ExecutorService, Callable

謝小胖老師指導

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

import org.apache.commons.httpclient.HttpClient;

public class TestHttpClients2 implements Callable {
    
    private String sResult;
    private String userId;
    
    public TestHttpClients2(String userId) {
        this.userId = userId;
    }
 
    public String call() throws Exception {
        //logic
        Thread.sleep(1000);
        return sResult;
    }
    
    public static void main(String[] args) {
        
        ExecutorService pool = Executors.newFixedThreadPool(3);
        Set> set = new HashSet>();

        BufferedReader br = null;
        try {
            br = new BufferedReader(new FileReader(new File("C:\\xxx\\xxx.txt")));
            while (br.ready()) {
                   Callable callable = new TestHttpClients2(String.valueOf(br.readLine()));
                   Future future = pool.submit(callable);
                   set.add(future);
            }
            
            for (Future future : set) {
                System.out.println("future=" + future.get());
                System.out.println("future isDone=" + future.isDone());
            }
            
            //logic
            
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (br != null)
                    br.close();
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
    }
}