第五章 Servlet技术基础知识课件.ppt

第五章 Servlet技术基础知识;5.1 Servlet简介 ;5.1.1 Servlet的工作原理;5.1.2 Servlet的生命周期;5.1.3 简单Servlet开发配置示例;HelloWorld.java package servlets; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class HelloWorld extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { response.setContentType(text/html); PrintWriter out = response.getWriter(); out.println(html); out.println(head); out.println(titleHello World!/title); out.println(/head); out.println(body); out.println(h1Hello World!/h1); out.println(/body); out.println(/html); } };;锭窘撞渍吩见立植坞模奢仑案辣迎邵怯签份遇鞋薄瓷阜裳拙麻敢汝兼享胎第五章 Servlet技术基础知识课件第五章 Servlet技术基础知识课件;5.1.4 使用Servlet实现MVC开发模式;视图层负责从用户获取数据和向用户展示数据，模型层负责处理业务逻辑和数据库底层操作，控制层负责处理视图和模型层的交互，控制层从视图层接受请求，然后从模型层取出对请求的处理结果，并把结果返回给视图层。在以上结构中，Servlet处于控制层，负责数据流量的控制功能。;5.2 JSP页面调用Servlet的方法;5.2.1 通过表单提交调用Servlet;;AcceptForm.java package servlets; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class AcceptForm extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { response.setContentType(text/html); response.setCharacterEncoding(gb2312); PrintWriter out = response.getWriter(); String name = request.getParameter(name); String province = request.getParameter(province); out.println(font size=2); out.print(提交的表单内容为:br); out.print(姓名: + name + br); out.print(省份: + province + br); out.print(/font); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { doGet(request, response); } };Web.xml的Servlet配置信息;5.2.2 通过超链接调用Servlet;;;;5.3 Servlet中的文件操作;5.3.1 Servlet读取文件;5.3.2 Servlet写文件;FileRead.java package servlets; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; im