一個基于Java實作的Github issue圖檔自動下載下傳工具

package youdao;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.json.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class Github {

    private static String mTitle = null;
    private static final String PREFIX = "C:\\Users\\i042416\\Pictures\\";
    
    private static void createFolder(String title){
        DownloadTask.FOLDER = PREFIX + title;
        File file = new File( DownloadTask.FOLDER);
        file.mkdir();
    }
    
    
    private static List<DownloadTask> getGithubPicUrlList(String formattedUrl){
        HttpClient client = HttpClients.createDefault();
        List<DownloadTask> resultPic = new ArrayList<DownloadTask>();
        int index = 0;
        
        HttpGet get = new HttpGet(formattedUrl);
            try {
                HttpResponse response = client.execute(get);
                HttpEntity entity = response.getEntity();
                String result = EntityUtils.toString(entity, "UTF-8");
                JSONObject obj = new JSONObject(result);
                
                mTitle = obj.get("tl").toString();
                createFolder(mTitle);
                String content = obj.get("content").toString();
                // System.out.println("content: " + content);
                
                Matcher m = Pattern.compile("src\\s*=\\s*\"?(.*?)(\"|>|\\s+)").matcher(content);
                while (m.find()) {
                        // System.out.println(m.group(1));
                        DownloadTask task = new DownloadTask(m.group(1), index++);
                        resultPic.add(task);
                }
            } catch (Exception e){
                e.printStackTrace();
            }
            return resultPic;
    }
    
    private static List<DownloadTask> getGithubIssuePicUrlList(String githubIssueUrl){
        HttpClient client = HttpClients.createDefault();
        List<DownloadTask> resultPic = new ArrayList<DownloadTask>();
        int index = 0;
        
        HttpGet get = new HttpGet(githubIssueUrl);
            try {
                HttpResponse response = client.execute(get);
                HttpEntity entity = response.getEntity();
                String result = EntityUtils.toString(entity, "UTF-8");
                JSONObject obj = new JSONObject(result);
                
                mTitle = obj.get("title").toString();
                createFolder(mTitle);
                String content = obj.get("body").toString();
                System.out.println("content: " + content);
                
                // ![clipboard2](https://user-int.com/5669954/32708736946.png)
                
                
                // Matcher m = Pattern.compile("^\\d{n,}$").matcher(content);
                Matcher m = Pattern.compile(".*!\\[.*?\\]\\(.*?\\).*").matcher(content);
                while (m.find()) {
                        // System.out.println(m.group(1));
                        DownloadTask task = new DownloadTask(m.group(1), index++);
                        resultPic.add(task);
                }
            } catch (Exception e){
                e.printStackTrace();
            }
            return resultPic;
    }
    
    private static void start(List<DownloadTask> task){
        if( task.isEmpty()){
            System.out.println("No picture to download!");
            return;
        }
        System.out.println("Total pic to be downloaded: " + task.size());
        ExecutorService executor = Executors.newFixedThreadPool(10);
        
        for( int i = 0; i < task.size(); i++){
            PictureDownloader cc = new PictureDownloader(task.get(i));
            executor.execute(cc);           
        }
        
        executor.shutdown();
        while (!executor.isTerminated()) {
        }
        
        System.out.println("download finished");
    }
    
    public static void main(String[] args) {
        
        /*String urlStr = "https://api.github.com/repos/i042416/KnowlegeRepository/issues/955";
        
        System.out.println(urlStr);
        List<DownloadTask> task = getGithubIssuePicUrlList(urlStr);
        start(task);*/
        
        String a = "![clipboard1](https://user-images.githubusercontent.com/5669954/32708735-bc205af6-c866-11e7-8314-cdcd2b33f050.png) fuck";
        a = a + "\n" + "![clipboard2](https://user-images.githubusercontent.com/5669954/32708736-bc54ae78-c866-11e7-9ab8-40b2fde6c946.png)";
        Matcher m = Pattern.compile(".*\\!\\[.*\\]\\((.*)\\).*").matcher(a);
        while (m.find()) {
                int group_code = m.groupCount();
                System.out.println("group count: " + group_code);
                System.out.println("image: " + m.group(1));
        }
        
    }
}