首先安裝解析的第三方包:
go get gopkg.in/yaml.v2
示例:
package main
import (
"os"
"log"
"fmt"
"encoding/json"
"gopkg.in/yaml.v2"
)
type Config struct {
Test Test `yaml:"test"`
}
type Test struct {
User []string `yaml:"user"`
MQTT MQ `yaml:"mqtt"`
Http HTTP `yaml:"http"`
}
type HTTP struct {
Port string `yaml:"port"`
Host string `yaml:"host"`
}
type MQ struct {
Host string `yaml:"host"`
Username string `yaml:"username"`
Password string `yaml:"password"`
}
//read yaml config
//注:path為yaml或yml文件的路徑
func ReadYamlConfig(path string) (*Config,error){
conf := Config{}
if f, err := os.Open(path); err != nil {
return nil,err
} else {
yaml.NewDecoder(f).Decode(conf)
}
return conf,nil
}
//test yaml
func main() {
conf,err := ReadYamlConfig("D:/test_yaml/test.yaml")
if err != nil {
log.Fatal(err)
}
byts,err := json.Marshal(conf)
if err != nil {
log.Fatal(err)
}
fmt.Println(string(byts))
}
test.yaml內(nèi)容如下:
test:
user:
- Tom
- Lily
- Skay
mqtt:
host: localhost:1883
username: test
password: test
http: {port: "8080", host: "127.0.0.1"}
運(yùn)行結(jié)果:
{"Test":{"User":["Tom","Lily","Skay"],"MQTT":{"Host":"localhost:1883","Username":"test","Password":"test"},"Http":{"Port":"8080","Host":"127.0.0.1"}}}
補(bǔ)充:golang 讀取yml格式,多結(jié)構(gòu)體級聯(lián)
1.安裝yml解析包
進(jìn)入到gopath下執(zhí)行命令
go get gopkg.in/yaml.v2
源碼地址https://github.com/go-yaml/yaml
2.設(shè)置配置文件config.yml
ipport: 192.168.2.95:10000
startsendtime: 2017-01-02 08:08:08
sendmaxcountperday: 100
devices:
- devid: 123456789
nodes:
- pkid: 0
bkid: 0
index: 0
minvalue: 0
maxvalue: 60
datatype: normal
- pkid: 0
bkid: 0
index: 0
datatype: boolean
- devid: 10001
nodes:
- pkid: 0
bkid: 1
index: 0
datatype: boolean
warnfrequency: 10
sendfrequency: 10
3.編寫測試類
package main
import (
"fmt"
"gopkg.in/yaml.v2"
"io/ioutil"
)
//配置文件中字母要小寫,結(jié)構(gòu)體屬性首字母要大寫
type Myconf struct {
Ipport string
StartSendTime string
SendMaxCountPerDay int
Devices []Device
WarnFrequency int
SendFrequency int
}
type Device struct {
DevId string
Nodes []Node
}
type Node struct {
PkId string
BkId string
Index string
MinValue float32
MaxValue float32
DataType string
}
func main() {
data, _ := ioutil.ReadFile("config.yml")
fmt.Println(string(data))
t := Myconf{}
//把yaml形式的字符串解析成struct類型
yaml.Unmarshal(data, t)
fmt.Println("初始數(shù)據(jù)", t)
if(t.Ipport==""){
fmt.Println("配置文件設(shè)置錯(cuò)誤")
return;
}
d, _ := yaml.Marshal(t)
fmt.Println("看看 :", string(d))
}
4.注意
1.配置文件中字母要小寫,結(jié)構(gòu)體屬性首字母要大寫,開發(fā)比較快
也可以指定如:yaml:"c",只不過有點(diǎn)麻煩,當(dāng)然如果重命名必須要指定
2.yaml:",flow"
這個(gè)意思是將數(shù)組用[“a”,”b”]這樣的格式展示,默認(rèn)展示形式是
- a
- b
以上為個(gè)人經(jīng)驗(yàn),希望能給大家一個(gè)參考,也希望大家多多支持腳本之家。如有錯(cuò)誤或未考慮完全的地方,望不吝賜教。
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