標籤：style class blog code java http
Struts 1基礎為什麼重拾Struts 1
曾經是最主流的MVC架構
市場份額依然很大
很多遺留系統中依舊使用
維護和升級都需要熟悉Struts 1
與Struts 2相比
例子：使用Struts實現登入編碼、配置繁瑣
侵入性強
登入失敗
返回登入頁面，提示失敗
登入成功
儲存當前登入使用者到Session
轉到成功頁面，顯示歡迎資訊
開發步驟：
1、添加Struts到項目添加jar包和struts-config.xml
在web.xml中配置ActionServlet
2、開發並配置ActionForm
3、開發並配置LoginAction
4、建立並編寫頁面
5、調試運行
建立web project項目：Struts1Demo
右擊項目添加struts1支援
配置struts-config.xml
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd"><!-- 在/org/apache/struts/resources/struts-config_1_3.dtd 第24行 --><struts-config><!-- Form --><form-beans ><form-bean name="userLoginForm" type="com.demo.form.LoginForm"></form-bean></form-beans><!-- Action --><action-mappings ><action name="userLoginForm" path="/login" type="com.demo.action.LoginAction" scope="request"><forward name="success" path="/success.jsp"></forward><forward name="input" path="/index.jsp"></forward></action></action-mappings></struts-config>
<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> </servlet>
建立LoginAction extends Action在com.demo.action下重寫execute方法(execute+alt+/ 選擇第二個)
@Overridepublic ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {//做登陸ActionForward af = null;LoginForm lf = (LoginForm) form;UserBiz userBiz = new UserBizImpl();if(userBiz.login(lf.getUsername(),lf.getPassword())){//登陸成功request.getSession().setAttribute("loginUser", lf.getUsername());//跳轉//mapping 是設定檔struts-config.xml的 action-mappingaf=mapping.findForward("success");}else{request.setAttribute("message", "使用者名稱密碼錯誤");af=mapping.findForward("input");}return af;}
public boolean login(String username, String password) {//直接用類比,不訪問資料庫if("admin".equals(username)&&"admin".equals(password)){return true;}elsereturn false;}
建立類LoginForm extends ActionForm 在com.demo.form下
私人屬性username,password和getter，setter方法；
重寫reset方法(execute+alt+/ 選擇第二個)
@Overridepublic void reset(ActionMapping mapping, HttpServletRequest request) {//每次提交表單的時候都會調用一次this.username=null;this.password=null;}
Index.jsp
<body> <font color="red">${message }</font> <form action="login.do" method="post"> <table> <tr> <td>使用者名稱</td> <td><input name="username"/> </td> </tr> <tr> <td>密碼：</td> <td><input name="password" type="password"/> </td> </tr> <tr> <td><input type="submit" value="登陸"/> </td> <td><input value="重設" type="reset"/> </td> </tr> </table> </form> </body>
<body> 歡迎：${loginUser }登陸！ </body>
ActionServlet
1. 由Struts提供：org.apache.struts.action.ActionServlet
2. 本身是一個Servlet，需要在web.xml中配置
Action -- Action Bean
1. 封裝某一類客戶操作，如：登入、登出
2. 需要在struts-config.xml中配置
3. 繼承自org.apache.struts.action.Action，實現execute方法
4. execute方法的參數
mapping
form
request、response
5. execute方法的返回值類型：ActionForward
ActionForm -- Form Bean
其他視圖組件：1) 封裝頁面提交的資料
2) 繼承自org.apache.struts.action.ActionForm
3) 需要在struts-config.xml中配置
4) 從頁面獲得輸入- 屬性與表單域name屬性值一致
loginForm.getUsername();
loginForm.getPassword();
JSP、JSTL、EL、自訂標籤
Struts標籤
<html:form action="login" method="post"><table><tr><td>使用者名稱</td><td><html:text property= "username" /></td></tr><tr><td>密碼：</td><td><html:password property= "password" /></td></tr><tr><td><html:submit value="登陸" /></td><td><html:reset value="重設" /></td></tr></table></html:form>
List<User> userList = userBiz.getAllUser();request.setAttribute("userList", userList);類比兩個User 在UserBizImpl
public List<User> getAllUser() {List<User> userList = new ArrayList<User>();userList.add(new User("admin", "admin", new Date(), 1));userList.add(new User("admin1", "admin1", new Date(), 0));return userList;}在success.jsp
<%@ taglib prefix="html" uri="http://struts.apache.org/tags-html" %><%@ taglib prefix="bean" uri="http://struts.apache.org/tags-bean" %><%@ taglib prefix="logic" uri="http://struts.apache.org/tags-logic" %>Body裡面：
<body> 歡迎：${loginUser }登陸！ <table border="1px" > <thead> <tr> <th>使用者名稱</th> <th>生日</th> <th>狀態</th> </tr> </thead> <tbody> <!-- 結合name和property屬性尋找JavaBean --> <logic:iterate id="u" name="userList"> <tr> <td> <!-- bean:write標籤用於輸出頁面輸出 --> <bean:write name="u" property="username"/> </td> <td> <bean:write name="u" property="birthday" format="yyyy-MM-dd"/> </td> <td> <!-- <bean:write name="u" property="status" format="#,###"/> --> <logic:equal value="1" name="u" property="status">正常</logic:equal> <logic:equal value="0" name="u" property="status">禁用</logic:equal> </td> </tr> </logic:iterate> </tbody> </table> </body>
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