2021 - 02

2021-03/spring-02/pom.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>ru.otus</groupId>
+    <artifactId>spring-02</artifactId>
+    <version>1.0</version>
+
+    <properties>
+        <maven.compiler.target>11</maven.compiler.target>
+        <maven.compiler.source>11</maven.compiler.source>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <!-- Это зависимость spring-context,
+             содержит базовую функциональность IoC -->
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-context</artifactId>
+            <version>5.3.4</version>
+        </dependency>
+    </dependencies>
+</project>

2021-03/spring-02/src/main/java/ru/otus/spring/Main.java

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+package ru.otus.spring;
+
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+import ru.otus.spring.domain.Person;
+import ru.otus.spring.service.PersonService;
+
+public class Main {
+
+    public static void main(String[] args) {
+        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("/spring-context.xml");
+        PersonService service = context.getBean(PersonService.class);
+        Person ivan = service.getByName("Ivan");
+        System.out.println("name: " + ivan.getName() + " age: " + ivan.getAge());
+
+        // Данная операция, в принципе не нужна.
+        // Мы не работаем пока что с БД, а Spring Boot сделает закрытие за нас
+        // Подробности - через пару занятий
+        context.close();
+    }
+}

2021-03/spring-02/src/main/java/ru/otus/spring/dao/PersonDao.java

@@ -0,0 +1,8 @@
+package ru.otus.spring.dao;
+
+import ru.otus.spring.domain.Person;
+
+public interface PersonDao {
+
+    Person findByName(String name);
+}

2021-03/spring-02/src/main/java/ru/otus/spring/dao/PersonDaoSimple.java

@@ -0,0 +1,10 @@
+package ru.otus.spring.dao;
+
+import ru.otus.spring.domain.Person;
+
+public class PersonDaoSimple implements PersonDao {
+
+    public Person findByName(String name) {
+        return new Person(name, 18);
+    }
+}

2021-03/spring-02/src/main/java/ru/otus/spring/domain/Person.java

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+package ru.otus.spring.domain;
+
+public class Person {
+
+    private final String name;
+    private final int age;
+
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+}

2021-03/spring-02/src/main/java/ru/otus/spring/service/PersonService.java

@@ -0,0 +1,8 @@
+package ru.otus.spring.service;
+
+import ru.otus.spring.domain.Person;
+
+public interface PersonService {
+
+    Person getByName(String name);
+}

2021-03/spring-02/src/main/java/ru/otus/spring/service/PersonServiceImpl.java

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+package ru.otus.spring.service;
+
+import ru.otus.spring.dao.PersonDao;
+import ru.otus.spring.domain.Person;
+
+public class PersonServiceImpl implements PersonService {
+
+    private final PersonDao dao;
+
+    public PersonServiceImpl(PersonDao dao) {
+        this.dao = dao;
+    }
+
+    public Person getByName(String name) {
+        return dao.findByName(name);
+    }
+}

2021-03/spring-02/src/main/resources/spring-context.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xmlns="http://www.springframework.org/schema/beans"
+       xsi:schemaLocation="http://www.springframework.org/schema/beans
+        http://www.springframework.org/schema/beans/spring-beans.xsd">
+
+    <bean id="personDao" class="ru.otus.spring.dao.PersonDaoSimple">
+    </bean>
+
+    <bean id="personService" class="ru.otus.spring.service.PersonServiceImpl">
+        <constructor-arg name="dao" ref="personDao"/>
+    </bean>
+
+</beans>