Go: Yaml support for the Go language

最新推荐文章于 2024-10-24 13:32:31 发布

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最新推荐文章于 2024-10-24 13:32:31 发布

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本文介绍如何使用Go语言中的yaml.v2包来解析和序列化YAML数据。通过一个具体的代码示例展示了如何定义结构体来映射YAML数据，并演示了数据的解析与重新序列化过程。

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安装 yaml.v2
go get gopkg.in/yaml.v2
代码示例 yaml_v2.go

package main

import (
    "fmt"
    "os"

    "gopkg.in/yaml.v2"
)

var data = `
afoo: 30
bfoo: 1
cfoo: "cfoo"
dfoo:
  - "dfoo_1"
  - "dfoo_2"
eeee:
  ea: "ea"
  eb: 2
`

type Efoo struct {
    Ea  string  `yaml:"ea"`
    Eb  uint    `yaml:"eb"`
}

type Settings struct {
    Afoo    uint        `yaml:"afoo"`
    Bfoo    int         `yaml:"bfoo"`
    Cfoo    string      `yaml:"cfoo"`
    Dfoo    []string    `yaml:"dfoo"`
    Eeee    Efoo        `yaml:"eeee"`
}

func main() {
    settings := Settings{}
    err := yaml.Unmarshal([]byte(data), &settings)
    if err != nil {
        os.Exit(1)
    }
    fmt.Printf("--- Settings:\n%v\n\n", settings)

    settings.Afoo = 60
    settings.Cfoo = "CFOO"
    settings.Dfoo[0] = "DFOO_1"
    settings.Dfoo[1] = "DFOO_2"
    settings.Eeee.Ea = "EA"
    settings.Eeee.Eb = 4

    d, err := yaml.Marshal(&settings)
    if err != nil {
        os.Exit(1)
    }
    fmt.Printf("--- dump:\n%s\n\n", string(d))
}