org.springframework.context.MessageSource#getMessage ( )源码实例Demo

/**
 * <p>返回失败,无数据</p>
 * @param BindingResult
 * @return JsonResult
 */
public JsonResult<T> error(BindingResult result, MessageSource messageSource) {
    StringBuffer msg = new StringBuffer();
    // 获取错位字段集合
    List<FieldError> fieldErrors = result.getFieldErrors();
    // 获取本地locale,zh_CN
    Locale currentLocale = LocaleContextHolder.getLocale();
    for (FieldError fieldError : fieldErrors) {
        // 获取错误信息
        String errorMessage = messageSource.getMessage(fieldError, currentLocale);
        // 添加到错误消息集合内
        msg.append(fieldError.getField() + "：" + errorMessage + " ");
    }
    this.setCode(CODE_FAILED);
    this.setMsg(msg.toString());
    this.setData(null);
    return this;
}
 

/**
 * 查找错误消息
 *
 * @param source
 * @param code
 * @param params
 * @param defaultMsg
 *
 * @return
 */
public static int getIntMessage(MessageSource source, String code, Object[] params, String defaultMsg) {
    if (Check.isNull(source)) {
        throw new IllegalArgumentException("message source is null");
    }
    if (Check.isNullOrEmpty(code)) {
        throw new IllegalArgumentException("code is empty");
    }
    //如果没有object 默认设置为空数组
    if (Check.isNull(params)) {
        params = new Object[]{};
    }
    String message = null;

    if (Check.isNullOrEmpty(defaultMsg)) {
        message = source.getMessage(code, params, Locale.SIMPLIFIED_CHINESE);
    } else {
        message = source.getMessage(code, params, defaultMsg, Locale.SIMPLIFIED_CHINESE);
    }
    if (Check.isNullOrEmpty(message)) {
        throw new NumberFormatException("message is empty");
    } else {
        return Integer.valueOf(message);
    }
}
 

public static void main(String[] args) {
    // 1. 创建 Validator
    Validator validator = new UserValidator();
    // 2. 判断是否支持目标对象的类型
    User user = new User();
    System.out.println("user 对象是否被 UserValidator 支持检验：" + validator.supports(user.getClass()));
    // 3. 创建 Errors 对象
    Errors errors = new BeanPropertyBindingResult(user, "user");
    validator.validate(user, errors);

    // 4. 获取 MessageSource 对象
    MessageSource messageSource = createMessageSource();

    // 5. 输出所有的错误文案
    for (ObjectError error : errors.getAllErrors()) {
        String message = messageSource.getMessage(error.getCode(), error.getArguments(), Locale.getDefault());
        System.out.println(message);
    }
}
 

/**
 * 查找错误消息
 *
 * @param source
 * @param code
 * @param params
 * @param defaultMsg
 * @return
 */
public static int getIntMessage(MessageSource source, String code, Object[] params, String defaultMsg) {
    if (Check.NuNObj(source)) {
        throw new IllegalArgumentException("message source is null");
    }
    if (Check.NuNStrStrict(code)) {
        throw new IllegalArgumentException("code is empty");
    }
    //如果没有object 默认设置为空数组
    if (Check.NuNObj(params)) {
        params = new Object[]{};
    }
    String message = null;

    if (Check.NuNStrStrict(defaultMsg)) {
        message = source.getMessage(code, params, Locale.SIMPLIFIED_CHINESE);
    } else {
        message = source.getMessage(code, params, defaultMsg, Locale.SIMPLIFIED_CHINESE);
    }
    if (Check.NuNStrStrict(message)) {
        throw new NumberFormatException("message is empty");
    } else {
        return Integer.valueOf(message);
    }
}
 

/**
 * Try to retrieve the given message from the parent {@code MessageSource}, if any.
 * @param code the code to lookup up, such as 'calculator.noRateSet'
 * @param args array of arguments that will be filled in for params
 * within the message
 * @param locale the locale in which to do the lookup
 * @return the resolved message, or {@code null} if not found
 * @see #getParentMessageSource()
 */
@Nullable
protected String getMessageFromParent(String code, @Nullable Object[] args, Locale locale) {
	MessageSource parent = getParentMessageSource();
	if (parent != null) {
		if (parent instanceof AbstractMessageSource) {
			// Call internal method to avoid getting the default code back
			// in case of "useCodeAsDefaultMessage" being activated.
			return ((AbstractMessageSource) parent).getMessageInternal(code, args, locale);
		}
		else {
			// Check parent MessageSource, returning null if not found there.
			// Covers custom MessageSource impls and DelegatingMessageSource.
			return parent.getMessage(code, args, null, locale);
		}
	}
	// Not found in parent either.
	return null;
}
 

