ps:根据版本的不断提升，使用的socket.io的版本也要对应提升。
安装nodejs，到网上在nodejs中安装必要的js，参考npm install --save express
npm install --save socket.io写服务端js，在nodejs中运行的js，运行服务端js: node app.js
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var app = require('express')();
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var http = require('http').Server(app);
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var io = require('socket.io')(http);
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io.on('connection', function(socket){
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socket.on('chat message', function(msg){
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console.log(msg);
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io.emit('chat message', msg);
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});
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});
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http.listen(3000, function(){
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console.log('listening on *:3000');
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});
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<!doctype html>
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<html>
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<head>
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<title>Socket.IO chat</title>
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<style>
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* { margin: 0; padding: 0; box-sizing: border-box; }
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body { font: 13px Helvetica, Arial; }
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form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
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form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
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form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
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#messages { list-style-type: none; margin: 0; padding: 0; }
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#messages li { padding: 5px 10px; }
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#messages li:nth-child(odd) { background: #eee; }
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</style>
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</head>
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<body>
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<ul id="messages"></ul>
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<form action="">
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<input id="m" autocomplete="off" /><button>Send</button>
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</form>
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<script src=""></script>
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<script type="text/javascript" src="jquery.noty.packaged.min.js"></script>
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<script>
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var socket = io('');
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$('form').submit(function(){
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socket.emit('chat message', $('#m').val());
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$('#m').val('');
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return false;
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});
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socket.on('chat message', function(msg){
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$('#messages').append($('
- '
).text(msg));
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generate('bottomRight', msg);
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});
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function generate(layout, msg) {
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var n = noty({
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text : msg,
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type : 'alert',
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dismissQueue: true,
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layout : layout,
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theme : 'defaultTheme'
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});
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console.log('html: ' + n.options.id);
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}
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</script>
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</body>
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</html>
java端代码,会用到
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public class SocketIoTest {
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public static void main(String[] args) throws URISyntaxException {
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final Socket socket = IO.socket("");
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socket.on(Socket.EVENT_CONNECT, new Emitter.Listener() {
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@Override
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public void call(Object... args) {
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System.out.println("EVENT_CONNECT");
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socket.emit("chat message", "hi java");
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socket.disconnect();
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}
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}).on(Socket.EVENT_ERROR, new Emitter.Listener() {
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@Override
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public void call(Object... args) {
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System.out.println("EVENT_ERROR");
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}
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}).on(Socket.EVENT_DISCONNECT, new Emitter.Listener() {
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@Override
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public void call(Object... args) {
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System.out.println("EVENT_DISCONNECT");
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}
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});
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socket.connect();
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System.out.println(socket.connected());
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}
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}
这样就可能java,html都可以发送了，如果要实现不同频道，那要用到socket.io中的namespace才能完成，暂时没用，所以不写了。
让nodejs在后台运行
npm install forever -g
forever start your_app.js
forever stop your_app.js
forever restart your_app.js
forever start -l forever.log -o out.log -e err.log your_app.js
forever list
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