转自： http://ansn001.iteye.com/blog/1459277
c {
length }
lo {
length }
logger {
length }
输出日志的logger名，可有一个整形参数，功能是缩短logger名，设置为0表示只输入logger最右边点符号之后的字符串。 Conversion specifier Logger name Result
|
| %logger | mainPackage.sub.sample.Bar | mainPackage.sub.sample.Bar |
| %logger{0} | mainPackage.sub.sample.Bar | Bar |
| %logger{5} | mainPackage.sub.sample.Bar | m.s.s.Bar |
| %logger{10} | mainPackage.sub.sample.Bar | m.s.s.Bar |
| %logger{15} | mainPackage.sub.sample.Bar | m.s.sample.Bar |
| %logger{16} | mainPackage.sub.sample.Bar | m.sub.sample.Bar |
| %logger{26} | mainPackage.sub.sample.Bar | mainPackage.sub.sample.Bar |