JDBC Type 4 Driver 1.1 Programmer's Reference

PreparedStatement ps = conn.prepareStatement("insert

into myTable (myBlobColumn) values (?)");

ps.setBinaryStream(1, inputBinary, length_of_data);

ps.executeUpdate();

The Type 4 driver reads the data from InputStream and writes the data to the LOB table.

The Type 4 driver substitutes the next-available data locator for the parameter of the BLOB

column in the table.

Inserting a Blob Object by Using the setBlob Method

Your JDBC application cannot directly instantiate a Blob object. To perform an equivalent

operation:

Obtain a Blob object by using the getBlob method of the ResultSet interface.1.

Insert the Blob object into another row by using the setBlob method of the

PreparedStatement interface.

In this situation, the Type 4 driver generates a new data locator and copies the contents of the

source Blob into the new Blob object when the application issues the setBlob method of

the PreparedStatement interface.

Reading Binary Data from a BLOB Column

To read binary data from the BLOB column, use the Blob interface or InputStream.

Using the Blob interface:

// Obtain the Blob from ResultSet

Blob myBlob = rs.getBlob("myBlobColumn");

// Obtain the input stream to read Blob data

InputStream is = myBlob.getBinaryStream();

// read Blob data using the InputStream

byte[] myBlobData;

myBlobData = new byte[length];

is.read(myBlobData, offset, length);

Using InputStream:

// obtain the InputStream from ResultSet

InputStream is = rs.getBinaryStream("myBlobColumn");

// read Blob data using the InputStream

byte[] myBlobData;

myBlobData = new byte[length];

is.read(myBlobData, offset, length);