golangzap包使用

zap是Uber开源的高性能log包。

1 package main
2
3 import (
4 "encoding/json"
5 "fmt"
6
7 "github.com/natefinch/lumberjack"
8 "go.uber.org/zap"
9 "go.uber.org/zap/zapcore"
10 )
11
12 // logpath 日志文件路径
13 // loglevel 日志级别
14 func initLogger(logpath string, loglevel string) *zap.Logger {
15
16 hook := lumberjack.Logger{
17 Filename: logpath, // 日志文件路径
18 MaxSize: 128, // megabytes
19 MaxBackups: 30, // 最多保留300个备份
20 MaxAge: 7, // days
21 Compress: true, // 是否压缩 disabled by default
22 }
23
24 w := zapcore.AddSync(&hook)
25
26 // 设置日志级别,debug可以打印出info,debug,warn；info级别可以打印warn，info；warn只能打印warn
27 // debug->info->warn->error
28 var level zapcore.Level
29 switch loglevel {
30 case "debug":
31 level = zap.DebugLevel
32 case "info":
33 level = zap.InfoLevel
34 case "error":
35 level = zap.ErrorLevel
36 default:
37 level = zap.InfoLevel
38 }
39 encoderConfig := zap.NewProductionEncoderConfig()
40 // 时间格式
41 encoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
42 core := zapcore.NewCore(
43 zapcore.NewConsoleEncoder(encoderConfig),
44 w,
45 level,
46 )
47
48 logger := zap.New(core)
49 logger.Info("DefaultLogger init success")
50
51 return logger
52 }
53
54 type Test struct {
55 Name string `json:"name"`
56 Age int `json:"age"`
57 }
58
59 func main() {
60 t := &Test{
61 Name: "xiaoming",
62 Age: 12,
63 }
64 data, err := json.Marshal(t)
65 if err != nil {
66 fmt.Println("marshal is failed,err: ", err)
67 }
68
69 // 历史记录日志名字为：all-2018-11-15T07-45-51.763.log，服务重新启动，日志会追加，不会删除
70 logger := initLogger("./all.log", "debug")
71 for i := 0; i <6; i++ {
72 logger.Info(fmt.Sprint("test log ", i), zap.Int("line", 47))
73 logger.Debug(fmt.Sprint("debug log ", i), zap.ByteString("level", data))
74 logger.Info(fmt.Sprint("Info log ", i), zap.String("level", `{"a":"4","b":"5"}`))
75 logger.Warn(fmt.Sprint("Info log ", i), zap.String("level", `{"a":"7","b":"8"}`))
76 }
77
78 }

all.log内容

2018-11-15T16:19:30.269+0800 info DefaultLogger init success
2018-11-15T16:19:30.289+0800 info test log 0 {"line": 47}
2018-11-15T16:19:30.289+0800 info Info log 0 {"level": "{\"a\":\"4\",\"b\":\"5\"}"}
2018-11-15T16:19:30.289+0800 warn Info log 0 {"level": "{\"a\":\"7\",\"b\":\"8\"}"}
2018-11-15T16:19:30.289+0800 info test log 1 {"line": 47}
2018-11-15T16:19:30.289+0800 info Info log 1 {"level": "{\"a\":\"4\",\"b\":\"5\"}"}
2018-11-15T16:19:30.289+0800 warn Info log 1 {"level": "{\"a\":\"7\",\"b\":\"8\"}"}
2018-11-15T16:19:30.289+0800 info test log 2 {"line": 47}
2018-11-15T16:19:30.289+0800 info Info log 2 {"level": "{\"a\":\"4\",\"b\":\"5\"}"}
2018-11-15T16:19:30.289+0800 warn Info log 2 {"level": "{\"a\":\"7\",\"b\":\"8\"}"}
2018-11-15T16:19:30.289+0800 info test log 3 {"line": 47}
2018-11-15T16:19:30.289+0800 info Info log 3 {"level": "{\"a\":\"4\",\"b\":\"5\"}"}
2018-11-15T16:19:30.289+0800 warn Info log 3 {"level": "{\"a\":\"7\",\"b\":\"8\"}"}
2018-11-15T16:19:30.289+0800 info test log 4 {"line": 47}
2018-11-15T16:19:30.289+0800 info Info log 4 {"level": "{\"a\":\"4\",\"b\":\"5\"}"}
2018-11-15T16:19:30.289+0800 warn Info log 4 {"level": "{\"a\":\"7\",\"b\":\"8\"}"}
2018-11-15T16:19:30.289+0800 info test log 5 {"line": 47}
2018-11-15T16:19:30.289+0800 info Info log 5 {"level": "{\"a\":\"4\",\"b\":\"5\"}"}
2018-11-15T16:19:30.289+0800 warn Info log 5 {"level": "{\"a\":\"7\",\"b\":\"8\"}"}