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golang 标准库json Marshal 序列化与反序列化

news 2025/8/4 12:58:04

标准库代码

func Marshal(v any) ([]byte, error) {e := newEncodeState()defer encodeStatePool.Put(e)err := e.marshal(v, encOpts{escapeHTML: true})if err != nil {return nil, err}buf := append([]byte(nil), e.Bytes()...)return buf, nil
}func Unmarshal(data []byte, v any) error {// Check for well-formedness.// Avoids filling out half a data structure// before discovering a JSON syntax error.var d decodeStateerr := checkValid(data, &d.scan)if err != nil {return err}d.init(data)return d.unmarshal(v)
}

一、单个值序列化与反序列化

	aaaa := 321aa2, err := json.Marshal(aaaa)//序列化if err != nil {fmt.Printf("err: %v\n", err)}fmt.Printf("aa2: %v\n", aa2) //aa2: [51 50 49]var a1 interr = json.Unmarshal(aa2, &a1) //反序列化fmt.Printf("a1: %v %[1]T\n", a1) //a1: 321 int

二、结构体

package mainimport ("encoding/json""fmt"
)type Strcut1 struct {Name  stringAge   intHight int
}func main() {//一、结构体序列化与反序列化sperson := []Strcut1{ //person结构类型的切片{"aa", 3, 54},{"aa", 2, 54},{"aa", 6, 54},{"aa", 3, 52},{"aa", 12, 15},}//序列化sp1, err := json.Marshal(sperson)if err != nil {fmt.Printf("err: %v\n", err)}fmt.Printf("sp1: %T %[1]s %[1]v\n", sp1) //[]uint8 [{"Name":"aa","Age":3,"Hight":54},{"Name":"aa","Age":2,"Hight":54},{"Name":"aa","Age":6,"Hight":54},{"Name":"aa","Age":3,"Hight":52},{"Name":"aa","Age":12,"Hight":15}] [91 123 34 78 97 109 101 34 58 34 97 97 34 44 34 65 103 101 34 58 51 44 34 72 105 103 104 116 34 58 53 52 125 44 123 34 78 97 109 101 34 58 34 97 97 34 44 34 65 103 101 34 58 50 44 34 72 105 103 104 116 34 58 53 52 125 44 123 34 78 97 109 101 34 58 34 97 97 34 44 34 65 103 101 34 58 54 44 34 72 105 103 104 116 34 58 53 52 125 44 123 34 78 97 109 101 34 58 34 97 97 34 44 34 65 103 101 34 58 51 44 34 72 105 103 104 116 34 58 53 50 125 44 123 34 78 97 109 101 34 58 34 97 97 34 44 34 65 103 101 34 58 49 50 44 34 72 105 103 104 116 34 58 49 53 125 93]//反序列化var desp1 []Strcut1 //接收err = json.Unmarshal(sp1, &desp1)if err != nil {fmt.Printf("err: %v\n", err)}fmt.Printf("desp1: %T %[1]v %[1]q\n", desp1) //[]main.Strcut1 [{aa 3 54} {aa 2 54} {aa 6 54} {aa 3 52} {aa 12 15}] [{"aa" '\x03' '6'} {"aa" '\x02' '6'} {"aa" '\x06' '6'} {"aa" '\x03' '4'} {"aa" '\f' '\x0f'}]
}

任意类型切片

package mainimport ("encoding/json""fmt"
)func main() {//二、任意类型切片序列化与反序列化slis := []any{"sss",[]int{1, 2, 3, 4, 5},666,map[int]int{1: 2, 3: 4},}//整体序列化slisall, err := json.Marshal(slis)if err != nil {fmt.Printf("err: %v \n", err)}fmt.Printf("slisall: %v %[1]T\n", slisall) //slisall: [91 34 115 115 115 34 44 91 49 44 50 44 51 44 52 44 53 93 44 54 54 54 44 123 34 49 34 58 50 44 34 51 34 58 52 125 93] []uint8//整体反序列化var aa []any //slis 定义的类型接收err = json.Unmarshal(slisall, &aa)fmt.Printf("aa: %v %[1]T\n", aa) //aa: [sss [1 2 3 4 5] 666 map[1:2 3:4]] []interface {}//每个子值序列化的集合var sli1 [][]byte //返回的是[]uint8，所以这里接收要写[][]uint8 或[][]uint8for _, v := range slis {s, err := json.Marshal(v)if err != nil {fmt.Printf("err: %v\n", err)}sli1 = append(sli1, s)fmt.Printf("s: %v\n", s)}fmt.Printf("sli1: %T %[1]s %[1]v\n", sli1) //sli1: [][]uint8 ["sss" [1,2,3,4,5] 666 {"1":2,"3":4}] [[34 115 115 115 34] [91 49 44 50 44 51 44 52 44 53 93] [54 54 54] [123 34 49 34 58 50 44 34 51 34 58 52 125]]//每个子值序列化的集合  反序列化var aas []anyfor _, v := range sli1 {var aas1 anyerr := json.Unmarshal(v, &aas1)if err != nil {fmt.Printf("err: %v\n", err)}aas = append(aas, aas1)}fmt.Printf("aas: %T %[1]v\n", aas) //aas: []interface {} [sss [1 2 3 4 5] 666 map[1:2 3:4]]}