Question

我正在使用JSoup来抓取Instagram API。我目前正在做一些简单的事情：抓住我自己的信息。

当我通过API查询自己时，它会返回以下字符串：

{"meta": {"code": 200}, "data": {"username": "jon_perron", "bio": "George Brown", "website": "http://jonathanperron.ca", "profile_picture": "https://scontent.cdninstagram.com/t51.2885-19/10865203_1593678807517862_1617189064_a.jpg", "full_name": "Jonathan Perron", "counts": {"media": 30, "followed_by": 51, "follows": 67}, "id": "1510848960"}}

我想拆分此字符串以删除所有不必要的数据并仅保留我想要的信息。我希望保留与我的帐户相关的所有信息。（用户名，生物，网站，个人资料图片，全名和计数）

如何清理这个字符串并将这些信息留在后面？

Answer 1

而是使用JSON解析器库（例如Jackson）并将其转换为正确的POJO。

Answer 2

@Rorscharc建议是一个很好的选择。只需使用您需要的attrs创建类，并使用外部库（Jackson，Gson）将其从Json转换为Java对象

实施例： http://www.doublecloud.org/2015/03/gson-vs-jackson-which-to-use-for-json-in-java/

比较：

Jackson Vs. Gson

Answer 3

试试这个

JSONParser parser = new JSONParser();
try {
    Object object = parser.parse(jsonString);
    JSONArray array = (JSONArray) object;

    JSONArray meta = (JSONArray) array.get("meta");
    JSONObject jsonObject = (JSONObject) meta.get("code");
} catch (ParseException e) {
    e.printStackTrace();
}

Answer 4

尝试以下代码

API（杰克逊2：核心，数据绑定，注释）

public class Counts {

    private int media;

    private int followed_by;

    private int follows;

    @JsonProperty("media")
    public int getMedia() {
        return media;
    }

    public void setMedia(int media) {
        this.media = media;
    }

    @JsonProperty("followed_by")
    public int getFollowed_by() {
        return followed_by;
    }

    public void setFollowed_by(int followed_by) {
        this.followed_by = followed_by;
    }

    @JsonProperty("follows")
    public int getFollows() {
        return follows;
    }

    public void setFollows(int follows) {
        this.follows = follows;
    }

}

public class Data {

    private String username;
    private String bio;
    private String website;
    private String profile_picture;
    private String full_name;
    private Counts counts;
    private String id;

    @JsonProperty("username")
    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    @JsonProperty("bio")
    public String getBio() {
        return bio;
    }

    public void setBio(String bio) {
        this.bio = bio;
    }

    @JsonProperty("website")
    public String getWebsite() {
        return website;
    }

    public void setWebsite(String website) {
        this.website = website;
    }

    @JsonProperty("profile_picture")
    public String getProfile_picture() {
        return profile_picture;
    }

    public void setProfile_picture(String profile_picture) {
        this.profile_picture = profile_picture;
    }

    @JsonProperty("full_name")
    public String getFull_name() {
        return full_name;
    }

    public void setFull_name(String full_name) {
        this.full_name = full_name;
    }

    @JsonProperty("counts")
    public Counts getCounts() {
        return counts;
    }

    public void setCounts(Counts counts) {
        this.counts = counts;
    }

    @JsonProperty("id") 
    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

}

public class Meta {


    private int code;

    @JsonProperty("code")
    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

}

public class User {

    private Meta meta;
    private Data data;

    @JsonProperty("meta")
    public Meta getMeta() {
        return meta;
    }

    public void setMeta(Meta meta) {
        this.meta = meta;
    }

    @JsonProperty("data")
    public Data getData() {
        return data;
    }

    public void setData(Data data) {
        this.data = data;
    }

}

public class JsonParserClass {

    public Object parseJsonToObject(String jsonString, Class type)
        throws JsonParseException, JsonMappingException, IOException {

        ObjectMapper mapper = new ObjectMapper();

        Object object = mapper.readValue(jsonString, type);

        return object;
    }

}

public class Tester implements AutoCloseable{

    public static void main(String[] args) {

        try {
            String jsonString = (new Scanner(System.in)).nextLine();
            User user = (User) new JsonParserClass().parseJsonToObject(jsonString, User.class);
            System.out.println(user.getData().getFull_name());
        } catch (JsonParseException e) {
            e.printStackTrace();
        } catch (JsonMappingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    @Override
    public void close() throws Exception {

    }

}

Java - 如何拆分以下字符串以获取我需要的信息？

4 个答案: