将Blob转换为字节数组的最简单方法

Question

将Blob转换为字节数组的最简单方法是什么？我使用的是MYSQL,我希望将Blob数据类型转换为字节数组.

我用java编程语言:)

Answer 1

mySql blob类具有以下功能:

blob.getBytes

像这样用它:

//(assuming you have a ResultSet named RS)
Blob blob = rs.getBlob("SomeDatabaseField");

int blobLength = (int) blob.length();  
byte[] blobAsBytes = blob.getBytes(1, blobLength);

//release the blob and free up memory. (since JDBC 4.0)
blob.free();

Answer 2

在最简单的方法是这样的.

byte[] bytes = rs.getBytes("my_field");