java - 将 JSONArray 与包含列表的 bean 列表一起使用

Question

我正在尝试使用 json.org 的 JSONArray 对象构造函数将 Java bean 列表转换为 JSON 字符串。

这是豆：

package jackiesdogs.bean;

import java.util.*;

public class UploadLog {
    private String logDescription;
    private List<String> headings;
    private List<List<String>> log;

    public UploadLog(String logDescription, List<String> headings, List<List<String>> log) {
        this.logDescription = logDescription;
        this.headings = headings;
        this.log = log;
    }

    public String getLogDescription() {
        return logDescription;
    }

    public void setLogDescription(String logDescription) {
        this.logDescription = logDescription;
    }

    public List<String> getHeadings() {
        return headings;
    }

    public void setHeadings(List<String> headings) {
        this.headings = headings;
    }

    public List<List<String>> getLog() {
        return log;
    }

    public void setLog(List<List<String>> log) {
        this.log = log;
    }

}

这是我用来将其转换为 JSON 的代码：

JSONArray outputJSON = new JSONArray(output,false);

我希望得到以下信息：

[{"headings":[{"Vendor Order Id"}],"logDescription":"You are attempting to upload a duplicate order.","log":[{[{"132709B"}]}]}]

但相反，我得到：

[{"headings":[{"bytes":[{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}],"empty":false}],"logDescription":"You are attempting to upload a duplicate order.","log":[{}]}]

有任何想法吗？

Answer 1

我只熟悉GSON，还是比较靠谱的。以下适用于 GSON。

import com.google.gson.Gson;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class PlayWithGson2 {
    public static void main(String[] args) throws IOException {
        PlayWithGson pwg = new PlayWithGson();

        List<String> headings = new ArrayList<String>();
        headings.add("Vendor Order Id");

        List<List<String>> log = new ArrayList<List<String>>();
        UploadLog ul = new UploadLog("headings", headings, log);

        Gson gson = new Gson();
        String toJson = gson.toJson(ul);
        System.out.println(toJson);
    }
}

印刷：

{"logDescription":"headings","headings":["Vendor Order Id"],"log":[]}