Learn Spring Framework the hard way (1) First Spring Framework app without maven

 1. Download Spring Framework

Official distribution of Spring Framework can be found at 

https://repo.spring.io/ui/native/release/org/springframework/spring/

e.g. spring-5.3.20-dist.zip

$ unzip spring-5.3.20-dist.zip

$ ls  spring-framework-5.3.20/libs | head -10

spring-aop-5.3.20.jar

spring-aop-5.3.20-javadoc.jar

spring-aop-5.3.20-sources.jar

spring-aspects-5.3.20.jar

spring-aspects-5.3.20-javadoc.jar

spring-aspects-5.3.20-sources.jar

spring-beans-5.3.20.jar

spring-beans-5.3.20-javadoc.jar

spring-beans-5.3.20-sources.jar

spring-context-5.3.20.jar

There are 3 jar files for each package, we only need one of them. Copy the needed jar files into another folder "lib" for use.

$ ls lib/ | head -10

spring-aop-5.3.20.jar

spring-aspects-5.3.20.jar

spring-beans-5.3.20.jar

spring-context-5.3.20.jar

spring-context-indexer-5.3.20.jar

spring-context-support-5.3.20.jar

spring-core-5.3.20.jar

spring-expression-5.3.20.jar

spring-instrument-5.3.20.jar

spring-jcl-5.3.20.jar

2. Create an App class

$ cat App.java

public class App

{

    public void run(){

        System.out.println("App is running...");

    }

}

3. Create beans.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xmlns:context="http://www.springframework.org/schema/context"

    xsi:schemaLocation="

    http://www.springframework.org/schema/beans

    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

    http://www.springframework.org/schema/context

    http://www.springframework.org/schema/context/spring-context-3.0.xsd">

 <!-- We can define our beans here -->

 <bean id="app" class="App"></bean>

</beans>

4. Create a bean by IoC

$ cat Test.java

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {

    public static void main(String[] args){

       ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");

       App app = (App)context.getBean("app");

       app.run();

    }

}

$ ls -F

App.java  beans.xml  lib/  Test.java

5 Compile

$ javac App.java

$ javac -cp './lib/*':. Test.java

6 Run it

$ java -cp './lib/*':. Test

App is running...