Arrays 如何在golang中解组json并填充到结构中

如何解组json并填充到结构中。就像我有salesorder和salesorderdetails结构一样。在json中，我将有一条salesorder记录和多个salesorderdetails结构项

以下是我尝试过的用于单个项目和多个项目的go代码，但仅适用于salesorderdetails结构的单个记录

Gocode:

package main

import (
    "encoding/json"
    "fmt"
)

type Order struct {
    SalesId             string `json:"sales_id"`
    Customer string `json:"customer_name"`
    TotalPrice   string `json:"totalprice"`
}
type OrderDetails struct {
    DetailId             string `json:"detail_id"`
    SalesId             string `json:"sales_id"`
    ItemName string `json:"item_name"`
    Qty   string `json:"qty"`
    Price   string `json:"price"`
}
type Temp struct {

    Salesorder Order  `json:"Salesorder"`
    Salesorderdetails OrderDetails  `json:"OrderDetails"`
}

func main() {
    jsonByteArray := []byte(`[{"Salesorder":{"sales_id":"SOO1","customer_name":"CUST1","totalprice":"200"}, "OrderDetails":{"detailid":"1","sales_id":"SOO1","item_name":"ITEM1","qty":"2","price":"100"}}]`)

   //if i use above json it is working and if i use below json its not working
//jsonByteArray := []byte(`[{"Salesorder":{"sales_id":"SOO1","customer_name":"CUST1","totalprice":"200"}, "OrderDetails":{"detailid":"1","sales_id":"SOO1","item_name":"ITEM1","qty":"2","price":"100"},{"detailid":"2","sales_id":"SOO2","item_name":"ITEM2","qty":"3","price":"200"}}]`)

    var temp []Temp
    err := json.Unmarshal(jsonByteArray, &temp)
    if err != nil {
        panic(err)
    }
    fmt.Printf("%+v\n", temp)
    fmt.Printf("%+v\n ", temp[0].Salesorder.SalesId)
}

panic: invalid character '{' looking for beginning of object key string

[{Salesorder:{SalesId:SOO1 Customer:CUST1 TotalPrice:200} Salesorderdetails:{SalesId:SOO1 ItemName:ITEM1 Qty:2 Price:100}}]
SOO1

使用多个项目时出错：

package main

import (
    "encoding/json"
    "fmt"
)

type Order struct {
    SalesId             string `json:"sales_id"`
    Customer string `json:"customer_name"`
    TotalPrice   string `json:"totalprice"`
}
type OrderDetails struct {
    DetailId             string `json:"detail_id"`
    SalesId             string `json:"sales_id"`
    ItemName string `json:"item_name"`
    Qty   string `json:"qty"`
    Price   string `json:"price"`
}
type Temp struct {

    Salesorder Order  `json:"Salesorder"`
    Salesorderdetails OrderDetails  `json:"OrderDetails"`
}

func main() {
    jsonByteArray := []byte(`[{"Salesorder":{"sales_id":"SOO1","customer_name":"CUST1","totalprice":"200"}, "OrderDetails":{"detailid":"1","sales_id":"SOO1","item_name":"ITEM1","qty":"2","price":"100"}}]`)

   //if i use above json it is working and if i use below json its not working
//jsonByteArray := []byte(`[{"Salesorder":{"sales_id":"SOO1","customer_name":"CUST1","totalprice":"200"}, "OrderDetails":{"detailid":"1","sales_id":"SOO1","item_name":"ITEM1","qty":"2","price":"100"},{"detailid":"2","sales_id":"SOO2","item_name":"ITEM2","qty":"3","price":"200"}}]`)

    var temp []Temp
    err := json.Unmarshal(jsonByteArray, &temp)
    if err != nil {
        panic(err)
    }
    fmt.Printf("%+v\n", temp)
    fmt.Printf("%+v\n ", temp[0].Salesorder.SalesId)
}

panic: invalid character '{' looking for beginning of object key string

[{Salesorder:{SalesId:SOO1 Customer:CUST1 TotalPrice:200} Salesorderdetails:{SalesId:SOO1 ItemName:ITEM1 Qty:2 Price:100}}]
SOO1

成功使用单个项目时输出：

package main

import (
    "encoding/json"
    "fmt"
)

type Order struct {
    SalesId             string `json:"sales_id"`
    Customer string `json:"customer_name"`
    TotalPrice   string `json:"totalprice"`
}
type OrderDetails struct {
    DetailId             string `json:"detail_id"`
    SalesId             string `json:"sales_id"`
    ItemName string `json:"item_name"`
    Qty   string `json:"qty"`
    Price   string `json:"price"`
}
type Temp struct {

