SVN log file display time is 1970-01-01 No data----------Final Solution

This issue occurs primarily in the setup of Anon-access access permissions in the Svnserve file.

If

Anon-access = None, follow the comments in the document: Prohibit all anonymous access, that is, if the user is not open access in authz-db, is not allowed to read and write the version of the log, the system to read and write to the log also included in the forbidden scope, so when viewing the log, The occurrence date is displayed as 1970-01-01, and the log information shows no data. That's why.

So when you set access permissions in Svnserve, set it to Anon-access = read, read-only mode. In this case, the log file can be displayed as normal.