Java--IO--PrintStream和PrintWriter打印流

1. PrintStream和PrintWriter打印流介绍：
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   2. 

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2. PrintWriter和PrintStream打印流的使用

   1. PrintStream：

      1. package com.model.io.outputstream.printstream;
         
         import java.io.FileNotFoundException;
         import java.io.FileOutputStream;
         import java.io.IOException;
         import java.io.PrintStream;
         
         /**
          * @Description:测试类
          * @Author: 张紫韩
          * @Crete 2021/6/19 12:06
          */
         public class PrintStreamDemo01 {
             public static void main(String[] args) throws IOException {
                 //打印流指定打印的位置
                 String filePath="D:\\qq\\IDEA\\IdeaProjects\\java_mianshi_test\\mianshi_io\\src\\main\\resources\\File\\PrintStreamDemo01.txt";
                //创建一个打印流对象
                 PrintStream printStream = new PrintStream(filePath);
                 //执行打印
                 printStream.println("aaaaaa");
                 printStream.close();
         
                 PrintStream printStream1=System.out;  //System.in的底层就是一个PrintStream打印流对象，且打印的位置是控制台
                 printStream1.write("张紫韩".getBytes());
                 printStream1.write("张紫韩".getBytes());
                 printStream1.close();
         
                 //为System.out指定打印位置：改变打印的位置：
                 System.setOut(new PrintStream(filePath));
                 System.out.println("张紫韩");
         
         
             }
         }

   2.  PrintWriter的使用：

      1.  

         package com.model.io.writer.printwriter;
         
         import java.io.*;
         
         /**
          * @Description:测试类
          * @Author: 张紫韩
          * @Crete 2021/6/19 13:43
          *
          * 演示：PrintWriter字符打印流的使用
          */
         public class PrintWriterDemo01 {
             public static void main(String[] args) throws IOException {
         
                 String filePath="D:\\qq\\IDEA\\IdeaProjects\\java_mianshi_test\\mianshi_io\\src\\main\\resources\\File\\PrintWriterDemo01.txt";
                 PrintWriter printWriter = new PrintWriter(new FileWriter(filePath,true));
                 printWriter.write("张紫韩");
                 printWriter.close();
         
         
                 PrintWriter printWriter1 = new PrintWriter(System.out);
                 printWriter1.write("张紫韩////");
                 printWriter1.close();
         
                 System.setOut(new PrintStream(filePath));
                 System.out.println("张紫韩0000");
         
             }
         }