Golang : Process json data with Jason package
While writing out the tutorial on how to read json data and save to csv, I was thinking ... somehow there must be a third party package out there that will make life easier.
Today, I found the package at https://github.com/antonholmquist/jason. The code below demonstrate how to use Jason package to create an object named Person
easily for further manipulation.
package main
import (
"bufio"
"fmt"
"github.com/antonholmquist/jason"
"os"
)
func main() {
// read data from file
jsonDataFromFile, err := os.Open("./data.json")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
defer jsonDataFromFile.Close()
reader := bufio.NewReader(jsonDataFromFile)
scanner := bufio.NewScanner(reader)
for scanner.Scan() {
person, _ := jason.NewObjectFromBytes([]byte(scanner.Text()))
name, _ := person.GetString("Name") //case sensitive
age, _ := person.GetNumber("Age")
job, _ := person.GetString("Job")
fmt.Printf(" %s, %v job is %s\n", name, age, job)
}
}
Output :
Adam, 36 job is CEO
Eve, 34 job is CFO
Mike, 38 job is COO
Input from data.json file
{"Name":"Adam","Age":36,"Job":"CEO"},
{"Name":"Eve","Age":34,"Job":"CFO"},
{"Name":"Mike","Age":38,"Job":"COO"}
Please see other functions to manipulate json data at https://github.com/antonholmquist/jason
References :
https://godoc.org/github.com/antonholmquist/jason
https://www.socketloop.com/tutorials/golang-read-a-file-line-by-line
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+6.8k Golang : Error reading timestamp with GORM or SQL driver
+11.1k Golang : calculate elapsed run time
+3.6k Adding Skype actions such as call and chat into web page examples
+7.9k Golang : automatically figure out array length(size) with three dots
+8.9k Golang : Use regular expression to get all upper case or lower case characters example
+14.9k Golang : Get IP addresses of a domain name
+7.8k Golang : Apply Histogram Equalization to color images
+6.9k Golang : Gomobile init produce "iphoneos" cannot be located error
+6k Golang : Null and nil value
+12k Golang : Linear algebra and matrix calculation example
+16.3k Golang : [json: cannot unmarshal object into Go value of type]
+6.3k Android Studio : AlertDialog to get user attention example