Struts1.x 的核心源码（研究下框架怎样构成）

package com.handsome.struts; import java.io.IOException; import java.lang.reflect.Field; import java.lang.reflect.Method; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.w3c.dom.Element; import com.handsome.xmlmanager.XmlManager; public class ActionServlet extends HttpServlet { public ActionServlet() { super(); } public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void init() throws ServletException { } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ try{ //通过配置文件找到ActionForm String configFile = this.getConfigFile(); //获取请求uri String uri = this.getRequestUri( request ); Element root = XmlManager.getRoot( configFile ); Element actionElement = XmlManager.getChildElement( root, "action", "path", uri ); String formName = XmlManager.getAttribute( actionElement, "name"); Element actionFormElement = XmlManager.getChildElement( root, "form-bean", "name", formName); String className = XmlManager.getAttribute( actionFormElement, "type" ); Class formClass = Class.forName( className ); ActionForm actionForm = this.dataPackage( request, formClass ); //创建action实例 String actionTypeValue = XmlManager.getAttribute(actionElement, "type"); Action actionClass = (Action)Class.forName( actionTypeValue ).newInstance(); ActionMapping mapping = new ActionMapping( actionElement ); ActionForward af = actionClass.execute( mapping, actionForm, request, response ); String forwardUrl = af.getForwardUrl(); if( null == af || forwardUrl == null ){ return; } RequestDispatcher rd = request.getRequestDispatcher( forwardUrl ); rd.forward( request, response ); System.out.println( actionTypeValue ); }catch( Exception e){ e.printStackTrace(); } } private ActionForm dataPackage(HttpServletRequest request, Class formClass) throws Exception { ActionForm actionForm = (ActionForm)formClass.newInstance(); Field [] list = formClass.getDeclaredFields(); for( Field field : list ){ String fieldName = field.getName(); Class fieldType = field.getType(); String setterMethodName = this.createSetterMethodName( fieldName ); Method setterMethod = formClass.getMethod(setterMethodName, fieldType); String paramValue = request.getParameter( fieldName ); if( null == paramValue ){ continue; } if( fieldType.getSimpleName().equals("String")){ setterMethod.invoke( actionForm, paramValue ); }else if(fieldType.getSimpleName().equals("int")){ setterMethod.invoke( actionForm, Integer.valueOf(paramValue) ); } } return actionForm ; } private String createSetterMethodName(String fieldName) { String first = fieldName.substring(0, 1); String supperChar = first.toUpperCase(); fieldName = fieldName.replaceFirst( first, supperChar ); return "set" + fieldName; } private String getRequestUri(HttpServletRequest request) { String uri = request.getRequestURI(); String [] list = uri.split("/"); String realUri = ""; for( int i = 2; i < list.length; i++ ){ realUri = "/" + list[i]; } int end = realUri.lastIndexOf("."); realUri = realUri.substring( 0, end ); System.out.println( realUri ); return realUri; } private String getConfigFile() { // 获取Servlet的配置中名字叫config的初始化参数 String configFile = this.getInitParameter("config"); //获取路径 String path = this.getServletContext().getRealPath(""); String file = path + configFile ; //System.out.println( file ); return file; } }