一、前置准备：

1. PostMan
2. 访问的网站：Github
3. 访问的接口：
   https://api.github.com/search/commits?q=committer-date:2017-11-27..2017-12-01&page=1&per_page=100
4. 实现访问：查找2017-11-27到 2017-12-01的100条数据

二、代码实现
1. 使用PostMan输入访问的接口，取得需要的字段，items，和items中repository的字段id，和full_name（可以自己获取想要的字段）

1. java类
   （1）、CommitRepo

public class CommitRepo {
    private String id;
    private String full_name;
    @Override
    public String toString() {
        return "CommitRepo [id=" + id + ", full_name=" + full_name + "]";
    }
    public String getId() {
        return id;
    }
    public String getFull_name() {
        return full_name;
    }
}

（2）、CommitItems

public class CommitItems {
    private CommitRepo repository;//名字要一样（repository）

    public CommitRepo getRepository() {
        return repository;
    }

    @Override
    public String toString() {
        return "CommitItems [repository=" + repository + "]";
    }

}

（3）、GithubCommitsResult

public class GithubCommitsResult {
    private CommitItems[] items;

    public CommitItems[] getItems() {
        return items;
    }

    @Override
    public String toString() {
        return "GithubCommitsResult [items=" + Arrays.toString(items) + "]";
    }
}

（4）、GithubTest测试类

public static void main(String[] args) {
    try {
    URL url = new URL("https://api.github.com/search/commits?q=committer-date:2017-11-27..2017-12-01&page=10&per_page=100");
    HttpsURLConnection https = (HttpsURLConnection) url.openConnection();// 打开连接            
    https.addRequestProperty("Accept","application/vnd.github.cloak-preview");// 设置请求属性

    https.addRequestProperty("Authorization", "Basic "+up);
    https.setDoInput(true);
    InputStream is = https.getInputStream();
    Gson gson = new GsonBuilder().create();
    GithubCommitsResult gcr = gson.fromJson(new InputStreamReader(is),GithubCommitsResult.class);
    for(int i=0;i<gcr.getItems().length;i++){
          System.out.println(gcr.getItems()[i].getRepository().getId());
    }
        is.close();
        https.disconnect();
    } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

（5）、GithubTest测试类代码修改

public static void main(String[] args) {
    String url="https://api.github.com/search/commits?q=committer-date:2017-11-27..2017-12-01&page=1&per_page=100";
    String ret=getGithubApiReply(url);
    Gson gson = new GsonBuilder().create();
    GithubCommitsResult gcr = gson.fromJson(ret,GithubCommitsResult.class);
    System.out.println(gcr.getItems()[99].getRepository().getId());
}

public static String getGithubApiReply(String api_url) {
    String retstr = null;
    try {
        URL url = new URL(api_url);
        HttpsURLConnection https = (HttpsURLConnection) url
                    .openConnection();// 打开连接
        https.addRequestProperty("Accept",
                    "application/vnd.github.cloak-preview");// 设置请求属性       
        https.setDoInput(true);
        InputStream is = https.getInputStream();
        Reader reader = new InputStreamReader(is, "utf-8");
        StringBuffer sb = new StringBuffer();
        int c = -1;
        while ((c = reader.read()) != -1) {
            sb.append((char) c);
        }
        retstr = new String(sb);
        is.close();
        https.disconnect();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return retstr;
}