertypeid(userType usertypeid) {
        this.usertypeid = usertypeid;
    }

}

这是我的Struts.xml文件操作代码

/AddUser.jsp
用户列表

这是我的jsp页面

使用者
用户名
全名
联系电话
电子邮件Id
密码
用户类型
拯救
重置
取消

提交表单后，即使我提供了有效的详细信息，也会显示此错误

 org.apache.jasper.JasperException: Expression eKey is undefined on line 32, column 23 in template/simple/fielderror.ftl. - Class: freemarker.core.TemplateObject
File: TemplateObject.java
Method: assertNonNull
Line: 125 - freemarker/core/TemplateObject.java:125:-1
at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:570)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:457)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:164)
at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:371)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:275)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)
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:246)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:249)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:249)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:252)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept   (ScopedModelDrivenInterceptor.java:141)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.googlecode.s2hibernate.struts2.plugin.interceptors.SessionTransactionInjectorInterceptor.intercept   (SessionTransactionInjectorInterceptor.java:157)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:562)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter   (StrutsPrepareAndExecuteFilter.java:99)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

---

例外情况是告诉您在何处查找错误：

org.apache.jasper.JasperException:template/simple/fielderror.ftl中第32行第23列未定义表达式eKey-类：freemarker.core.TemplateObject

罪魁祸首是一个

字段错误

，带有不匹配的

字段名

，测试后（在评论中）结果是

全名

，显然整个链中的下划线处理不正确：

...

full\u name

然后应更改为

fullName

，只要使用变量及其Getter和Setter即可：

还要确保拥有所有最新和一致的struts库和插件，以及正确版本的外部依赖项（Hibernate validator等）

---

也就是说，我想给你一些关于变量命名的建议：

对于具有多个单词的变量，请始终使用camelCase：

password

是

password

（一个单词，虽然是复合的），但是

username

和

useremail

应该是

username

和

useremail

。您已经对单个类的6个变量使用了3种不同的约定

由于这些是

User

类的变量，因此避免变量名称中冗余的

User

：userid=id、username=name、userPhoneNumber=phoneNumber等。。。 如果您这样做是为了提高JSP的可读性，那么请避免使用可能混淆的

标记

如果您正在开始，更改数据库列名应该不是一件痛苦的事情。。。否则，请为下一个项目保留这些建议

注意：使用JPA和Hibernate，您可以在persistence.xml中自动使用camelCase变量和带下划线的列名（

phoneNumber

在实体中，

phone\u number

在数据库中）

尝试从全名中删除一个，看看它是否是罪魁祸首。我没有主意了，如果你有另一场战争，仔细检查配置、库、注释的每一个差异，jsp代码…感谢上帝终于解决了。罪魁祸首是全名。刚刚删除了对该变量的验证。我不知道为什么和下划线导致了一个大问题。感谢您的持续帮助和耐心聆听我的业余话语。感谢您的大力帮助。