如下所示：
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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 {
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// 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();
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// 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();
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// 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();
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// 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();
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// 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();
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// 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();
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// 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();
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}
}
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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服务器之家。
原文链接：http://blog.csdn.net/qq_26106607/article/details/79123496