import java.io.File;import java.io.IOException;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import org.apache.commons.io.FileUtils;import org.jsoup.Connection;import org.jsoup.nodes.Document;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.sqr.base.util.LocalUtil;public class ExecutorsDemo {    private static Logger logger = LoggerFactory.getLogger(ExecutorsDemo.class);    public static void main(String[] args) {        ExecutorService executor = Executors.newFixedThreadPool(8);        long t0=System.currentTimeMillis();        int sum = 100;        String listUrl = "http://s.wanfangdata.com.cn/Paper.aspx";        String key = "日";        logger.debug("start pk");        for (int i = 1; i <= sum; i++) {            final int ii=i;            executor.execute(() -> {                Connection con = LocalUtil.connect(listUrl).data("q", key, "f", "top", "p", ii + "");                Document doc = LocalUtil.getDoc(con, false);                try {                    FileUtils.write(new File("d:/输出/wanfangPk1/" + ii + ".html"), doc.html(), "gbk");                } catch (IOException e) {                    e.printStackTrace();                }                logger.debug("日第"+ii+"页");            });        }        executor.shutdown();        while(!executor.isTerminated()){        }        logger.debug("完毕！用时"+LocalUtil.formatTime(System.currentTimeMillis()-t0));    }}

开了八个线程，运行时间大约是单线程的1/8.