Struts2 <s:password>密碼範例

在這一章節中，我們建立一個Web工程為：struts2passwd，演示<s:password>的使用。完整的工程目錄結構如下：

在Struts2中，可以使用<s:password>來建立HTML密碼欄位。例如，可以宣告「s:password」鍵屬性或者標籤和名稱屬性。

<s:password key="password" />
//or
<s:textfield label="Password" name="password" />

兩者都產生相同的HTML輸出(在預設的XHTML主題)。

<td class="tdLabel">
  <label for="registerUser_password" class="label">Password:</label>
</td> 
<td>
  <input type="password" name="password" id="registerUser_password"/>
</td>

Struts2 <s:password> 範例

一個頁面，「密碼」和「確認密碼」欄位，並做了驗證，以確保「確認密碼」是與「密碼」相匹配。

1. 屬性檔案

global.properties

#Global messages
username = 用名名
password = 密碼
confirmPassword = 確認密碼
submit = 提交

RegisterAction.properties

#error message
username.required = Username is required
password.required = Password is required
cpassword.required = Confirm password is required
cpassword.notmatch = Confirm password is not match

2. 動作 - Action

RegisterAction.java

package com.yiibai.user.action;

import com.opensymphony.xwork2.ActionSupport;

public class RegisterAction extends ActionSupport{

	private String username;
	private String password;
	private String confirmPassword;
	
	public String getPassword() {
		return password;
	}

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

	public String getConfirmPassword() {
		return confirmPassword;
	}

	public void setConfirmPassword(String confirmPassword) {
		this.confirmPassword = confirmPassword;
	}

	public String getUsername() {
		return username;
	}

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

	//business logic
	public String execute() {

		return "SUCCESS";

	}

	//simple validation
	public void validate(){
		if("".equals(getUsername())){
			addFieldError("username", getText("username.required"));
		}
		if("".equals(getPassword())){
			addFieldError("password", getText("password.required"));
		}
		if("".equals(getConfirmPassword())){
			addFieldError("confirmPassword", getText("cpassword.required"));
		}
		
		if(!(getPassword().equals(getConfirmPassword()))){
			addFieldError("confirmPassword", getText("cpassword.notmatch"));
		}
	}

}

3. 檢視頁面

結果頁面使用 Struts2 的「s:password」標籤來建立一個HTML密碼欄位。

register.jsp

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

<body>
<h1>Struts 2 - password 範例</h1>

<s:form action="registerUser" namespace="/user">

	<s:textfield key="username" />
	<s:password key="password" />
	<s:password key="confirmPassword" />
	
	<s:submit key="submit" name="submit" />
	
</s:form>

</body>
</html>

welcome.jsp

<%@ page contentType="text/html;charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>

<body>
<h1>Struts 2 - password 範例</h1>

<h2>Password : <s:property value="password"/></h2>
<h2>Confirm Password : <s:property value="%{confirmPassword}"/></h2> 

</body>
</html>

4. 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>

   <constant name="struts.custom.i18n.resources" value="global" />
   <constant name="struts.devMode" value="true" />
 	
   <package name="user" namespace="/user" extends="struts-default">
	<action name="register">
		<result>/pages/register.jsp</result>
	</action>
	<action name="registerUser" 
                class="com.yiibai.user.action.RegisterAction">
		<result name="SUCCESS">/pages/welcome.jsp</result>
		<result name="input">/pages/register.jsp</result>
	</action>
   </package>
	
</struts>

5. 執行範例

http://localhost:8080/struts2passwd/user/register.action

參考

Struts2密碼文件