How to get the current value of a particular row from a database using JDBC?

JDBCJava 8Object Oriented ProgrammingProgramming

The refreshRow() method of the ResultSet interface refreshes the current row with the most recent value in the database.

rs.refreshRow()

Assume we have a table named cricketers_data with 7 records as shown below:

+----+------------+------------+---------------+----------------+-------------+
| ID | First_Name | Last_Name  | Year_Of_Birth | Place_Of_Birth | Country     |
+----+------------+------------+---------------+----------------+-------------+
| 1  | Shikhar    | Dhawan     | 1981-12-05    | Delhi          | India       |
| 2  | Jonathan   | Trott      | 1981-04-22    | CapeTown       | SouthAfrica |
| 3  | Lumara     | Sangakkara | 1977-10-27    | Matale         | Srilanka    |
| 4  | Virat      | Kohli      | 1988-11-05    | Mumbai         | India       |
| 5  | Rohit      | Sharma     | 1987-04-30    | Nagpur         | India       |
| 6  | Ravindra   | Jadeja     | 1988-12-06    | Nagpur         | India       |
| 7  | James      | Anderson   | 1982-06-30    | Burnely        | England     |
+----+------------+------------+---------------+----------------+-------------+

Following JDBC program updates the contents of the table and retrieves the new values using the refreshRow() method.

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class ResultSet_CurrentValue {
   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/mydatabase";
      Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
      System.out.println("Connection established......");
      con.setAutoCommit(false);
      //Creating a Statement object
      Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,       ResultSet.CONCUR_UPDATABLE);
      //Query to retrieve the contents of the employee_data table
      String query = "select * from Cricketers_Data";
      //Executing the query
      ResultSet rs = stmt.executeQuery(query);
      rs.absolute(4);
      System.out.print("id: "+rs.getInt(1)+", ");
      System.out.print("First name: "+rs.getString(2)+", ");
      System.out.print("Last name: "+rs.getString(3)+", ");
      System.out.print("Year of birth: "+rs.getDate(4)+", ");
      System.out.print("Place of birth: "+rs.getString(5)+", ");
      System.out.print("Country: "+rs.getString(6));
      System.out.println(" ");
      rs.absolute(4);
      rs.updateString("Place_Of_Birth", "Delhi");
      rs.refreshRow();
      rs.absolute(4);
      System.out.print("id: "+rs.getInt(1)+", ");
      System.out.print("First name: "+rs.getString(2)+", ");
      System.out.print("Last name: "+rs.getString(3)+", ");
      System.out.print("Year of birth: "+rs.getDate(4)+", ");
      System.out.print("Place of birth: "+rs.getString(5)+", ");
      System.out.print("Country: "+rs.getString(6));
      System.out.println(" ");
      con.commit();
      rs.close();
      stmt.close();
   }
}

Output

Connection established......
id: 4, First name: Virat, Last name: Kohli, Year of birth: 1988-11-05, Place of birth: Mumbai, Country: India
id: 4, First name: Virat, Last name: Kohli, Year of birth: 1988-11-05, Place of birth: Delhi, Country: India
raja
Published on 02-Apr-2019 13:06:17
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