struts2入门程序
1、示例
搭建编程环境就先不说了，这里假设已经搭建好了编程环境，并且下好了strut2的jar包，接下来程序。
1.1 新建web项目
点击File->New->Dynamic Web Project
填写项目名称，一路Next，最后Finish，然后一个项目就建成了。
1.2 导入jar包，将下载的strut2文件夹下lib文件夹中的这5个jar拷贝到WEB-INF下的lib文件夹下
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
commons-lang-2.5.jar
freemarker-2.3.18.jar
javassist-3.11.0.GA.jar
ognl-3.0.4.jar
struts2-core-2.3.1.2.jar
xwork-core-2.3.1.2.jar
1.3 创建java类，先在scr包下创建一个com包，然后再在com包下创建一个java类
package com;
import com.opensymphony.xwork2.ActionSupport;
public class LoginAction extends ActionSupport{
/**
*
*/
private static final long serialVersionUID = 1L;
String usrName;
String passWord;
String Msg;
public String usrLogin() throws Exception{
if ( "ztq".equals(usrName) && "ztq".equals(passWord)){
Msg = "欢迎成功，欢迎"+usrName;
return SUCCESS;
}else{
Msg = "用户名或密码错误，请重新输入！";
return ERROR;
}
}
public String getUsrName() {
return usrName;
}
public void setUsrName(String usrName) {
this.usrName = usrName;
}
public String getPassWord() {
return passWord;
}
public void setPassWord(String passWord) {
this.passWord = passWord;
}
public String getMsg() {
return Msg;
}
public void setMsg(String msg) {
Msg = msg;
}
}
1.4 在WebContent目录下新建文件夹pages，再在pages下面新建三个jsp页面（Index.jsp、Error.jsp、Success.jsp）
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!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>Index Page</title>
</head>
<body>
<s:form action="ztq/login.do">
<label>用户名：</label><input id=usrName name=usrName tabindex="1"/>
<br/>
<label>密码：</label><input id=passWord name=passWord type="password" tabindex="2"/>
<br/>
<input type="submit" value="登陆"/>
</s:form>
</body>
</html>
<%@ 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>Error</title>
</head>
<body>
${Msg}
</body>
</html>
<%@ 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>Welcome</title>
</head>
<body>
${Msg}
</body>
</html>
1.5 在src包下新建配置struts.xml文件
<?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>
<constant name="struts.i18n.encoding" value="UTF-8"/>
<constant name="struts.action.extension" value="action,do"></constant>
<package name="ztq" namespace="/ztq" extends="struts-default">
<action name="login" class="com.LoginAction" method="usrLogin">
<result name="success">/pages/Success.jsp</result>
<result name="error">/pages/Error.jsp</result>
</action>
</package>
</struts>
1.6 在WebContentWEB-INF目录下新建配置web.xml文件
<?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>SSH</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>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>/pages/Index.jsp</welcome-file>
</welcome-file-list>
</web-app>
最后如下图：
然后运行程序
输入用户名ztq和密码ztq后
否则