/**
 * 查找错误消息
 *
 * @param source
 * @param code
 * @param params
 * @param defaultMsg
 *
 * @return
 */
public static String getChinese(MessageSource source, String code, Object[] params, String defaultMsg) {
    if (Check.isNull(source)) {
        throw new IllegalArgumentException("message source is null");
    }
    if (Check.isNullOrEmpty(code)) {
        throw new IllegalArgumentException("code is empty");
    }
    //如果没有object 默认设置为空数组
    if (Check.isNull(params)) {
        params = new Object[]{};
    }
    if (Check.isNullOrEmpty(defaultMsg)) {
        return source.getMessage(code, params, Locale.SIMPLIFIED_CHINESE);
    } else {
        return source.getMessage(code, params, defaultMsg, Locale.SIMPLIFIED_CHINESE);
    }
}
 

/**
 * Try to retrieve the given message from the parent {@code MessageSource}, if any.
 * @param code the code to lookup up, such as 'calculator.noRateSet'
 * @param args array of arguments that will be filled in for params
 * within the message
 * @param locale the locale in which to do the lookup
 * @return the resolved message, or {@code null} if not found
 * @see #getParentMessageSource()
 */
protected String getMessageFromParent(String code, Object[] args, Locale locale) {
	MessageSource parent = getParentMessageSource();
	if (parent != null) {
		if (parent instanceof AbstractMessageSource) {
			// Call internal method to avoid getting the default code back
			// in case of "useCodeAsDefaultMessage" being activated.
			return ((AbstractMessageSource) parent).getMessageInternal(code, args, locale);
		}
		else {
			// Check parent MessageSource, returning null if not found there.
			return parent.getMessage(code, args, null, locale);
		}
	}
	// Not found in parent either.
	return null;
}
 

private String getI18nMessage(Connection conn) throws MigrationException {
// get spring bean
ApplicationContext context = new ClassPathXmlApplicationContext("org/lamsfoundation/lams/messageContext.xml");
MessageService messageService = (MessageService) context.getBean("commonMessageService");

// get server locale
String defaultLocale = "en_AU";
String getDefaultLocaleStmt = "select config_value from lams_configuration where config_key='ServerLanguage'";
try {
    PreparedStatement query = conn.prepareStatement(getDefaultLocaleStmt);
    ResultSet results = query.executeQuery();
    while (results.next()) {
	defaultLocale = results.getString("config_value");
    }
} catch (Exception e) {
    throw new MigrationException("Problem running update; ", e);
}

String[] tokenisedLocale = defaultLocale.split("_");
Locale locale = new Locale(tokenisedLocale[0], tokenisedLocale[1]);

// get i18n'd message for text 'run sequences'
MessageSource messageSource = messageService.getMessageSource();
String i18nMessage = messageSource.getMessage("runsequences.folder.name", new Object[] { "" }, locale);

if (i18nMessage != null && i18nMessage.startsWith("???")) {
    // default to English if not present
    return " Run Sequences";
}
return i18nMessage;
   }
 

/**
 * Resolve the specified message into a concrete message String.
 * The returned message String should be unescaped.
 */
protected String resolveMessage() throws JspException, NoSuchMessageException {
	MessageSource messageSource = getMessageSource();

