在整個IO包中计螺，打印流是輸出信息最方便的類雕拼。

PrintStream(字節(jié)打印流)和PrintWriter(字符打印流)
提供了一系列重載的print和println方法琅束，用于多種數(shù)據(jù)類型的輸出
PrintStream和PrintWriter的輸出不會拋出異常
PrintStream和PrintWriter有自動flush功能
System.out返回的是PrintStream的實例

package com.atguigu.java;

import java.io.DataInputStream;
import java.io.DataOutput;
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 javax.xml.crypto.Data;

import org.junit.Test;

public class TestOtherStream {

    @Test
    public void testData1(){
        DataInputStream dis = null;
        try{
            dis = new DataInputStream(new FileInputStream(new File("Data.txt")));
//          String str;
//          while((str = dis.readLine()) != null){
//              System.out.println(str);
//          }
//          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();
            System.out.println(str);
            boolean b = dis.readBoolean();
            System.out.println(b);
            long l = dis.readLong();
            System.out.println(l);
                
            }catch(IOException e1){
                e1.printStackTrace();
        }finally{
            
            if(dis != null){
                try {
                    dis.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
    
    //數(shù)據(jù)流：用來處理基本數(shù)據(jù)類型纯命、String争涌、字節(jié)數(shù)組的數(shù)據(jù):DataInputStream DataOutputStream
    @Test
    public void testData(){
        DataOutputStream dos = null;
        try {
            FileOutputStream fos = new FileOutputStream("data.txt");
            dos = new DataOutputStream(fos);
            dos.writeUTF("我愛你，而你卻不知道");
            dos.writeBoolean(true);
            dos.writeLong(1233333333);
        } 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：字節(jié)流：PrintStream  字符流：PrintWriter
    @Test
    public void printStreamWriter(){
        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream(new File("print.txt"));
        } catch (Exception e) {
            e.printStackTrace();
        }
        //創(chuàng)建打印輸出流音五，設(shè)置為自動刷新模式（寫入換行符或字節(jié)'\n'時都會刷新輸出緩沖區(qū)）
        PrintStream ps = new PrintStream(fos, true);
        if(ps != null){
            System.setOut(ps);//把標準輸出（控制臺輸出）改成文件輸出
        }
        for(int i = 0; i <= 255; i++){//輸出ASCII字符
            System.out.print((char)i);
            if (i % 50 == 0) {
                System.out.println();
            }
        }
        
    }
}