WebSocket opening handshake timed out

wx.connectSocket({

    method: ‘GET’,

    url: ‘ws://localhost:1314’,

    header: {

    ‘content-type’: ‘application/json;charset=UTF-8’

    }

});

wx.onSocketOpen(function (res) {

    console.log(‘WebSocket连接已打开！’)

})

后面的onSocketOpen回调函数 一直无法触发，过几分钟报错

WebSocket connection to ‘ws://localhost:1314/’ failed: WebSocket opening handshake timed out

后台ServerSocket是用java写的，显示已经连接上了。

求解，这个问题怎么解决