Golang中处理JSON字符串相关

参考文章

Go Json三方包哪家强？

jsoniter

github.com/json-iterator/go

注意下里面的 benchmark，基准测试的写法！！！有每种json处理的性能测试！！！

type student struct {
    Name string
    Age  int
}

// jsoniter
func TestT1(t *testing.T) {

    // Marshal
    s1 := student{
        Name: "whw",
        Age:  22,
    }

    marshalRet, errMarshal := jsoniter.Marshal(&s1)
    require.Equal(t, errMarshal, nil)
    fmt.Printf("marshalRet: %T, %v \n", marshalRet, string(marshalRet)) // marshalRet: []uint8, {"Name":"whw","Age":22}

    // 直接转为字符串
    strRet, errRet := jsoniter.MarshalToString(&s1)
    require.Equal(t, errRet, nil)
    fmt.Printf("strRet: %T, %v \n", strRet, strRet) // strRet: string, {"Name":"whw","Age":22}

    // Unmarshal
    s2 := new(student) // 得到一个指针

    errUnMarshal := jsoniter.Unmarshal(marshalRet, s2) // 记得这里用 指针 接收
    require.Equal(t, errUnMarshal, nil)
    fmt.Printf(">>> %v, %v \n", s2.Name, s2.Age)

    // 根据字符串解析
    s3 := new(student) // 指针
    str3 := `{"Name":"sasuke","Age":25}`
    err3 := jsoniter.UnmarshalFromString(str3, s3)
    require.Equal(t, err3, nil)
    fmt.Println("s3: ", s3.Name, s3.Age) // sasuke 25

}

～～～

gjson

https://github.com/tidwall/gjson

func TestT2(t *testing.T) {
    const json = `{"name":{"first":"Janet","last":"Prichard"},"age":47}`

    last := gjson.Get(json, "name.last")
    age := gjson.Get(json, "age")

    fmt.Println("last: ", last) // Prichard
    fmt.Println("age: ", age)   // 47

}

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