开发大型项目时需要正确主动关闭websocket，同时根据异常关闭正确的执行重连
| 关闭状态码 | 简称 | 原因 |
|---|---|---|
| 1000 | 正常关闭 | 连接成功地完成了创建它的目的。 |
| 1001 | 离开 | 端点消失了，可能是因为服务器故障，也可能是因为浏览器离开了打开连接的页面。 |
| 1002 | 协议错误 | 由于协议错误，端点正在终止连接。 |
| 1003 | 不支持的数据 | 由于端点接收到的数据类型无法接受，连接被终止。(例如，纯文本端点接收二进制数据 |
| 1004 | 暂时保留 | 保留。将来可能会定义一个含义。 |
| 1005 | No Status Rcvd | Reserved. Indicates that no status code was provided even though one was expected. |
| 1006 | Abnormal Closure | Reserved. Indicates that a connection was closed abnormally (that is, with no close frame being sent) when a status code is expected. |
| 1007 | Invalid frame payload data | The endpoint is terminating the connection because a message was received that contained inconsistent data (e.g., non-UTF-8 data within a text message). |
| 1008 | Policy Violation | The endpoint is terminating the connection because it received a message that violates its policy. This is a generic status code, used when codes 1003 and 1009 are not suitable. |
| 1009 | Message Too Big | The endpoint is terminating the connection because a data frame was received that is too large. |
| 1010 | Mandatory Ext. | The client is terminating the connection because it expected the server to negotiate one or more extension, but the server didn’t. |
| 1011 | Internal Error | The server is terminating the connection because it encountered an unexpected condition that prevented it from fulfilling the request. |
| 1012 | Service Restart | The server is terminating the connection because it is restarting. |
| 1013 | Try Again Later | The server is terminating the connection due to a temporary condition, e.g. it is overloaded and is casting off some of its clients. |
| 1014 | Bad Gateway | The server was acting as a gateway or proxy and received an invalid response from the upstream server. This is similar to 502 HTTP Status Code. |
| 1015 | TLS handshake | Reserved. Indicates that the connection was closed due to a failure to perform a TLS handshake (e.g., the server certificate can’t be verified). |
| 1016–2999 | For definition by future revisions of the WebSocket Protocol specification, and for definition by extension specifications. | |
| 3000–3999 | For use by libraries, frameworks, and applications. These status codes are registered directly with IANA. The interpretation of these codes is undefined by the WebSocket protocol. | |
| 4000–4999 | For private use, and thus can’t be registered. Such codes can be used by prior agreements between WebSocket applications. The interpretation of these codes is undefined by the WebSocket protocol. |
后面的不想翻译，请读者自行翻译，帮你贴一个翻译传送门
WebSocket.onclose = (event) => {
console.log(event.code);
};
@Override
public void onClosed(WebSocket webSocket, int code, String reason) {
super.onClosed(webSocket, code, reason);
// todo 根据状态码执行重连
if(code != 1000){
}
}
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