结构化为JSON序列化

Question

I am trying to create json serialized input data but not sure how to add the backslash () characters. Code below which can convert struct to json but not the way I require

Output: {"new":{"Id":"1","Class":"23"}} Expected: {\"new\":{\"Id\":\"1\",\"Class\":\"23\"}}

package main

import (
    "encoding/json"
    "fmt"
)

type Txn struct {
    Id    string `json:"Id"`
    Class string `json:"Class"`
}

type Send struct {
 New Txn `json:"new"`
}

func main() {
    fmt.Println("Creating serialized json")

    t := Txn{}
    t.Id = "1"
    t.Class = "23"

    fmt.Println(t)

    p := Send{}
    p.New = t

    fmt.Println("my p is", p)

    b, err := json.Marshal(p)
    if err != nil {
        fmt.Println("found some error ", err)
    }

    fmt.Println(string(b))
}

Answer 1

change last line to fmt.Printf("%q", string(b)) - this causes the format to be 'escaped string'.

(or if you want to store the escaped string, ```fmt.Sprintf``)

https://play.golang.org/p/uBq3mnys5gE