Skip to main content

Reading Property Files in a Spring Framework in Java


Reading Property Files in a Spring Framework in Java


 Of the many ways possible to achieve this in  a Java based Project, they can be classified into 2 categories based on the nature of configuration, namely Annotation Based and Xml based.

Annotation Based:


Use @PropertySource("classpath:fileName.properties")


@Configuration
@ComponentScan(basePackages = { "com.myproject.*" })
@PropertySource("classpath:dbConfig.properties")
public class GetDBConnection {
...
}

Read Property File Data using either Environment or @Value

  • METHOD 1 - Using Environment:

@Autowired
private Environment env;

String dbUrl = env.getProperty("db.url");

  • Using @Value

@Value("${db.url}") // To be bound with an attribute
private String dbUrl;

//To resolve ${} in @Value, use PropertySourcesPlaceholderConfigurer.

@Bean
public static PropertySourcesPlaceholderConfigurer propertyConfigInDev() {
        return new PropertySourcesPlaceholderConfigurer();
}


 XML Based:


Using Spring Utils: (To Be Updated)





Labels:

Comments

Post a Comment

Popular posts from this blog

Add/Modify Header Values in Java HttpServletRequest using Servlet Filters

Add/Modify Header Values in Java HttpServletRequest using Servlet Filters Steps to Modify Request Headers in a Servlet Request. This example will demonstrate how to modify 'Content-Type' header in Java Servlet Filter. In order to achieve this, use a custom wrapper Class, that extends HttpServletRequestWrapper. Thereafter, we need to override certain methods inside this custom Class. getHeader(String name) getHeaders(String name) getHeaderNames() getParameter(final String name) Code snippet for overriding above methods.     @Override     public String getHeader(String name) {     String header = super.getHeader(name); if ("content-type".equalsIgnoreCase(name)){ System.out.println("Adds Header Content-Type as application/json"); return "application/json"; }         return header;     }          @Override     public Enumeration ...
Post a Comment
Read more

Fixing Keycloak Error : MediaType not set on path , with response status 200

Using a custom endpoint with Media Type set as 'Application/Json'. When this endpoint is accessed, below error is returned. ERROR [org.keycloak.headers.DefaultSecurityHeadersProvider] (default task-16) MediaType not set on path /auth/realms/my-realm/broker/keycloak-oidc/token, with response status 200 06:31:08,489 ERROR [org.keycloak.services.error.KeycloakErrorHandler] (default task-16) Uncaught server error: javax.ws.rs.InternalServerErrorException: HTTP 500 Internal Server Error at org.keycloak.keycloak-services@10.0.2//org.keycloak.headers.DefaultSecurityHeadersProvider.addHeaders(DefaultSecurityHeadersProvider.java:71) at org.keycloak.keycloak-services@10.0.2//org.keycloak.services.filters.KeycloakSecurityHeadersFilter.filter(KeycloakSecurityHeadersFilter.java:36) The fix for this is to bind the blank response to Application/Json as follows: return Response.ok(json, MediaType.APPLICATION_JSON).build(); Do try it out, and let me know if it works. Do drop some comments is an...
Post a Comment
Read more

Run Spring Boot application in Standalone Tomcat Server

How to run Spring Boot application on Tomcat To deploy a Spring Boot application on existing Tomcat Server, or to bundle it as war file and deploy on Tomcat, following changes are required: Change to war packaging in pom.xml: <packaging>war Application Main class to extend  SpringBootServletInitializer. Override configure method in this class.                protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {                        return application.sources(Application.class);                } Add Tomcat-starter dependency in pom.xml. <dependency>     <groupId>org.springframework.boot</groupId>     <artifactId>spring-boot-starter-tomcat</artifactId>     <scope>provided</scope> </dependency...
Post a Comment
Read more