httpSession详解

public class Regist1Servlet extends HttpServlet {

 

       public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

              //获得性别

              String gender = ("gender");

              //获得职位

              String job = ("job");

             

              //根据request获得session, 如果session已存在就直接使用当前会话的session，如果不存在就创建新的session对象

              HttpSession session = ();

              //从session中获得用户和密码,返回的是Object需要强转为String类型

              String username = (String)("username");

              String password = (String) ("password");

              //获得session的id，session利用id和浏览器的cookie进行绑定用来区分会话

              String sessionID = ();

              (sessionID);

              switch(gender){

                     case "1" :

                            gender="男";

                            break;

                     case "2" :

                            gender="女";

                            break;

              }

             

              switch(job){

                     case "1" :

                            job="讲师";

                            break;

                     case "2" :

                            job="构架师";

                            break;

              }

              //设置response的类型和编码

              ("UTF-8");

              ("text/html;charset=UTF-8");

              //打印到页面上

              ().println("<h1>注册成功</h1>");

              ().println("<hr>");

              ().println("用户名："+username+"<br>");

              ().println("密码："+password+"<br>");

              ().println("性别："+gender+"<br>");

              ().println("职位："+job+"<br>");

       }

}