总结：

 其他类型转json   

func Marshal(v interface{}) ([]byte, error) 

 json 转其他类型  

func Unmarshal(data []byte, v interface{}) error

 

 

• 结构体生成json 

/*  1、结构体转json   json.Marshal*/package mainimport (    "encoding/json"    "fmt")type IT struct {    Company  string   `json:"-"`        // 不解析    Subjects []string `json:"subjects"` //小写    Isok     bool     `json:",string"`  // 转nstring    Price    float64  `json:",string"`  //转nsstring}func main() {    it := IT{
   "itcast", []string{
   "go", "c++", "test"}, true, 990.232}    //    buf, error := json.Marshal(it)    buf, error := json.MarshalIndent(it, "", "") //格式化    if error != nil {        fmt.Println("email====yes", error)        return    } else {        json := string(buf)        fmt.Println(json) //        /*            {            "subjects": [            "go",            "c++",            "test"            ],            "Isok": "true",            "Price": "990.232"            }        */    }}

•  map转json

/*  1、map转json   json.Marshal*/package mainimport (    "encoding/json"    "fmt")type IT struct {    Company  string    Subjects []string    Isok     bool    Price    float64}func main() {    // 创建map    m := make(map[string]interface{}, 4)    m["company"] = "google"    m["subjects"] = []string{
   "go", "c++", "test"}    m["price"] = 888.88    m["isok"] = true    buf, error := json.Marshal(m)    if error != nil {        fmt.Println("email====yes", error)        return    } else {        json := string(buf)        fmt.Println(json)        //{"Company":"google","Isok":true,"Price":888.88,"Subjects":["go","c++","test"]}    }}

• json转结构体

/*  1、json 转结构体     json.Unmarshal([]byte(jsonBuf), &it)*/package mainimport (    "encoding/json"    "fmt")type IT struct {    Company  string    Subjects []string    Isok     bool    Price    float64}func main() {    jsonBuf := `    {    "company": "itcast",    "subjects": [        "Go",        "C++",        "Python",        "Test"    ],    "isok": true,    "price": 666.666    }`    var it IT    json.Unmarshal([]byte(jsonBuf), &it)    fmt.Println(it) //{itcast [Go C++ Python Test] true 666.666}}

• 解析到map
• /*  1、json 转map     json.Unmarshal([]byte(jsonBuf), &it)*/package mainimport (    "encoding/json"    "fmt")func main() {    jsonBuf := `    {    "company": "itcast",    "subjects": [        "Go",        "C++",        "Python",        "Test"    ],    "isok": true,    "price": 666.666    }`    var mapResult map[string]interface{}    json.Unmarshal([]byte(jsonBuf), &mapResult)    fmt.Printf("m====%+v\n", mapResult)    //map[subjects:[Go C++ Python Test] isok:true price:666.666 company:itcast]    for key, value := range mapResult {        //        fmt.Printf("%v ===========%v\n", key, value)        switch data := value.(type) {        case string:            fmt.Printf("map[%s] =====string=====%s\n", key, data)        case bool:            fmt.Printf("map[%s] ======bool====%t\n", key, data)        case float64:            fmt.Printf("map[%s] ======float64====%f\n", key, data)        case []interface{}:            fmt.Printf("map[%s] ======[]interface{}====%s\n", key, data)        }    }}