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Struts2 表单数据校验

Posted on 2010-03-30 00:43 Gavin.lee 阅读(452) 评论(0)  编辑  收藏 所属分类: SSH2 --Struts2

http://www.blogjava.net/max/archive/2006/11/14/81106.html
All Input Is Evil!

利用Action的validate方法进行的注册表单验证

一、注册输入页面 reg.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    <head>
        <title>welcomme register page !</title>
    </head>
    <s:fielderror></s:fielderror>
    <body bgcolor="red">
        <s:form action="reg" method="post">
            <table align="center" width="40%" border="1" bgcolor="cyan">
                <tr>
                    <td>username:</td>
                    <td><input type="text" name="username" /></td>
                </tr>
                <tr>
                    <td>password:</td>
                    <td><input type="text" name="password" /></td>
                </tr>
                <tr>
                    <td>re-password:</td>
                    <td><input type="text" name="repassword" /></td>
                </tr>
                <tr>
                    <td>age:</td>
                    <td><input type="text" name="age" /></td>
                </tr>
                <tr>
                    <td>
                        birthday:
                    </td>
                    <td>
                        <input type="text" name="birthday" />
                    </td>
                </tr>
                <tr>
                    <td>graduation:</td>
                    <td><input type="text" name="graduation" /></td>
                </tr>
                <tr>
                    <td><input type="submit" value="Submit " /></td>
                    <td><input type="reset" value="Reset " /></td>
                </tr>
            </table>
        </s:form>
    </body>
</html>


二、Struts2 核心配置文件中对RegAction的映射
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <package name="interceptor1" extends="struts-default">
        <action name="reg" class="reg.RegAction">
            <result name="success">/success.jsp</result>
            <result name="input">/reg.jsp</result>
        </action>
    </package>
</struts>

三、执行验证
package reg;

import java.util.Calendar;
import java.util.Date;

import com.opensymphony.xwork2.ActionSupport;

public class RegAction extends ActionSupport {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    private String username;

    private String password;

    private String repassword;

    private int age;

    private Date birthday;

    private Date graduation;

    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;
    }

    public String getRepassword() {
        return repassword;
    }

    public void setRepassword(String repassword) {
        this.repassword = repassword;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    public Date getGraduation() {
        return graduation;
    }

    public void setGraduation(Date graduation) {
        this.graduation = graduation;
    }

    public String execute() throws Exception {
        //DO Register Process
        return SUCCESS;
    }

    // 验证form表单输入信息
    public void validate() {
        this.clearErrorsAndMessages();
        
        // 名字为空 或者长度小于6大于10
        if (null == username || username.length() < 6 || username.length() > 10) {
            this.addFieldError("username", "username invalid");
        }
        
        // 密码为空或者长度小于6或者大于10
        if (null == password || password.length() < 6 || password.length() > 10) {
            this.addFieldError("password", "password invalid");
            // 确认密码为空或者长度小于6或者大于10
        } else if (null == repassword || repassword.length() < 6 || repassword.length() > 10) {
            this.addFieldError("repassword", "re-password invalid");
            // 密码和确认密码值不是一样的
        } else if (!password.equals(repassword)) {
            this.addFieldError("repassword", "re-password and password not accord");
        }
        
        // 年龄长度小于1或者大于150
        if (age < 1 || age > 150) {
            this.addFieldError("age", "age invalid");
        }
        
        // birthday 和 graduation 为空 或者 birthday 在 graduation 之前
        if (null == birthday) {
            this.addFieldError("birthday", "birthday invalid");
        }
        
        if (null == graduation) {
            this.addFieldError("graduation", "graduation invalid");
        }
        
        if (null != birthday && null != graduation) {
            Calendar c1 = Calendar.getInstance();
            c1.setTime(birthday);

            Calendar c2 = Calendar.getInstance();
            c2.setTime(graduation);

            if (c1.before(c2)) {
                this.addFieldError("graduation", "birthday be forword graduation");
            }
        }
        
    }
    
}

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