《精通struts2实用教程》学习笔记-01

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开篇说明：

本系列的笔记是根据《精通struts2实用教程》而来。

好了，开始今天的《精通struts2实用教程》学习笔记-01。(因为第一章是介绍struts2的来源，并没有涉及到实际操作，故从第二章开始。)

开发工具为Eclipse (Version: Luna Release (4.4.0))

1、下载struts2

开发前，需要下载struts2: 25页中有提到下载网址：http://struts.apache.org/download.cgi#Struts206 现在的struts2版本已经到了2.3.16.3了；或者点这个直接下载

2、创建第一个简单struts工程

3、修改WEB-INFO下的web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app id="WebApp_ID" version="2.4"<span style="white-space:pre"></span>xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"<span style="white-space:pre"></span>xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"><span style="white-space:pre"></span><!-- <display-name>Struts Blank</display-name> --><span style="white-space:pre"></span><filter><span style="white-space:pre"></span><filter-name>struts2</filter-name><span style="white-space:pre"></span><filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class><span style="white-space:pre"></span></filter><span style="white-space:pre"></span><filter-mapping><span style="white-space:pre"></span><filter-name>struts2</filter-name><span style="white-space:pre"></span><url-pattern>/*</url-pattern><span style="white-space:pre"></span></filter-mapping><span style="white-space:pre"></span><welcome-file-list><span style="white-space:pre"></span><welcome-file>login.jsp</welcome-file><span style="white-space:pre"></span></welcome-file-list></web-app>

4、往lib添加jar包

5、应用到工程中。

6、创建类LoginAction

package struts2simple.login;public class LoginAction {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;}public String execute(){if (getUsername().equals("scott") && getPassword().equals("tiger")) {return "success";} else {return "error";}}}

7、在目录src中添加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><package name="struts2simple" extends="struts-default"><action name="Login" class="struts2simple.login.LoginAction"><result name="error">WEB-INF/error.jsp</result><result name="success">WEB-INF/welcome.jsp</result></action></package></struts>

8、在WebContent中添加login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>登陆</title></head><body><form action="Login.action" method="post"><table align="center"><caption><h3>用户登陆</h3></caption><tr><td>用户名:<input type="text" name="username"/></td></tr><tr><td>密码:<input type="text" name="password"/></td></tr><tr align="center"><td colspan="2"><input type="submit" value="提交"/><input type="reset" value="重填" /></td> </tr></table></form></body></html>

【有可能有错误提示 The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path 可按以下步骤解决】

9、在WEB-INF添加welcome.jsp error.jsp

welcome.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>成功页面</title></head><body>成功登陆</body></html>

error.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>错误页面</title></head><body>登陆错误</body></html>

10、运行测试：

http://localhost:8080/struts2simple/

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