Implementation of a simple MVC framework

1. Action interface

 PackageCom.togogo.webtoservice;Importjavax.servlet.http.HttpServletRequest;ImportJavax.servlet.http.HttpServletResponse; Public InterfaceAction {/*** Default method of execution *@paramRequest object for incoming processing *@paramresponse Response object for incoming processing *@returnreturns a path to a jump*/     PublicString Execute (httpservletrequest request, httpservletresponse response);}

2, Baseaction's parent class

 PackageCom.togogo.webtoservice;Importjava.lang.reflect.InvocationTargetException;ImportJava.lang.reflect.Method;Importjavax.servlet.http.HttpServletRequest;ImportJavax.servlet.http.HttpServletResponse; Public Abstract classBaseactionImplementsAction {@Override Publicstring Execute (httpservletrequest request, HttpServletResponse response) {string result=NULL; String URI=Request.getrequesturi (); StringBuilder SB=NewStringBuilder (URI); String Path= Sb.substring (Uri.lastindexof ("!") + 1, Uri.lastindexof (".")); //It is known that the method is the same as the string of the uri parameter, then there is no method that can be called directly by method name (string) method? //implementation by method name, directly invoke the method, on the class dynamic technology        Try{Method Method= This. GetClass (). Getdeclaredmethod (Path, HttpServletRequest.class, HttpServletResponse.class); Result= (String) Method.invoke ( This, request, response); } Catch(nosuchmethodexception e) {E.printstacktrace (); } Catch(SecurityException e) {E.printstacktrace (); } Catch(illegalaccessexception e) {E.printstacktrace (); } Catch(IllegalArgumentException e) {E.printstacktrace (); } Catch(InvocationTargetException e) {E.printstacktrace (); }        returnresult; }}

3. Configuration class

 PackageCom.togogo.webtoservice;ImportJava.util.HashMap;ImportJava.util.Map;ImportJava.util.ResourceBundle;/*** Path and class name image * *@authorAdministrator **/ Public classConfig {//private static map<string, string> classnames = new hashmap<string,//string> ();    /*** via key * *@paramKey *@return     */     Public Staticstring GetClassName (string key, String config) {ResourceBundle bundle=NULL; if(config = =NULL||"". Equals (config)) {Bundle= Resourcebundle.getbundle ("Action"); } Else{Bundle=resourcebundle.getbundle (config); }        returnbundle.getstring (key); }    //Static {//classnames.put ("/user", "com.togogo.action.UserAction"); //classnames.put ("/admin", "com.togogo.action.AdminAction"); // }     Public Static voidMain (string[] args) {//used to read the Properties object in the form of a classResourceBundle bundle =resourcebundle. Getbundle ("Com.togogo.webtoservice.Action"); System.out.println (Bundle.getstring ("User")); }}

4, Dispacherservlet class

 PackageCom.togogo.webtoservice;Importjava.io.IOException;ImportJavax.servlet.ServletConfig;Importjavax.servlet.ServletException;ImportJavax.servlet.http.HttpServlet;Importjavax.servlet.http.HttpServletRequest;ImportJavax.servlet.http.HttpServletResponse; Public classDispacherservletextendsHttpServlet {Private StaticString config=NULL; Private StaticString enconding= "UTF-8"; @Override Public voidInit (servletconfig config)throwsservletexception {String initconfig=config.getinitparameter ("config"); String initenconding=config.getinitparameter ("Enconding"); if(initconfig!=NULL) {Dispacherservlet.config=initconfig; }        //Web. XML configuration through the website descriptor file        if(initenconding!=NULL) {dispacherservlet.enconding=initenconding; }                Super. init (config); }    /*** Receive any request,*/@Overrideprotected voidService (HttpServletRequest request, httpservletresponse response)throwsservletexception, IOException {Try{request.setcharacterencoding (enconding);            Response.setcharacterencoding (enconding); String URI=Request.getrequesturi (); StringBuilder SB=NewStringBuilder (URI); String Path= Sb.substring (Uri.lastindexof ("/") + 1, Uri.lastindexof ("!"));            SYSTEM.OUT.PRINTLN (path); String ClassName=Config.getclassname (path,config); Action Action=actionfactory.create (className); String result=Action.execute (request, response); if(Result.contains (":") {StringBuilder ResultStr=NewStringBuilder (Result); String Repath=resultstr.substring (Result.indexof (":") +1, Result.length ()); if(Result.contains ("redirect:") {response.sendredirect (Repath); }Else if(Result.contains ("Forward:") {request.getrequestdispatcher (Repath). Forward (request, response); }                            } Else{request.getrequestdispatcher (Result). Forward (request, response); }        } Catch(Exception e) {e.printstacktrace (); }    }}

5. Action Factory class

 PackageCom.togogo.webtoservice; Public classFactory { Public StaticAction Create (String ClassName) {Action action=NULL;Try{Action=(Action) class.forname (className). newinstance ();} Catch(ClassNotFoundException e) {e.printstacktrace ();}Catch(instantiationexception e) {e.printstacktrace ();}Catch(illegalaccessexception e) {e.printstacktrace ();}returnAction;}}

6, Test Testaction class

 Packagecom.togogo.action;Importjavax.servlet.http.HttpServletRequest;ImportJavax.servlet.http.HttpServletResponse;Importcom.togogo.webtoservice.BaseAction; Public classUseractionextendsbaseaction {/*** User Login * *@paramRequest *@paramResponse *@return     */     PublicString Login (httpservletrequest request, httpservletresponse response) {System.out.println ("I'm logged in"); System.out.println ("I'm logged in------..."); return"Main.jsp"; }    /*** User Registration * *@paramRequest *@paramResponse *@return     */     PublicString Register (httpservletrequest request, httpservletresponse response) {System.out.println ("I'm registering."); return"Forward:main.jsp"; }        /*** User Registration * *@paramRequest *@paramResponse *@return     */     PublicString undo (HttpServletRequest request, httpservletresponse response) {System.out.println ("I'm undoing."); return"Redirect:main.jsp"; }}

Action.properties Mapping File

User=com.togogo.action.useraction

Web. XML configuration

<?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" 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>web_mvc_ Webtoservice</display-name> <!--This is a core controller--><servlet><servlet-name>dispacherservlet< /servlet-name><servlet-class>com.togogo.webtoservice.dispacherservlet</servlet-class>< Init-param> <param-name>config</param-name> <param-value>com.togogo.action.action</ Param-value></init-param></servlet><servlet-mapping><servlet-name>dispacherservlet </servlet-name><url-pattern>*.do</url-pattern></servlet-mapping><welcome-file-list ><welcome-file>default.jsp</welcome-file></welcome-file-list></web-app>

　　

Test page

<%@ 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" >
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Http://files.cnblogs.com/files/zhuyuejiu/web_mvc_webtoserive.zip
Implementation of a simple MVC framework