	// Evaluate the specified MessageSourceResolvable, if any.
	if (this.message != null) {
		// We have a given MessageSourceResolvable.
		return messageSource.getMessage(this.message, getRequestContext().getLocale());
	}

	if (this.code != null || this.text != null) {
		// We have a code or default text that we need to resolve.
		Object[] argumentsArray = resolveArguments(this.arguments);
		if (!this.nestedArguments.isEmpty()) {
			argumentsArray = appendArguments(argumentsArray, this.nestedArguments.toArray());
		}

		if (this.text != null) {
			// We have a fallback text to consider.
			String msg = messageSource.getMessage(
					this.code, argumentsArray, this.text, getRequestContext().getLocale());
			return (msg != null ? msg : "");
		}
		else {
			// We have no fallback text to consider.
			return messageSource.getMessage(
					this.code, argumentsArray, getRequestContext().getLocale());
		}
	}

	throw new JspTagException("No resolvable message");
}
 

/**
 * 根据model.name以及当前语言获取到对应的值
 * @param i18nName
 * @return
 */
public static String transFormString(String i18nName){
    MessageSource messageSource = SpringContextHolder.getBean("messageSource");
    String source = messageSource.getMessage(i18nName, null, LocaleContextHolder.getLocale());
    if(source.equals(i18nName)){
        log.warn("i18n:{}对应的国际化配置在数据库不存在，请检查！", i18nName);
    }
    return source;
}
 

private String getI18nMessage(Connection conn) throws MigrationException {
// get spring bean
ApplicationContext context = new ClassPathXmlApplicationContext("org/lamsfoundation/lams/messageContext.xml");
MessageService messageService = (MessageService) context.getBean("commonMessageService");

// get server locale
String defaultLocale = "en_AU";
String getDefaultLocaleStmt = "select config_value from lams_configuration where config_key='ServerLanguage'";
try {
    PreparedStatement query = conn.prepareStatement(getDefaultLocaleStmt);
    ResultSet results = query.executeQuery();
    while (results.next()) {
	defaultLocale = results.getString("config_value");
    }
} catch (Exception e) {
    throw new MigrationException("Problem running update; ", e);
}

String[] tokenisedLocale = defaultLocale.split("_");
Locale locale = new Locale(tokenisedLocale[0], tokenisedLocale[1]);

// get i18n'd message for text 'run sequences'
MessageSource messageSource = messageService.getMessageSource();
String i18nMessage = messageSource.getMessage("public.folder.name", null, locale);

if (i18nMessage != null && i18nMessage.startsWith("???")) {
    // default to English if not present
    return "Public Folder";
}
return i18nMessage;
   }
 

/**
 * Resolve the specified message into a concrete message String.
 * The returned message String should be unescaped.
 */
protected String resolveMessage() throws JspException, NoSuchMessageException {
	MessageSource messageSource = getMessageSource();
	if (messageSource == null) {
		throw new JspTagException("No corresponding MessageSource found");
	}

	// Evaluate the specified MessageSourceResolvable, if any.
	if (this.message != null) {
		// We have a given MessageSourceResolvable.
		return messageSource.getMessage(this.message, getRequestContext().getLocale());
	}

	if (this.code != null || this.text != null) {
		// We have a code or default text that we need to resolve.
		Object[] argumentsArray = resolveArguments(this.arguments);
		if (!this.nestedArguments.isEmpty()) {
			argumentsArray = appendArguments(argumentsArray, this.nestedArguments.toArray());
		}

		if (this.text != null) {
			// We have a fallback text to consider.
			return messageSource.getMessage(
					this.code, argumentsArray, this.text, getRequestContext().getLocale());
		}
		else {
			// We have no fallback text to consider.
			return messageSource.getMessage(
					this.code, argumentsArray, getRequestContext().getLocale());
		}
	}

	// All we have is a specified literal text.
	return this.text;
}
 

/**
    * Get the I18N description for this key. If the tool has supplied a messageService, then this is used to look up
    * the key and hence get the text. Otherwise if the tool has supplied a I18N languageFilename then it is accessed
    * via the shared toolActMessageService. If neither are supplied or the key is not found, then any "." in the name
    * are converted to space and this is used as the return value.
    *
    * This is normally used to get the description for a definition, in whic case the key should be in the format
    * output.desc.[definition name], key = definition name and addPrefix = true. For example a definition name of
    * "learner.mark" becomes output.desc.learner.mark.
    *
    * If you want to use this to get an arbitrary string from the I18N files, then set addPrefix = false and the
    * output.desc will not be added to the beginning.
    */
   protected String getI18NText(String key, boolean addPrefix) {
String translatedText = null;

