go chapter 2

func main() {
data, err := ioutil.ReadFile("D:/test/widua.go")
    if err != nil {
    fmt.Println("read error")
        os.Exit(1)
    }
    fmt.Println(string(data))
}

　　

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config/app.yaml

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

package main

import (
    "fmt"
    "gopkg.in/yaml.v2"
    "io/ioutil"
)

//配置文件中字母要小写，结构体属性首字母要大写

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类型   配置文件中字母要小写，结构体属性首字母要大写
    yaml.Unmarshal(data, &t)
    fmt.Println("初始数据", t)
    if(t.Ipport==""){
        fmt.Println("配置文件设置错误")
        return;
    }
    d, _ := yaml.Marshal(&t)
    fmt.Println("看看 :", string(d))
}