tomcat日志文件格式

在server.xml文件里配置  我们的系统配置如下
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="localhost_access_log." suffix=".txt" pattern="%h %l %u %t %r %s %b %D" resolveHosts="false"/>
其中：pattern="%h %l %u %t %r %s %b %D" 为我们配置的日志输出格式。

或patten="common" 

或patten=""combined 

common的值：%h %l %u %t %r %s %b
 combined的值：%h %l %u %t %r %s %b %{Referer}i %{User-Agent}i
prefix="localhost_access_log."：为日志文件名前准。

%a – 远程主机的IP (Remote IP address) 
%A – 本机IP (Local IP address) 
%b – 发送字节数，不包含HTTP头，0字节则显示 ‘-’ (Bytes sent, excluding HTTP headers, or ‘-’ if no bytes
were sent) 
%B – 发送字节数，不包含HTTP头 (Bytes sent, excluding HTTP headers) 
%h – 远程主机名 (Remote host name) 
%H – 请求的具体协议，HTTP/1.0 或 HTTP/1.1 (Request protocol) 
%l – 远程用户名，始终为 ‘-’ (Remote logical username from identd (always returns ‘-’)) 
%m – 请求方式，GET, POST, PUT (Request method) 
%p – 本机端口 (Local port) 
%q – 查询串 (Query string (prepended with a ‘?’ if it exists, otherwise
an empty string) 
%r – HTTP请求中的第一行 (First line of the request) 
%s – HTTP状态码 (HTTP status code of the response) 
%S – 用户会话ID (User session ID) 
%t – 访问日期和时间 (Date and time, in Common Log Format format) 
%u – 已经验证的远程用户 (Remote user that was authenticated 
%U – 请求的URL路径 (Requested URL path) 
%v – 本地服务器名 (Local server name) 
%D – 处理请求所耗费的毫秒数 (Time taken to process the request, in millis) 
%T – 处理请求所耗费的秒数 (Time taken to process the request, in seconds) 
输出格式例如
10.200.7.116 - - [23/Feb/2011:17:25:13 +0800] GET /search/gettotalnum.do HTTP/1.1 200 137 1