go flag参数 类似Java main 的args

两部分内容

go run test1.go aa  -name 123

1. 解析：aa   -name    123

2. 解析：name =123

代码

package main

import (
    "log"
    "os"
)

func main() {
    log.Println("main ...")

    if len(os.Args) > 0 {
       for index, arg := range os.Args {
          log.Println(index, arg)
       }
    }

    log.Println("success ..")
}
输出：
****\src> go run .\test1.go aa bb cc
2025/02/17 11:36:26 main ...
2025/02/17 11:36:26 0 C:\Users\****emp\go-build445\b001\exe\test1.exe
2025/02/17 11:36:26 1 aa
2025/02/17 11:36:26 2 bb
2025/02/17 11:36:26 3 cc
2025/02/17 11:36:26 success ..


package main

import (
    "flag"
    "log"
    "os"
)

func main() {
    log.Println("main ...")

    // 打印的是test1.go -name 1223 两个参数-name，1223
    if len(os.Args) > 0 {
       for index, arg := range os.Args {
          log.Println(index, arg)
       }
    }

    // 1. help信息
    //go run .\test1.go  -help
    // -name string
    //        help info (default "defaultValue")
    // 2. name命令  go run .\test1.go -name 1223
    // name为1223 是解析后的数据
    name := flag.String("name", "defaultValue", "help info")
    flag.Parse()
    log.Println("name:", *name)

    log.Println("success ..")
}

参考

https://www.topgoer.com/%E5%B8%B8%E7%94%A8%E6%A0%87%E5%87%86%E5%BA%93/flag.html

https://studygolang.com/pkgdoc