Struts2之基于配置的字段校验

上一篇struts2之输入校验介绍了手动完成输入校验，也即依靠重写validate方法和validateXxx方法，指定请求某个方法时对传入的参数进行校验。

本篇介绍基于配置的字段校验。下面是登录的常见校验：

1、在src目录下创建action类ValidateUserAction

package com.action;

import com.opensymphony.xwork2.ActionSupport;

public class ValidateUserAction extends ActionSupport {

    private String loginid;

    private String loginpwd;

    private String msg;

    //登录

    public String login(){

        msg = "登录成功！";

        return "success";

    }

    public String getLoginid() {

        return loginid;

    }

    public void setLoginid(String loginid) {

        this.loginid = loginid;

    }

    public String getLoginpwd() {

        return loginpwd;

    }

    public void setLoginpwd(String loginpwd) {

        this.loginpwd = loginpwd;

    }

    public String getMsg() {

        return msg;

    }

    public void setMsg(String msg) {

        this.msg = msg;

    }

}

2、在src目录下新建struts.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "struts-2.1.dtd" >

<struts>

    <constant name="struts.enable.DynamicMethodInvocation" value="true"></constant>

    <package name="hello" namespace="/" extends="struts-default">

        <action name="validateUser_*" method="{1}"

            class="com.action.ValidateUserAction">

            <result name="success">/index.jsp</result>

            <result name="input">/login.jsp</result>

        </action>

    </package>

</struts>

3、在WebContent下新建登录页面login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

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

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<link rel="stylesheet" type="text/css" href="css/list.css">

<style>

.bg {

    width: 658px;

    height: 220px;

    background: url(images/login.png);

    padding-top: 20px;

}

</style>

<title>登录</title>

</head>

<body>

    <div style="font-size:25;font-family:微软雅黑">

        <b>请输入个人信息</b>

    </div>

    <form action="validateUser_login.action" method="post">

        <div class="bg">

            <center>

                <p>

                    账号：<input type="text" name="loginid">

                    <span style="color:red; font-size:12px;">${fieldErrors['loginid'][0]}</span>

                </p>

                <p>

                    密码：<input type="text" name="loginpwd">

                    <span style="color:red; font-size:12px;">${fieldErrors['loginpwd'][0] }</span>

                </p>

                <input type="image" src="data:images/sure.jpg">

            </center>

        </div>

    </form>

<body>

</html>

4、在action同级目录下新建ValidateUserAction-validateUser_login-validation.xml配置文件。

文件命名规则：被校验Action的类名-struts.xml中配置的该action的name属性-validate.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE validators PUBLIC

          "-//Apache Struts//XWork Validator 1.0.3//EN"

          "http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">

<validators>

    <field name="loginid"><!--loginid属性-->

        <field-validator type="requiredstring"><!--字符串必填校验器-->

               <message>账号不能为空</message>

        </field-validator>

        <field-validator type="stringlength"><!--字符串长度校验器-->

               <param name="minLength">6</param>

               <param name="maxLength">12</param>

               <message>账号长度必须在${minLength}至${maxLength}之间</message>

        </field-validator>

        <field-validator type="regex"><!--正则表达式校验器-->

              <param name="regexExpression">

                     <![CDATA[(^[^ ]{1,}$)]]>

              </param>

               <message>账号中不允许出现空格</message>

        </field-validator>

    </field>

    <field name="loginpwd"><!--loginpwd属性-->

        <field-validator type="requiredstring"><!--字符串必填校验器-->

               <message>密码不能为空</message>

        </field-validator>

        <field-validator type="stringlength"><!--字符串长度校验器-->

               <param name="minLength">6</param>

               <param name="maxLength">15</param>

               <message>密码长度必须在${minLength}至${maxLength}之间</message>

        </field-validator>

        <field-validator type="regex"><!--正则表达式校验器-->

              <param name="regexExpression">

                     <![CDATA[(^[^ ]{1,}$)]]>

              </param>

               <message>密码中不允许出现空格</message>

        </field-validator>

    </field>

</validators>

以下的项目目录结构图

Struts2之基于配置的字段校验-LMLPHP