复制文本文件（一般和打印流）_复制printwriter-优快云博客

本文链接：https://blog.youkuaiyun.com/zzzxzzv/article/details/48291989

本文提供了一个使用Java进行文件复制的示例代码，演示了如何使用BufferedReader和BufferedWriter来逐行读取并写入文件，同时展示了PrintWriter的用法及区别。

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package iotest;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;

public class copy3 {

   public static void main(String[] args) {
copy1();
copy2();
   }

   private static void copy2() {
       BufferedReader bReader1=new BufferedReader(new FileReader
               ("b.txt"));
       PrintWriter pWriter=new PrintWriter(new FileWriter("c.txt"),true);//加上true后为自动刷新！
       String lineString =null;
       while ((linString=bReader1.readLine())!=null) {

pWriter.println(linString);// pWriter.println()等于bw.write()+bw.newline()+bw.flush()

       }
       pWriter.close();
   }

   private static void copy1() {
   BufferedReader bReader=new BufferedReader(new FileReader
           ("b.txt"));
   BufferedWriter bWriter=new BufferedWriter(new FileWriter(
           "c.txt"));
   String linString=null;
   while ((linString=bReader.readLine())!=null) {
       bWriter.write();
       bWriter.newLine();
       bWriter.flush();
   }
   bWriter.close();
   bReader.close();
   }

}
//打印流只能操作目的地任意类型文件！