The gjson module not only supports creating Json objects from the basic JSON data format but also supports creating Json objects from common data formats. Supported data formats include: JSON, XML, INI, YAML, TOML, PROPERTIES. Additionally, it also supports creating Json objects directly from struct objects.

The commonly used methods for object creation are New and Load*. For more methods, please refer to the interface documentation: https://pkg.go.dev/github.com/gogf/gf/v2/encoding/gjson

Creating with the New Method

Creating from JSON Data

jsonContent := `{"name":"john", "score":"100"}`
j := gjson.New(jsonContent)
fmt.Println(j.Get("name"))
fmt.Println(j.Get("score"))
// Output:
// john
// 100

Creating from XML Data

jsonContent := `<?xml version="1.0" encoding="UTF-8"?><doc><name>john</name><score>100</score></doc>`
j := gjson.New(jsonContent)
// Note that there's root node in the XML content.
fmt.Println(j.Get("doc.name"))
fmt.Println(j.Get("doc.score"))
// Output:
// john
// 100

Creating from a Struct Object

type Me struct {
    Name  string `json:"name"`
    Score int    `json:"score"`
}
me := Me{
    Name:  "john",
    Score: 100,
}
j := gjson.New(me)
fmt.Println(j.Get("name"))
fmt.Println(j.Get("score"))
// Output:
// john
// 100

Custom Struct Conversion Tags

type Me struct {
    Name  string `tag:"name"`
    Score int    `tag:"score"`
    Title string
}
me := Me{
    Name:  "john",
    Score: 100,
    Title: "engineer",
}
// The parameter <tags> specifies custom priority tags for struct conversion to map,
// multiple tags joined with char ','.
j := gjson.NewWithTag(me, "tag")
fmt.Println(j.Get("name"))
fmt.Println(j.Get("score"))
fmt.Println(j.Get("Title"))
// Output:
// john
// 100
// engineer

Creating with the Load* Method

The most commonly used methods are Load and LoadContent, the former reads from a file path, and the latter creates a Json object from given content. The methods automatically recognize the data format internally, and automatically parse and convert them to Json objects.

Creating with the Load Method

1. JSON File

    jsonFilePath := gtest.DataPath("json", "data1.json")
    j, _ := gjson.Load(jsonFilePath)
    fmt.Println(j.Get("name"))
    fmt.Println(j.Get("score"))

2. XML File

    jsonFilePath := gtest.DataPath("xml", "data1.xml")
    j, _ := gjson.Load(jsonFilePath)
    fmt.Println(j.Get("doc.name"))
    fmt.Println(j.Get("doc.score"))

Creating with LoadContent

jsonContent := `{"name":"john", "score":"100"}`
j, _ := gjson.LoadContent(jsonContent)
fmt.Println(j.Get("name"))
fmt.Println(j.Get("score"))
// Output:
// john
// 100