From 07c951fcf404b99b640c57a3ef96d35d4d65834c Mon Sep 17 00:00:00 2001
From: AceVest <zhaoyanbai@126.com>
Date: Tue, 11 Dec 2018 18:50:34 +0800
Subject: [PATCH] add logger

---
 learn/go/logger.go | 51 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 learn/go/logger.go

diff --git a/learn/go/logger.go b/learn/go/logger.go
new file mode 100644
index 0000000..e623a7a
--- /dev/null
+++ b/learn/go/logger.go
@@ -0,0 +1,51 @@
+/*
+ * ------------------------------------------------------------------------
+ *   File Name: logger.go
+ *      Author: Zhao Yanbai
+ *              2018-12-11 16:55:07 星期二 CST
+ * Description: none
+ * ------------------------------------------------------------------------
+ */
+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+)
+
+var logger *log.Logger
+var logfile *os.File
+
+func init() {
+	logfile, err := os.OpenFile("./log.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	logger = log.New(logfile, "LogPrefix ", log.Ldate|log.Lmicroseconds|log.Lshortfile)
+	logger.Println("hello log file")
+
+	logger.SetOutput(io.MultiWriter(os.Stdout, logfile))
+	logger.Println("hello stdout & log file multi writer")
+
+	logger.SetOutput(io.Writer(logfile))
+	logger.Println("hello log file writer")
+}
+
+func TryLogger() {
+	logger.Println("test log")
+}
+
+func main() {
+	defer func() {
+		logfile.Sync()
+		logfile.Close()
+	}()
+
+	defer fmt.Println("Program Exited...")
+
+	TryLogger()
+
+}
-- 
2.44.0