采用文件字符输入流和文件字符输出流把 Dwordatxt 复制到Ewordatxt分别采用一次读取一个字符的方式和一次读取一个字符数组的方式用java做

一次读取一个字符的方式：

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class FileCopy {

    public static void main(String[] args) {
        try (FileReader reader = new FileReader("D:\\word\\a.txt");
             FileWriter writer = new FileWriter("E:\\word\\a.txt")) {
            int ch;
            while ((ch = reader.read()) != -1) {
                writer.write(ch);
            }
            System.out.println("复制完成！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

一次读取一个字符数组的方式：

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class FileCopy {

    public static void main(String[] args) {
        try (FileReader reader = new FileReader("D:\\word\\a.txt");
             FileWriter writer = new FileWriter("E:\\word\\a.txt")) {
            char[] buffer = new char[1024];
            int len;
            while ((len = reader.read(buffer)) != -1) {
                writer.write(buffer, 0, len);
            }
            System.out.println("复制完成！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}
``