Apr 292016

ADM

How to update a record using JDBC PreparedStatement

  • April 29 2016
  • ADM

 

 

How to update a record using JDBC PreparedStatement - jdbc

 

In this tutorial will try to update records from a database table using JDBC PreparedStatement. For more resources about JDBC please follow the links from references section.

Example

To be easier for this tutorial I will copy all necessary code from the tutorials listed on reference section.

package com.admfactory.db;

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

public class JDBCUpdateRecord {

    private static Connection connect() {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            return DriverManager.getConnection("jdbc:mysql://localhost:3306/admfactory.com", "root", "");
        } catch (Exception e) {
            System.out.println("Failed to connect to DB.");
            e.printStackTrace();
            return null;
        }
    }

    private static void updateData(long id, String name, String email, String password, String type, Date dob) throws Exception {
        PreparedStatement statement = null;
        try {
            String query = "UPDATE `user` SET `name`= ?, `email`= ?, `password`= ?, `type`=?,`dob`=? WHERE `id`=?;";
            Connection connection = connect();
            statement = connection.prepareStatement(query);
            statement.setString(1, name);
            statement.setString(2, email);
            statement.setString(3, password);
            statement.setString(4, type);
            statement.setDate(5, dob);
            statement.setLong(6, id);
            int r = statement.executeUpdate();
            /** Check if the user was successfully updated. */
            if (r > 0) {
                System.out.println("User [" + name + ", " + email + "] was successfully updated.");
            } else {
                System.out.println("Failed to update user id " + id);
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (statement != null) {
                statement.close();
            }
        }
    }

    public static void main(String[] args) {
        try {
            System.out.println("Update one record.");
            /** Get the connection. */
            Connection connection = connect();

            if (connection != null) {
                /** update some data. */
                updateData(1, "John22 Doe22", "[email protected]", "pass22", "ADMIN", new Date(new java.util.Date().getTime()));
                System.out.println("Record updated successfully!");
                /** Close the connection. */
                connection.close();
            }
        } catch (Exception e) {
            System.out.println("Something went wrong.");
        }

    }
}

Note that the index for the statement object starts from 1.

Output

Update one record.
User [John22 Doe22, [email protected]] was successfully updated.
Record updated successfully!

Conclusion

To verify that the data was modified you can use any database editor like MySQL Workbench.

How to update a record using JDBC PreparedStatement - JDBCUpdateRecordCheck

References