Struts逐步學習(1)-環境搭建

1. 首先要下載struts的jar包，地址http://struts.apache.org/

2. 解壓Strusts包後，將lib文件夾裏的jar包都加入到項目中WEB-INF下的lib文件夾下

3. 在解壓後的webapps文件夾中解壓struts-blank.war，將其中的struts-config.xml拷貝到項目中（避免手寫出錯，複製粘貼，做一些配置）

<?xml version="1.0" encoding="ISO-8859-1" ?>

<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">

<struts-config>
	<form-beans>
		<form-bean name="loginForm" type="com.tgb.struts.LoginActionForm"></form-bean>
	</form-beans>
	
	<action-mappings>
		<action path="/login"
				type="com.tgb.struts.LoginAction"
				name="loginForm"
				scope="request"
				>
			<forward name="success" path="/login_success.jsp"></forward>
			<forward name="error" path="/login_error.jsp"></forward>
	
				</action>
				
	</action-mappings>

</struts-config>

4. 配置web.xml部署ActionServlet。這個格式是相對固定的，按要求配置路徑和類信息

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <display-name></display-name>	
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
  
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>2</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>2</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
  </servlet>


  <!-- Standard Action Servlet Mapping -->
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>


</web-app>

5、新建一個LoginAction類，繼承Action：

package com.tgb.struts;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

/**
 * 
 * 負責取得表單數據，調用業務邏輯，返回轉向信息
 * @author Jesse
 *
 */
public class LoginAction extends Action {
	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		
		LoginActionForm laf=(LoginActionForm)form;
		String username=laf.getUsername();
		String password=laf.getPassword();
		
		if("admin".equals(username)&& "admin".equals(password)){
			//登陸成功
			 return mapping.findForward("success");
			
		}else{
			//登錄失敗
			 return mapping.findForward("error");
		}	
	}
}

6、新建一個LoginActionForm類，繼承ActionForm：

package com.tgb.struts;

import org.apache.struts.action.ActionForm;

/**
 * 登陸ActionForm，負責表單數收集數據
 * @author Jesse
 *
 */
@SuppressWarnings("serial")
public class LoginActionForm extends ActionForm {
	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;
	}
}

7、login.Jsp頁面：

<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>
<!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=GB18030">
<title>Insert title here</title>
</head>
<body>
	<form action="login.do" method="post" >
	用戶：<input type="text" name="username"><br>
	密碼：<input type="password" name="password"><br>
	<input type="submit" value="登陸">
	
	</form>
</body>
</html>

8、success.jsp ，error.jsp頁面省略，只是一個顯示界面。

至此，一個簡單的Struts環境登陸實例就搭建起來啦。