Struts2中使用一个操作和多个JSP页面进行验证

package com.example.struts2;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {
    private String username;
    private String email;

    // Getters and Setters

    @Override
    public String execute() throws Exception {
        // 业务逻辑处理
        return SUCCESS;
    }

    public void validate() {
        if (username == null || username.trim().isEmpty()) {
            addFieldError("username", "Username is required.");
        }
        if (email == null || email.trim().isEmpty()) {
            addFieldError("email", "Email is required.");
        }
    }
}

<struts>
    <package name="default" extends="struts-default">
        <action name="register" class="com.example.struts2.UserAction">
            <result name="success">/success.jsp</result>
            <result name="input">/register.jsp</result>
        </action>
        <action name="edit" class="com.example.struts2.UserAction">
            <result name="success">/success.jsp</result>
            <result name="input">/edit.jsp</result>
        </action>
    </package>
</struts>

<s:fielderror fieldName="username"/>
<s:fielderror fieldName="email"/>