メモ

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

@Service
public class MessageService {

    @Value("${greeting.morning}")
    private String morningMessage;

    @Value("${greeting.afternoon}")
    private String afternoonMessage;

    @Value("${greeting.evening}")
    private String eveningMessage;

    @Value("${error.E101}")
    private String errorE101Message;

    @Value("${error.E102}")
    private String errorE102Message;

    public String getMorningMessage() {
        return morningMessage;
    }

    public String getAfternoonMessage() {
        return afternoonMessage;
    }

    public String getEveningMessage() {
        return eveningMessage;
    }

    public String getErrorE101Message() {
        return errorE101Message;
    }

    public String getErrorE102Message() {
        return errorE102Message;
    }
}

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class MessageLogger {

    private static final Logger logger = LoggerFactory.getLogger(MessageLogger.class);

    @Autowired
    private MessageService messageService;

    public void logMessages() {
        logger.info("Morning Message: {}", messageService.getMorningMessage());
        logger.info("Afternoon Message: {}", messageService.getAfternoonMessage());
        logger.info("Evening Message: {}", messageService.getEveningMessage());
        logger.error("Error E101 Message: {}", messageService.getErrorE101Message());
        logger.error("Error E102 Message: {}", messageService.getErrorE102Message());
    }
}
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @Bean
    public CommandLineRunner run(MessageLogger messageLogger) {
        return args -> {
            messageLogger.logMessages();
        };
    }
}

~~~Java
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

@Service
public class MessageService {

    @Value("${greeting.morning}")
    private String morningMessage;

    public String getMorningMessage(String name) {
        return String.format(morningMessage, name);
    }
}

@Component
public class MessageLogger {

    private static final Logger logger = LoggerFactory.getLogger(MessageLogger.class);

    @Autowired
    private MessageService messageService;

    public void logMessages() {
        String name = "John"; // 例えば、名前をJohnとしますが、実際の名前をここに指定します
        String morningMessage = messageService.getMorningMessage(name);
        logger.info("Morning Message: {}", morningMessage);
    }
}