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Struts2 - 在Tag中使用Properties属性文件（从零开始学习Strust2_04）

2012-03-13 00:42 465 查看

开发环境：

Eclipse IDE for Java EE Developers（下载地址）

struts-2.3.1.2（下载地址）

apache-tomcat-6.0.35（下载地址）

结果图：

使用Properties的好处是可以简化Tag标签的一些内容，同时方便灵活配置资源，例如英文界面和中文界面的切换。

属性文件的应用有几点要求：

（1）RegisterAction.properties的名字和RegisterAction.java名字相同

（2）RegisterAction.properties放在和RegisterAction.java同一个包下

（3）使用的这个特性的页面register.jsp必须是通过Action的Result跳转过来的

web.xml文件没有多少变化，只不过启动的页面从register.jsp改为了index.jsp，原因见下面：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>struts2_20120312_02</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

struts.xml文件增加了一个Action

这是因为在register.jsp中的tag标签中的属性改用key，为了能够使key属性找到properties文件，register.jsp的显示必须是通过某一个Action的结果(Result)跳转过来的。所以增加了一个了name
= registerInput的Action。

<?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.devMode" value="true" />
<package name="default" extends="struts-default">
<action name="RegisterAction" class="com.zeph.struts2.action.RegisterAction">
<result name="success">/regSuccess.jsp</result>
<result name="input">/register.jsp</result>
</action>
<action name="registerInput" class="com.zeph.struts2.action.RegisterAction"
method="input">
<result name="input">/register.jsp</result>
</action>
</package>
</struts>

重点来了，index.jsp和register.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib uri="/struts-tags" prefix="s" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>A action link to Register page to make sure properties can be used</title>
</head>
<body>
<s:url action="registerInput" var="registerInputLink" />
<p>
<a href="${registerInputLink}">Please register</a>
</p>
</body>
</html>

register.jsp中的tag标签改用了属性Key而不是name和Label，但是同样可以达到相同的效果。唯一的要求是这个页面必须是通过Action的Result过来的。<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib uri="/struts-tags" prefix="s"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<s:form action="RegisterAction">
<s:textfield key="userRegInfoBean.account"></s:textfield>
<s:password key="userRegInfoBean.password"></s:password>
<s:password key="userRegInfoBean.pwdValidate"></s:password>
<s:textfield key="userRegInfoBean.realName"></s:textfield>
<s:textfield key="userRegInfoBean.email"></s:textfield>
<s:textfield key="userRegInfoBean.msn"></s:textfield>
<s:textfield key="userRegInfoBean.qq"></s:textfield>
<s:submit></s:submit>
</s:form>
</body>
</html>

regSuccess.jsp没有变化

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib uri="/struts-tags" prefix="s"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
account:
<s:property value="userRegInfoBean.account" />
<br>
real name:
<s:property value="userRegInfoBean.realName" />
<br>
e-mail:
<s:property value="userRegInfoBean.email" />
<br>
MSN:
<s:property value="userRegInfoBean.msn" />
<br>
QQ:
<s:property value="userRegInfoBean.qq" />
</body>
</html>

RegisterAction.java和UserRegInfo.java没有改变

package com.zeph.struts2.action;

import com.opensymphony.xwork2.ActionSupport;
import com.zeph.struts2.bean.UserRegInfo;

public class RegisterAction extends ActionSupport {

private static final long serialVersionUID = 1L;

private UserRegInfo userRegInfoBean;

public UserRegInfo getUserRegInfoBean() {
return userRegInfoBean;
}

public void setUserRegInfoBean(UserRegInfo userRegInfoBean) {
this.userRegInfoBean = userRegInfoBean;
}

@Override
public String execute() throws Exception {
return SUCCESS;
}

@Override
public void validate() {
if (userRegInfoBean.getAccount().length() == 0) {

addFieldError("userRegInfoBean.account", "Account is required.");

}

if (userRegInfoBean.getEmail().length() == 0) {

addFieldError("userRegInfoBean.email", "Email is required.");

}

if (userRegInfoBean.getRealName().length() == 0) {

addFieldError("userRegInfoBean.realName", "Real Name is required.");

}

if (!userRegInfoBean.getPassword().equals(
userRegInfoBean.getPwdValidate())) {
addFieldError("userRegInfoBean.pwdValidate",
"Password input is inconsistent");
}
}

}

package com.zeph.struts2.bean;

public class UserRegInfo {
private String account;
private String password;
private String pwdValidate;
private String realName;
private String email;
private String msn;
private String qq;

public String getAccount() {
return account;
}

public void setAccount(String account) {
this.account = account;
}

public String getPassword() {
return password;
}

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

public String getPwdValidate() {
return pwdValidate;
}

public void setPwdValidate(String pwdValidate) {
this.pwdValidate = pwdValidate;
}

public String getRealName() {
return realName;
}

public void setRealName(String realName) {
this.realName = realName;
}

public String getEmail() {
return email;
}

public void setEmail(String email) {
this.email = email;
}

public String getMsn() {
return msn;
}

public void setMsn(String msn) {
this.msn = msn;
}

public String getQq() {
return qq;
}

public void setQq(String qq) {
this.qq = qq;
}

@Override
public String toString() {
return "Account:" + getAccount() + "Real Name:" + getRealName()
+ "E-Mail:" + getEmail() + "MSN:" + getMsn() + "QQ:" + getQq();
}
}

属性文件Properties的书写

#Created by JInto - www.guh-software.de
#Mon Mar 12 23:45:24 CST 2012
userRegInfoBean.account=Account
userRegInfoBean.email=E-Mail
userRegInfoBean.msn=MSN
userRegInfoBean.password=Password
userRegInfoBean.pwdValidate=Input Password Again
userRegInfoBean.qq=QQ
userRegInfoBean.realName=Real Name

我自己使用了一个Eclipse的插件所以上面有注释

Eclipse插件的下载地址

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标签： properties struts string action passwords eclipse插件

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