文件的切割：创建一个输入流来读取文件，创建多个输出流来写碎片文件，写完一个输出流就关一个。
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class IoDemo {
public static void main(String[] args) throws IOException {
File f = new File("e:/lishuai.txt");
cutmethord(f);
}
private static void cutmethord(File f) throws IOException {
// TODO Auto-generated method stub
FileInputStream fi = new FileInputStream(f);
int len = 0;
// 定义碎片文件名
int count = 1;
byte[] b = new byte[1024];
while ((len = fi.read(b)) != -1) {
FileOutputStream fo = new FileOutputStream("e:/"+count+".txt");
fo.write(b, 0, len);
fo.close();
count++;
}
fi.close();
}
}
文件的关闭：文件的合并与文件的切割思想相反，先创建一个输出流对象，之后遍历碎片文件，边读边写。
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class IoDemo {
public static void main(String[] args) throws IOException {
methord();
}
private static void methord() throws IOException {
// TODO Auto-generated method stub
FileOutputStream fo = new FileOutputStream("e:/lishuai.txt");
for (int i = 1; i <= 3; i++) {
FileInputStream fi = new FileInputStream("e:/" + i + ".txt");
int len = 0;
byte[] b = new byte[1024];
while ((len = fi.read(b)) != -1) {
fo.write(b, 0, len);
}
fi.close();
}
fo.close();
}
}
