Spring Core 0 --> 1

Learning Log

• 30 September 2025 → Completed Setter Injection using Spring XML configuration.
• 1 October 2025 → Completed Constructor Injection, explored p-schema & c-schema, and resolved ambiguity issues with constructor-arg order.
• 2 October 2025 → Completed Bean LifeCycle, explored 3 method of Configuring Bean Lifecycle:- Using XML Config, Using Interface( InitializingBean, Disposable Bean ).
• 3 October 2025 → Completed AutoWiring covered byName, byType, constructor and @autowired annotation.
• 4 October 2025 → Completed Standalone Collection covered.
• 5 October 2025 → Completed Stereotype Annotation, SingleTon, Bean Scope, Spring expression language covered.
• 6 October 2025 → Completed Spring JDBC covering......
• 13 October 2025 → After a long break( due to interviews ) Spring JDBC started implementation......
• 21 October 2025 → Enjoyed Diwali Spring JDBC started implementation......
• 22 October 2025 → Spring JDBC implemented basic jdbc CRUD operation...

  PLACED IN CAPGEMINI

• 12 November 2025 → Row Mapper and ORM
• 18 November 2025 → Hibernate
• 19 November 2025 → Spring Hibernate
• 20 November 2025 → MVC
• 21 November 2025 → MVC- First understanding servlet
• 22 November 2025 → MVC- Completed

  Now we begin our journey with Spring Boot. Let’s stop here

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What I Did

• Created a Maven project
• Added spring-context dependency
• Implemented a Student POJO bean
• Wired the bean in config.xml using both setter and constructor injection
• Explored p-schema and c-schema for cleaner XML configuration
• Learned about ambiguity handling in constructor arguments
• Loaded Spring context in App.java and used the bean successfully

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Project Structure

Spring-Practice  
├─ src/main/java/org/example  
│  ├─ App.java  
│  └─ Student.java  
├─ src/main/resources  
│  └─ config.xml  
└─ pom.xml

Note: config.xml must be inside src/main/resources so it is available on the classpath.

Run

• From IDE: run App.main()

• mvn clean compilemvn -Dexec.mainClass="org.example.App" exec:java # if exec plugin configured

Quick tips

• Ensure target/classes/config.xml exists after build.

• If Spring complains about parsing config.xml, check file location, XML syntax, and encoding (use UTF-8 without BOM).

📚 Source

Currently learning from this YouTube playlist:Spring Framework Tutorial - Telusko