hello2

网络模块，采用JavaServlet技术的hello2

在源代码中的应用_tut-install_/examples/web/servlet/hello2/目录。

这个servlet也覆盖doGet方法，则仅显示响应。下面节选了adventureworks中的@WebServlet注释，其指定了图案相对于上下文根：

@WebServlet("/response")
public class ResponseServlet extends HttpServlet {

    @Override
    public void doGet(HttpServletRequest request,
            HttpServletResponse response)
            throws ServletException, IOException {
        try (PrintWriter out = response.getWriter()) {

            // then write the data of the response
            String username = request.getParameter("username");
            if (username != null && username.length()> 0) {
                out.println("<h2>Hello, " + username + "!</h2>");
            }
        }
    }

参考hello