Spring 读取i18n国际化资源文件的工具类

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");
}