Try to abstract the core package.

code/core/logger.go

@@ -0,0 +1,17 @@
+package core
+
+//日志系统必须高保
+//全局唯一的日志对象(在main函数中初始化)
+var LOGGER Logger
+
+type Logger interface {
+	//处理日志的统一方法。
+	Log(prefix string, format string, v ...interface{})
+
+	//不同级别的日志处理
+	Debug(format string, v ...interface{})
+	Info(format string, v ...interface{})
+	Warn(format string, v ...interface{})
+	Error(format string, v ...interface{})
+	Panic(format string, v ...interface{})
+}