Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

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Okay, so today I wanted to mess around with something called “training bag policy” in Spring. I’d heard about it, but honestly, I hadn’t ever actually tried it myself. So, I figured, why not? Let’s dive in and see what happens.

Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

Getting Started

First things first, I needed a basic Spring Boot project. I just whipped up a simple one – you know, the usual: a couple of controllers, some services, the standard stuff. Nothing fancy, just enough to have something to work with.

Then I created the configuration for a training bean.

I made a simple configuration class.

java

@Configuration

Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

public class TrainingBagConfig {

Then I created the bean.

java

@Configuration

public class TrainingBagConfig {

Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

@Bean

public TrainingBag trainingBag(){

return new TrainingBag();

Then I created a very simple pojo, using lombok to quickly generate.

java

Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

@Data

@NoArgsConstructor

@AllArgsConstructor

public class TrainingBag {

private String name;

Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

private String color;

private Integer size;

private List strings;

The Experiment

So, the whole point was to play with different configurations.I started exploring.I try to configure it in the configuration class.

java

Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

@Bean

public TrainingBag trainingBag(){

TrainingBag trainingBag = new TrainingBag();

*(“red”);

*(“My Red Bag”);

Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

*(52);

return trainingBag;

I ran it and boom it * name is “My Red Bag”,the color is red,and the size is 52.

The I tried another way.I removed the above code and add @ConfigurationProperties

java

Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

@Configuration

public class TrainingBagConfig {

@Bean

@ConfigurationProperties(prefix = “training”)

public TrainingBag trainingBag(){

Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

return new TrainingBag();

Then, I add some config in *.

yaml

training:

name: “My Blue Bag”

Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

color: blue

size: 48

strings:

– a

– b

Know Before You Go: Spring Training Bag Policy Explained! (Easy Tips)

– c

I ran it and It also * I knew how to use it.

Wrapping Up

It’s worked for my experiment. It’s a simple function, and a good way to try something I never used before. That’s the beauty of just trying things out – you learn by doing!

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