java如何将字符串转换为Json和it信息中的extrat

Question

我使用Reformation2和Rxjava2从mongodb和nodeJs服务器插入/获取信息，现在，我接收所有数据作为字符串，但我想从我的基础中获取孔集合信息，所以我需要将字符串转换为JSON并获取每个信息

接收数据的我的代码：

1-服务：

 @POST("collect/get")
    @FormUrlEncoded
    Observable<String> getcollection(@Field("selector") String selector);

2-2客户：

if(instance == null){
            instance = new Retrofit.Builder()
                    .baseUrl("http://transportor.ddns.net:3000/")
                    .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                    .addConverterFactory(ScalarsConverterFactory.create()).build();
        }

3-接收功能

private void getallcollection(String selector) {

        compositeDisposable.add(myServices.getcollection(selector)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<String>(){
                    @Override
                    public void accept(String s) throws Exception {
                        Log.d("infos",s);
                    }
                }));
    }

我已经准备好了收集课程：

public class col {
    private String creator;
    private String emailcol;
    private String date_creation_col;
    private String nom_col;
    private String long_col;
    private String lat_col;
    private String tel_fix_col;
    private String tel_mobile_col;
    private String creatorcreator;
    private String heure_matin_col;
    private String heure_apresmatin_col;
    private String type;
    private String imagePath;

    public col(String creator, String emailcol, String date_creation_col, String nom_col, String long_col, String lat_col, String tel_fix_col, String tel_mobile_col, String creatorcreator, String heure_matin_col, String heure_apresmatin_col, String type, String imagePath) {
        this.creator = creator;
        this.emailcol = emailcol;
        this.date_creation_col = date_creation_col;
        this.nom_col = nom_col;
        this.long_col = long_col;
        this.lat_col = lat_col;
        this.tel_fix_col = tel_fix_col;
        this.tel_mobile_col = tel_mobile_col;
        this.creatorcreator = creatorcreator;
        this.heure_matin_col = heure_matin_col;
        this.heure_apresmatin_col = heure_apresmatin_col;
        this.type = type;
        this.imagePath = imagePath;
    }

    public String getCreator() {
        return creator;
    }

    public void setCreator(String creator) {
        this.creator = creator;
    }

    public String getEmailcol() {
        return emailcol;
    }

    public void setEmailcol(String emailcol) {
        this.emailcol = emailcol;
    }

    public String getDate_creation_col() {
        return date_creation_col;
    }

    public void setDate_creation_col(String date_creation_col) {
        this.date_creation_col = date_creation_col;
    }

    public String getNom_col() {
        return nom_col;
    }

    public void setNom_col(String nom_col) {
        this.nom_col = nom_col;
    }

    public String getLong_col() {
        return long_col;
    }

    public void setLong_col(String long_col) {
        this.long_col = long_col;
    }

    public String getLat_col() {
        return lat_col;
    }

    public void setLat_col(String lat_col) {
        this.lat_col = lat_col;
    }

    public String getTel_fix_col() {
        return tel_fix_col;
    }

    public void setTel_fix_col(String tel_fix_col) {
        this.tel_fix_col = tel_fix_col;
    }

    public String getTel_mobile_col() {
        return tel_mobile_col;
    }

    public void setTel_mobile_col(String tel_mobile_col) {
        this.tel_mobile_col = tel_mobile_col;
    }

    public String getCreatorcreator() {
        return creatorcreator;
    }

    public void setCreatorcreator(String creatorcreator) {
        this.creatorcreator = creatorcreator;
    }

    public String getHeure_matin_col() {
        return heure_matin_col;
    }

    public void setHeure_matin_col(String heure_matin_col) {
        this.heure_matin_col = heure_matin_col;
    }

    public String getHeure_apresmatin_col() {
        return heure_apresmatin_col;
    }

    public void setHeure_apresmatin_col(String heure_apresmatin_col) {
        this.heure_apresmatin_col = heure_apresmatin_col;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getImagePath() {
        return imagePath;
    }

    public void setImagePath(String imagePath) {
        this.imagePath = imagePath;
    }
}

实际上，我收到了所有数据，控制台显示：[{“\u id”：“5e22074673c926147c3a73f5”，“创建日期”列：“17-01-2020”，“创建者”：“Alaeddine”，“emailcol”：amir@gmail.com“，”nom_col“：”amir“，”long_col“：”10.179326869547367“，”lat_col“：”36.83353893150942“，”tel_fix_col“：”123“，”tel_mobile_col“：”1234“，”Address_col“：”巴黎路34“，”heure_matin_col“：”7“，”heure_apresmatin_col“：”5“，”类型“，”收集“，”图像路径“：”mmmmmmmmmm”]

我想知道如何从这个Json中提取例如creator

Answer 1

你可以使用第三方JSON解析器，比如Google GSON，因为你已经在为Android开发了。Java似乎不包含内置的JSON解析器

See this answer