java_web课件1.ppt

JavaWeb开发 第一课JavaWeb应用简介教材及主要参考书目课程目标回顾OOP&JAVA课程本章目的Web的概念HTMLURL请求-响应基本概念请求-响应基本概念请求-响应基本概念请求-响应基本概念请求-响应基本概念HTTP协议HTTP请求HTTP请求HTTP响应Servlet/JSPServlet/JSPMVC模型MVCC/SvsB/SC/SB/SJavaWeb应用的概念应用程序体系结构Web应用程序体系结构Servlet容器的概念Servlet容器响应客户请求的过程Servlet容器响应客户请求的过程安装并运行tomcat服务器启动和关闭tomcat服务器Web应用程序开发过程创建第一个JavaWeb应用目录结构说明创建web.xml文件创建index.htm文件当前结构及测试结果创建login.jsp当前结构及测试结果创建DispatcherServlet.javapackagemypack;

importjava.io.IOException;

importjavax.servlet.GenericServlet;
importjavax.servlet.RequestDispatcher;
importjavax.servlet.ServletContext;
importjavax.servlet.ServletException;
importjavax.servlet.ServletRequest;
importjavax.servlet.ServletResponse;

publicclassDispatcherServletextendsGenericServlet{

privateStringtarget=“/hello.jsp";

@Override
publicvoidservice(ServletRequestrequest,ServletResponseresponse)
throwsServletException,IOException{
//TODOAuto-generatedmethodstub

Stringusername=request.getParameter("username");

Stringpassword=request.getParameter("password");

request.setAttribute("USERNAME",username);

request.setAttribute("PASSWORD",password);

ServletContextcontext=getServletContext();
RequestDispatcherdispatcher=context.getRequestDispatcher(target);
dispatcher.forward(request,response);

}

}
编译并发布DispatcherServlet编译并发布DispatcherServlet创建hello.jsp当前结构及测试结果helloapp应用的web组件总结思考题思考题简答Q&A