java 中 byte[]、File、InputStream 互相转换详解编程语言

File file = new File("test.txt"); 
 
InputStream input = new FileInputStream(file); 
 
byte[] byt = new byte[input.available()]; 
 
input.read(byt);

byte[] byt = new byte[1024]; 
 
InputStream input = new ByteArrayInputStream(byt);

File file = new File(''); 
 
OutputStream output = new FileOutputStream(file); 
 
BufferedOutputStream bufferedOutput = new BufferedOutputStream(output); 
 
bufferedOutput.write(byt);