/* 管道流: PipedInputStream void connect(PipedOutputStream src) 使此管道输入流连接到管道输出流 src PipedOutputStream void connect(PipedInputStream snk) 在JDK我们看到PipedInputStream中有管道缓冲区,用来接收数据 管道流内部在实现时还有大量的对同步数据的处理 管道输出流和管道输入流执行时不能互相阻塞,所以一般要开启独立线程分别执行 顺便复习了多线程操作 [示例]:管道流 */ import java.io.*; class Demo { public static void main(String[] args) throws Exception { PipedInputStream pin = new PipedInputStream(); PipedOutputStream pout = new PipedOutputStream(); pin.connect(pout); //输入流与输出流连接 ReadThread readTh = new ReadThread(pin); WriteThread writeTh = new WriteThread(pout); new Thread(readTh).start(); new Thread(writeTh).start(); } public static void sop(Object obj) //打印 { System.out.println(obj); } } class ReadThread implements Runnable { private PipedInputStream pin; ReadThread(PipedInputStream pin) // { this.pin=pin; } public void run() //由于必须要覆盖run方法,所以这里不能抛,只能try { try { sop("R:读取前没有数据,阻塞中...等待数据传过来再输出到控制台..."); byte[] buf = new byte[1024]; int len = pin.read(buf); //read阻塞 sop("R:读取数据成功,阻塞解除..."); String s= new String(buf,0,len); sop(s); //将读取的数据流用字符串以字符串打印出来 pin.close(); } catch(Exception e) { throw new RuntimeException("R:管道读取流失败!"); } } public static void sop(Object obj) //打印 { System.out.println(obj); } } class WriteThread implements Runnable { private PipedOutputStream pout; WriteThread(PipedOutputStream pout) { this.pout= pout; } public void run() { try { sop("W:开始将数据写入:但等个5秒让我们观察..."); Thread.sleep(5000); //释放cpu执行权5秒 pout.write("W: writePiped 数据...".getBytes()); //管道输出流 pout.close(); } catch(Exception e) { throw new RuntimeException("W:WriteThread写入失败..."); } } public static void sop(Object obj) //打印 { System.out.println(obj); } }
参考文章:
http://xouou.iteye.com/blog/1333475
管道流总结:
http://www.360doc.com/content/14/0317/10/9297708_361219121.shtml
时间: 2024-10-26 15:18:09