JAVA - 文件切分存储 - FileInputStream 流形式

package stream;
import java.io.*;
/**
* @author*/
public class TestStream {
public static void main(String[] args) throws IOException {
// *********************** read
File file = new File("D:/stream/note.txt");
FileInputStream fileInputStream = null;
try {
fileInputStream = new FileInputStream(file);
long length = file.length();
int size = 3*1024;
byte[] bytes = new byte[size];
int count = 0;
if (length<=size) {
// 一次存储
myWrite(fileInputStream,bytes,0,size,0);
} else {
// 分段存储
for (long i = length; i > 0; i--) {
if (i % size==0) {
count++;
myWrite(fileInputStream,bytes,0,size,count);
}
if (i == 1 && length % size!=0){
// 处理剩余的 。
size = (int) (length - size*count);
bytes = new byte[size];
count++;
myWrite(fileInputStream,bytes,0,size,count);
}
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
fileInputStream.close();
}
}
public static void myWrite(FileInputStream fileInputStream,byte[] bytes,int index,int size,int count) throws IOException {
fileInputStream.read(bytes, index, size);
File wroteFile = new File("D:/stream/wrote-"+count+".txt");
wroteFile.delete();
FileOutputStream fileOutputStream = new FileOutputStream(wroteFile);
fileOutputStream.write(bytes);
}
}