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How to insert Binary data into a table using JDBC?
SQL databases provide a datatype named Blob (Binary Large Object) in this, you can store large binary data like images.
To store binary (stream) values into a table JDBC provides a method called setBinaryStream() in the PreparedStatement interface.
It accepts an integer representing the index of the bind variable representing the column that holds values of type BLOB, an InputStream object holding the binary data and, inserts the given data in to the specified column.
You can insert binary stream data into a table using this method as shown below −
FileInputStream fin = new FileInputStream("javafx_logo.jpg");
pstmt.setBinaryStream(3, fin);Example
Let us create a table with name tutorials_data in MySQL using the CREATE statement as shown below −
CREATE TABLE tutorials_data( Name VARCHAR(255), Type VARCHAR(50), Logo BLOB );
Following JDBC program establishes connection to MySQL and, inserts 3 records into the tutorials_data table.
As a value to the 3rd column LOGO, this program stores binary data (images from local directory) using the setBinaryStream() method of the PreparedStatement interface.
import java.io.FileInputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
public class BinaryDataToTable {
public static void main(String args[]) throws Exception {
//Registering the Driver
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//Getting the connection
String mysqlUrl = "jdbc:mysql://localhost/sampledatabase";
Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
System.out.println("Connection established......");
//Inserting values
String query = "INSERT INTO tutorials_dataa(Name, Type, Logo) VALUES (?, ?, ?)";
PreparedStatement pstmt = con.prepareStatement(query);
pstmt.setString(1, "JavaFX");
pstmt.setString(2, "Java_library");
FileInputStream fin = new FileInputStream("javafx_logo.jpg");
pstmt.setBinaryStream(3, fin);
pstmt.execute();
pstmt.setString(1, "CoffeeScript");
pstmt.setString(2, "scripting Language");
fin = new FileInputStream("coffeescript_logo.jpg");
pstmt.setBinaryStream(3, fin);
pstmt.execute();
pstmt.setString(1, "Cassandra");
pstmt.setString(2, "NoSQL database");
fin = new FileInputStream("cassandra_logo.jpg");
pstmt.setBinaryStream(3, fin);
pstmt.execute();
System.out.println("Records inserted......");
}
}Output
Connection established...... Records inserted......
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