英文:
Appending data to json and getting it back as a map GOLANG
问题
我对JSON和GO都不太熟悉，但我可以帮你翻译代码部分。以下是翻译好的代码：
type DATA struct{
Key string
Value string
}
func writeToDB(key, value string) bool {
var jsonText = []byte(`[
{"Key":"","Value":""}
]`)
var indent []DATA
err := json.Unmarshal([]byte(jsonText), &indent)
if err != nil {
fmt.Println(err)
}
indent = append(indent, DATA{Key:key, Value: value})
result, error := json.MarshalIndent(indent, "", " ")
if error != nil {
fmt.Println(error)
}
f, erro := os.OpenFile("db.json", os.O_APPEND|os.O_WRONLY, 0666)
if erro != nil {
fmt.Println(erro)
}
n, err := io.WriteString(f, string(result))
if err != nil {
fmt.Println(n, err)
}
return true
}
文件的输出结果将会是这样的：
[
{
"Key":"k1ey",
"Value":"val1ue"
},
{
"Key":"k133ey",
"Value":"val1ue"
}
]
但是你想要的格式是这样的：
{
"key":"value",
"key":"value",
"key":"value"
}
我无法确保这段代码是否能达到你的要求，因为我对GO的JSON集成不太了解。希望这能帮到你。
英文:
I'm quite new to json and GO, I want to create a key and value based json file, which will append the data in key and value format, later will export it as a map(key and value), the data will save inside the db.json for later, to find the key value.
this is what I have:
type DATA struct{
Key string
Value string
}
func writeToDB(key, value string) bool {
var jsonText = []byte(`[
Key:"", Value:""
]`)
var indent []DATA
err := json.Unmarshal([]byte(jsonText), &indent)
if err != nil {
fmt.Println(err)
}
indent = append(indent, DATA{Key:key, Value: value})
result, error := json.Marshal(indent)
if error != nil {
fmt.Println(error)
}
f, erro := os.OpenFile("db.json", os.O_APPEND|os.O_WRONLY, 0666)
if erro != nil {
fmt.Println(erro)
}
n, err := io.WriteString(f, string(result))
if err != nil {
fmt.Println(n, err)
}
return true
}
the output of the file is like:
[{"Key":"k1ey","Value":"val1ue"}][{"Key":"k133ey","Value":"val1ue"}]
but I want something like:
{
key:value
key:value
key:value
}
I can't get it right, I read many articles, but GO doesn't have an simple json integration
答案1
得分: 1
你需要将一个对象数组转换为映射（map），以下是一个基本示例：
func saveDbAsMap(db []DATA) {
// 初始化一个字符串映射
var dbAsMap = make(map[string]interface{})
// 将对象数组转换为映射
for i := 0; i < len(db); i++ {
entry := db[i]
dbAsMap[entry.Key] = entry.Value
}
// 将其转换为 JSON
dbAsMapBytes, error := json.Marshal(dbAsMap)
if error != nil {
fmt.Println(error)
}
// 将其写入文件
error = os.WriteFile("db.json", dbAsMapBytes, 0644)
if error != nil {
fmt.Println(error)
}
}
用于测试的代码：
var db []DATA
func addToDB(key, value string) {
db = append(db, DATA{Key: key, Value: value})
}
func main() {
addToDB("key1", "value1")
addToDB("key2", "value2")
addToDB("key3", "value3")
saveDbAsMap(db)
}
在 db.json 中的输出结果为：
{"key1":"value1","key2":"value2","key3":"value3"}
英文:
You need to convert an array of objects to a map, here is a basic example:
func saveDbAsMap(db []DATA) {
// Initialize a string map
var dbAsMap = make(map[string]interface{})
// Convert array of objects to map
for i := 0; i < len(db); i++ {
entry := db[i]
dbAsMap[entry.Key] = entry.Value
}
// Marshal it to JSON
dbAsMapBytes, error := json.Marshal(dbAsMap)
if error != nil {
fmt.Println(error)
}
// Write it to file
error = os.WriteFile("db.json", dbAsMapBytes, 0644)
if error != nil {
fmt.Println(error)
}
}
For testing:
var db []DATA
func addToDB(key, value string) {
db = append(db, DATA{Key: key, Value: value})
}
func main() {
addToDB("key1", "value1")
addToDB("key2", "value2")
addToDB("key3", "value3")
saveDbAsMap(db)
}
Output in db.json:
{"key1":"value1","key2":"value2","key3":"value3"}
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