DemoPreparedStatementSetBlob.java Source code

Introduction

Here is the source code for DemoPreparedStatementSetBlob.java

Source

/*
    
Defining the Table: Oracle and MySql
    
create table MyPictures (
   id INT PRIMARY KEY,
   name VARCHAR(0),
   photo BLOB
);
*/

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class DemoPreparedStatementSetBlob {
    public static Connection getConnection() throws Exception {
        String driver = "org.gjt.mm.mysql.Driver";
        String url = "jdbc:mysql://localhost/databaseName";
        String username = "root";
        String password = "root";
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }

    public static void main(String[] args) throws Exception {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        java.sql.Blob blob = null;
        try {
            conn = getConnection();
            // prepare blob object from an existing binary column
            pstmt = conn.prepareStatement("select photo from my_pictures where id = ?");
            pstmt.setString(1, "0001");
            rs = pstmt.executeQuery();
            rs.next();
            blob = rs.getBlob(1);

            // prepare SQL query for inserting a new row using setBlob()
            String query = "insert into blob_table(id, blob_column) values(?, ?)";
            // begin transaction
            conn.setAutoCommit(false);

            pstmt = conn.prepareStatement(query);
            pstmt.setString(1, "0002");
            pstmt.setBlob(2, blob);

            int rowCount = pstmt.executeUpdate();
            System.out.println("rowCount=" + rowCount);
            // end transaction
            conn.commit();
        } finally {
            rs.close();
            pstmt.close();
            conn.close();
        }
    }
}