Struts2之验证框架一（通过覆盖validate()方法）

本文主要是介绍Struts2之验证框架一（通过覆盖validate()方法），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

一：index.jsp代码如下

<%@ taglib uri="/struts-tags" prefix="s"%>

<s:fielderror />
   <s:textfield name="username" label="用户名："></s:textfield><br>
    <s:textfield name="password" label="密码：："></s:textfield>
    <s:submit name="submit" label="提交" align="center" />
   </s:form>
</body>

二：struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="default" extends="struts-default">
       <action name="Validate" class="org.action.ValidationTestAction">
           <result name="success">/success.jsp</result>
            <result name="input">/index.jsp</result>
       </action>
   </package>
</struts>

三：action类

package org.action;

import com.opensymphony.xwork2.ActionSupport;

public class ValidationTestAction extends ActionSupport {
   /**
   *
   */
   private static final long serialVersionUID = 1L;
   private String username;
   private String password;

   public String getUsername() {
       return username;
   }

   public void setUsername(String username) {
       this.username = username;
   }

   public String getPassword() {
       return password;
   }

   public void setPassword(String password) {
       this.password = password;
   }

   @Override
   public String execute() throws Exception {
       // TODO Auto-generated method stub
       System.out.print("输入验证通过");
       return SUCCESS;
   }

   @Override
   public void validate() {

        clearFieldErrors();
       if(username==null || username.trim().equals("")){
           addFieldError("username","用户名是必需的！");
       }
       if(password==null || password.trim().equals("")){
           addFieldError("password","密码是必需的！");
       }
   }

}

四：运行截图