InputStream is = new FileInputStream("your_file");
byte[] b = new byte[is.available()]; //reads how much bytes are readable from file
is.read(b);//reads the file and save all read bytes into b
File file = new File("binaryFile.dat");
FileOutputStream fos = new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(fos);
DataOutputStream dos = new DataOutputStream(bos);
byte[] array1 = ...
byte[] array2 = ...
byte[] array3 = ...
dos.writeInt(array1.length);
for(byte b : array1) dos.wrtieByte(b);
dos.writeInt(array2.length);
for(byte b : array2) dos.wrtieByte(b);
dos.writeInt(array3.length);
for(byte b : array3) dos.wrtieByte(b);
然后像这样读:
File file = new File("binaryFile.dat");
FileInputStream fis = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(fis);
DataInputStream dis = new DataInputStream(bis);
byte[] array1 = new byte[dis.readInt()];
for(int i = 0; i < array1.length; i++) array1[i] = dis.readByte();
byte[] array2 = new byte[dis.readInt()];
for(int i = 0; i < array2.length; i++) array2[i] = dis.readByte();
byte[] array3 = new byte[dis.readInt()];
for(int i = 0; i < array3.length; i++) array3[i] = dis.readByte();
# 1 楼答案
您可以使用java.io.InputStream类:
希望这有帮助
# 2 楼答案
雅加达公共图书馆有一个你可以使用的图书馆。只需下载。从jakarta下载他们的jar。jar并通过添加外部jar将其添加到构建路径中
IOUtils.toByteArray(InputStream input)
# 3 楼答案
考虑使用{a1}和^{} :
然后像这样读: