iqq.app.core.service.impl.I18nServiceImpl.java Source code

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Here is the source code for iqq.app.core.service.impl.I18nServiceImpl.java

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package iqq.app.core.service.impl;

import iqq.app.core.service.I18nService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import java.io.*;
import java.text.MessageFormat;
import java.util.*;

/**
 * ???resources/i18nappBundle
 *
 * Project  : iqq-projects
 * Author   :  < 6208317@qq.com >
 * Created  : 14-4-17
 * License  : Apache License 2.0
 */
@Service
public class I18nServiceImpl implements I18nService {
    private static final Logger LOG = LoggerFactory.getLogger(I18nServiceImpl.class);

    /**
     * ???
     */
    public static final String I18N_BUNDLE = "appBundle";

    /**
     * ?
     */
    public static final String I18N_DIR = System.getProperty("app.dir", System.getProperty("user.dir"))
            + File.separator + "resources" + File.separator + "i18n" + File.separator;

    private Map<String, ResourceBundle> resourceBundleMap = new HashMap<String, ResourceBundle>();

    /**
     * ???
     *
     * @param messageKey
     * @return
     */
    @Override
    public String getMessage(String messageKey) {
        return getMessage(messageKey, getCurrentLocale());
    }

    /**
     * ?????
     *
     * @param messageKey
     * @param params
     * @return
     */
    @Override
    public String getMessage(String messageKey, Object... params) {
        return getMessage(messageKey, getCurrentLocale(), params);
    }

    /**
     * ???
     *
     * @param messageKey
     * @param locale
     * @return
     */
    @Override
    public String getMessage(String messageKey, Locale locale) {
        return getResourceBundle(locale).getString(messageKey);
    }

    /**
     * ?????
     *
     * @param messageKey
     * @param locale
     * @param params
     * @return
     */
    @Override
    public String getMessage(String messageKey, Locale locale, Object... params) {
        String message = getMessage(messageKey, locale);
        if (message != null && params != null) {
            message = MessageFormat.format(message, params);
        }
        return message;
    }

    /**
     * ??
     *
     * @return
     */
    @Override
    public Locale getCurrentLocale() {
        return Locale.getDefault();
    }

    /**
     * ??
     *
     * @return
     */
    @Override
    public String getI18nDirectory() {
        return I18N_DIR;
    }

    private ResourceBundle getResourceBundle(Locale locale) {
        BufferedInputStream bis = null;
        try {
            // ??_?_?.properties
            String flag = locale.getLanguage() + "_" + locale.getCountry();
            String filename = I18N_DIR + I18N_BUNDLE + "_" + flag + ".properties";
            ResourceBundle resourceBundle = resourceBundleMap.get(flag);
            // ???
            if (resourceBundle != null)
                return resourceBundle;
            if (!new File(filename).exists()) {
                filename = I18N_DIR + I18N_BUNDLE + ".properties";
            }
            LOG.debug(filename);
            bis = new BufferedInputStream(new FileInputStream(filename));
            resourceBundle = new PropertyResourceBundle(bis);
            resourceBundleMap.put(flag, resourceBundle);
            return resourceBundle;
        } catch (FileNotFoundException e) {
            LOG.error("?", e);
        } catch (IOException e) {
            LOG.error("??", e);
        } finally {
            if (bis != null)
                try {
                    bis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
        }
        return null;
    }
}