RandomAccessData (Spring Boot API)

所有已知实现类:
ByteArrayRandomAccessData, RandomAccessDataFile
```
public interface RandomAccessData
```
Interface that provides read-only random access to some underlying data. Implementations must allow concurrent reads in a thread-safe manner.

嵌套类概要
嵌套类
修饰符和类型接口说明
static class RandomAccessData.ResourceAccess
Lock modes for accessing the underlying resource.

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`InputStream`	`getInputStream(RandomAccessData.ResourceAccess access)`	Returns an `InputStream` that can be used to read the underlying data.
`long`	`getSize()`	Returns the size of the data.
`RandomAccessData`	`getSubsection(long offset, long length)`	Returns a new `RandomAccessData` for a specific subsection of this data.

- 方法详细资料
  - getInputStream
```
InputStream getInputStream(RandomAccessData.ResourceAccess access)
                    throws IOException
```
    Returns an InputStream that can be used to read the underlying data. The caller is responsible close the underlying stream.
    参数:
    access - hint indicating how the underlying data should be accessed
    返回:
    a new input stream that can be used to read the underlying data.
    抛出:
    IOException - if the stream cannot be opened
  - getSubsection
```
RandomAccessData getSubsection(long offset,
                               long length)
```
    Returns a new RandomAccessData for a specific subsection of this data.
    参数:
    offset - the offset of the subsection
    length - the length of the subsection
    返回:
    the subsection data
  - getSize
```
long getSize()
```
    Returns the size of the data.
    返回:
    the size