统计web 访问日志的请求数据

  tomcat日志格式  在配置文件 server.xml 中，具体参照官方文档 https://tomcat.apache.org/tomcat-8.0-doc/config/valve.html#Access_Log_Valve

  

pattern

A formatting layout identifying the various information fields from the request and response to be logged, or the word common or combined to select a standard format. See below for more information on configuring this attribute.

• %a - Remote IP address
• %A - Local IP address
• %b - Bytes sent, excluding HTTP headers, or '-' if zero
• %B - Bytes sent, excluding HTTP headers
• %h - Remote host name (or IP address if enableLookups for the connector is false)
• %H - Request protocol
• %l - Remote logical username from identd (always returns '-')
• %m - Request method (GET, POST, etc.)
• %p - Local port on which this request was received. See also %{xxx}p below.
• %q - Query string (prepended with a '?' if it exists)
• %r - First line of the request (method and request URI)
• %s - HTTP status code of the response
• %S - User session ID
• %t - Date and time, in Common Log Format
• %u - Remote user that was authenticated (if any), else '-'
• %U - Requested URL path
• %v - Local server name
• %D - Time taken to process the request, in millis
• %T - Time taken to process the request, in seconds
• %F - Time taken to commit the response, in millis
• %I - Current request thread name (can compare later with stacktraces)

根据日志格式，统计