log

Package log provides a simple logging interface with levels

Usage

Levels

A total of 6 levels are supported：

• TRACE
• DEBUG
• DEBUG
• INFO
• WARN
• ERROR

Methods

• Trace(args...any)
• Tracef(farmat string, args...any)
• Debug(args...any)
• Debugf(format string, args...any)
• Info(args...any)
• Infof(format string, args...any)
• Warn(args...any)
• Warnf(format string, args...any)
• Error(args...any)
• Errorf(format string, args...any)

Example

config log

// message is ignored when the output method level is lower than the specified level.
log.SetLevel(log.INFO)

// Fully compatible with standard libraries
log.SetPrefix("[utility] xxxxxx ")
log.SetOutput(os.Stdout)
log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)

use log

// init log 
log.SetLevel(log.WARN)
log.SetPrefix("TEST-PREFIX")

// message will be ignored, TRACE < log.WARN
log.Trace("This message will not be output")

// Output: TEST-PREFIX: 2024/09/19 20:24:31 main.go:13: [WARN ] Hello, world!
log.Warn("Hello, world!")

// Output: TEST-PREFIX: 2024/09/19 20:24:31 main.go:13: [WARN ] Hello, world!
log.Warn("Hello, world!")

// Output: TEST-PREFIX: 2024/09/22 20:27:46 main.go:13: [WARN ] test number: 123, test nil: <nil>
log.Warnf("test number: %d, test nil: %v", 123, nil)