Struts1學(xué)習(xí)筆記總結(jié).doc

Struts1Struts11Struts1和Servlet的關(guān)系1創(chuàng)建第一個(gè)Struts1項(xiàng)目1例子1:3總結(jié)重點(diǎn)：struts1的工作流程（基于MVC模式的）7一普通的Servlet的工作流程7二Structs1的工作流程（和上面的對(duì)比記憶）8Struts標(biāo)簽9Bean標(biāo)簽9html標(biāo)簽10logic標(biāo)簽（邏輯標(biāo)記）12i18n（國(guó)際化）13Struts1Struts1和Servlet的關(guān)系實(shí)體 - VOJsp+Javabean業(yè)務(wù)邏輯-daoJsp+Servlet+Javabean接收數(shù)據(jù)ActionForm跳轉(zhuǎn)ActionForward控制ActionServletActionForm和VO的區(qū)別：一樣的內(nèi)容，不一樣的作用ActionForm只接收前臺(tái)表單傳來的數(shù)據(jù)VO是conga后臺(tái)提取的數(shù)據(jù)向前臺(tái)傳遞創(chuàng)建第一個(gè)Struts1項(xiàng)目新建一個(gè)web項(xiàng)目，選擇1.4即可右鍵-MyEclipse-Add Struts Capacity-Struts控制文件的路徑TLD（標(biāo)簽）1）2）:顯示信息3）:邏輯標(biāo)簽struts-config.xml 擔(dān)任Controller的是ActionServlet，所有的客戶端請(qǐng)求都通過它來完成轉(zhuǎn)發(fā)，必須在web.xml中配置： 注意：1）設(shè)定config參數(shù)的作用是設(shè)定struts-config.xml（包括了所有的Struts的相關(guān)請(qǐng)求轉(zhuǎn)發(fā)及一些資源設(shè)定）的文檔來源2）Servlet-mapping將所有以*.do結(jié)尾的請(qǐng)求將給ActionServlet來處理例子1:1) index.jsp 用戶名：密碼： 2) struts-config.xml3) UserFormpublic class UserForm extends ActionFormprivate String username;private String pwd;public String getUsername() return username;public void setUsername(String username) this.username = username;public String getPwd() return pwd;public void setPwd(String pwd) this.pwd = pwd;4) UserActionpublic class UserAction extends Action public ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception /1.得到表單中方的數(shù)據(jù)UserForm userform = (UserForm) form;String username = userform.getUsername();String pwd = userform.getPwd();/2.往后臺(tái)傳數(shù)據(jù)System.out.println(username+=+pwd);boolean flag = UserDao.getInstance().findByUser(username, pwd);if(flag)return mapping.findForward(success);elsereturn mapping.findForward(error);5) UserDao/單例模式public class UserDao private static UserDao instance = new UserDao();private UserDao()public static UserDao getInstance()return instance;public boolean findByUser(String username,String pwd)return false;6）連接數(shù)據(jù)庫(kù)（DBConnection 和UserDao）public boolean findByUser(String username,String pwd)boolean flag = false;DBConnection db = new DBConnection();String sql = select username,password from users where username=? and password=?;try Connection conn = db.connection();PreparedStatement pst = conn.prepareStatement(sql);pst.setString(1, username);pst.setString(2, pwd);ResultSet rs = pst.executeQuery();if(rs.next()flag = true; catch (SQLException e) / TODO Auto-generated catch blocke.printStackTrace();return flag;7）獲取信息：在頁(yè)面上可以使用EL表達(dá)式8）在UserForm中新加入兩種方法：/和表單中按鈕的作用是一樣的public void reset(ActionMapping mapping, HttpServletRequest request) System.out.println(reset);/驗(yàn)證框架public ActionErrors validate(ActionMapping mapping,HttpServletRequest request) System.out.println(驗(yàn)證框架);return super.validate(mapping, request);順序：先清空，再放值，再驗(yàn)證9）動(dòng)態(tài)獲取表單的數(shù)據(jù)struts-config.xml將原來的form-bean去掉將UserAction改為：public class UserAction extends Action public ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception /1.得到表單中方的數(shù)據(jù)DynaActionForm userForm = (DynaActionForm) form;System.out.println(userForm.get(username)+*+userForm.get(pwd);String username = (String) userForm.get(username);String pwd = (String) userForm.get(pwd);/2.