Call Stored Procedure With No Parameters in JDBC

Java Libraries

Copy JAR files which are listed below:

mysql-connector-java-5.1.36.jar

Create Database

Create a database with the name is advancedjava. This database have 1 tables: Product table.

--
-- Table structure for table `product`
--

CREATE TABLE `product` (
  `id` int(11) NOT NULL PRIMARY KEY AUTO_INCREMENT,
  `name` varchar(250) COLLATE utf8_unicode_ci NOT NULL,
  `price` decimal(10,1) NOT NULL,
  `quantity` int(11) NOT NULL,
  `description` text COLLATE utf8_unicode_ci NOT NULL,
  `featured` tinyint(1) NOT NULL,
  `dateCreated` date NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

--
-- Dumping data for table `product`
--

INSERT INTO `product` (`name`, `price`, `quantity`, `description`, `featured`, `dateCreated`) VALUES
('laptop 1', '2.0', 5, 'Description of laptop 1', 1, '2018-03-19'),
('laptop 2', '12.0', 7, 'Description of laptop 2', 0, '2018-03-21'),
('computer 1', '4.0', 6, 'Description of computer 1', 1, '2018-03-23'),
('computer 2', '10.0', 6, 'Description of computer 2', 1, '2018-03-14'),
('computer 3', '21.0', 4, 'Description of computer 3', 0, '2018-03-26'),
('tivi 1', '17.0', 2, 'Description of tivi 1', 1, '2018-03-23'),
('tivi 2', '32.0', 8, 'Description of tivi 2', 0, '2018-03-29');

--
-- Procedures
--

DELIMITER $$
CREATE PROCEDURE findAll()
BEGIN
	SELECT * FROM product;
END $$
DELIMITER ;

Structure of Product Table

Data of Product Table

Entities Class

Create new package named entities. In this package, create new java class named Product.java as below:

Product Entity

package entities;

import java.math.BigDecimal;
import java.util.Date;

public class Product implements java.io.Serializable {

	private int id;
	private String name;
	private BigDecimal price;
	private int quantity;
	private String description;
	private boolean featured;
	private Date dateCreated;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public BigDecimal getPrice() {
		return price;
	}

	public void setPrice(BigDecimal price) {
		this.price = price;
	}

	public int getQuantity() {
		return quantity;
	}

	public void setQuantity(int quantity) {
		this.quantity = quantity;
	}

	public String getDescription() {
		return description;
	}

	public void setDescription(String description) {
		this.description = description;
	}

	public boolean isFeatured() {
		return featured;
	}

	public void setFeatured(boolean featured) {
		this.featured = featured;
	}

	public Date getDateCreated() {
		return dateCreated;
	}

	public void setDateCreated(Date dateCreated) {
		this.dateCreated = dateCreated;
	}

}

Create ConnectDatabase Class

Create new package named models. In this package, create new java class named ConnectDatabase.java as below:

package models;

import java.sql.Connection;
import java.sql.DriverManager;

public class ConnectDatabase {

	public static Connection getConnection() {
		Connection connection = null;
		try {
			Class.forName("com.mysql.jdbc.Driver");
			connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/advancedjava", "root", "123456");
		} catch (Exception e) {
			connection = null;
		}
		return connection;
	}

}

Create ProductModel Class

In models package, create new java class named ProductModel.java contains methods to interact with the database.

package models;

import entities.Product;
import java.math.BigDecimal;
import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;

public class ProductModel {

	public List<Product> findAll() {
		List<Product> products = new ArrayList<Product>();
		try {
			CallableStatement callableStatement = ConnectDatabase.getConnection().prepareCall("{call findAll()}");
			ResultSet resultSet = callableStatement.executeQuery();
			while (resultSet.next()) {
				Product product = new Product();
				product.setId(resultSet.getInt("id"));
				product.setName(resultSet.getString("name"));
				product.setPrice(resultSet.getBigDecimal("price"));
				product.setQuantity(resultSet.getInt("price"));
				product.setDescription(resultSet.getString("description"));
				product.setDateCreated(resultSet.getDate("dateCreated"));
				product.setFeatured(resultSet.getBoolean("featured"));
				products.add(product);
			}
		} catch (Exception e) {
			products = null;
		}
		return products;
	}

}

Structure of Project

Run Application

Create new package named demo. In this package, create new java class named Main.java as below:

package demo;

import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import entities.Product;
import models.ProductModel;

public class Main {

	public static void main(String[] args) {

		SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MM/dd/yyyy");
		ProductModel productModel = new ProductModel();

		System.out.println("Call findAll Method");
		for (Product product : productModel.findAll()) {
			System.out.println("Id: " + product.getId());
			System.out.println("Name: " + product.getName());
			System.out.println("Price: " + product.getPrice());
			System.out.println("Quantity: " + product.getQuantity());
			System.out.println("Description: " + product.getDescription());
			System.out.println("Date Created: " + simpleDateFormat.format(product.getDateCreated()));
			System.out.println("Featured: " + product.isFeatured());
			System.out.println("==========================================");
		}


	}

}

Output

Call findAll Method
Id: 1
Name: Name 1
Price: 2.0
Quantity: 2
Description: Description of product 1
Date Created: 03/19/2018
Featured: true
==========================================
Id: 2
Name: Name 2
Price: 5.5
Quantity: 5
Description: Description of product 2
Date Created: 03/20/2018
Featured: false
==========================================
Id: 3
Name: Name 3
Price: 12.0
Quantity: 12
Description: Description of product 3
Date Created: 03/21/2018
Featured: false
==========================================