struts2入门程序

怼烎@ 2021-10-30 02:04 368阅读 0赞

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

![SouthEast][]

![SouthEast 1][]

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：

![SouthEast 2][]

然后运行程序

![SouthEast 3][]

输入用户名ztq和密码ztq后

![SouthEast 4][]

否则

![SouthEast 5][]

[SouthEast]: /images/20211029/e6b11188b1ef490c857f297913547c21.png
[SouthEast 1]: /images/20211029/ce1d984666ac46bf8d87b1511e7cb5c4.png
[SouthEast 2]: /images/20211029/ecea7d448ae847d29b15bd3716887e4a.png
[SouthEast 3]: /images/20211029/c2ab1b634e0d4bf2ae6f062967f4081f.png
[SouthEast 4]: /images/20211029/78457041cc5447ea98231aaabc89c16c.png
[SouthEast 5]: /images/20211029/c753cc710413434cadde69a5f72b7988.png