Properties file tool class

 

 

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.util.DefaultPropertiesPersister;
import org.springframework.util.PropertiesPersister;

/**
 * Properties file tool class.

 */
public class PropertiesLoader {

    private static final String DEFAULT_ENCODING = "UTF-8";
    private static Logger logger = LoggerFactory.getLogger(PropertiesLoader.class);
    private static PropertiesPersister propertiesPersister = new DefaultPropertiesPersister();
    private static ResourceLoader resourceLoader = new DefaultResourceLoader();

    private PropertiesLoader() {
    }

    /**
     * Loading multiple properties files, the value of the same property in the last loaded file will overwrite the previous loading.
     * The file path uses Spring Resource format, and the file encoding uses UTF-8.
     *
     * @see org.springframework.beans.factory.config.PropertyPlaceholderConfigurer
     */
    public static Properties loadProperties(String... resourcesPaths) throws IOException {
        Properties props = new Properties();

        for (String location : resourcesPaths) {

            logger.debug("Loading properties file from:" + location);

            InputStream is = null;
            try {
                Resource resource = resourceLoader.getResource(location);
                is = resource.getInputStream();
                propertiesPersister.load(props, new InputStreamReader(is, DEFAULT_ENCODING));
            } catch (IOException ex) {
                logger.info("Could not load properties from classpath:" + location + ": " + ex.getMessage());
            } finally {
                if (is != null) {
                    is.close();
                }
            }
        }
        return props;
    }
}