Spring Boot YAML configuration for a list of strings

Spring Boot YAML configuration for a list of strings

In YAML configuration files for Spring Boot, you can define a list of strings using YAML's list syntax. Here's how you can define a list of strings in your application.yml file:

my: stringList: - value1 - value2 - value3

In this example:

  • my is the top-level key.
  • stringList is a key under my that represents the list of strings.
  • - value1, - value2, - value3 are individual strings in the list. The hyphen (-) denotes the start of each list item.

You can then inject this list into your Spring Boot application using @Value annotation in your Java code:

import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.context.properties.EnableConfigurationProperties; import org.springframework.context.annotation.Configuration; import java.util.List; @Configuration @EnableConfigurationProperties public class MyApplication { @Value("${my.stringList}") private List<String> stringList; public static void main(String[] args) { SpringApplication.run(MyApplication.class, args); } // Use stringList as needed }

In this example, stringList will contain the list of strings defined in the application.yml file. You can then use this list in your application logic as needed.

Examples

  1. Spring Boot YAML configuration for a list of strings

    Description: Configuring a list of strings in YAML for a Spring Boot application.

    Code:

    # application.yml myapp: stringList: - value1 - value2 - value3

    Define a list of strings (stringList) under the myapp property in application.yml.

  2. Spring Boot YAML configuration for an empty list

    Description: Specifying an empty list in YAML for Spring Boot configuration.

    Code:

    # application.yml myapp: emptyList: []

    Use empty brackets [] to denote an empty list (emptyList) under the myapp property in application.yml.

  3. Spring Boot YAML configuration for a list of integers

    Description: Configuring a list of integers in YAML for a Spring Boot application.

    Code:

    # application.yml myapp: integerList: - 1 - 2 - 3

    Define a list of integers (integerList) under the myapp property in application.yml.

  4. Spring Boot YAML configuration for a nested list of strings

    Description: Configuring a nested list of strings in YAML for Spring Boot.

    Code:

    # application.yml myapp: nestedList: - - value1 - value2 - - value3 - value4

    Define a nested list (nestedList) of strings under the myapp property in application.yml.

  5. Spring Boot YAML configuration for a list with multiline strings

    Description: Handling multiline strings in a list within YAML for Spring Boot.

    Code:

    # application.yml myapp: multilineList: - | This is a multiline string with line breaks - | Another multiline string

    Use the pipe (|) character followed by multiline strings under the multilineList property in application.yml.

  6. Spring Boot YAML configuration for a list of enums

    Description: Defining a list of enums in YAML for Spring Boot configuration.

    Code:

    public enum Status { ACTIVE, INACTIVE, PENDING } 
    # application.yml myapp: enumList: - ACTIVE - INACTIVE - PENDING

    Define an enum type (Status in this example) and configure a list (enumList) of enum values in application.yml.

  7. Spring Boot YAML configuration for a list of objects

    Description: Configuring a list of objects in YAML for Spring Boot.

    Code:

    public class Item { private String name; private int quantity; // Getters and setters } 
    # application.yml myapp: items: - name: Item1 quantity: 5 - name: Item2 quantity: 10

    Define a class (Item in this example) with properties (name and quantity) and configure a list of objects (items) in application.yml.

  8. Spring Boot YAML configuration for a list of lists

    Description: Configuring a list containing lists in YAML for Spring Boot.

    Code:

    # application.yml myapp: listOfLists: - [value1, value2] - [value3, value4, value5]

    Define a list (listOfLists) containing sub-lists of strings under the myapp property in application.yml.

  9. Spring Boot YAML configuration for a list with comments

    Description: Adding comments to a list in YAML for Spring Boot configuration.

    Code:

    # application.yml myapp: # List of items itemList: # This is a list of items - item1 # First item - item2 # Second item

    Use # to add comments to describe the list (itemList) and its elements in application.yml.

  10. Spring Boot YAML configuration for a dynamic list size

    Description: Handling a dynamically sized list in YAML for Spring Boot configuration.

    Code:

    # application.yml myapp: dynamicList: - value1 - value2 # Additional values can be added dynamically

    Define a list (dynamicList) of strings in application.yml without specifying a fixed size, allowing for dynamic addition of values.

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