Java管道流PipedStream

管道读取流和管道写入流可以像管道一样对接上，管道读取流就可以读取管道写入流写入的数据。需要注意的是需要加入多线程技术，因为单线程，先执行read，会发生死锁，因为read方法是阻塞式的，没有数据的read方法会让线程一直等待。

具体代码及测试

 1 package FileDemo;
 2
 3 import java.io.IOException;
 4 import java.io.PipedInputStream;
 5 import java.io.PipedOutputStream;
 6
 7 public class PipedStreamDemo {
 8
 9     /**
10      * @param args
11      * @throws IOException
12      */
13     public static void main(String[] args) throws IOException {
14
15         PipedInputStream pipin = new PipedInputStream();
16         PipedOutputStream pipout = new PipedOutputStream();
17         pipin.connect(pipout);
18         new Thread(new Input(pipin)).start();
19         new Thread(new Output(pipout)).start();
20     }
21
22 }
23
24 class Output implements Runnable {// 管道写入流
25     private PipedOutputStream out;
26
27     Output(PipedOutputStream out) {
28         this.out = out;
29     }
30
31     @Override
32     public void run() {
33         try {
34             // Thread.sleep(50);
35             out.write("管道流PipedStream".getBytes());// 字节输出流不可以直接写入字符串
36         } catch (Exception e) {
37             // TODO: handle exception
38         }
39     }
40 }
41
42 class Input implements Runnable {// 管道读取流
43     private PipedInputStream in;
44
45     Input(PipedInputStream in) {
46         this.in = in;
47     }
48
49     @Override
50     public void run() {
51         try {
52             byte[] buf = new byte[1024];
53             int len = 0;
54             len = in.read(buf);
55             System.out.println(new String(buf, 0, len));
56             in.close();
57         } catch (Exception e) {
58             // TODO: handle exception
59         }
60     }
61
62 }