尚学堂科技王勇讲Struts1.docx

1、尚学堂科技王勇讲Struts1Struts多层架构及MVC领域模型_模式_框架简介Sturts+Hibernate+SpringStruts是一个MVC框架Hibernate是做持久层的（DRP中dao这块就不要了sql语句就不怎么写了）Spring提供一些基础性的服务，我们在DRP中，对象的管理，事物。几个概念：Domain Model（领域模型），DDD（领域驱动设计），例如：银行领域模型 （是一个核心）领域模型从角色上分有五个：实体、值对象、工厂、仓储、服务。平行模型：只有状态没有行为，Pattern（模式）Framework（框架）多层框架概述我们的目标是：能够熟练运用当前流行的jav

2、a开源框架：Struts、Hibernate以及Spring来构建灵活、易于扩展的多层Web应用程序。C/S：以数据库为中心B/S：多层架构才是真正的目的B/S：多层架构将显示、业务运算、数据库等功能完全分离，杜绝彼此的耦合与影响，从而实现松耦合（解耦合）和良好的可维护性。呈现层（UI Layer/Presentation Layer）Struts业务逻辑层（Business Layer）Spring持久化层（Persistence Layer）hibernateStruts深入理解MVC模式掌握Struts体系架构掌握Struts开发流程熟练掌握Struts的配置方法从Servlet说开去什

3、么是Servlet？如何编写Servlet？如何映射Servlet？相对路径与绝对路径的基本概念如何基于Servlet编程？JavaBeans JavaBean是一种java类 JavaBean必须是具体的和公共的，并且具备无参构造器 JavaBean通过提供符合一致性设计模式的公共方法将内部域暴露称为属性 JavaBean提供两种方法来访问Bean的内部状态： 访问器（getters）用来读JavaBenan状态-以小写get前缀开始，后跟属性名，属性名的第一个字母必须大写，返回值必须匹配相应修改器的方法的参数；如果访问器返回boolean值，则使用is前缀开始，后跟属性名，属性名第一个字母

4、必须大写。 修改器（setters）用来修改JavaBean状态，以小写set前缀开始，后跟属性名，属性名的第一个字线必须大写，修改器的返回值通常为void。Servlet的简单使用Index.jsp请求页面 b.jsp请求到TestServlet.java中import java.io.IOException;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;

5、import javax.servlet.http.HttpServletResponse;public class TestServlet extends HttpServlet private static final long serialVersionUID = 1L; protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException /取得表单数据 String username = request.getParam

6、eter(username); UserManager userManager = new UserManager(); List userList = userManager.findUserByName(username); request.setAttribute(userlist, userList); /转向到c.jsp，取出list中的数据 request.getRequestDispatcher(/a/b/c/c.jsp).forward(request, response); return; 根据表单数据从UserManager.java中获取数据import java.uti

7、l.ArrayList;import java.util.List;public class UserManager public List findUserByName(String name) List userList = new ArrayList(); userList.add(数据一); userList.add(数据二); return userList; 在web.xml中配置servlet信息 TestServlet com.bjsxt.servlet.TestServlet TestServlet /servlet/testServlet 转发到c.jsp中获取信息 请求说

8、明MVCMVC框架它分两种：一种是面向请求驱动的（Struts1.x,Struts2.x,WebWork）；一种是面向事件驱动的（JSF）。MVC实现原理简单MVC模式小例子搭建完后的格式index.jsp发送请求页面 测试Servlet error.jsp请求失败页面数据出错！seccess.jsp请求成功页面 % List userList = (List)request.getAttribute(userlist); out.println(userList); %Web.xml配置文件 test_servlet2 index.html index.htm index.jsp defau

9、lt.html default.htm default.jsp TestServlet com.bjsxt.servlet.TestServlet TestServlet *.do action_config.xml配置文件 Action.java接口Actionpackage com.bjsxt.servlet.action;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public interface Action public String servic

10、e(HttpServletRequest request, HttpServletResponse response);AddUserAction.java实现Action接口的添加类package com.bjsxt.servlet.action;import java.util.List;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.bjsxt.servlet.UserManager;public class AddUserActio

11、n implements Action Override public String service(HttpServletRequest request, HttpServletResponse response) /取得表单数据 String username = request.getParameter(username); UserManager userManager = new UserManager(); List userList = userManager.addUser(username); request.setAttribute(userlist, userList);

12、 return /seccess.jsp; ModifyUserAction.java实现Action接口的修改类package com.bjsxt.servlet.action;import java.util.List;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.bjsxt.servlet.UserManager;public class ModifyUserAction implements Action Override pub

13、lic String service(HttpServletRequest request, HttpServletResponse response) /取得表单数据 String username = request.getParameter(username); UserManager userManager = new UserManager(); List userList = userManager.modifyUser(username); request.setAttribute(userlist, userList); return /seccess.jsp; QueryUs

14、erAction.java实现Action接口的查询类package com.bjsxt.servlet.action;import java.util.List;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.bjsxt.servlet.UserManager;public class QueryUserAction implements Action Override public String service(HttpServletR

15、equest request, HttpServletResponse response) /取得表单数据 String username = request.getParameter(username); UserManager userManager = new UserManager(); List userList = userManager.findUserByName(username); request.setAttribute(userlist, userList); return /seccess.jsp; UserManameger.java根据页面信息取得数据packag

16、e com.bjsxt.servlet;import java.util.ArrayList;import java.util.List;public class UserManager /添加用户 public List addUser(String name) List userList = new ArrayList(); userList.add(添加数据一); userList.add(添加数据二); return userList; /查找用户 public List findUserByName(String name) List userList = new ArrayList

17、(); userList.add(查找数据一); userList.add(查找数据二); return userList; /修改用户 public List modifyUser(String name) List userList = new ArrayList(); userList.add(修改数据一); userList.add(修改数据二); return userList; TestXML.java取得配置文件action_config.xml文件package com.bjsxt.servlet;import java.io.IOException;import javax.

18、xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.parsers.ParserConfigurationException;import org.w3c.dom.Document;import org.w3c.dom.Element;import org.w3c.dom.NodeList;import org.xml.sax.SAXException;public class TestXML public static String getStr(String

19、 uiPath) Class c = TestXML.class; String filename = c.getResource().getPath().toString(); filename = filename.substring(0, filename.indexOf(classes)+classes.length()+1)+action_config.xml; String strClass = ; Document document = null; DocumentBuilderFactory factory = DocumentBuilderFactory.newInstanc

20、e(); DocumentBuilder builder; try builder = factory.newDocumentBuilder(); document = builder.parse(filename); catch (ParserConfigurationException e) e.printStackTrace(); catch (SAXException e) e.printStackTrace(); catch (IOException e) e.printStackTrace(); NodeList list = document.getElementsByTagNa

21、me(action); for(int i=0;ilist.getLength();i+) Element tag = (Element) list.item(i); String path = tag.getAttribute(path); if(uiPath.equals(path) strClass = tag.getAttribute(class); return strClass; TestServlet.java总体进分发及转向package com.bjsxt.servlet;import java.io.IOException;import java.lang.reflect.

22、InvocationTargetException;import java.lang.reflect.Method;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class TestServlet extends HttpServlet private static final long serialVersionUID = 1L; protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException String forwardPath = /error.jsp; String currentURI = request.getRequestURI(); / System.out.println(currentURI+currentURI);