应用 logrus 和 go-file-rotatelogs 按天切割日志，源码： iris-framework
package configimport (    config "IrisFramework/config/Log"    rotatelogs "github.com/lestrrat/go-file-rotatelogs"    "github.com/rifflock/lfshook"    "github.com/sirupsen/logrus"    "os"    "path"    "time")const LogPath = "./storage/logs"const FileSuffix = ".log"var Log = logrus.New()func InitLog() {    Log.Out = os.Stdout    var loglevel logrus.Level    err := loglevel.UnmarshalText([]byte("info"))    if err != nil {        Log.Panicf("设置log级别失败：%v", err)    }    Log.SetLevel(loglevel)    NewSimpleLogger(Log, LogPath, 8)}/**  文件日志*/func NewSimpleLogger(log *logrus.Logger, logPath string, save uint) {    lfHook := lfshook.NewHook(lfshook.WriterMap{        logrus.DebugLevel: writer(logPath, "debug", save), // 为不同级别设置不同的输入目标        logrus.InfoLevel:  writer(logPath, "info", save),        logrus.WarnLevel:  writer(logPath, "warn", save),        logrus.ErrorLevel: writer(logPath, "error", save),        logrus.FatalLevel: writer(logPath, "fatal", save),        logrus.PanicLevel: writer(logPath, "panic", save),    }, &config.MineFormatter{})    log.AddHook(lfHook)}/**文件设置*/func writer(logPath string, level string, save uint) *rotatelogs.RotateLogs {    logFullPath := path.Join(logPath, level)    var cstSh, _ = time.LoadLocation("Asia/Shanghai") //上海    fileSuffix := time.Now().In(cstSh).Format("2006-01-02") + FileSuffix    logier, err := rotatelogs.New(        logFullPath+"-"+fileSuffix,        rotatelogs.WithLinkName(logFullPath),      // 生成软链，指向最新日志文件        rotatelogs.WithRotationCount(int(save)),   // 文件最大保留份数        rotatelogs.WithRotationTime(time.Hour*24), // 日志切割工夫距离    )    if err != nil {        panic(err)    }    return logier}

自定义日志输入格局

package configimport (    "fmt"    "github.com/sirupsen/logrus"    "strings"    "time")type MineFormatter struct{}const TimeFormat = "2006-01-02 15:04:05"func (s *MineFormatter) Format(entry *logrus.Entry) ([]byte, error) {    msg := fmt.Sprintf("[%s] [%s] %s\n", time.Now().Local().Format(TimeFormat), strings.ToUpper(entry.Level.String()), entry.Message)    return []byte(msg), nil}

打印输出如下：

[2020-08-05 11:34:08] [INFO] [gorm] [sql] [1.604712ms] SELECT * FROM `user`  WHERE `user`.`deleted_at` IS NULL AND ((username like ?)) []interface {}{"%风%"}