package fifteen;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;

import org.junit.Test;

public class TestOtherStream1 {
	@Test
	public void testData1(){
		DataInputStream dis = null;
		try{
			dis = new DataInputStream(new FileInputStream(new File("data.txt")));
//			byte[] b = new byte[20];
//			int len;
//			while((len = dis.read(b)) != -1){
//				System.out.println(new String(b,0,len));
//			}
			String str = dis.readUTF();//读字符串
			System.out.println(str);
			boolean b = dis.readBoolean();
			System.out.println(b);
			long l = dis.readLong();
			System.out.println(l);
			
			
		}catch(Exception e){
			e.printStackTrace();
		}finally{
			if(dis != null){
				try {
					dis.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
	}
	
	//数据流：用来处理基本数据类型、String、字节数组的数据:DataInputStream DataOutputStream
	@Test 
	public void testData(){
		DataOutputStream dos = null;
		try {
			FileOutputStream fos = new FileOutputStream("data.txt");
			dos = new DataOutputStream(fos);
			
			dos.writeUTF("我爱你，而你却不知道！");
			dos.writeBoolean(true);
			dos.writeLong(1432522344);
		}catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			if(dos != null){
				try {
					dos.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				
			}
		}
		
	}
	
	// 打印流：字节流：PrintStream 字符流：PrintWriter
	@Test
	public void printStreamWriter() {
		FileOutputStream fos = null;
		try {
			fos = new FileOutputStream(new File("print.txt"));
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
		// 创建打印输出流,设置为自动刷新模式(写入换行符或字节 '\n' 时都会刷新输出缓冲区)
		PrintStream ps = new PrintStream(fos, true);
		if (ps != null) { // 把标准输出流(控制台输出)改成文件
			System.setOut(ps);
		}
		for (int i = 0; i <= 255; i++) { // 输出ASCII字符
			System.out.print((char) i);
			if (i % 50 == 0) { // 每50个数据一行
				System.out.println(); // 换行
			}
		}
		ps.close();

	}
}