java.nio.channels.Pipe使用例子详解编程语言

Java.nio.channels.Pipe 提供一种机制，可以按照写入的顺序读取数据。 Pipe.SinkChannel用来向管道写入数据，而Pipe.SourceChannel用来从管道读取数据：

PipeTest.java

package cn.outofmemory.nio.channels; 
import java.io.IOException; 
import java.nio.ByteBuffer; 
import java.nio.channels.Pipe; 
 
public class PipeTest { 
  public static void main(String[] args) throws IOException { 
 
      //初始化Pipe实例 
      Pipe pipe = Pipe.open(); 
 
      // 获取写通道 
      Pipe.SinkChannel skChannel = pipe.sink(); 
 
      String testData = "Test Data to Check java NIO Channels Pipe."; 
 
      ByteBuffer buffer = ByteBuffer.allocate(512); 
      buffer.clear(); 
      buffer.put(testData.getBytes()); 
 
      buffer.flip(); 
       //向写通道写入数据 
      while(buffer.hasRemaining()) { 
          skChannel.write(buffer); 
      } 
      //获得读取数据通道 
      Pipe.SourceChannel sourceChannel = pipe.source(); 
      buffer = ByteBuffer.allocate(512); 
 
     //将读取数据写到控制台      
      while(sourceChannel.read(buffer) > 0){ 
 
          //flip方法将当前读取位置设置为0， limit设置为写入数据的size 
         buffer.flip(); 
 
          while(buffer.hasRemaining()){ 
              char ch = (char) buffer.get(); 
              System.out.print(ch); 
          } 
 
          //clear方法将buffer的limit设置为其容量capacity， 将position设置为0 
          buffer.clear(); 
      } 
 
  } 
}

输出如下：

Test Data to Check java NIO Channels Pipe.