目的

记录如何在 golang 中进行 json 序列化和反序列化（与结构体互转）操作的相关代码片段

结构体定义

//大写开头才能在外部包中访问
type Tag struct {
    CreateTime int    `json:"createTime"` //json tag 用于映射json对应的字段
    TagId      int    `json:"tagId"`
    IsDelete   int    `json:"isDelete"`
    TagName    string `json:"tagName"`
}

type Tags struct {
    Data []Tag `json:"data"`
    Flag bool  `json:"flag"`
}

解析 Json 字符串转为结构体

func GetTags() (result Tags, err error) {
    //请求服务器获取json
    res, err := http.Get("http://wallpaper.upupoo.com/async/getTags.htm?callback=")
    if err != nil {
        return
    }

    body, err := ioutil.ReadAll(res.Body)
    res.Body.Close()
    if err != nil {
        return
    }

    //多了两个括号需要移除掉
    tmpJson := string(body[1 : len(body)-1])

    // // 用字符串声明的方式
    // tmpJson = `({"data":[{"createTime":1483243995000,"tagId":0,"isDelete":1,"tagName":"全部"},{"createTime":1483519853000,"tagId":2,"isDelete":1,"tagName":"游戏风象"},{"createTime":1483519857000,"tagId":3,"isDelete":1,"tagName":"鬼畜"},{"createTime":1483596223000,"tagId":4,"isDelete":1,"tagName":"绝对领域"},{"createTime":1483596225000,"tagId":5,"isDelete":1,"tagName":"女朋友"},{"createTime":1483883866000,"tagId":6,"isDelete":1,"tagName":"萌物"},{"createTime":1483883879000,"tagId":7,"isDelete":1,"tagName":"美の風景"},{"createTime":1483883899000,"tagId":9,"isDelete":1,"tagName":"神曲"},{"createTime":1483883912000,"tagId":11,"isDelete":1,"tagName":"解忧杂货铺"},{"createTime":1484084578000,"tagId":12,"isDelete":1,"tagName":"ACG动漫"},{"createTime":1484084588000,"tagId":13,"isDelete":1,"tagName":"艺术感知"},{"createTime":1484328498000,"tagId":1,"isDelete":1,"tagName":"抖不停"},{"createTime":1484333623000,"tagId":10,"isDelete":1,"tagName":"科幻世界"}],"flag":true})`
    // runes := []rune(tmpJson)
    // // 处理多余的括号
    // tmpJson = string(runes[1 : len(runes)-1])

    // 反序列化
    err = json.Unmarshal([]byte(tmpJson), &result)
    return
}