Spring 读取i18n国际化资源文件的工具类

客官°小女子只卖身不卖艺 2022-07-24 07:20 157阅读 0赞

现有一个国际化资源文件demoUser\_zh\_CN.properties如下:

demoUser.create.success=创建成功
    demoUser.update.success=更新成功
    demoUser.delete.success=删除成功
    demoUser.start.success=送审成功
    demoUser.approval.success=审核成功
    demoUser.claim.success=签收成功
    demoUser.assignUser.success=分配成功
    demoUser.backNode.success=回退成功
    demoUser.resolve.success=处理成功
    demoUser.assign.success=转办成功
    demoUser.signal.success=流转成功

现在我们需要在程序中根据key读取相应的value，因此现在我们写一个加载i18n文件的工具类,以便我们进行操作,此工具类是基于Spring Framework来编写的,具体的代码如下：

import java.io.IOException;
    import java.util.HashSet;
    import java.util.Set;
    
    import org.springframework.context.MessageSource;
    import org.springframework.context.i18n.LocaleContextHolder;
    import org.springframework.context.support.MessageSourceAccessor;
    import org.springframework.context.support.ReloadableResourceBundleMessageSource;
    import org.springframework.core.io.Resource;
    import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
    import org.springframework.core.io.support.ResourcePatternResolver;
    
    
    
    public class MessageUtil{
    	
    	protected static MessageSourceAccessor accessor;
    	protected static MessageSource messageSource;
    	protected static Set<String> set = new HashSet<String>();
    	private static int defaultStatus = 1;
    	static ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();
            //静态块初始化资源
    	static{
    		addLocation("classpath*:i18n/*");
    	}
    	//初始化资源文件的存储器
    	protected static void initMessageSourceAccessor(){
    		String[]basenames = new String[set.size()];
    		set.toArray(basenames);
    		ReloadableResourceBundleMessageSource reloadableResourceBundleMessageSource = new ReloadableResourceBundleMessageSource();
    		reloadableResourceBundleMessageSource.setBasenames(basenames);
    		reloadableResourceBundleMessageSource.setCacheSeconds(5);
    		accessor = new MessageSourceAccessor(reloadableResourceBundleMessageSource);
    		messageSource = reloadableResourceBundleMessageSource;
    	}
    	//删除指定位置的资源
    	public static void removeLocation(String locationPattern){
    		try {
    			Resource[] resources = resourcePatternResolver.getResources(locationPattern);
    			for (int i = 0; i < resources.length; i++) {
    				String url = resources[i].getURL().toString();
    				int lastIndex = url.lastIndexOf("/");
    				String prefix = url.substring(0,lastIndex + 1);
    				String suffix = url.substring(lastIndex+1);
    				suffix = suffix.split("\\.")[0].split("_")[0];
    				set.remove(prefix + suffix);
    			}
    		} catch (IOException e) {
    			throw new RuntimeException(e);
    		}
    		initMessageSourceAccessor();
    	}
    	//加载指定位置的资源文件
    	public static void addLocation(String locationPattern){
    		try {
    			Resource[] resources = resourcePatternResolver.getResources(locationPattern);
    			for (int i = 0; i < resources.length; i++) {
    				String url = resources[i].getURL().toString();
    				int lastIndex = url.lastIndexOf("/");
    				String prefix = url.substring(0,lastIndex + 1);
    				String suffix = url.substring(lastIndex+1);
    				suffix = suffix.split("\\.")[0].split("_")[0];
    				set.add(prefix + suffix);
    			}
    		} catch (IOException e) {
    			throw new RuntimeException(e);
    		}
    		initMessageSourceAccessor();
    	}
    	
    	private MessageUtil(){
    	}
    
    	public static Message message(int status,String code,Object[] args,Object data){
    		return new Message(status, getMessage(code,args), data);
    	}
    	
    	public static Message message(int status,String code,Object data){
    		return new Message(status, getMessage(code), data);
    	}
    	
    	public static Message message(int status,String code,Object[] args){
    		return new Message(status, getMessage(code,args));
    	}
    	
    	public static Message message(int status, String code) {
    		return new Message(status, getMessage(code));
    	}
    	
    	public static Message message(int status,Object data){
    		return new Message(status,"1",data);
    	}
    	
    	public static Message message(String code){
    		return new Message(defaultStatus, getMessage(code));
    	}
    	
    	public static Message message(String code,Object[] args){
    		return new Message(defaultStatus, getMessage(code, args));
    	}
    	
    	public static Message message(String code,Object[] args,Object data){
    		return new Message(defaultStatus, getMessage(code, args), data);
    	}
    	
    	public static Message message(String code,Object data){
    		return new Message(defaultStatus, getMessage(code), data);
    	}
    	
    	public static String getMessage(String code){
    		return accessor.getMessage(code,LocaleContextHolder.getLocale());
    	}
    	
    	public static String getMessage(String code,String defaultMessage){
    		return accessor.getMessage(code,defaultMessage,LocaleContextHolder.getLocale());
    	}
    	
    	public static String getMessage(String code, Object[] args){
    		return accessor.getMessage(code,args,LocaleContextHolder.getLocale());
    	}
    	
    	public static String getMessage(String code, Object[] args,String defaultMessage){
    		return accessor.getMessage(code, args, defaultMessage, LocaleContextHolder.getLocale());
    	}
    
    	public static MessageSource getMessageSource() {
    		return messageSource;
    	}
    
    }

具体使用：

//新增
    	@RequestMapping(method = RequestMethod.POST)
    	public @ResponseBody Message create(DemoUser demoUser){
    		demoUser.setProcessState(ProcessBizEngineService.PROCESS_NEW_STATE);
    		demoUserService.save(demoUser);
    		return MessageUtil.message("demoUser.create.success");
    	}