Java 如何使用 JEE7 Websockets 将参数传递给 @OnOpen 方法，
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/21559260/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
how do I pass a parameter to the @OnOpen method with JEE7 Websockets,
提问by Leo
I have this code
我有这个代码
@ServerEndpoint(value = "/websocket")
public class Service {
private String clientId;
@OnOpen
public void init(Session session) throws IOException {
//opening a websocket
// get clientId
clientId = // Code here to get initialization parameter.
}
}
How do I get initialization parameters from the client opening the socket?.
如何从打开套接字的客户端获取初始化参数？。
采纳答案by Pavel Bucek
Depends what do you mean by initialisation parameter. You can do something like this:
取决于你所说的初始化参数是什么意思。你可以这样做：
@ServerEndpoint(value = "/websocket/{clientId}")
public class Service {
private volatile String clientId;
@OnOpen
public void init(@PathParam("clientId") String clientId, Session session) throws IOException {
this.clientId = clientId;
}
}
Then you have do use following URL to access your endpoint: ws://host/contextPath/websocket/[clientId].
然后您必须使用以下 URL 来访问您的端点：ws://host/contextPath/websocket/[clientId]。
if you use query parameters, please see Session#getQueryString().
如果您使用查询参数，请参阅Session#getQueryString()。
