Wisdom Podcast Java Pen questions

Use Java code to complete the following topic, in a log file 2013-05-30.log has the following data:

27.19.74.143--[30/may/2013:17:38:25
27.19.74.143--[30/may/2013:17:38:22
27.19.74.143--[30/may/2013:17:38:23
27.19.74.143--[30/may/2013:17:38:21
27.19.74.143--[30/may/2013:17:38:28
27.19.74.143--[30/may/2013:16:38:20
27.19.74.143--[30/may/2013:18:38:20
27.19.74.143--[30/may/2013:16:39:20
27.19.74.143--[30/may/2013:16:41:20
27.19.74.143--[30/may/2013:17:42:20
27.19.74.143--[30/may/2013:19:38:21
27.19.74.143--[31/may/2013:12:38:21
27.19.74.143--[31/may/2013:16:38:21
27.19.74.143--[31/may/2013:16:38:22
27.19.74.143--[30/may/2013:14:38:21
27.19.74.143--[30/may/2013:14:38:21

The data in the file is a piece of data that is intercepted from the Web server log, and each row contains two information:
1, the website visitor's IP
2, the time of the site visitor request

Definition: Successive requests belong to one "independent access", such as "30/may/2013:17:38:22" and "30/may/2013:17:38:25" two requests belonging to the same independent access
Two requests adjacent to time if the interval exceeds 30 minutes is considered to be two different separate accesses
Requirements: Statistics All "independent access" in the data, output the start request time of each access, end request time, and length of stay (ms)
Examples of output results:
31/may/2013:16:38:21 30/may/2013:16:41:20 181000

Wisdom Podcast Java Pen questions