JavaSE-18.2.6【案例-字符缓冲流复制Java文件（基础版实现、基于字符缓冲流特有功能的改进版实现）】 

 1 package day9.lesson2;
 2 
 3 import java.io.*;
 4 
 5 /*
 6 2.10 案例-字符缓冲流复制Java文件
 7  */
 8 public class CopyJavaDemo03 {
 9     public static void main(String[] args) throws IOException {
10         BufferedReader br = new BufferedReader(new FileReader("stage2\\src\\day9\\lesson2\\StringDemo.java"));
11         BufferedWriter bw = new BufferedWriter(new FileWriter("stage2\\day9_lesson2_copy\\CopyStringDemo03.java"));
12 
13         //方式1
14         /*int ch;
15         while ((ch=br.read()) != -1){
16             bw.write(ch);
17         }*/
18 
19         //方式2
20         char[] chars = new char[1024];
21         int len;
22         while ((len=br.read(chars)) != -1){
23 //            bw.write(chars);
24             bw.write(chars, 0, len);
25         }
26 
27         bw.close();
28         br.close();
29     }
30 }
 1 package day9.lesson2;
 2 
 3 import com.sun.xml.internal.ws.api.ha.StickyFeature;
 4 
 5 import java.io.*;
 6 
 7 /*
 8 2.12 案例-使用字符缓冲流特有功能复制Java文件
 9  */
10 public class CopyJavaDemo04 {
11     public static void main(String[] args) throws IOException {
12         BufferedReader br = new BufferedReader(new FileReader("stage2\\src\\day9\\lesson2\\StringDemo.java"));
13         BufferedWriter bw = new BufferedWriter(new FileWriter("stage2\\day9_lesson2_copy\\CopyStringDemo04.java"));
14 
15         String line;
16         while ((line=br.readLine()) != null){
17             bw.write(line);
18             bw.newLine(); //手动换行,因为.readLine()不读取原文件的换行符等，只读取每行的内容
19             bw.flush();
20         }
21 
22         bw.close();
23         br.close();
24     }
25 }

 

posted @ 2021-06-07 10:04  yub4by  阅读(55)  评论(0)    收藏  举报