java.io.stream

1.

package com.io.Stream;
import java.io.*;
public class NyFileInputStream1 {

 /**
  * 读取文件的streamIO
  *
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  new NyFileInputStream1();
 }
 public NyFileInputStream1(){
  InputStream fis=null;
  FileOutputStream fos=null;
  try {
   fis=new FileInputStream(new File("D:\\Zh.java"));
   //fis=new ByteArrayInputStream("wo hao 周海".getBytes());
   fos=new FileOutputStream(new File("D:\\Zhouhai.txt"),true);
   int len=0;
   byte bytes[]=new byte[1024];
   while( (len=fis.read(bytes))!=-1){
    fos.write(bytes,0,len);
    System.out.println(len);
   }
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }finally{
   try {
    fos.close();
    fis.close();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
 }

}

2.

package com.io.Stream;

import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
/**向管道输出流 写数据的线程
 * @param args
 */
public class PipedSender extends Thread{

 private PipedOutputStream out=new PipedOutputStream();
 public PipedOutputStream getPipedOutputStream()
 {
  return out;
 }

 public void run(){
  try {
   for(int i=-127;i<=128;i++){
    out.write(i);
    this.yield();
   }
  } catch (Exception e) {
   // TODO: handle exception
  }finally{
   try {
    out.close();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
 }

 public static void main(String[] args) {
  // TODO Auto-generated method stub
  PipedSender pipedSender=new PipedSender();
  PipedReceiver pipedReceiver=new PipedReceiver(pipedSender);
  pipedSender.start();
  pipedReceiver.start();
 }
}

//从管道输入流  读取数据的线程

class PipedReceiver extends Thread{
 private PipedInputStream in;
 public PipedReceiver(PipedSender pipedSender){
  try {
   in=new PipedInputStream(pipedSender.getPipedOutputStream());
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }

 public void run(){
  try{
   int data;
   while((data=in.read()) != -1){
    System.out.println(data);
   }
   in.close();
  }catch (Exception e) {
   // TODO: handle exception
   e.printStackTrace();
  }
 }
}

3.

package com.io.Stream;

import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;

public class Stream {

 /**
  * 怎么向文件中写Strting 又读成String
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  new Stream();
 }

 public Stream(){
  try {
   FileOutputStream out=new FileOutputStream("D:/Stream.txt",true);
   //读取我要的String
   ByteArrayInputStream in=new ByteArrayInputStream("zhou hai周省劲".getBytes());
   int len=in.available(); //获取所有的字节数目
   byte[] bytes=new byte[len];
   in.read(bytes);  //把输入流的写bytes数组中

   out.write(bytes, 0, len);
   out.close();
   in.close();

   FileInputStream fis=new FileInputStream("D:/Stream.txt");
   int len2=fis.available();
   byte byin[]=new byte[len2];
   fis.read(byin);
   System.out.println(new String(byin));

   fis.close();
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }

}

4.

package com.io.Stream;
import java.io.*;
public class ByteArrayOutputStreamTester {

 /**
  * byteArrayOutputStream的运用 //字节数据输出流
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  ByteArrayOutputStream out=new ByteArrayOutputStream();
  try {
   out.write("周海".getBytes("utf-8")); //用uft-8的编码方式写到数组中

   byte[] buff=out.toByteArray();   //获取字节数组
   out.close();

   ByteArrayInputStream in=new ByteArrayInputStream(buff);
   int len=in.available();
   byte[] buffin=new byte[len];
   in.read(buffin);   //把 buff字节数组的数据读入到 buffiin中
   in.close();
   System.out.println(new String(buffin,"utf-8"));

  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

 }

}

5.

package com.io.Stream;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;

public class FormatDateIO {

 /**
  * 可以读取基本的数据类型的IO
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  try {
   FileOutputStream out1=new FileOutputStream("D:/Zhou.txt");
   BufferedOutputStream out2=new BufferedOutputStream(out1);
   DataOutputStream out=new DataOutputStream(out2);

   out.writeByte(-12);
   out.writeLong(12);
   out.writeChar('1');
   out.writeUTF("周");

   out.close();

   InputStream in1=new FileInputStream("D:/Zhou.txt");
   BufferedInputStream in2=new BufferedInputStream(in1);
   DataInputStream in=new DataInputStream(in2);
   System.out.println(in.read() +"  "+in.readLong()+"  "+in.readChar()+"  " +in.readUTF());

   in.close();
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

  }

}