如下所示：

package copy;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;public class FileCopy {public static void main(String[] args) throws IOException {// 第一种: 使用FileReader和FileWrite,一次读取一个字符 FileReader fr = new FileReader("D:\\a.txt"); FileWriter fw = new FileWriter("D:\\b.txt"); int ch; while((ch = fr.read()) != -1) { fw.write(ch); } fw.close(); fr.close();// 第二种: 使用FileReader和FileWrite,一次读取一个字符数组 FileReader fr = new FileReader("D:\\a.txt"); FileWriter fw = new FileWriter("D:\\b.txt"); char[] chs = new char[1024]; int len; while((len = fr.read(chs)) != -1) { fw.write(chs, 0, len); } fw.close(); fr.close();// 第三种: 使用FileOutputStream和FileInputStream,一次读取一个字节 FileInputStream fis = new FileInputStream("D:\\a.txt"); FileOutputStream fos = new FileOutputStream("D:\\b.txt"); int ch; while((ch = fis.read()) != -1) { fos.write(ch); } fos.close(); fis.close();// 第四种: 使用FileOutputStream和FileInputStream,一次读取一个字节数组 FileInputStream fis = new FileInputStream("D:\\a.txt"); FileOutputStream fos = new FileOutputStream("D:\\b.txt"); int ch; byte[] by = new byte[1024]; while((ch = fis.read(by)) != -1) { fos.write(by, 0, ch); } fos.close(); fis.close();// 第五种: 使用BufferedReader和BufferedWriter,一次读取一行 BufferedReader br = new BufferedReader(new FileReader("D:\\a.txt")); BufferedWriter bw = new BufferedWriter(new FileWriter("D:\\b.txt")); String line; while((line = br.readLine()) != null) { bw.write(line); bw.newLine(); bw.flush(); } bw.close(); br.close();// 第六种: 使用高效缓冲流,BufferedInputStream和BufferedOutputStream,一次读取一个字节 BufferedInputStream bis = new BufferedInputStream(new FileInputStream("D:\\a.txt")); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("D:\\b.txt")); int ch; while((ch = bis.read()) != -1) { bos.write(ch); } bos.close(); bis.close();// 第七种: 使用高效缓冲流,BufferedInputStream和BufferedOutputStream,一次读取一个字节数组 BufferedInputStream bis = new BufferedInputStream(new FileInputStream("D:\\a.txt")); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("D:\\b.txt")); int ch; byte[] by = new byte[1024]; while((ch = bis.read(by)) != -1) { bos.write(by, 0, ch); } bos.close(); bis.close();}}

以上这篇基于java文本复制的7种方式总结就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。