enhance(log):改进日志的滚动保存配置。

logger/rolling.go

@@ -1,11 +1,9 @@
 package logger
 
 import (
-	"fmt"
 	"io"
 	"log"
 	"os"
-	"time"
 
 	"gopkg.in/natefinch/lumberjack.v2"
 )
@@ -16,12 +14,10 @@ func newRollingWriter() io.Writer {
 		return nil
 	}
 
-	now := time.Now()
-
 	return &lumberjack.Logger{
-		Filename:   fmt.Sprintf("log/%04d-%02d-%02d.log", now.Year(), now.Month(), now.Day()),
+		Filename:   "log/electricity_bill_service.log",
-		MaxBackups: 0,   // files
+		MaxBackups: 366 * 10, // files
 		MaxSize:    200,      // megabytes
-		MaxAge:     0,   // days
+		MaxAge:     366 * 10, // days
 	}
 }