往后臺(tái)傳數(shù)據(jù)boolean flag = UserDao.getInstance().findByUser(username, pwd);if(flag)request.setAttribute(username, username);return mapping.findForward(success);elsereturn mapping.findForward(error);總結(jié)重點(diǎn)：struts1的工作流程（基于MVC模式的）一普通的Servlet的工作流程1.web客戶端發(fā)送一個(gè)request到tomcat2.tomcat接受請(qǐng)求，3.new HttpServletRequest對(duì)象4.new HttpServletResponse 對(duì)象5.發(fā)送doGet/doPost到相應(yīng)的servlet6.servlet截取到相應(yīng)的URL7.根據(jù)URL找到相應(yīng)（文件/數(shù)據(jù)）8.調(diào)用相應(yīng)的業(yè)務(wù)邏輯就是調(diào)用相應(yīng)的Dao9.對(duì)數(shù)據(jù)的操作10.返回給Dao一個(gè)結(jié)果11.將Dao返回的結(jié)果返回到相應(yīng)的servlet12.servlet會(huì)根據(jù)返回的結(jié)果找到跳轉(zhuǎn)的頁(yè)面13.在tomcat會(huì)根據(jù)結(jié)果生成頁(yè)面14.將頁(yè)面返回給web客戶端二Structs1的工作流程（和上面的對(duì)比記憶）Web客戶端ActionServlet1.requestStruts-config.xml文件Action業(yè)務(wù)邏輯控制器Model 業(yè)務(wù)邏輯Jsp1 web客戶端發(fā)送一個(gè)request到tomcat2 tomcat接受請(qǐng)求3 new HttpServletRequest對(duì)象4 new HttpServletResponse對(duì)象5 發(fā)送doGet/doPodt方法到相應(yīng)的ActionServlet6 ActionServlet會(huì)讀取struts-config.xml文件7 截取url信息8 根據(jù)url的配置信息，取得數(shù)據(jù)（從struts中的Action標(biāo)簽的內(nèi)容放到ActionMapping當(dāng)中）9 New ActionForm對(duì)象（作用：會(huì)收集表單數(shù)據(jù)，進(jìn)行存?。?0 ActionServlet會(huì)取得表單數(shù)據(jù)11 New Action12 會(huì)執(zhí)行Actiion中的execute（ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response）13 從ActionForm中取得數(shù)據(jù)14 調(diào)用相應(yīng)的模型層15 返回?cái)?shù)據(jù)搭配Action16 通過ActionForward返回到ActionServlet17 通過forward到視圖層（jsp）生成jsp18 返回response到web客戶端Struts標(biāo)簽Bean標(biāo)簽標(biāo)簽頭在哪找到：struts包下的打開即寫成1） BeanActionpublic class BeanAction extends Actionpublic ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception request.setAttribute(hello, 測(cè)試一下);request.setAttribute(hello1, 測(cè)試一下);return mapping.findForward(show);2） struts-config.xml3） success.jsp 結(jié)果：其他標(biāo)簽：復(fù)制標(biāo)記顯示Bean屬性標(biāo)記 標(biāo)記 注意：filter為true是不支持html代碼html標(biāo)簽（只要是html就可以改成struts1的代碼）和相同說明：生成的結(jié)果取決于Struts應(yīng)用程序所位于的服務(wù)器的locale。如果你將應(yīng)用程序部署到一個(gè)不同locale的服務(wù)器，你不需要改變代碼，Locale會(huì)自動(dòng)調(diào)整 User Name: Password: 說明：html:form 相當(dāng)于form html:text 相當(dāng)于 html:submit 相當(dāng)于提交按鈕 focus 是光標(biāo)1） BeanActionpublic class BeanAction extends Actionpublic ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception UserForm user = (UserForm) form;user.setUsername(堂吉訶德);user.setPwd(123);request.setAttribute(user,user );return mapping.findForward(show);2） struts-config.xml3） success.jsp 用戶名：密 碼： 結(jié)果：其他標(biāo)簽：標(biāo)記 ：（property: 元素名稱 ；size: 顯示的字?jǐn)?shù) ；value: 元素初值 ；redisplay: 是否顯示ActionForm的值）標(biāo)記標(biāo)記 標(biāo)記 標(biāo)記 標(biāo)記標(biāo)記標(biāo)記 標(biāo)記 標(biāo)簽 ：（forward屬性：鏈接到一個(gè)global forward上；action屬性：鏈接到一個(gè)action mapping上；href屬性：這個(gè)鏈接會(huì)轉(zhuǎn)發(fā)給控制器，由控制器做決定；page屬性：一個(gè)相對(duì)的鏈接）標(biāo)簽 標(biāo)記 logic標(biāo)簽（邏輯標(biāo)記）1） BeanActionpublic class BeanAction extends Actionpublic ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception request.setAttribute(hello,null);List list = new ArrayList();request.setAttribute(list, list);String str = ;request.setAttribute(str, str);return mapping.findForward(show);2） success.jsp為空不為空為空不為空為空不為空結(jié)果：關(guān)于取出list內(nèi)容的標(biāo)簽用法1） BeanActionpublic class BeanAction extends Actionpublic ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception List list = new ArrayList();for(int i=0;i=10;i+)UserForm user = new UserForm();user.setUsername(username+i);user.setPwd(pwd+i);list.add(user);request.setAttribute(list, list);