java convert inputStream to base64 string

Question

There is a way to convert inputStream to a String, and encode it to base64, right? In my function, I get InputStream param, and need to insert it into the BLOB field in my Oracl

Answer 1

The simplest way would be to use IOUtils from apache-commons to do that:

String result= IOUtils.toString(inputStream, ENCODING); 

From the documentation:

toString(byte[] input, String encoding) Gets the contents of a byte[] as a String using the specified character encoding.

After that To Encode/Decode in Base64:

// Encode 
String resultBase64Encoded = Base64.getEncoder().encodeToString(result.getBytes("utf-8"));


// Decode
byte[] asBytes = Base64.getDecoder().decode(resultBase64Encoded);
String resultAsStringAgain= String(asBytes, "utf-8")

Note: I'm assuming you use JDK 8 for the Encode/Decode part.

Apparently the OP wants just to persist an InputStream to the DB. You can do that directly using JDBC:

InputStream inputStream = ......;
String sql = "INSERT INTO TABLE_NAME(COLUMN_NAME) values (?)";
PreparedStatement statement = connection.prepareStatement(sql);
statement.setBlob(1, inputStream);
statement.executeUpdate();