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Spring Boot REST API на Java.

aykononov/java-rest-api

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README.md

Spring Boot REST API на Java.

Java SE + Spring Boot + Hibernate + Oracle Database

• Java SE 11 — Платформа Java, стандартная версия 11 Java SE 11 Archive Downloads;
• Spring Boot — инструмент фреймворка Spring для написания приложений с минимальной конфигурацией (имеет встроенный контейнер сервлетов Tomcat по умолчанию);
• Spring Web — включает в себя все настройки Spring MVC и позволяет писать REST API без дополнительных настроек;
• Spring Data JPA — позволяет работать с SQL с помощью Java Persistence API, используя Spring Data и Hibernate;
• Lombok — библиотека для сокращения написания стандартного кода на java (геттеры, сеттеры и т.д.);
• OpenCSV — парсер CSV-файлов;
• Oracle Data Base — используемая БД Oracle Database Express Edition (XE) download;
• Maven — фреймворк для автоматизации сборки проектов на основе описания их структуры в файлах на языке POM (англ. Project Object Model).

Оно умеет создавать (CREATE), читать (READ), изменять (UPDATE) и удалять (DELETE) информацию в БД.

Эндпоинты:

GET http://localhost:8081/listProducts получить все продукты GET http://localhost:8081/getProductById/id= найти продукт по идентификатору GET http://localhost:8081/getProductByName/name= найти продукт по имени POST http://localhost:8081/saveProducts добавляет несколько продуктов POST http://localhost:8081/addProduct добавляет один продукт DELETE http://localhost:8081/deleteProductById/id= удалить продукт по идентификатору DELETE http://localhost:8081/removeAll - удалить все продукты 

Формат данных ответа в json.

Путь директории с файлами настраивается в конфигурационном файле приложения:

Загрузка файла стартует при появлении нового файла в указанной директории:

 upload.file = LoadIntoDB.csv 

product_id, product_name, price_id, price, price_date 1,product1,1,100.11,2020-11-30 2,product2,2,22.02,2020-11-30 3,product3,3,3.03,2020-11-30 4,product4,4,100.01,2020-11-30 1,product1,5,111.01,2020-12-01 2,product2,6,22.22,2020-12-01 3,product3,7,3.33,2020-12-01 4,product4,8,100.10,2020-12-01 

В логфайле LoadIntoDB.log отмечается факт старта обработки файла и результат с количеством обработанных записей (товаров и цен).

1. Таблица товар. Хранит название товара. Колонки: id, name. 2. Таблица цена товара. Хранит цену на товар и дату с которой цена актуальная. По каждому товару может быть несколько цен с разными датами. Колонки: id, price, date, product_id. 

Таблицы в БД создаются автоматически при старте приложения.

Скрипт для создания структуры БД .

/* таблица Продукты */ DROP TABLE products PURGE; / CREATE TABLE products ( id NUMBER(10,0) NOT NULL, name VARCHAR2(255), PRIMARY KEY (id) ); / /* таблица Цены */ DROP TABLE prices PURGE; / CREATE TABLE prices ( id NUMBER(10,0) NOT NULL, price NUMBER, pdate DATE, product_id NUMBER(10,0), PRIMARY KEY (id), CONSTRAINT FK_PRODUCT_ID FOREIGN KEY (PRODUCT_ID) REFERENCES PRODUCTS (ID) ); / /* проверка */ SELECT * FROM products pd JOIN prices pr ON pd.id = pr.product_id ORDER BY pr.id; / 

Также прилагаю файл со скриптами для создания необходимых сущностей. ScriptDB.sql

Используйте shell, перейдите в корневой каталог проекта (где находится файл pom.xml) и введите команды:

mvn clean package cd target 

В командной строке выполните команду:

java -jar demo-0.0.1-SNAPSHOT.jar 

• GET http://localhost:8081/listProducts — получить все продукты
• GET http://localhost:8081/getProductById/id=4 — найти продукт по идентификатору
• GET http://localhost:8081/getProductByName/name=product4 — найти продукт по имени
• DELETE http://localhost:8081/deleteProductById/id=4 — удалить продукт по идентификатору
• POST http://localhost:8081/addProduct — добавляет один продукт

< "id": 4, "name": "product4", "prices": [ < "id": 4, "price": 111.11, "pdate": "2020-12-17", "productId": 4 > ] >

• DELETE http://localhost:8081/removeAll — удалить все продукты
• POST http://localhost:8081/saveProducts — добавляет несколько продуктов

[ < "id": 1, "name": "product1", "prices": [ < "id": 1, "price": 100.11, "pdate": "2020-11-30", "productId": 1 > ] >, < "id": 2, "name": "product2", "prices": [ < "id": 2, "price": 22.02, "pdate": "2020-11-30", "productId": 2 > ] >, < "id": 3, "name": "product3", "prices": [ < "id": 3, "price": 3.03, "pdate": "2020-11-30", "productId": 3 > ] > ]

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java-rest-api

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