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struts2实例
开发工具：
eclipse Neon (4.6.0)
struts2.5.2
struts2.5.2是struts当前最新版本，该版本与此前2.3版本的不同之处(包含但不仅限于)：
1.struts2.5核心包已经将xwork的核心包含其中，因此在struts2版本包中的lib目录下已找不到xwork-core-xx.xx.xx.jar文件。
2.strut2.5在web.xml使用的默认过滤器已不是此前2.3版本的org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter类，而是分成了两个单独的过滤器类来配置，分别是org.apache.struts2.dispatcher.filter.StrutsPrepareFilter、org.apache.struts2.dispatcher.filter.StrutsExecuteFilter，从名称上猜测是将2.3版本中的默认过滤器拆分成了两个单独的过滤器。
struts2.5.2版本下载地址 http://mirrors.tuna.tsinghua.edu.cn/apache/struts/2.5.2/struts-2.5.2-all.zip
实例目录结构:
实例下载地址：http://pan.baidu.com/s/1slOqKNF
1.使用eclipse创建动态Web项目。
将struts2.5版本包中\apps\struts2-showcase.war包解压，将lib目录下的以下jar包复制到eclipse项目中的WebContent/WEB-INF/lib目录下：
asm-3.3.jar
asm-commons-3.3.jar
asm-tree-3.3.jar
commons-fileupload-1.3.2.jar
commons-io-2.4.jar
commons-lang3-3.4.jar
commons-logging-1.1.3.jar
freemarker-2.3.23.jar
javassist-3.20.0-GA.jar
log4j-api-2.5.jar
ognl-3.1.10.jar
struts2-core-2.5.2.jar
2.在WEB-INF目录下创建web.xml文件(若创建项目时自动创建则不再需要重新创建)，修改web.xml配置内容如下(参照struts2-showcase.war)的配置：
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> 3 <display-name>mystruts2</display-name> 4 <welcome-file-list> 5 <welcome-file>index.html</welcome-file> 6 <welcome-file>index.htm</welcome-file> 7 <welcome-file>index.jsp</welcome-file> 8 <welcome-file>default.html</welcome-file> 9 <welcome-file>default.htm</welcome-file>10 <welcome-file>default.jsp</welcome-file>11 </welcome-file-list>12 <filter>13 <filter-name>struts-prepare</filter-name>14 <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareFilter</filter-class>15 </filter>16 17 <filter>18 <filter-name>struts-execute</filter-name>19 <filter-class>org.apache.struts2.dispatcher.filter.StrutsExecuteFilter</filter-class>20 </filter>21 <filter-mapping>22 <filter-name>struts-prepare</filter-name>23 <url-pattern>/*</url-pattern>24 </filter-mapping>25 26 <filter-mapping>27 <filter-name>struts-execute</filter-name>28 <url-pattern>/*</url-pattern>29 </filter-mapping>30 </web-app>
3.在src目录下创建struts.xml，文件内容可参照struts版本包自带的struts2-showcase.war实例中的web.xml。
1 <?xml version="1.0" encoding="UTF-8" ?> 2 3 <!DOCTYPE struts PUBLIC 4 "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN" 5 "http://struts.apache.org/dtds/struts-2.5.dtd"> 6 7 <!-- START SNIPPET: xworkSample --> 8 <struts> 9 10 <package name="wei" extends="struts-default">11 12 <action name="login" class="com.info.action.LoginAction" method="execute">13 <result name="success">/WEB-INF/welcome.jsp</result>14 <result name="error">/WEB-INF/error.jsp</result>15 </action>16 17 </package>18 19 20 </struts>21 22 <!-- END SNIPPET: xworkSample -->
4.创建jsp页面。
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <%@ taglib prefix="s" uri="/struts-tags" %> 4 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 6 <html> 7 <head> 8 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 9 <title>Insert title here</title>10 </head>11 <body>12 <s:form action="login" method="post">13 <s:textfield name="username" label="用户名"></s:textfield>14 <s:password name="password" label="密码"></s:password>15 16 <s:submit value="提交"></s:submit>17 </s:form>18 </body>19 </html>
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <!-- <%@taglib prefix="s" uri="/struts-tags" %> --> 4 <%@ taglib prefix="s" uri="/struts-tags" %> 5 6 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 7 <html> 8 <head> 9 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">10 <title>welcome</title>11 </head>12 <body>13 welcome!14 </body>15 </html>
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <!-- <%@taglib prefix="s" uri="/struts-tags" %> --> 4 <%@ taglib prefix="s" uri="/struts-tags" %> 5 6 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 7 <html> 8 <head> 9 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">10 <title>error</title>11 </head>12 <body>13 error!14 </body>15 </html>
5.src目录下创建action类。
1 package com.info.action; 2 3 public class LoginAction { 4 5 private String username; 6 private String password; 7 8 public String getUsername() { 9 return username;10 }11 12 public void setUsername(String username) {13 this.username = username;14 }15 16 public String getPassword() {17 return password;18 }19 20 public void setPassword(String password) {21 this.password = password;22 }23 24 public String execute() throws Exception {25 26 if(this.getUsername().equals("admin")&&this.getPassword().equals("admin"))27 {28 return "success";29 }30 31 return "error";32 33 }34 35 }
struts2实例