实验二、Servlet的创建、部署与运行

实验二： Servlet的创建、部署与运行一、 实验目的1. 掌握Servlet创建与配置方法；2. 掌握Servlet分析客户请求的方法；3. 掌握Servlet处理表单数据的方法；4. 掌握Web应用程序部署到Tomcat上的方法；二、 实验内容2.1 SimpleServlet1. 打开MyEclipse, 创建一个Web Project，命名为ServletTest，过程参见视频 simpleServlet.avi(1) 其中SimpleServlet.java的doGet方法源代码如下： /** * The doGet method of the servlet.
* * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println(""); out.println(""); out.println(" "); out.println(" "); out.println("

Hello, I'm a simple servlet!

"); out.println(" "); out.println(""); out.flush(); out.close(); }(2) 运行http://localhost:8080/ServletTest/servlet/SimpleServlet2.2 HeadersServlet1. 在ServletTest项目中，新建一Servlet，命名为HeadersServlet，参见视频HeadersServlet.rmvb：(1) 其doPost方法代码如下： /** * The doPost method of the servlet.
* * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println(""); out.println(""); out.println(" "); out.println(" "); out.println(""); out.println("List of all Headers in Servlet Request"); out.println(""); out.println(""); out.println("

---

"); out.println("

Request Line is:

"); out.println("METHOD: " + request.getMethod() + "
"); out.println("URI:" + request.getRequestURI() + "
"); out.println("PROTOCOL:" + request.getProtocol() + "
"); out.println("

Header Name and Values

"); out.println(""); out.println(""); Enumeration headerNames = request.getHeaderNames(); while (headerNames.hasMoreElements()) { String headerName = (String) headerNames.nextElement(); out.println(""); out.println(""); } out.println("

Name	Value
" + headerName + "	" + request.getHeader(headerName) + "

"); out.println(" "); out.println(""); out.flush(); out.close(); }(2) 运行http://localhost:8080/ServletTest/servlet/HeadersServlet2.3 FormParameterServlet参见视频：FormParameterServlet.rmvb1. 在ServletTest项目的WebRoot下，新建一html文件FormParameter.html，代码如下：
This example shows you how the form parameters are handled by servlet. Please enter information and click the submit button to see results.

 

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2. 新建名为FormParameterServlet的Servlet, 其doPost方法代码摘录如下： /** * The doPost method of the servlet.
* * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println(""); out.println(""); out.println(" "); out.println(" "); out.println(""); out.println("List of all Parameters Sent from the Browser"); out.println(""); out.println("

---

"); out.println("Parameter Lists:
"); out.println(""); out.println(""); Enumeration params = request.getParameterNames(); while (params.hasMoreElements()) { String p = (String) params.nextElement(); String [] paramArr = request.getParameterValues(p); boolean first = true; String val = ""; for (int i = 0; i < paramArr.length; i ++) { if (!first) { val = val + ", "; } else { first = false; } val = val + paramArr[i]; } out.println(""); } out.println("

Name	Value
" + p + "	" + val + "

"); out.println("

---

"); out.println(" "); out.println(""); out.flush(); out.close(); }3. 运行(1) 输入http://localhost:8080/ServletTest/FormParameter.html，输入信息后点击 Submit按钮，查看结果2.4 RequestCounterServlet请参照教材第60页的“程序例4-4”，完成RequestCounterServlet代码。

通过该例理解Servlet的生命周期。