Demo Prepared Statement Set Blob : PreparedStatement « Database SQL JDBC « Java






Demo Prepared Statement Set Blob

 
/*

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();
    }
  }
}
           
         
  








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