如何将 JSON 数组转换为对象

Question

我有以下 json{"data":{"0":{"0":"1","1":"Test1","2":"Test2","DT_RowId":"row_1"}}}我想删除外层索引我想要如下{"data":[{"0":"1","1":"Test1","2":"Test2","DT_RowId":"row_1"}]}这应该在 Go 中完成。

Answer 1

你必须做这样的事情：

package main

import (

    "encoding/json"

    "fmt"

)

func main() {

    data1 := make(map[string]map[string]interface{})

    s1 := `{"data":{"0":{"0":"1","1":"Test1","2":"Test2","DT_RowId":"row_1"}}}`

    err := json.Unmarshal([]byte(s1), &data1)

    if err != nil {

        // check error

    }

    data2 := make(map[string][]interface{})

    data2["data"] = []interface{}{data1["data"]["0"]}

    s2, err := json.Marshal(data2)

    if err != nil {

        // check error

    }

    fmt.Printf("%s\n", s2)

    // result will be:

    // {"data":[{"0":"1","1":"Test1","2":"Test2","DT_RowId":"row_1"}]}

}

你可以在操场上检查一下。

并且不要忘记在使用之前检查数据，例如：

// instead of:

data2["data"] = []interface{}{data1["data"]["0"]}

// you must have something like:

val1, ok := data1["data"]

if !ok { ... }

// and

val2, ok := val1["0"]

if !ok { ... }