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WebContent\WEB-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：