------- android培训、java培训、期待与您交流! ----------
管道输入流应该连接到管道输出流;管道输入流提供要写入管道输出流的所有数据字节。通常,数据由某个线程从PipedInputStream
对象读取,并由其他线程将其写入到相应的PipedOutputStream
。不建议对这两个对象尝试使用单个线程,因为这样可能死锁线程。管道输入流包含一个缓冲区,可在缓冲区限定的范围内将读操作和写操作分离开。如果向连接管道输出流提供数据字节的线程不再存在,则认为该管道已损坏。
使用举例:
package fighting;
import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
class Read implements Runnable{
private PipedInputStream in;
Read(PipedInputStream in){
this.in = in;
}
public void run(){
try {
byte[] buf = new byte[1024];
int len;
System.out.println("开始读取数据");
len = in.read(buf);
String s = new String(buf,0,len);
System.out.println(s);
in.close();
} catch (IOException e) {
throw new RuntimeException("管道输入流失败");
}
}
}
class Write implements Runnable{
private PipedOutputStream out;
Write(PipedOutputStream out){
this.out = out;
}
public void run(){
try {
System.out.println("开始写入数据,等待6秒后");
Thread.sleep(6000);
out.write("Piped lai la".getBytes());
out.close();
} catch (IOException e) {
throw new RuntimeException("管道输出流失败");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
class PipedDemo{
public static void main(String[] args) {
PipedInputStream in = new PipedInputStream();
PipedOutputStream out = new PipedOutputStream();
try {
in.connect(out);
} catch (IOException e) {
e.printStackTrace();
}
Read r = new Read(in);
Write w = new Write(out);
new Thread(r).start();
new Thread(w).start();
}
}