Question

在桌面软件中，用户可以预先显示按钮并刷新数据库＆＃34;。

所有信息都由在线服务提供，该服务返回JSON响应，这些响应保存到 DAT 文件中，然后使用http://www.json.org/java/index.html进行解析，以便保存到内存变量中作为字符串。 DAT 文件仅用于支持break-exception。

好的，所以我创建了一个SwingWorker类：

解析内存变量
遍历元素
恢复项目
更新进度条

这是JSON代码的示例：

{
  "key":"value",
  "data":{
    "Name1":{...},
    "Name2":{...},
    [...]
  }
}

＆＃34;数据＆＃34;的完整迭代element将创建一个List，我必须使用它创建一个JTable并填充GUI的主框架。但是在执行SwingWorker时，它只返回一个List，其中所有元素都是JSON的最后一项。

这里是SwingWorker的代码：

package com.wolfchamane.lolapi;

import com.wolfchamane.logging.LoCLogger;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import javax.swing.*;
import org.json.JSONArray;
import org.json.JSONObject;

public class LoLChampions extends SwingWorker{

    private static List<LoLChampion> _list;
    private static JProgressBar _status;
    private static LoCLogger _log;
    private static String _exePath;
    private static String _version;
    private static LoLDDBB _ddbb;
    //private static int _max;

    public List<LoLChampion> getDataTable(){
        return _list;
    }

    public LoLChampions(){}
    public LoLChampions(JProgressBar status){
        this();
        _status = status;
    }
    public LoLChampions(JProgressBar status, LoCLogger log){
        this(status);
        _log = log;
    }
    public LoLChampions(JProgressBar status, LoCLogger log, String path){
        this(status, log);
        _exePath = path;
    }
    public LoLChampions(JProgressBar status, LoCLogger log, String path, LoLDDBB ddbb){
        this(status, log, path);
        _ddbb = ddbb;
    }
    public LoLChampions(JProgressBar status, LoCLogger log, String path, LoLDDBB ddbb, String version) throws Exception{
        this(status, log, path, ddbb);
        _version = version;
    }


    @Override
    protected Object doInBackground() throws Exception {
        getChampionsInfo(_ddbb.getJSONChampions());        
        return true;
    }

    public void getChampionsInfo(JSONObject jsonChampions) throws Exception{

        String fldrImgsPath = _exePath+File.separator+"images";
        String fldrImgsChampions = fldrImgsPath+File.separator+"champions";

        File fldrImages = new File(fldrImgsPath);
        if (fldrImages.isDirectory() || fldrImages.mkdir()){

            File fldrChampions = new File(fldrImgsChampions);
            if (fldrChampions.isDirectory() || fldrChampions.mkdir()){

                JSONObject data = jsonChampions.getJSONObject("data");
                JSONArray championsNames = data.names();

                int _max = championsNames.length();
                _status.setMaximum(_max);

                if (_list == null)
                    _list = new ArrayList<LoLChampion>();

                int curr = _list.size();
                for (int i = 0; i < _max; i++){
                    _status.setString("Fetching ["+(curr+1)+"/"+_max+"] champions icos");

                    //Champion object
                    LoLChampion champion = new LoLChampion();

                    //Champion name
                    String name = String.valueOf(championsNames.get(i));
                    champion.setChampionName(name);
                    //Champion data
                    JSONObject jsonChamp = data.getJSONObject(name);

                    //Champion roles
                    JSONArray tags = jsonChamp.getJSONArray("tags");
                    //Main role
                    String mRole = String.valueOf(tags.get(0));
                    champion.setChampionMainRole(mRole);
                    //Secondary role (if exists)
                    String sRole = "";                    
                    if (tags.length() > 1)
                        sRole = String.valueOf(tags.get(1));
                    champion.setChampionSecondRole(sRole);

                    //Champion ico.
                    File pf = new File(fldrChampions.getPath()+File.separator+name+".jpg");
                    saveChampionImage(name, pf);                                
                    champion.setChampionIco(pf);

                    //Push LoLChampion object to list
                    _list.add(champion);

                    //Update status bar
                    curr = _list.size();
                    _status.setValue(curr);

                    System.gc();
                }//for:i

                _ddbb.setChampionsList(_list);

            }else{
                _log.error("Couldn't access or create \""+fldrImgsChampions+"\" folder");
                throw new Exception("Couldn't access or create \""+fldrImgsChampions+"\" folder");
            }//fi
        }else{
            _log.error("Couldn't access or create \""+fldrImgsPath+"\" folder");
            throw new Exception("Couldn't access or create \""+fldrImgsPath+"\" folder");
        }//fi

    }

    private void saveChampionImage(String name, File pf) throws Exception{

        String endPointURL = (new ApiURLs()).getChampionsIcoURL();
        endPointURL = endPointURL.replace("{version}", _version);
        endPointURL = endPointURL.replace("{champion}", name);

        try{

            if (!pf.canWrite())
                pf.createNewFile();

            URL url = new URL(endPointURL);
            InputStream is = url.openStream();
            OutputStream os = new FileOutputStream(pf);

            _log.info("Getting \""+endPointURL+"\"");
            _log.info("Saving to \""+pf.getPath()+"\"");

            byte[] buffer = new byte[2048];
            int length;
            while((length = is.read(buffer)) != -1){
                os.write(buffer, 0, length);
            }//while

            is.close();
            os.close();

        }catch(Exception ex){
            _log.error(ex.getMessage());
        }
    }
}

更新

这是我要解析的完整JSON： https://global.api.pvp.net/api/lol/static-data/euw/v1.2/champion?champData=tags&api_key=d34be821-7f22-4d55-85da-7409413e6379

Answer 1

我不认为您的JSON示例格式正确。 JSON由名称值对组成。应该有一个＆＃34;：＆＃34;在名称和价值之间。

这样的事情：

{
    "glossary": {
        "title": "example glossary",
        "GlossDiv": {
            "title": "S",
            "GlossList": {
                "GlossEntry": {
                    "ID": "SGML",
                    "SortAs": "SGML",
                    "GlossTerm": "Standard Generalized Markup Language",
                    "Acronym": "SGML",
                    "Abbrev": "ISO 8879:1986",
                    "GlossDef": {
                        "para": "A meta-markup language, used to create markup languages such as DocBook.",
                        "GlossSeeAlso": ["GML", "XML"]
                    },
                    "GlossSee": "markup"
                }
            }
        }
    }
}

您提供的JSON示例看起来格格不入。有关详细信息，请参阅json.org

Java JSON只恢复一个项目

1 个答案: