node 事件 数据连接

var events = require('events');
var eventEmitter = new events.EventEmitter();
var connectHandler = function connected(){
    console.log('链接成功！');
    eventEmitter.emit('data_received');
};
eventEmitter.on('conection',connectHandler);
eventEmitter.on('data_received',function(){
    console.log('数据接收成功！')
});
eventEmitter.emit('connection');

console.log('程序执行结束！');