前言
golang 踩坑，其他博客太坑了
问题
- 下载
gopkg.in/yaml.v2
go get gopkg.in/yaml.v2
- 使用
gopkg.in/yaml.v2官方提供的例子:
package main
import (
"fmt"
"log"
"gopkg.in/yaml.v2"
)
var data = `
a: Easy!
b:
c: 2
d: [3, 4]
`
// Note: struct fields must be public in order for unmarshal to
// correctly populate the data.
type T struct {
A string
B struct {
RenamedC int `yaml:"c"`
D []int `yaml:",flow"`
}
}
func main() {
t := T{}
err := yaml.Unmarshal([]byte(data), &t)
if err != nil {
log.Fatalf("error: %v", err)
}
fmt.Printf("--- t:\n%v\n\n", t)
d, err := yaml.Marshal(&t)
if err != nil {
log.Fatalf("error: %v", err)
}
fmt.Printf("--- t dump:\n%s\n\n", string(d))
m := make(map[interface{}]interface{})
err = yaml.Unmarshal([]byte(data), &m)
if err != nil {
log.Fatalf("error: %v", err)
}
fmt.Printf("--- m:\n%v\n\n", m)
d, err = yaml.Marshal(&m)
if err != nil {
log.Fatalf("error: %v", err)
}
fmt.Printf("--- m dump:\n%s\n\n", string(d))
}
均会出现问题：
go: finding module for package gopkg.in/yaml.v2
main.go:7:2: cannot find module providing package gopkg.in/yaml.v2: unrecognized import path "gopkg.in": parse https://gopkg.in/?go-get=1: no go-import meta tags ()
解决方法
查看官方文档：https://labix.org/gopkg.in
其中提到：
The actual implementation of the package is in GitHub:
https://github.com/go-yaml/yaml
因此，改用
go get github.com/go-yaml/yaml
将官方例子的 import 改为：
import (
"fmt"
"log"
"github.com/go-yaml/yaml"
)
执行成功：
--- t:
{Easy! {2 [3 4]}}
--- t dump:
a: Easy!
b:
c: 2
d: [3, 4]
--- m:
map[a:Easy! b:map[c:2 d:[3 4]]]
--- m dump:
a: Easy!
b:
c: 2
d:
- 3
- 4