MessageSource tmpMsgSource = getMsgSource();
if (tmpMsgSource != null) {
    if (addPrefix) {
	key = KEY_PREFIX + key;
    }
    Locale locale = LocaleContextHolder.getLocale();
    try {
	translatedText = tmpMsgSource.getMessage(key, null, locale);
    } catch (NoSuchMessageException e) {
	log.warn("Unable to internationalise the text for key " + key
		+ " as no matching key found in the msgSource");
    }
} else {
    log.warn("Unable to internationalise the text for key " + key
	    + " as no matching key found in the msgSource. The tool's OutputDefinition factory needs to set either (a) messageSource or (b) loadedMessageSourceService and languageFilename.");
}

if (translatedText == null || translatedText.length() == 0) {
    translatedText = key.replace('.', ' ');
}

return translatedText;
   }
 

@Override
   public String internationaliseActivityTitle(Long learningLibraryID) {

ToolActivity templateActivity = (ToolActivity) activityDAO.getTemplateActivityByLibraryID(learningLibraryID);

if (templateActivity != null) {
    Locale locale = LocaleContextHolder.getLocale();
    String languageFilename = templateActivity.getLanguageFile();
    if (languageFilename != null) {
	MessageSource toolMessageSource = toolActMessageService.getMessageService(languageFilename);
	if (toolMessageSource != null) {
	    String title = toolMessageSource.getMessage(Activity.I18N_TITLE, null, templateActivity.getTitle(),
		    locale);
	    if (title != null && title.trim().length() > 0) {
		return title;
	    }
	} else {
	    log.warn("Unable to internationalise the library activity " + templateActivity.getTitle()
		    + " message file " + templateActivity.getLanguageFile()
		    + ". Activity Message source not available");
	}
    }
}

if (templateActivity.getTitle() != null && templateActivity.getTitle().trim().length() > 0) {
    return templateActivity.getTitle();
} else {
    return "Untitled"; // should never get here - just return something in case there is a bug. A blank title affect the layout of the main page
}
   }
 

public static String getMessageOfLocale(String id, Locale locale, Object... args) {
    MessageSource source = getInstance().getMessageSource();
    String defaultMessage = locale == DEFAULT_LOCALE ? null : source.getMessage(id, args, DEFAULT_LOCALE);
    String message = source.getMessage(id, args, defaultMessage, locale);
    return message != null ? message : "Error: Cannot find message with id " + id;
}
 

/**
 * 根据消息键和参数 获取消息 委托给spring messageSource
 *
 * @param code 消息键
 * @param args 参数
 * @return 获取国际化翻译值
 */
public static String message(String code, Object... args)
{
    MessageSource messageSource = SpringUtils.getBean(MessageSource.class);
    return messageSource.getMessage(code, args, LocaleContextHolder.getLocale());
}
 

/**
 * 根据消息键和参数 获取消息 委托给spring messageSource
 *
 * @param code 消息键
 * @param args 参数
 * @return 获取国际化翻译值
 */
public static String message(String code, Object... args)
{
    MessageSource messageSource = SpringUtils.getBean(MessageSource.class);
    return messageSource.getMessage(code, args, LocaleContextHolder.getLocale());
}
 

/**
 * 根据消息键和参数 获取消息 委托给spring messageSource
 *
 * @param code 消息键
 * @param args 参数
 * @return
 */
public static String message(String code, Object... args)
{
    MessageSource messageSource = SpringUtils.getBean(MessageSource.class);
    return messageSource.getMessage(code, args, null);
}
 

/**
 * 根据消息键和参数 获取消息 委托给spring messageSource
 *
 * @param code 消息键
 * @param args 参数
 * @return 国际化翻译值
 */
public static String message(String code, Object... args) {
    MessageSource messageSource = SpringUtils.getBean(MessageSource.class);
    return messageSource.getMessage(code, args, LocaleContextHolder.getLocale());
}
 

/**
 * 根据消息键和参数 获取消息 委托给spring messageSource
 *
 * @param code 消息键
 * @param args 参数
 */
public static String message(String code, Object... args)
{
    MessageSource messageSource = SpringUtils.getBean(MessageSource.class);
    return messageSource.getMessage(code, args, null);
}