黑马程序员-JAVA高级视频_IO输入与输出-20天-9(切割合并文件)

package string.test;

import java.io.*;
import java.util.Vector;

/*
* 切割文件
*/
public class SplitFile {
public static void main(String[] args) throws IOException {
// splitFile();
merge();
}

/*
* 合并文件
*/
public static void merge() throws IOException {
Vector<FileInputStream> fileInputStreams = new Vector<FileInputStream>();
for (int i = 1; i <= 7; i++) {
fileInputStreams.add(new FileInputStream("g:\\split" + i + ".rar"));
}
SequenceInputStream sis = new SequenceInputStream(fileInputStreams.elements());
FileOutputStream fos = new FileOutputStream("f:\\alipaydirect.rar");
byte[] bytes = new byte[1024 * 1024];
int len = 0;
while ((len = sis.read(bytes)) != -1) {
fos.write(bytes, 0, len);
}
sis.close();
fos.close();

}

/*
* 切割文件
*/
public static void splitFile() throws IOException {
FileInputStream fis = new FileInputStream("g:\\alipaydirect.rar");
FileOutputStream fos = null;
byte[] bytes = new byte[1024 * 1024];
int len = 0;
int count = 1;
while ((len = fis.read(bytes)) != -1) {
fos = new FileOutputStream("g:\\split" + count + ".rar");
count++;
fos.write(bytes, 0, len);
fos.flush();
fos.close();
}
fis.close();
}
}