How to read data from java properties file using Spring Boot

Question

I have a spring boot application and I want to read some variable from my application properties file  In fact below codes do that  But I think there is a good method for this alternative   Properties prop   new Properties    InputStream input   null   try       input   new FileInputStream  config properties        prop load input       gMapReportUrl   prop getProperty  gMapReportUrl      catch  IOException ex        ex printStackTrace      finally

User · Answer

I have created following class

ConfigUtility.java

@Configuration
public class ConfigUtility {

    @Autowired
    private Environment env;

    public String getProperty(String pPropertyKey) {
        return env.getProperty(pPropertyKey);
    }
}

and called as follow to get application.properties value

myclass.java

@Autowired
private ConfigUtility configUtil;

public AppResponse getDetails() {

  AppResponse response = new AppResponse();
    String email = configUtil.getProperty("emailid");
    return response;        
}

application.properties

[email protected]

unit tested, working as expected...

User · Answer

You can use  PropertySource to externalize your configuration to a properties file  There is number of way to do get properties   1  Assign the property values to fields by using  Value with PropertySourcesPlaceholderConfigurer to resolve     in  Value    Configuration  PropertySource  file config properties   public class ApplicationConfiguration         Value    gMapReportUrl        private String gMapReportUrl        Bean     public static PropertySourcesPlaceholderConfigurer propertyConfigInDev             return new PropertySourcesPlaceholderConfigurer               2  Get the property values by using Environment    Configuration  PropertySource  file config properties   public class ApplicationConfiguration         Autowired     private Environment env       public void foo             env getProperty  gMapReportUrl               Hope this can help

User · Answer

i would suggest the following way    PropertySource ignoreResourceNotFound   true  value    classpath otherprops properties    Controller public class ClassA        Value    myName        private String name        RequestMapping value     xyz        ResponseBody     public void getName            System out println name             Here your new properties file name is  otherprops properties  and the property name is  myName   This is the simplest implementation to access properties file in spring boot version 1 5 8

User · Answer

We can read properties file in spring boot using 3 way   1  Read value from application properties Using  Value  map key as  public class EmailService      Value    email username     private String username       2  Read value from application properties Using  ConfigurationProperties  In this we will map prefix of key using ConfigurationProperties and key name is same as field of class     Component     ConfigurationProperties  email       public class EmailConfig            private String   username          3  Read  application properties Using using Environment object  public class EmailController     Autowired private Environment env    GetMapping   sendmail   public void sendMail             System out println  reading value from application properties file  using Environment         System out println  username     env getProperty  email username         System out println  pwd     env getProperty  email pwd         Reference   how to read value from application properties in spring boot

[java] How to read data from java properties file using Spring Boot

ConfigUtility.java

myclass.java

application.properties

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