json - 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"}}}

我要去掉外层索引

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"}]}
}

可以在playground中查看.
不要忘记在使用前检查数据，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 { ... }