struts（/struts-tags）(#books表达式)（有一点地方还有点问题）(properties文件配置)（还有一些东西不明白）

本文介绍了一个基于Struts2框架的简单应用实例，包括web.xml和struts.xml的配置方法，以及Book.java、BookAction.java等核心类的设计。通过addBook.jsp页面收集用户输入，并展示在showBook.jsp中。

首先配置web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
	
	
  <display-name>StrutsTutorial</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>*.action</url-pattern>
  </filter-mapping>

  <filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>*.jsp</url-pattern>
  </filter-mapping>
    
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

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>
	
    <!-- 引入默认文件(可能就是以前这里没有引入，所以错误啦) -->
    <include file="struts-default.xml"></include>
	<constant name="struts.devMode" value="true"></constant>
	<constant name="struts.i18n.encoding" value="utf-8"></constant>
    
    <!-- package name属性叫什么都无所谓，action也一样，叫什么无所谓，关键是class在哪里，所以不要太看重就好
    	（但是action要放在form当中，所以应该跟form当中的名字相同） -->
	<package name="convert" namespace="/convert"  extends="struts-default">
		<action name="bookConfirm" class="cn.BookAction">
			<result name="success">/showBooks.jsp</result>
		</action>
	</package>
</struts>

Book.java

package cn;

public class Book 
{
	private String title;
	private float price;
	private int amount;

	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public float getPrice() {
		return price;
	}
	public void setPrice(float price) {
		this.price = price;
	}
	public int getAmount() {
		return amount;
	}
	public void setAmount(int amount) {
		this.amount = amount;
	}
}

BookAction.java

package cn;

import java.util.Map;

import com.opensymphony.xwork2.ActionSupport;
import com.sun.net.httpserver.Authenticator.Success;

public class BookAction extends ActionSupport
{
	private Map books;
	@Override
	public String execute()throws Exception
	{
		return SUCCESS;
	}
	public Map getBooks() {
		return books;
	}
	public void setBooks(Map books) {
		this.books = books;
	}
	
		
}

addBook.jsp

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%@taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>

  </head>
  
  <body> 
    <form action="convert/bookConfirm.action" method="post" theme="simple">
		<table cellSpacing=0 cellPadding=2 width="95%" align=center border=0>
			<tr>
				<td>in书名</td>
				<td>价格</td>
				<td>数量</td>
			</tr>
			
			<s:iterator value="new int[3]" status="status">
			<tr>
			<s:set name="index" value="#status.index+1"></s:set>
			<s:set name="books" value="'books.'+'book'+#index"></s:set>
				<td><s:textfield name="%{#books+'.title'}"></s:textfield></td>
				<td><s:textfield name="%{#books+'.price'}"></s:textfield></td>
				<td><s:textfield name="%{#books+'.amount'}"></s:textfield></td>
			</tr>
			</s:iterator>
			
			<tr>	
				<td colspan="3" align="center">
					<input type="submit" value="订购图书"/>
				</td>
			</tr>
    </form>
  </body>
</html>

showBook.jsp

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%@taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>

  </head>
  
  <body> 
		<table cellSpacing=0 cellPadding=2 width="95%" align=center border=0>
			<tr>
				<td>书名</td>
				<td>价格</td>
				<td>数量</td>
			</tr>
			
			<s:iterator value="books">
			<tr>
				<td><s:property value="value.title"/></td>
				<td><s:property value="value.price"/></td>
				<td><s:property value="value.price"/></td>
			</tr>
			</s:iterator>

  </body>
</html>