修改默认系统消息

1. 编辑 IMArchiveDisplay.jsp。

2. 在 IMArchiveDisplay.jsp 中搜索以下代码行：

   .... ht.put("has_joined_the_room","<span class='user'> {0} </span> <span class='headervalue'> has joined the room.</span>"); ....

3. 以所需的文本替换 headervalue。

   例如：

   .... ht.put("has_joined_the_room","<span class='user'> {0} </span> <span class='headervalue'> has entered the room.</span>"); ....