Introduction to common log libraries in Golang

Golang commonly used log libraries include "log package", "go-logging" and "zap": 1. log package, built-in Go language, can perform basic logging and output; 2. go -logging, a powerful, flexible and easy-to-use log library that supports multiple formats of log output and level control; 3. zap, Uber’s open source high-performance log library, features structured logging and high customization.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

There are several commonly used log libraries in the Go language. I will introduce a few of them below:

1. log package:

   • The built-in log package in the Go language provides simple logging functions for basic logging and output.
   • Sample code:

   package main
   
   import (
       "log"
   )
   
   func main() {
       log.Println("这是一条普通日志")
       log.Fatalf("这是一条严重错误日志：%s", "错误信息")
   }

2. go-logging:

   • go-logging is a powerful, flexible and easy-to-use A log library that supports multiple formats of log output and level control.
   • Sample code:

   package main
   
   import (
       "github.com/op/go-logging"
       "os"
   )
   
   var log = logging.MustGetLogger("example")
   
   func main() {
       backend := logging.NewLogBackend(os.Stderr, "", 0)
       backendFormatter := logging.NewBackendFormatter(backend, logging.MustStringFormatter(`%{time:2006-01-02 15:04:05} %{level:.4s} %{message}`))
       logging.SetBackend(backendFormatter)log.Info("这是一条普通日志")
   log.Errorf("这是一条错误日志：%s", "错误信息")}

3. zap:

   • zap is Uber’s open source high-performance log library with structured logs Recording and highly customizable features.
   • Sample code:

   package main
   
   import (
       "go.uber.org/zap"
   )
   
   func main() {
       logger, _ := zap.NewProduction()
       defer logger.Sync()logger.Info("这是一条普通日志")
   logger.Error("这是一条错误日志", zap.String("err", "错误信息"))}

The above only introduces a few commonly used log libraries, and there are other log libraries worth mentioning, such as logrus, seelog etc. When choosing a log library that suits your project needs, you need to consider factors such as performance, functionality, ease of use, and community support.

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