不需要显式地声明tld路径了

最新推荐文章于 2020-10-21 21:50:54 发布

转载最新推荐文章于 2020-10-21 21:50:54 发布 · 781 阅读

Struts2 专栏收录该内容

45 篇文章

订阅专栏

本文介绍了一个使用Struts2 UI标签的示例项目，包括如何配置Struts2环境、设置过滤器及使用S标签进行表单操作等。通过具体的代码展示了注册过程中的表单输入、数据验证及结果显示。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

struts2里不要再配置tag-lib,在struts-core包里面有tld文件的
使用s标签，引入：
<%@ taglib prefix="s" uri="/struts-tags"%>
这样就可以了。

web.xml

<?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_3_0.xsd"
	id="WebApp_ID" version="3.0">
	<display-name>struts2_2_ui</display-name>
	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>
			org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
		</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
</web-app>

struts.xml

<!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 name="*Register" method="{1}" class="vaannila.RegisterAction">
            <result name="populate">/register.jsp</result>
            <result name="success">/success.jsp</result>
        </action>        
    </package>
</struts>

index.jsp

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<META HTTP-EQUIV="Refresh" CONTENT="0;URL=populateRegister.action">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
</body>
</html>

<%@ 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>Register Page</title>
</head>
<body>
<s:form action="Register">
	<s:textfield name="userName" label="User Name" />
	<s:password name="password" label="Password" />
	<s:radio name="gender" label="Gender" list="{'Male','Female'}" />
	<s:select name="country" list="countryList" listKey="countryId"
		listValue="countryName" headerKey="0" headerValue="Country"
		label="Select a country" />
	<s:textarea name="about" label="About You" />
	<s:checkboxlist list="communityList" name="community" label="Community" />
	<s:checkbox name="mailingList"
		label="Would you like to join our mailing list?" />
	<s:submit />
</s:form>
</body>
</html>

success.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>Details Page</title>
</head>
<body>
User Name: <s:property value="userName" /><br>
Gender: <s:property value="gender" /><br>
Country: <s:property value="country" /><br>
About You: <s:property value="about" /><br>
Community: <s:property value="community" /><br>
Mailing List: <s:property value="mailingList" />
</body>
</html>

package vaannila;

import java.util.ArrayList;

import com.opensymphony.xwork2.ActionSupport;

public class RegisterAction extends ActionSupport {
	
	private String userName;
	
	private String password;
	
	private String gender;
	
	private String about;
	
	private String country;
	
	private ArrayList<Country> countryList;
	
	private String[] community;
	
	private ArrayList<String> communityList;
	
	private Boolean  mailingList;

	public String populate() {

		countryList = new ArrayList<Country>();
		countryList.add(new Country(1, "India"));
		countryList.add(new Country(2, "USA"));
		countryList.add(new Country(3, "France"));
		
		communityList = new ArrayList<String>();
		communityList.add("Java");
		communityList.add(".Net");
		communityList.add("SOA");
		
		community = new String[]{"Java",".Net"};
		mailingList = true;
		
		return "populate";
	}

	public String execute() {
		return SUCCESS;
	}

	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 getGender() {
		return gender;
	}

	public void setGender(String gender) {
		this.gender = gender;
	}

	public String getAbout() {
		return about;
	}

	public void setAbout(String about) {
		this.about = about;
	}

	public String getCountry() {
		return country;
	}

	public void setCountry(String country) {
		this.country = country;
	}

	public ArrayList<Country> getCountryList() {
		return countryList;
	}

	public void setCountryList(ArrayList<Country> countryList) {
		this.countryList = countryList;
	}

	public String[] getCommunity() {
		return community;
	}

	public void setCommunity(String[] community) {
		this.community = community;
	}

	public ArrayList<String> getCommunityList() {
		return communityList;
	}

	public void setCommunityList(ArrayList<String> communityList) {
		this.communityList = communityList;
	}

	public Boolean getMailingList() {
		return mailingList;
	}

	public void setMailingList(Boolean mailingList) {
		this.mailingList = mailingList;
	}

}

程序流程分析
服务器调用index.jsp,其中的下面一句立刻更新页面
<META HTTP-EQUIV="Refresh" CONTENT="0;URL=populateRegister.action">
在struts.xml中找
<action name="*Register" method="{1}" class="vaannila.RegisterAction">
现在调用类vaannila.RegisterAction,用这个类中的populate方法
*号在此代表populate，{1}匹配第一个*号

原文：http://www.dzone.com/tutorials/java/struts-2/struts-2-example/struts-2-ui-tags-example-1.html

源代码：http://pan.baidu.com/share/link?shareid=439362&uk=3878681452

更多例子：http://188029.net/struts2/