    Salesorder Order  `json:"Salesorder"`
    Salesorderdetails OrderDetails  `json:"OrderDetails"`
}

func main() {
    jsonByteArray := []byte(`[{"Salesorder":{"sales_id":"SOO1","customer_name":"CUST1","totalprice":"200"}, "OrderDetails":{"detailid":"1","sales_id":"SOO1","item_name":"ITEM1","qty":"2","price":"100"}}]`)

   //if i use above json it is working and if i use below json its not working
//jsonByteArray := []byte(`[{"Salesorder":{"sales_id":"SOO1","customer_name":"CUST1","totalprice":"200"}, "OrderDetails":{"detailid":"1","sales_id":"SOO1","item_name":"ITEM1","qty":"2","price":"100"},{"detailid":"2","sales_id":"SOO2","item_name":"ITEM2","qty":"3","price":"200"}}]`)

    var temp []Temp
    err := json.Unmarshal(jsonByteArray, &temp)
    if err != nil {
        panic(err)
    }
    fmt.Printf("%+v\n", temp)
    fmt.Printf("%+v\n ", temp[0].Salesorder.SalesId)
}

panic: invalid character '{' looking for beginning of object key string

[{Salesorder:{SalesId:SOO1 Customer:CUST1 TotalPrice:200} Salesorderdetails:{SalesId:SOO1 ItemName:ITEM1 Qty:2 Price:100}}]
SOO1

---

Fiddle:使用键更新salesorderdetails

---

您要解码的内容不是有效的JSON。这将是有效的：

{
    "Salesorder": {
        "sales_id": "SOO1",
        "customer_name": "CUST1",
        "totalprice": "200"
    },
    "OrderDetails": {
        "sales_id": "SOO1",
        "item_name": "ITEM1",
        "qty": "2",
        "price": "100"
    }
}

但你所给予的是：

{
    "Salesorder": {
        "sales_id": "SOO1",
        "customer_name": "CUST1",
        "totalprice": "200"
    },
    "OrderDetails": {
        "sales_id": "SOO1",
        "item_name": "ITEM1",
        "qty": "2",
        "price": "100"
    },
    {   // Things become invalid here
        "sales_id": "SOO2",
        "item_name": "ITEM2",
        "qty": "3",
        "price": "200"
    }
}

看起来您正试图给出一个对象列表，在这种情况下，您需要将这些对象括在方括号中

[]

，否则您必须为第二个

OrderDetails

对象提供自己的键。

尝试以下操作：

package main

import (
    "encoding/json"
    "fmt"
)

type Order struct {
    SalesId     string `json:"sales_id"`
    Customer    string `json:"customer_name"`
    TotalPrice  string `json:"totalprice"`
}

type OrderDetails struct {
    SalesId   string `json:"sales_id"`
    ItemName  string `json:"item_name"`
    Qty       string `json:"qty"`
    Price     string `json:"price"`
}

type Temp struct {
    Salesorder Order                  `json:"Salesorder"`
    Salesorderdetails []OrderDetails  `json:"OrderDetails"`
}

func main() {
    jsonByteArray := []byte(`[{"Salesorder":{"sales_id":"SOO1","customer_name":"CUST1","totalprice":"200"}, "OrderDetails":[{"sales_id":"SOO1","item_name":"ITEM1","qty":"2","price":"100"},{"sales_id":"SOO2","item_name":"ITEM2","qty":"3","price":"200"}]}]`)

    var temp []Temp

    err := json.Unmarshal(jsonByteArray, &temp)
    if err != nil {
        panic(err)
    }

    //fmt.Printf("%+v\n", temp)

    // Printing all Orders with some details
    for _, order := range temp {
        fmt.Println("Customer:", order.Salesorder.Customer)

        for _, details := range order.Salesorderdetails {
            fmt.Printf("    ItemName: %s, Price: %s\n", details.ItemName, details.Price)
        }
    }
}

---

OrderDetails现在是一个数组

您的JSON不正确。OrderDetails的第二部分是一个没有键的值，并且不是salesorderdetails结构中用键更新的arrayupdated的一部分。我建议使用JSON验证器，如：或。我也不推荐，我需要的时候就拿一个。在Golang中，请使用制表符而不是4个空格：）如果您不知道如何在Go中使用简单循环，我建议您学习该语言的基础知识。那么我如何输入有效的json？您对输出的期望值确实不清楚。单个

SalesOrder

是否有多个

OrderDetails

？是的，确切地说，单个SalesOrder有多个OrderDetails我认为其他答案为您解决了如何打印结构中的所有项目什么项目？您只有两个主键：Salesorder和OrderDetails。第二个是数组我们如何打印订单详细信息，如何循环？例如，要使用fmt.Printf（“%+v\n”，temp[0].Salesorder.salesid）显示salesid im，我已经更新了代码，请运行新代码。我打印客户和订单的ItemName以及价格