Java JDBC: Getting all lists of record using JDBC Statement Interface

In this article, we will use JDBC API to fetch all records from newly created table in MySQL database from Java application (i.e.; using Statement Interface)

 

1. Pre-requisite:

  • Java JDK 1.8.0_77
  • MySQL database 5.5.16
  • Eclipse Luna IDE 4.4.0
  • mysql-connector-java-5.1.38.jar file

 

2. Database parameters:

Let us move on and code an example to connect MySQL database from Java application to fetch all records using JDBC API. But before that, we will list down required things to connect database

  • database server IP or address (localhost)
  • sever port (3306)
  • database name (PLAYER_INFO)
  • username (root)
  • password (root@123)

Note: All bold are database values to connect MySQL database

 

3. Getting all lists of record using JDBC Statement Interface

  • As we are ready with required things to connect MySQL database from Java application
  • We can use one of the methods from Statement Interface to execute “select list of records” SQL query
    1. execute(String sqlQuery);
    2. executeUpdate(String sqlQuery);
    3. executeQuery(String sqlQuery);
  • Let us code simple example using Statement Interface

GetAllRecordUsingJDBCStatement.java

package in.bench.resources.mysql.db.example;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class GetAllRecordUsingJDBCStatement {

	public static void main(String[] args) {

		// variables
		Connection connection = null;
		Statement statement = null;
		ResultSet resultSet = null;

		// Step 1: Loading or registering MySQL JDBC driver class
		try {
			Class.forName("com.mysql.cj.jdbc.Driver");
		}
		catch(ClassNotFoundException cnfex) {
			System.out.println("Problem in loading MySQL JDBC driver");
			cnfex.printStackTrace();
		}

		// Step 2: Opening database connection
		try {

			// Step 2.A: Create and get connection using DriverManager
			connection = DriverManager.getConnection(
         "jdbc:mysql://localhost:3306/PLAYER_INFO", "root", "root@123"); 

			// Step 2.B: Creating JDBC Statement 
			statement = connection.createStatement();

			// create SQL query to insert new PLAYER info
			String sqlSelectQuery = "SELECT * FROM PLAYER";

			// Step 2.C: Executing SQL & retrieve data into ResultSet
			resultSet = statement.executeQuery(sqlSelectQuery);

			System.out.println("ID\tName\t\t\tAge\tMatches");
			System.out.println("==\t================\t===\t=======");

			// processing returned data and printing into console
			while(resultSet.next()) {
				System.out.println(resultSet.getInt(1) + "\t" + 
						resultSet.getString(2) + "\t" + 
						resultSet.getInt(3) + "\t" +
						resultSet.getInt(4));
			}
		}
		catch(SQLException sqlex){
			sqlex.printStackTrace();
		}
		finally {

			// Step 3: Closing database connection
			try {
				if(null != connection) {

					// cleanup resources, once after processing
					statement.close();

					// and then finally close connection
					connection.close();
				}
			}
			catch (SQLException sqlex) {
				sqlex.printStackTrace();
			}
		}
	}
}

Output:

ID	Name			Age	Matches
==	================	===	=======
1	Sachin Tendulkar	43	200
2	Shane Warne		44	145
3	Kevin Pietersen	        34	104
4	Shahid Afridi		36	27
5	Brian Lara		45	131
6	Graeme Smith		35	117
7	Mahela Jayawardene	37	145

 

4. Download:

 

Read Also:

 

References:

 

Happy Coding !!
Happy Learning !!

Java JDBC: Getting single record using JDBC Statement Interface
Java JDBC: Inserting a record using JDBC Statement Interface