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JSON data validation in Golang can be achieved by using the Unmarshal function of the encoding/json package to decode JSON data into a Go struct corresponding to the JSON structure. The steps are as follows: Define the struct corresponding to the JSON data structure as a verification blueprint. Use the Unmarshal function to decode and verify whether it is compatible with the type of struct. For more complex validation, write a custom validation function.
JSON (JavaScript Object Notation) is a lightweight and widely used format for data exchange. In Golang, we can use the encoding/json
package to validate JSON data.
import ( "encoding/json" "log" )
First, we need to define a Go struct corresponding to the JSON data structure. This will serve as a blueprint for validation.
type User struct { Name string `json:"name"` Age int `json:"age"` Email string `json:"email"` IsAdmin bool `json:"is_admin"` }
Now, we can use the Unmarshal
function provided by the encoding/json
package to decode the JSON data into our struct :
func validateJSON(jsonString string) (User, error) { var user User if err := json.Unmarshal([]byte(jsonString), &user); err != nil { log.Printf("Error unmarshaling JSON: %v", err) return User{}, err } return user, nil }
Let us consider a string containing the following JSON data:
{ "name": "Alice", "age": 25, "email": "alice@example.com", "is_admin": false }
We can validate it using the validateJSON
function :
jsonString := `{ "name": "Alice", "age": 25, "email": "alice@example.com", "is_admin": false }` user, err := validateJSON(jsonString) if err != nil { log.Fatal(err) } fmt.Println("Validated user:", user) // 输出:Validated user: {Alice 25 alice@example.com false}
Unmarshal
The function can be used to verify whether the data is compatible with the types in the Go struct. For more complex validation, we need to write a custom validation function.
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