How to get spring boot property file value as Map<String,String> - spring

Question

In my project am having a requirement to retrieve a property file values in a map. This is how i wrote a code to retrieve property file value in a map. But values is not binding in the map. How can i achieve this.Is anything i missed?
specialist.properties
#Configuration
#ConfigurationProperties(prefix = "specialist")
#PropertySource("classpath:specialist.properties")
public class SpecialistProperties {
private Map<String,String> specialist=new HashMap<String,String>();
public Map<String, String> getSpecialist() {
return specialist;
}
public void setSpecialist(Map<String, String> specialist) {
this.specialist = specialist;
}
}
Controller class:
#RestController
public class MyappController {
#Autowired
private SpecialistProperties specialistProperties;
#GetMapping(value="/specialist")
public Map<String,String> getSpecialist()
{
return specialistProperties.getMap();
}
}
specialist.properties
specialist.name=Sam
specialist.availableDay=Wednesday
specialist.availableTime=5PM

Answer 1

You can set properties as shown below.
Make a file with name: application.properties with following code:
example.hello=Hello
example.user=Abhimanyu
example.howru=How are you?
example.mapProperty.key1=MapValue1
example.mapProperty.key2=MapValue2
example.listProperty[0]=ListValue1
example.listProperty[1]=ListValue2
OR:
Make a file with name: application.yml with the following code
example:
hello: Hello
user: Abhimanyu
howru: How are you?
mapProperty:
key1: MapValue1
key2: MapValue2
listProperty:
ListValue1
ListValue2
And you can verify/format your yaml file online by visiting https://jsonformatter.org/yaml-validator
For your reference refer following the link: http://jcombat.com/spring/how-to-read-properties-using-spring-boot-configurationproperties

Answer 2

I made a mistake by adding the #ConfigurationProperties(prefix="specialist"). No need of prefix="specialist". Because the map property value i have added as specialist, so there is no need of specialist in the ConfigurationProperties prefix. After the change it was worked good.
#Configuration
#ConfigurationProperties
#PropertySource("classpath:specialist.properties")
public class SpecialistProperties {
private Map<String,String> prop=new HashMap<String,String>();
public Map<String, String> getProp() {
return prop;
}
public void setProp(Map<String, String> prop) {
this.prop = prop;
}
}