httpclient 多线程爬虫实例(转)

https://zhuanlan.zhihu.com/p/82856691

本人最近在研究安全测试的过程中，偶然发现某站一个漏洞，在获取资源的时候竟然不需要校验，原来设定的用户每天获取资源的次数限制就没了。赶紧想到用爬虫多爬一些数据，但是奈何数据量太大了，所以想到用多线程来爬虫。经过尝试终于完成了，脚本写得比较粗糙，因为没真想爬完。预计10万数据量，10个线程，每个线程爬1万，每次爬100个数据（竟然是 get 接口，有 url 长度限制）。

分享代码，供大家参考。

package practise;

import java.util.Date;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.http.client.methods.HttpGet;
import net.sf.json.JSONObject;
import source.ApiLibrary;

public class LoginDz extends ApiLibrary {

    public static void main(String[] args) {
        LoginDz loginDz = new LoginDz();
        loginDz.excuteTreads();
        testOver();
    }

    public JSONObject getTi(int[] code, String name) {
        JSONObject response = null;
        String url = "***********";
        JSONObject args = new JSONObject();
        // args.put("ID_List", getTiId(884969));
        args.put("ID_List", getTiId(code));
        HttpGet httpGet = getHttpGet(url, args);
        response = getHttpResponseEntityByJson(httpGet);
        // output(response.toString());
        String text = response.toString();
        if (!text.equals("{\"success_response\":[]}"))
            logLog("name", response.toString());
        output(response);
        return response;
    }


    public String getTiId(int... id) {
        StringBuffer result = new StringBuffer();
        int length = id.length;
        for (int i = 0; i < length; i++) {
            String abc = "filter[where][origDocID][inq]=" + id[i] + "&";
            result.append(abc);
        }
        return result.toString();
    }

    /**
     * 执行多线程任务
     */
    public void excuteTreads() {
        int threads = 10;
        ExecutorService executorService = Executors.newFixedThreadPool(threads);
        CountDownLatch countDownLatch = new CountDownLatch(threads);
        Date start = new Date();
        for (int i = 0; i < threads; i++) {
            executorService.execute(new More(countDownLatch, i));
        }
        try {
            countDownLatch.await();
            executorService.shutdown();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        Date end = new Date();
        outputTimeDiffer(start, end);
    }

    /**
     * 多线程类
     */
    class More implements Runnable {
        public CountDownLatch countDownLatch;
        public int num;

        public More(CountDownLatch countDownLatch, int num) {
            this.countDownLatch = countDownLatch;
            this.num = num;
        }

        @Override
        public void run() {
            int bound = num * 10000;

            try {
                for (int i = bound; i < bound + 10000; i += 100) {
                    int[] ids = new int[100];
                    for (int k = 0; k < 100; k++) {
                        ids[i] = i + k;
                        getTi(ids, bound + "");
                    }
                }
            } finally {
                countDownLatch.countDown();
            }
        }

    }

}