我尝试使用Struts2 validations annotation验证表单，但它似乎不起作用，也没有在标签上显示所需的标记。下面是我的代码：

login.jsp：

<s:form  action="/Login"  validate = "true">    
<table>
  <tr>
    <td><s:label theme=”simple” required="true">Username :</s:label></td>
    <td><s:textfield name="userName" theme=”simple” /></td>
  </tr>
  <tr>
    <td><s:label theme=”simple” required="true">Password :</s:label></td>
    <td><s:textfield name="password" theme=”simple” /></td>
  </tr>
  <tr>
      <td><s:submit  value="Login" /></td>
  </tr>
</table>
</s:form>

字符串

LoginAction.java：

public class LoginAction extends ActionSupport {
    private String userName;
    private String password;
        
    @Validations(requiredStrings={@RequiredStringValidator(type=ValidatorType.FIELD, message="User Name can ot be empty.", fieldName="userName")})
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
        
    @Validations(requiredStrings={@RequiredStringValidator(type=ValidatorType.FIELD, message="Password can ot be empty.", fieldName="password" )})
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    
    public String execute()
    {
        return SUCCESS;
    }
}

型

struts.xml：

<struts>
    <package name="demo" extends="struts-default">
        <action name="*" class="mypkg.action.{0}Action">
            <result name="success">/success.jsp</result>
            <result name="input">/index.jsp</result>
        </action>
    </package>
</struts>

型
有人可以帮助和注意到，如果有什么问题，我的代码？