表单

项目结构00x0设置首页（web.xml）<welcome-file-list><welcome-file>login.jsp</welcome-file></welcome-file-list>00x1首页表单<formaction="do_login.jsp"method="post"><div><p>账号：</p><inputtype="text"id="account"name="account"></div><div><p>密码</p><inputtype="text"id="pwd"name="pwd"></div><div><inputtype="submit"></div></form>00x2逻辑处理页（do_login.jsp）<%Stringusername=request.getParameter("account");Stringpwd=request.getParameter("pwd");if(username.equals("admin")&&pwd.equals("123")){session.setAttribute("username",username);response.sendRedirect(request.getContextPath()+"/success.jsp");}else{session.setAttribute("username",username);response.sendRedirect(request.getContextPath()+"/failure.jsp");}%>00x3登录成功页于失败同理<h1>登录成功,<%=session.getAttribute("username")%></h1>结果展示