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武林网。