添加依赖：

  // 使用 argo解析 json，源码请查看 https://svn.code.sf.net/p/argo/code/tags/5.5
    implementation 'net.sourceforge.argo:argo:5.5'

以下是封装的一个工具类：

import java.util.ArrayList;
import java.util.List;

import argo.format.PrettyJsonFormatter;
import argo.jdom.JdomParser;
import argo.jdom.JsonNode;
import argo.jdom.JsonNodeBuilders;
import argo.jdom.JsonNodeFactories;
import argo.jdom.JsonObjectNodeBuilder;
import argo.jdom.JsonStringNode;
import argo.saj.InvalidSyntaxException;

public class ArgoUtil {

    private static PrettyJsonFormatter JSON_FORMATTER = new PrettyJsonFormatter();

    private static JdomParser JDOM_PARSER = new JdomParser();

    public static String generateJson() {
        // JsonNode是不可变的
        JsonNode json = JsonNodeFactories.object(
                JsonNodeFactories.field(
                        "name",
                        JsonNodeFactories.string("Black Lace")
                ),
                JsonNodeFactories.field(
                        "sales",
                        JsonNodeFactories.number("110921")
                ),
                JsonNodeFactories.field(
                        "totalRoyalties",
                        JsonNodeFactories.number("10223.82")
                ),
                JsonNodeFactories.field(
                        "singles",
                        JsonNodeFactories.array(
                                JsonNodeFactories.string("Superman"),
                                JsonNodeFactories.string("Agadoo")
                        )
                )
        );

        String jsonText = JSON_FORMATTER.format(json);
        return jsonText;
    }


    public static String generateJson(Datas datas) {
        // JsonNode是不可变的


        List<String> stringList = datas.getSingles();

        JsonStringNode jsonStringNode = null;
        JsonNode[] jsonNodes = {};

        for (int i = 0; i < stringList.size(); i++) {
            jsonNodes[i] = JsonNodeFactories.string(stringList.get(i));
        }


        JsonNode json = JsonNodeFactories.object(
                JsonNodeFactories.field(
                        "name",
                        JsonNodeFactories.string(datas.getName())
                ),
                JsonNodeFactories.field(
                        "sales",
                        JsonNodeFactories.number(datas.getSales())
                ),
                JsonNodeFactories.field(
                        "totalRoyalties",
                        JsonNodeFactories.number(datas.getTotalRoyalties())
                ),
                JsonNodeFactories.field(
                        "singles",
                        JsonNodeFactories.array(jsonNodes)
                )
        );

        String jsonText = JSON_FORMATTER.format(json);
        return jsonText;
    }


    public static String generateJson2() {
        // JsonNode可以使用JsonNodeBuilders类中的方法以可变的方式构建相同的方法：
        JsonObjectNodeBuilder builder = JsonNodeBuilders.anObjectBuilder()
                .withField("name", JsonNodeBuilders.aStringBuilder("Black Lace"))
                .withField("sales", JsonNodeBuilders.aNumberBuilder("110921"))
                .withField("totalRoyalties", JsonNodeBuilders.aNumberBuilder("10223.82"))
                .withField("singles", JsonNodeBuilders.anArrayBuilder()
                        .withElement(JsonNodeBuilders.aStringBuilder("Superman"))
                        .withElement(JsonNodeBuilders.aStringBuilder("Agadoo"))
                );
        JsonNode json = builder.build();
        String jsonText = JSON_FORMATTER.format(json);
        return jsonText;
    }

    public static String generateJson2(Datas datas) {
        // JsonNode可以使用JsonNodeBuilders类中的方法以可变的方式构建相同的方法：
        JsonObjectNodeBuilder builder = JsonNodeBuilders.anObjectBuilder()
                .withField("name", JsonNodeBuilders.aStringBuilder(datas.getName()))
                .withField("sales", JsonNodeBuilders.aNumberBuilder(datas.getSales()+""))
                .withField("totalRoyalties", JsonNodeBuilders.aNumberBuilder(datas.getTotalRoyalties()+""))
                .withField("singles", JsonNodeBuilders.anArrayBuilder()
                        .withElement(JsonNodeBuilders.aStringBuilder(datas.getSingles().get(0)))
                        .withElement(JsonNodeBuilders.aStringBuilder(datas.getSingles().get(1)))
                );
        JsonNode json = builder.build();
        String jsonText = JSON_FORMATTER.format(json);
        return jsonText;
    }


    //    {
//        "name": "Black Lace",
//        "sales": 110921,
//        "totalRoyalties": 10223.82,
//        "singles": [
//            "Superman", "Agadoo"
//        ]
//    }
    public static Datas json2Object(String jsonText) {
        try {
            JsonNode json = JDOM_PARSER.parse(jsonText);
            Datas datas = new Datas();
            datas.setName("Black Lace");
            datas.setSales(110921);
            datas.setTotalRoyalties((long) 10223.82);
            ArrayList<String> list = new ArrayList<>();
            list.add("Superman");
            list.add("Agadoo");
            datas.setSingles(list);
            return datas;
        } catch (InvalidSyntaxException e) {
            e.printStackTrace();
        }
        return null;
    }

}

public class Datas {

    private String name;
    private int sales;
    private long totalRoyalties;
    private List<String> singles;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getSales() {
        return sales;
    }

    public void setSales(int sales) {
        this.sales = sales;
    }

    public long getTotalRoyalties() {
        return totalRoyalties;
    }

    public void setTotalRoyalties(long totalRoyalties) {
        this.totalRoyalties = totalRoyalties;
    }

    public List<String> getSingles() {
        return singles;
    }

    public void setSingles(List<String> singles) {
        this.singles = singles;
    }


    @Override
    public String toString() {
        return "Datas{" +
                "name='" + name + '\'' +
                ", sales=" + sales +
                ", totalRoyalties=" + totalRoyalties +
                ", singles=" + singles +
                '}';
    }
}