Question

我正在尝试运行websocket示例。

我的客户端代码就是这个

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"    
"http://www.w3.org/TR/html4/loose.dtd">
 <html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>Web Socket Implementation</title>
</head>
<body>
    <form>
        <input id="textmessage" type="text">
        <input onclick="sendmessage();" value="Send Message" type="button">
    </form>
<br><textarea id="messageTextArea" rows="10" cols="50"></textarea>
    <script type="text/javascript">

    var webSocket=new   
            WebSocket("ws://localhost:8080/SimpleWebSocketProj1/serverendpoindemo");
    var messageTextArea=document.getElementById("messageTextArea");
    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)
    {
        messageTextArea.value +="Server Connect.." + "\n";
    }

    function onmessage(message)
    {
        messageTextArea.value +="Receive from server..-->" + message.data   
                    +"\n";
    }

    function sendmessage()
    {   if(textmessage.vaue!="close")
            {
            webSocket.send(tesxtmessage.value);
            messageTextArea.value +="Send to server..-->" +    
                            textmessage.value +"\n";
            tesxtmessage.value="";
            }
        else 
            webSocket.close();
    }

    function processClose(message)
    {   
        webSocket.send("Client disconnceted..");
        messageTextArea.value +="Server Disconnect.." + "\n";
    }
    function processError(message)
    {
        messageTextArea.value +="Error while Connect..\n";
    }
    </script>
</body>
</html>

这是我的服务器java代码

package com.ws.test;

import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.server.ServerEndpoint;

@ServerEndpoint("/serverendpoindemo")
public class ServerEndpoinDemo 
{   @OnOpen
public void handleOpen()
{
    System.out.println("client is now connected..");
}
@OnMessage
public String handleMessage(String message)
{
    System.out.println("receive from client.." +message);
    String replymessage="echo " +message; 
    System.out.println("send to client.." +replymessage);
    return replymessage;

}
@OnClose
public void handleClose()
{
    System.out.println("client is now disconnected..");
}
@OnError
public void handleError(Throwable t)
{
    t.printStackTrace();
}

}

当我尝试在服务器上运行时，它会显示如下错误 Eclipse插件无法与GlassFish服务器通信，状态为：CREDENTIAL_ERROR

Answer 1

也许安装glassfish有问题，请确保你的glassfish中有正确的文件路径和eclipse中正确的JDK。当您创建一个新的动态Web项目时，请转到：target runtime＆gt; glassfish 4并传递glassfish服务器目录：C：.. \ glassfish4 \ glassfish 然后在同一个屏幕中添加JDK而不是JRE，文件位置为：C：.. \ Java \ jdk1.7.0_51。如果您没有JDK下载它。点击完成，它应该工作。

Glassfish服务器在启动时显示错误

1 个答案: