應用JavaWeb webSocket完成簡略單純的點對點聊天功效實例代碼。本站提示廣大學習愛好者：（應用JavaWeb webSocket完成簡略單純的點對點聊天功效實例代碼）文章只能為提供參考，不一定能成為您想要的結果。以下是應用JavaWeb webSocket完成簡略單純的點對點聊天功效實例代碼正文
起首給年夜門風明一點：須要 jdk 7 ， tomcat須要支撐websocket的版本
1.InitServlet
該類重要是用來初始化結構未來存儲用戶身份信息的map倉庫，應用其初始化辦法Init 初始化倉庫， 應用其靜態辦法getSocketList 取得對應的用戶身份信息。
webSocket ，我以為MessageInbound 用來辨認登錄人的信息，用它來找到對應的人，推送新聞。每次登錄都邑發生一個MessageInbound。
這裡的 HashMap<String,MessageInbound> ：string 存儲用戶session的登錄id,MessageInbound存儲 推送須要的身份信息。以上屬於小我行動話懂得。
package socket;
import java.nio.CharBuffer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import org.apache.catalina.websocket.MessageInbound;
public class InitServlet extends HttpServlet {
private static final long serialVersionUID = -L;
//private static List<MessageInbound> socketList;
private static HashMap<String,MessageInbound> socketList;
public void init(ServletConfig config) throws ServletException {
// InitServlet.socketList = new ArrayList<MessageInbound>();
InitServlet.socketList = new HashMap<String,MessageInbound>();
super.init(config);
System.out.println("Server start============");
}
public static HashMap<String,MessageInbound> getSocketList() {
return InitServlet.socketList;
}
/* public static List<MessageInbound> getSocketList() {
return InitServlet.socketList;
}
*/}
2.MyWebSocketServlet
websocket用來樹立銜接的servlet，樹立銜接時，起首在session獲得該登錄人的userId，在挪用MyMessageInbound結構函數傳入userId
package socket;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.CharBuffer;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.websocket.StreamInbound;
import org.apache.catalina.websocket.WebSocketServlet;
/**
*
* @ClassName: MyWebSocketServlet
* @Description: 樹立銜接時創建
* @author mangues
* @date --
*/
public class MyWebSocketServlet extends WebSocketServlet {
public String getUser(HttpServletRequest request){
String userName = (String) request.getSession().getAttribute("user");
if(userName==null){
return null;
}
return userName;
// return (String) request.getAttribute("user");
}
@Override
protected StreamInbound createWebSocketInbound(String arg,
HttpServletRequest request) {
System.out.println("##########");
return new MyMessageInbound(this.getUser(request));
}
}
3.onOpen辦法挪用InitServlet的map身份倉庫，
放入用戶userId 和 對應當登錄用戶的websocket身份信息MessageInbound （可以用userId來尋覓到推送須要的 身份MessageInbound ）
onTextMessage ：用來獲得新聞，並發送新聞
package socket;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.util.HashMap;
import org.apache.catalina.websocket.MessageInbound;
import org.apache.catalina.websocket.WsOutbound;
import util.MessageUtil;
public class MyMessageInbound extends MessageInbound {
private String name;
public MyMessageInbound() {
super();
}
public MyMessageInbound(String name) {
super();
this.name = name;
}
@Override
protected void onBinaryMessage(ByteBuffer arg) throws IOException {
// TODO Auto-generated method stub
}
@Override
protected void onTextMessage(CharBuffer msg) throws IOException {
//用戶所發新聞處置後的map
HashMap<String,String> messageMap = MessageUtil.getMessage(msg); //處置新聞類
//上線用戶聚集類map
HashMap<String, MessageInbound> userMsgMap = InitServlet.getSocketList();
String fromName = messageMap.get("fromName"); //新聞來自人 的userId
String toName = messageMap.get("toName"); //新聞發往人的 userId
//獲得該用戶
MessageInbound messageInbound = userMsgMap.get(toName); //在倉庫中掏出發往人的MessageInbound
if(messageInbound!=null){ //假如發往人 存在停止操作
WsOutbound outbound = messageInbound.getWsOutbound();
String content = messageMap.get("content"); //獲得新聞內容
String msgContentString = fromName + " " + content; //結構發送的新聞
//收回去內容
CharBuffer toMsg = CharBuffer.wrap(msgContentString.toCharArray());
outbound.writeTextMessage(toMsg); //
outbound.flush();
}
/* for (MessageInbound messageInbound : InitServlet.getSocketList()) {
CharBuffer buffer = CharBuffer.wrap(msg);
WsOutbound outbound = messageInbound.getWsOutbound();
outbound.writeTextMessage(buffer);
outbound.flush();
} */
}
@Override
protected void onClose(int status) {
InitServlet.getSocketList().remove(this);
super.onClose(status);
}
@Override
protected void onOpen(WsOutbound outbound) {
super.onOpen(outbound);
//登錄的用戶注冊出來
if(name!=null){
InitServlet.getSocketList().put(name, this);
}
// InitServlet.getSocketList().add(this);
}
}
4.新聞處置類，處置前端發來的新聞
package util;
import java.nio.CharBuffer;
import java.util.HashMap;
/**
*
* @ClassName: MessageUtil
* @Description: 新聞處置類
* @author mangues
* @date --
*/
public class MessageUtil {
public static HashMap<String,String> getMessage(CharBuffer msg) {
HashMap<String,String> map = new HashMap<String,String>();
String msgString = msg.toString();
String m[] = msgString.split(",");
map.put("fromName", m[]);
map.put("toName", m[]);
map.put("content", m[]);
return map;
}
}
5.web設置裝備擺設
<?xml version="1.0" encoding="UTF-8"?> <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> <servlet> <servlet-name>mywebsocket</servlet-name> <servlet-class>socket.MyWebSocketServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>mywebsocket</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <servlet> <servlet-name>initServlet</servlet-name> <servlet-class>socket.InitServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
6,前端，為便利起見，我直接用了兩個jsp，在個中用<%session.setAttribute("user","小明")%>；來表現登錄。
兩個jsp沒任何實質差異，只是用來表現兩個分歧的人登錄，可以同兩個閱讀器翻開分歧的jsp，來聊天操作
A.小化
<%@ page language="java" contentType="text/html; charset=UTF-"
pageEncoding="UTF-"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-">
<title>Index</title>
<script type="text/javascript" src="js/jquery ...min.js"></script>
<%session.setAttribute("user", "小化");%>
<script type="text/javascript">
var ws = null;
function startWebSocket() {
if ('WebSocket' in window)
ws = new WebSocket("ws://localhost:/webSocket/mywebsocket.do");
else if ('MozWebSocket' in window)
ws = new MozWebSocket("ws://localhost:/webSocket/mywebsocket.do");
else
alert("not support");
ws.onmessage = function(evt) {
//alert(evt.data);
console.log(evt);
$("#xiaoxi").val(evt.data);
};
ws.onclose = function(evt) {
//alert("close");
document.getElementById('denglu').innerHTML="離線";
};
ws.onopen = function(evt) {
//alert("open");
document.getElementById('denglu').innerHTML="在線";
document.getElementById('userName').innerHTML='小化';
};
}
function sendMsg() {
var fromName = "小化";
var toName = document.getElementById('name').value; //發給誰
var content = document.getElementById('writeMsg').value; //發送內容
ws.send(fromName+","+toName+","+content);
}
</script>
</head>
<body onload="startWebSocket();">
<p>聊天功效完成</p>
登錄狀況：
<span id="denglu" >正在登錄</span>
<br>
登錄人：
<span id="userName"></span>
<br>
<br>
<br>
發送給誰：<input type="text" id="name" value="小明"></input>
<br>
發送內容：<input type="text" id="writeMsg"></input>
<br>
聊天框：<textarea rows="" cols="" readonly id="xiaoxi"></textarea>
<br>
<input type="button" value="send" onclick="sendMsg()"></input>
</body>
</html>
B.小明
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Index</title>
<script type="text/javascript" src="js/jquery 2.1.1.min.js"></script>
<%session.setAttribute("user", "小明");%>
<script type="text/javascript">
var ws = null;
function startWebSocket() {
if ('WebSocket' in window)
ws = new WebSocket("ws://localhost:8080/webSocket/mywebsocket.do");
else if ('MozWebSocket' in window)
ws = new MozWebSocket("ws://localhost:8080/webSocket/mywebsocket.do");
else
alert("not support");
ws.onmessage = function(evt) {
console.log(evt);
//alert(evt.data);
$("#xiaoxi").val(evt.data);
};
ws.onclose = function(evt) {
//alert("close");
document.getElementById('denglu').innerHTML="離線";
};
ws.onopen = function(evt) {
//alert("open");
document.getElementById('denglu').innerHTML="在線";
document.getElementById('userName').innerHTML="小明";
};
}
function sendMsg() {
var fromName = "小明";
var toName = document.getElementById('name').value; //發給誰
var content = document.getElementById('writeMsg').value; //發送內容
ws.send(fromName+","+toName+","+content);
}
</script>
</head>
<body onload="startWebSocket();">
<p>聊天功效完成</p>
登錄狀況：
<span id="denglu" >正在登錄</span>
<br>
登錄人：
<span id="userName"></span>
<br>
<br>
<br>
發送給誰：<input type="text" id="name" value="小化"></input>
<br>
發送內容：<input type="text" id="writeMsg"></input>
<br>
聊天框：<textarea rows="13" cols="100" readonly id="xiaoxi"></textarea>
<br>
<input type="button" value="send" onclick="sendMsg()"></input>
</body>
</html>
以上所述是小編給年夜家引見的應用JavaWeb webSocket完成簡略單純的點對點聊天功效實例代碼的相干常識，願望對年夜家有所贊助，假如年夜家有任何疑問請給我留言，小編會實時答復年夜家的。在此也異常感激年夜家對網站的支撐！
