Configuration Properties

import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties("app.config.car") (3)
public class CarProperties { (1)
    private String name;

    //default ctor (2)

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name; (2)
    }

    @Override
    public String toString() {
        return "CarProperties{name='" + name + "\'}";
    }
}

...
@Component
public class AppCommand implements CommandLineRunner {
    @Autowired
    private CarProperties carProperties; (1)

    public void run(String... args) throws Exception {
        System.out.println("carProperties=" + carProperties); (2)
...

***************************
APPLICATION FAILED TO START
***************************

Description:

Field carProperties in info.ejava.examples.app.config.configproperties.AppCommand required a bean
  of type 'info.ejava.examples.app.config.configproperties.properties.CarProperties' that could
  not be found.

The injection point has the following annotations:
        - @org.springframework.beans.factory.annotation.Autowired(required=true)

Action:

Consider defining a bean of type
  'info.ejava.examples.app.config.configproperties.properties.CarProperties'
  in your configuration. (1)

# application.properties
app.config.car.name=Suburban

...
@Component
public class AppCommand implements CommandLineRunner {
    @Autowired
    private CarProperties carProperties;

    public void run(String... args) throws Exception {
        System.out.println("carProperties" + carProperties);
...

$ java -jar target/appconfig-configproperties-example-*-SNAPSHOT-bootexec.jar
...
carProperties=CarProperties{name='Suburban'}

...
"properties": [
    {
      "name": "app.config.car.name",
      "type": "java.lang.String",
      "description": "Name of car with no set maximum size",
      "sourceType": "info.ejava.examples.app.config.configproperties.properties.CarProperties"
    }
...

<!-- pom.xml dependencies -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId> (1)
    <optional>true</optional> (2)
</dependency>

@ConfigurationProperties("app.config.car")
public class CarProperties {
    /**
     * Name of car with no set maximum size (1)
     */
    private String name;

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.SOURCE)
public @interface Data {

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <scope>provided</scope>
</dependency>

@ConfigurationProperties("app.config.business")
@ConstructorBinding
@Data
@Validated
public class BusinessProperties {
    @NotNull
    private final String name;
    @NotNull
    private final String streetAddress;
    @NotNull
    private final String city;
    @NotNull
    private final String state;
    @NotNull
    private final String zipCode;
    private final String notes;
}

# application.properties
app.config.business.name=Acme
app.config.business.street-address=100 Suburban Dr
app.config.business.CITY=Newark
app.config.business.State=DE
app.config.business.zip_code=19711
app.config.business.notess=This is a property name typo

$ java -jar target/appconfig-configproperties-example-*-SNAPSHOT-bootexec.jar
...
businessProperties=BusinessProperties(name=Acme, streetAddress=100 Suburban Dr,
city=Newark, state=DE, zipCode=19711, notes=null)

...
@Data
@ConstructorBinding
public class AddressProperties {
    private final String street;
    @NotNull
    private final String city;
    @NotNull
    private final String state;
    @NotNull
    private final String zip;
}

$ java -jar target/appconfig-configproperties-example-*-SNAPSHOT-bootexec.jar
...
corporationProperties=CorporationProperties(name=Acme,
   address=AddressProperties(street=null, city=Newark, state=DE, zip=19711))

$ java -jar target/appconfig-configproperties-example-*-SNAPSHOT-bootexec.jar
...
routeProperties=RouteProperties(name=Superbowl, stops=[
  AddressProperties(street=1101 Russell St, city=Baltimore, state=MD, zip=21230),
  AddressProperties(street=347 Don Shula Drive, city=Miami, state=FLA, zip=33056)
])

@Component
public class AppCommand implements CommandLineRunner {
...
    @Autowired
    private UserProperties userProps;

    public void run(String... args) throws Exception {
...
        System.out.println(userProps); (1)
        System.out.println("user.home=" + userProps.getHome()); (2)

$ java -jar target/appconfig-configproperties-example-*-SNAPSHOT-bootexec.jar
...
UserProperties(name=jim, home=/Users/jim, timezone=America/New_York)
user.home=/Users/jim

//@ConfigurationProperties("???") multiple prefixes mapped  (1)
@Data
@Validated
public class PersonProperties {
    @NotNull
    private String name;
    @NestedConfigurationProperty
    @NotNull
    private AddressProperties address;

@Component
public class AppCommand implements CommandLineRunner {
    @Autowired
    private PersonProperties ownerProps;

$ java -jar target/appconfig-configproperties-example-*-SNAPSHOT-bootexec.jar
...
PersonProperties(name=Steve Bushati, address=AddressProperties(street=null, city=Millersville, state=MD, zip=21108))

    @Bean
    @ConfigurationProperties("owner")
    public PersonProperties ownerProps() {
...
    @Bean
    @ConfigurationProperties("manager")
    public PersonProperties managerProps() {
...

@Component
public class AppCommand implements CommandLineRunner {
    @Autowired
    private PersonProperties ownerProps; (1)

package info.ejava.examples.app.config.configproperties.properties;

import org.springframework.beans.factory.annotation.Qualifier;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Qualifier
@Target({ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
public @interface Manager {
}

@Bean
@ConfigurationProperties("manager")
@Manager (1)
public PersonProperties managerProps() {
    return new PersonProperties();
}

@Autowired
private PersonProperties ownerProps;
@Autowired
@Manager (1)
private PersonProperties manager;

    @Bean
    @ConfigurationProperties("owner")
    public PersonProperties ownerProps() {
...
    @Bean
    @ConfigurationProperties("manager")
    public PersonProperties managerProps() {
...

    @Autowired
    private PersonProperties ownerProps;
    @Autowired
    private PersonProperties managerProps; (1)