-->org.apache.struts.action.ActionServlet 所以本質上ActionServlet是一個普通的servlet，負責處理.do為后綴的Http請求. servlet在執行doGet(),doPost(),之前先調用init(), 以下我們先分析一下init()方法 /** * Initialize this servlet. Most of the processing has been factored into * support methods so that you can override particular functionality at a * fairly granular level.
* servlet初始化操作,注重初始化順序 * @exception ServletException if we cannot configure ourselves correctly */ public void init() throws ServletException { //注重初始化的順序 //Initialize our internal MessageResources bundle initInternal(); //Initialize other global characteristics of the controller servlet //處理一些全局變量的設置如：debug，detail等 initOther(); //Initialize the servlet mapping under which our controller servlet //is being accessed. This will be used in the &Html:form> //tag to generate correct destination URLs for form submissions //主要是注冊DTD文件以及解析web.xml關于ActionServlet的配置。如后綴名等. // Configure the processing rules that we need // digester.addCallMethod("web-app/servlet-mapping", // "addServletMapping", 2); // digester.addCallParam("web-app/servlet-mapping/servlet-name", 0); // digester.addCallParam("web-app/servlet-mapping/url-pattern", 1); //initServlet()的上面一段將把Struts默認的后綴名從web.xml中解析得到 //也就是web.xml中的如下配置： // //action //*.do //默認以.do結尾的請求都將由Struts來處理，你可以自己修改 // initServlet();
