io之DataStream

package com.laien.io;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * 节点流:可以跟文件直接关联,如：FileOutputStream
 * 过滤流:用以包装节点流,如：DataOutputStream,BufferedOutputStream
 * 
 * @author Administrator
 *
 */
public class DataStreamTest {
	public static void main(String[] args) throws IOException {

		DataOutputStream dos = new DataOutputStream(new BufferedOutputStream(
				new FileOutputStream("d:/data.txt")));
		byte b = 3;
		int i = 12;

		char ch = 'c';
		float f = 3.14f;

		// 写成二进制流
		dos.writeByte(b);
		dos.writeInt(i);
		dos.writeChar(ch);
		dos.writeFloat(f);

		dos.close();

		/***** 读数据 *********/
		DataInputStream dis = new DataInputStream(new BufferedInputStream(
				new FileInputStream("d:/data.txt")));
		
		
		//与写数据的顺序要一致		
		System.out.println(dis.readByte());
		System.out.println(dis.readInt());
		System.out.println(dis.readChar());
		System.out.println(dis.readFloat());
		
		dis.close();
	}

}