struts2开发简略实例

struts2开发简单实例
struts2开发简单实例

1.引入struts2相应的jar包,可以到网上下载,大把大把的。

2.配置struts.xml 要放在src目录下如下：

 

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
	<!-- Struts 2 的Action必须放在包空间下 -->
	<package name="strutsqs" extends="struts-default">
		<!-- 定义action的名字以及action的实现类 -->
		<action name="LoginAciton" class="com.gjy.struts2.loginAction.LoginAction">
			<!-- 定义action的处理结果result,result有两个属性，其中name指定返回名称，tyle指定返回的类型 -->
			<!-- 处理Login错误时返回/error.jsp -->
                        <result name="error">/error.jsp</result>
			<!-- 处理Lognin正确时/suc.jsp -->
            		<result name="suc">/suc.jsp</result>
		</action>
	</package>	
</struts>

3.配置web.xml struts2与struts1不同，struts2是通过一系列的过滤器来组成过滤链来对用户的请求作处理
如下：

 

<?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">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <filter>
  	<filter-name>struts2</filter-name>
  	<!--定义struts2的核心Filter的实现类 -->
  	<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></web-app>

3.写Action,struts2的acction不继承其它类，是一个普通的java类，它不与serverlet API 相偶合，降低了代码的可维护性，使得代码
更加容易测试。
如下：

(1).自定义一个action接口


package com.gjy.struts2.interfaceAction;

public interface Action {
	public static String SUCCESS="suc";
	public static String ERROR="error";
	
	public String execute()throws Exception;
}

(2).写一个loginAction，实现action接口,此action的业务逻辑没有与LoginAction分开，可自行实现分开


package com.gjy.struts2.loginAction;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import com.gjy.struts2.entity.Book;
import com.gjy.struts2.interfaceAction.Action;
import com.opensymphony.xwork2.ActionContext;

public class LoginAction implements Action {
	
	private String userName;
	private String passWord;
	
	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;
	}
	
	
	//处理用护请求的execute方法
	public String execute() throws Exception
	{
	
	if (getUserName().equals("gongjiayun")
	&& getPassWord().equals("hehe") )
	{
		//通过ActionContext访问Web对象的Session对象,此处的ActionContext返回的是一个Map
		//虽然struts2的action中没有HttpSession对象,但我们也可以通过通过ActionContext访问Web对象的Session对象
		Map sessionMap = ActionContext.getContext().getSession();
		sessionMap.put("user" , getUserName());
		Book book = new Book();
		Object books[]= book.getBook();
		List<Object[]> bookList = new ArrayList<Object[]>();
		bookList.add(books);
		sessionMap.put("book", bookList);
		return SUCCESS;
	}
	else
	{
		return ERROR;
	}
	}
}

(3).写一个实体类Book

package com.gjy.struts2.entity;

public class Book {
	private static Object book[]=new Object[4];
	
	public Book(){
		book[0] = "《java编程思想》";
		book[1] = "《Struts2权威指南》";
		book[2] = "《精通Oracle》";
		book[3] = "《我的Flex我精通》";
	}
	
	public Object[] getBook(){
		return book;
	}
}

(4).写一个登陆页面login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
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>
    <base href="<%=basePath%>">
    
    <title>My JSP 'login.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    <p>用户登陆</p>
    <form action="LoginAciton.action">
    	username:<input type="text" id="userName" name="userName"/><br/><br/>
    	password:<input type="password" id="passWord" name="PassWord"/><br/><br/>
    	<input type="submit" value="submit">
    </form>
  </body>
</html>

(5).写一个显示页面suc.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c"  uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%
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>
    <base href="<%=basePath%>">
    
    <title>My JSP 'suc.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  
  <body>
    
    <center><div>
    WelCome,${sessionScope.user},you can do anything! Long Long ago,I have a dream !<br>
    <table border="1px" bordercolor="blue" id="tbColor">
	    <caption>作者gjy的图书</caption>
	    <c:forEach var="books" items="${book}" >
	    <tr >
	    	<td>书名：</td>
	    	<td>${books[0] }</td>
	    </tr>
	   <tr>
	    	<td>书名：</td>
	    	<td>${books[1] }</td>
	    </tr>
	    <tr>
	    	<td>书名：</td>
	    	<td>${books[2] }</td>
	    </tr>
	    <tr>
	    	<td>书名：</td>
	    	<td>${books[3] }</td>
	    </tr>
	    </c:forEach>
    </table>
    </div></center>
  </body>
</html>

(6).写一个error.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>
    <base href="<%=basePath%>">
    
    <title>My JSP 'suc.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    error,you can do nothing! <br>
  </body>
</html>

struts2开发简略实例

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