GreetingServlet.java源码：
@WebServlet("/greeting") //以@WebServlet注释开头，表示在根目录下使用/greeting来访问
public class GreetingServlet extends HttpServlet{
@Override public void doGet(HttpServletRequest request, //重写了doGet方法，实现GET HTTP方法 HttpServletResponse response) throws ServletException, IOException{
response.setContentType("text/html"); //指定响应页面的类型为html response.setBufferSize(8192); //指定缓冲区大小8192 try (PrintWriter out = response.getWriter()) { //实例化对象out,作为向html页面输出的对象 //使用println属性，向html页面输出html标签,这里输出的是： out.println("<html lang=\"en\">" + "<head><title>Servlet Hello</title></head>"); //使用println属性，向html页面输出html标签 out.println("<body bgcolor=\"#ffffff\">" + "<img src=\"resources/images/duke.waving.gif\" " + "alt=\"Duke waving his hand\">" + "<form method=\"get\">" + "<h2>Hello, my name is Duke. What‘s yours?</h2>" + "<input title=\"My name is: \" type=\"text\" " + "name=\"username\" size=\"25\"/>" + "<p></p>" + "<input type=\"submit\" value=\"Submit\"/>" + "<input type=\"reset\" value=\"Reset\"/>" + "</form>");//使用println属性，向html页面输出html标签
String username = request.getParameter("username"); //使用一个字符串username来获取，第一个input标签内的username的值 if (username != null && username.length() > 0) { RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/response"); //指定要跳转的页面相对于上下文根的URL模式为/response if (dispatcher != null) { dispatcher.include(request, response);//整合request, response然后跳转 } } out.println("</body></html>");//使用println属性，向html页面输出html标签 } }ResponseServlet.java源码：
@WebServlet("/response") //以@WebServlet注释开头，表示在根目录下使用/response来访问。
public class ResponseServlet extends HttpServlet { @Override public void doGet(HttpServletRequest request, //重写了doGet方法，实现GET HTTP方法 HttpServletResponse response) throws ServletException, IOException { try (PrintWriter out = response.getWriter()) { //实例化对象out,作为向html页面输出的对象 String username = request.getParameter("username"); //接收来自greting页面请求中的input标签中输入的username if (username != null && username.length() > 0）{out.println("<h2>Hello, " + username + "!</h2>");//使用println属性，向html页面输出html标签
} } }