CCCY

订阅一对一消息通道的疑问

1

我测试了一下前端订阅是可以不用加uid的, 比如这样 stompClient.subscribe('/user/chat', function (data) {xxx}), 然后你写的是这样的 stompClient.subscribe('/user/' + uid + '/chat', function (data) {xxx}), 虽然两者都可以实现需求, 但是后者的原理我不太清楚, 方便解释一下吗. (ps: 我参考的相关文章: [https://juejin.cn/post/6844903661231947784](https://juejin.cn/post/6844903661231947784) )

why are there no '易' language, Its file name is e.e

2

: )

失败: `COMMENT ON COLUMN "public"."xxxxx"."type" IS '类型(video视频, audio音频)';` 成功: `COMMENT ON COLUMN "public"."xxxxx"."type" IS '类型(video视频audio音频)';` 报错信息 `err happened: audio音频 java.lang.StringIndexOutOfBoundsException: begin 0, end -1, length 7 at java.base/java.lang.String.checkBoundsBeginEnd(String.java:4601) at java.base/java.lang.String.substring(String.java:2704)...