这是我的java类
public class ServerEndPointDemo
{
@OnOpen
public void handleOpen()
{
System.out.print("Connectin is created");
}
@OnMessage
public String handleMessage(String message)
{
System.out.print("message from Client = "+message);
String replyMessage = "echo"+message;
System.out.print("message send to Client = "+replyMessage);
return replyMessage;
}
@OnClose
public void handleClose()
{
System.out.print("Connectin is closed");
}
@OnError
public void handleError(Throwable e)
{
e.printStackTrace();
}
}
这是我的jsp页面
<!DOCTYPE html>
<html>
<head>
<title>WEB SOCKET 01</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
</head>
<body>
<form>
<input type="text" name="t1" id="textMessage">
<input type="button" value="SendMessage" onclick="sendMessage()" >
</form>
<textarea rows="10" cols="20" id="messagesTextArea"></textarea>
<script type="text/javascript" language="javascript">
var messagesTextArea = document.getElementById("messagesTextArea");
var textMessage = document.getElementById("textMessage");
var webSocket = new webSocket("ws://localhost:8080/WebSocketPrj01/ServerEndPointDemo");
webSocket.Onopen = function Message(){processOpen(message);};
webSocket.Onmessage = function Message(){processMessage(message);};
webSocket.Onclose = function Message(){processClose(message);};
webSocket.Onerror = function Message(){processError(message);};
function processOpen(message)
{
messagesTextArea.value +="server Connected....."+"\n";
}
function processMessage(message)
{
messagesTextArea.value +="Receive from server....."+message.data+"\n";
}
function processClose(message)
{
webSocket.send("client disconnected");
messagesTextArea.value +="server DISConnected....."+"\n";
}
function sendMessage()
{
alert("enter");
if(textMessage.value!=="close")
{
alert(textMessage.value);
webSocket.send(textMessage.value);
alert("2");
messagesTextArea.value +="send to server....."+textMessage.value()+"\n";
alert("3");
textMessage.value="";
alert("4");
}
else{
alert("else message");
webSocket.close();
}
}
function processError(message)
{
webSocket.send("client disconnected");
messagesTextArea.value +="error....."+"\n";
}
</script>
</body>
</html>
此行不起作用 webSocket.send(textMessage.value); 此外，我在检查元素时在控制台上收到此错误
TypeError: webSocket is not a constructor newjsp.jsp:25.
TypeError: webSocket is undefined
最佳答案
应该是:
var webSocket = new WebSocket("ws://localhost:8080/WebSocketPrj01/ServerEndPointDemo");
(“WebSocket”以大写字母开头)。
关于java - WebSocket 无法在聊天应用程序中工作？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22758749/