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Everybody knows if we want to read the properties file, we can do as follows:

@Configuration
@PropertySource("classpath:/application.properties")
public class AppConfig 

 @Value("$app.name")
 public String name;


 @Bean
 public static PropertySourcesPlaceholderConfigurer placeholderConfigurer() 
 return new PropertySourcesPlaceholderConfigurer();
 

 @Bean
 public PostService postService() 
 return new PostServiceImpl(name);
 

But, now I have a framework which is similar to SpringBoot. It can integrate Spring with Mybatis.

The problem is preceding code only can read my project classpath file but I need to read the properties file project using my framework. How I do it?

Update

I'm sorry for everybody. Maybe I don't say clearly, so here is the picture:

• I don't use SpringBoot




• I want to read the project(using my framework) classpath, not my framework classpath.

Thanks.

Spring framework can read external configuration files from different locations.
It can read the configuration file from your project directory but you would need to remove this line:

@PropertySource("classpath:/application.properties")

that limits it to your application class path.
You can check here to see the different locations spring read configuration files from.

Spring provides external configuration. By this you can run your application in different environment.

refer link :
https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html

If you do not like application.properties as the configuration file name, you can switch to another file name by specifying a spring.config.name environment property.

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;

@Configuration
@PropertySource("classpath:db.properties")
@PropertySource("classpath:project.properties")
public class DBConfiguration 

@Autowired
Environment env;

 @Bean
 public DBConnection getDBConnection() 
 System.out.println("Getting DBConnection Bean for 
 App:"+env.getProperty("APP_NAME"));
 DBConnection dbConnection = new DBConnection(env.getProperty("DB_DRIVER_CLASS"), 
 env.getProperty("DB_URL"), env.getProperty("DB_USERNAME"), 
 env.getProperty("DB_PASSWORD").toCharArray());
 return dbConnection;
 

 

DB.properties:
#Database configuration
DB_DRIVER_CLASS=com.mysql.jdbc.Driver
DB_URL=jdbc:mysql://localhost:3306/Test
DB_USERNAME=root
DB_PASSWORD=root

project.properties:
APP_NAME=TEST APP

If you are just wanting to read properties yourself from the classpath, you can use

Properties prop = new Properties();
InputStream input = this.getClass().getResourceAsStream("/application.properties")
prop.load(input);

// get the property value and print it out
System.out.println(prop.getProperty("foo"));