Java IO

Java IO 常用操作

file to byte[]

IOUtils.toByteArray(InputStream input)
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import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.Path;

Path path = Paths.get("path/to/file");
byte[] data = Files.readAllBytes(path);
​

import java.io.RandomAccessFile;
RandomAccessFile f = new RandomAccessFile(fileName, "r");
byte[] b = new byte[(int)f.length()];
f.readFully(b);
​

byte[] array = Files.readAllBytes(new File("/path/to/file").toPath());
​

byte[] to file

FileUtils.writeByteArrayToFile(new File("pathname"), myByteArray)
​

FileOutputStream fos = new FileOutputStream("pathname");
fos.write(myByteArray);
fos.close();
​

FileOutputStream stream = new FileOutputStream(path);
try {
    stream.write(bytes);
} finally {
    stream.close();
}
​

FileUtils.writeByteArrayToFile(new File(path), bytes);

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待更新