How to declare multiple object with same class but using different properties in spring boot

Question

I want declare multiple object using same class but different properties in Spring boot annotation

application.properties

test1.name=Ken
test2.name=Anthony

the code example

@Component
public class People {
    private String name;
    public String getName() {
        return this.name;
    }
}

@SpringBootApplication
public class Application {
    @AutoWired
    public People man1;

    @AutoWired
    public People man2;

    System.out.println(man1.getName());
    System.out.println(man2.getName());
} 

I try to add @ConfigurationProperties(prefix="test1") before declare man1

but it returned

The annotation @ConfigurationProperties is disallowed for this location

Answer 1

@ConfigurationProperties is only allow to be placed on the @Bean method in the @Configuration class or at the class level. For the former case , it will map the properties from the application.properties to the bean instance , which means you have to :

@SpringBootApplication
public class Application {

    @Bean
    @ConfigurationProperties(prefix="test1")
    public People man1() {
        return new People();
    }

    @Bean
    @ConfigurationProperties(prefix="test2")
    public People man2() {
        return new People();
    }
} 

And since both man1 and man2 are the same type , you have to further use @Qualifier to tell Spring which instance you actually want to inject by specifying its bean name. The bean name can be configured by @Bean("someBeanName"). If @Bean is used without configuring the bean name, the method name will be used as the bean name. (i.e. man1 and man2)

@Autowired
@Qualifier("man1")
public People man1;

@Autowired
@Qualifier("man2")
public People man2;