struts2 简单的注册表单输入验证
一 <register.jsp>：
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>welcom register page !</title>
</head>
<s:fielderror></s:fielderror>
<body bgcolor="red">
<form action="register.action" 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="password" name="password"/></td>
</tr>
<tr>
<td>re-password</td>
<td><input type="password" 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>
</form>
</body>
</html>
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二 编写Action类<RegisterAction>:
package com.struts2;
import java.util.Calendar;
import java.util.Date;
import com.opensymphony.xwork2.ActionSupport;
public class RegisterAction extends ActionSupport {
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 {
return SUCCESS;
}
//验证form表单输入信息
public void validate() {
//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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三 配置<struts.xml>:
<?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="default" extends="struts-default">
</action>
<action name="register" class="com.struts2.RegisterAction">
<result name="success">/success.jsp</result>
<result name="input">/register.jsp</result>
</action>
</package>
</struts>
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四 <success.jsp>:
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>welcom success page!</title>
</head>
<!-- 使用EL表达试取值 -->
<body>
<table align="center" width="40%" border="1" bgcolor="cyan">
<tr>
<td>username:</td>
<td>${requestScope.username }</td>
</tr>
<tr>
<td>password</td>
<td>${requestScope.password }</td>
</tr>
<tr>
<td>re-password</td>
<td>${requestScope.repassword }</td>
</tr>
<tr>
<td>age</td>
<td>${requestScope.age }</td>
</tr>
<tr>
<td>birthday</td>
<td>${requestScope.birthday }</td>
</tr>
<tr>
<td>graduation</td>
<td>${requestScope.graduation }</td>
</tr>
</table>
</body>
</html>