golang日志

golang程序日志记录 package main import ( "flag" "fmt" "log" "os" "runtime" ) var ( logFileName = flag.String("log", "cServer.log", "Log file name") ) func main() { runtime.GOMAXPROCS(runtime.NumCPU()) flag.Parse() //set logfile Stdout logFile, logErr := os.OpenFile(*logFileName, os.O_CREATE|os.O_RDWR|os.O_APPEND, 0666) if logErr != nil { fmt.Println("Fail to find", *logFile, "cServer start Failed") os.Exit(1) } log.SetOutput(logFile) log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile) //write log log.Printf("Server abort! Cause:%v \n", "test log file") } 说明： 一、在主程序启动之前初始化log的格式后，以后用log.xxx