html定义jsp函数吗,JSP文件中的JavaScript函数

我的JSP函数附加到我的JSP文件，但它不起作用。我得到了“sendMessage()没有定义”chatPage.jsp中的错误。请检查我的代码，并告诉我我在哪里做错了。JSP文件中的JavaScript函数

在我的loginpage.jsp中，我将获取username和roomName，它将通过UserNameServlet，然后它将getRequestDispatcher转发到chatpage.jsp，转发username和roomName的值。

这是我loginpage.jsp：

TODO supply a title

Please select a room:

Room 1

Room 2

Please Enter username

这是我UsernameServlet

@WebServlet("/UserNameServlet")

public class UserNameServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

/**

*

* @param request

* @param response

* @throws ServletException

* @throws IOException

*/

@Override

protected void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

response.setContentType("text/html");

HttpSession session = request.getSession(true);

String username = request.getParameter("username");

session.setAttribute("username", username);

String roomName = request.getParameter("roomSelect");

if("newRoomOption".equals(roomName)) roomName=request.getParameter("newRoomName");

request.setAttribute("roomName", roomName);

request.setAttribute("username", username);

request.getRequestDispatcher("chatPage.jsp").forward(request,response);

}

这是我chatPage.jsp

TODO supply a title

var websocket = new WebSocket("ws://"+document.location.host+"+"document.location.pathname+"+""chatroomServerEndpoint/"${roomName});

websocket.onmessage = function processMessage(message){

var jsonData = JSON.parse(message.data);

if(jsonData.message !== null) messagesTextArea.value += jsonData.message + "\n";

};

function sendMessage(){

alert("hello");

}

我有另一个chatRoomServerEndpoint类。

@ServerEndpoint(value="/chatroomServerEndpoint/{chatroom}", configurator=ChatroomServerConfigurator.class)

+0

你缺少的右括号''标签，它应该是：'' –