103 lines
2.5 KiB
Go
103 lines
2.5 KiB
Go
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package main
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import (
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"fmt"
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"os"
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"strings"
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"reflect"
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)
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//定义结构体
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type MysqlConfig struct {
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Address string `ini:"address"`
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Port int `ini:"port"`
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Username string `ini:"username"`
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Password string `ini:"password"`
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}
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type RedisConfig struct {
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host string `ini:"host"`
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Port int `ini:"port"`
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Password string `ini:"password"`
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Database string `ini:"database"`
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}
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type Config struct {
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RedisConfig `ini:"mysql"`
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MysqlConfig `ini:"redis"`
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}
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func Loadini(fileName string, data interface{}) (err error) {
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//0.参数的校验，对函数中修改值，必须是结构体指针
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t := reflect.TypeOf(data)
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//v := reflect.ValueOf(data)
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//校验指针类型
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if t.Kind() != reflect.Ptr {
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err = fmt.Errorf("data should be pointer")
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return
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}
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//校验结构体类型，由于是指针，要用elem方法
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if t.Elem().Kind() != reflect.Struct {
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err = fmt.Errorf("data should be struct")
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return
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}
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//1.读取文件
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b, err := os.ReadFile(fileName) //读取文件拿到字节类型的数据
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if err != nil {
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return
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}
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lineSlice := strings.Split(string(b), "\r\n") //字节类型的数据按照换行符切分
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fmt.Printf("%#v\n", lineSlice)
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//var structName string
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//2.一行一行的读取数据
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for idx, line := range lineSlice {
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//2.1如果是注释，就跳过
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line = strings.TrimSpace(line)
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if strings.HasPrefix(line, ";") || strings.HasPrefix(line, "#") {
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continue
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}
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//2.2如果是[开头的，就表示节（section）
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if strings.HasPrefix(line, "[") {
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//校验1 首尾的[]都需要存在
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if line[0] != '[' || line[len(line)-1] != ']' {
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err = fmt.Errorf("line:%d syntax error", idx+1)
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return
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}
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//结之间能取到的内容，比如redis或者mysql这个字符串
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sectionName := strings.TrimSpace(line[1 : len(line)-1])
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//校验2 []之间应该有内容
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if len(sectionName) == 0 { //切片：左包含右不包含
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err = fmt.Errorf("line:%d syntax error", idx+1)
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return
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}
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//根据字符串sectionName到data中根据反射找到结构体
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for i := 0; i < t.Elem().NumField(); i++ {
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field := t.Elem().Field(i)
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if field.Tag.Get("ini") == sectionName {
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//找到对应的嵌套结构体
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//structName = field.Name
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break
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}
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}
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} else {
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//2.3如果不是[，就是=分割的键值对
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}
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}
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return //
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}
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func main() {
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var cfg Config
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err := Loadini("./ini_unmarshal/config.ini", &cfg)
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if err != nil {
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fmt.Println("load ini error:", err)
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return
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}
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fmt.Println(cfg)
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}
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