java - 在Java中将InputStream转换为字节数组(Convert InputStream to byte array in Java)

Question

如何将整个InputStream读入字节数组？

  ask by JGC translate from so

Answer 1

You can use Apache Commons IO to handle this and similar tasks.

(您可以使用Apache Commons IO处理此任务和类似任务。)

The IOUtils type has a static method to read an InputStream and return a byte[] .

(IOUtils类型具有静态方法来读取InputStream并返回byte[] 。)

InputStream is;
byte[] bytes = IOUtils.toByteArray(is);

Internally this creates a ByteArrayOutputStream and copies the bytes to the output, then calls toByteArray() .

(在内部，这将创建一个ByteArrayOutputStream并将字节复制到输出，然后调用toByteArray() 。)

It handles large files by copying the bytes in blocks of 4KiB.

(它通过复制4KiB块中的字节来处理大型文件。)