在 Spring Controller 中获取 Locale 的优雅方式

Question

我正在寻找一种比在每个控制器方法开始时显式调用 LocaleContextHolder.getLocale() 更简洁的方法（在 Spring 3.2 中）来获取当前语言环境。它必须与 Java 注释兼容，因为我没有使用 XML 配置。这是我目前正在做的事情。

@Controller
public class WifeController {
    @Autowired
    private MessageSource msgSrc;

    @RequestMapping(value = "/wife/mood")
    public String readWife(Model model, @RequestParam("whatImDoing") String iAm) {
        Locale loc = LocaleContextHolder.getLocale();
        if(iAm.equals("playingXbox")) {
            model.addAttribute( "statusTitle", msgSrc.getMessage("mood.angry", null, loc) );
            model.addAttribute( "statusDetail", msgSrc.getMessage("mood.angry.xboxdiatribe", null, loc) );
        }
        return "moodResult";
    }
}

Answer 1

在 Spring 3.2 reference docs 中，第 17.3.3 节，支持的方法参数类型：

The following are the supported method arguments:

Request or response objects (Servlet API). Choose any specific request or response type, for example ServletRequest or HttpServletRequest.

(...)

java.util.Locale for the current request locale, determined by the most specific locale resolver available, in effect, the configured LocaleResolver in a Servlet environment.

所以您需要做的就是在每个方法中接收一个 Locale 的实例作为参数：

@RequestMapping(value = "/wife/mood")
public String readWife(Model model, @RequestParam("whatImDoing") String iAm, Locale loc) {
    if (iAm.equals("playingXbox")) {
        model.addAttribute("statusTitle", msgSrc.getMessage("mood.angry", null, loc));
        model.addAttribute("statusDetail", msgSrc.getMessage("mood.angry.xboxdiatribe", null, loc));
    }
    return "moodResult";
}

Answer 2

作为替代方案，您还可以自动装配 HttpServletRequest

@Autowired
private HttpServletRequest request;

然后在控制器中的任意位置使用 request.getLocale()。

在 Spring Controller 中获取 Locale 的优雅方式

Elegant way to get Locale in Spring Controller

java

locale

spring-mvc

spring-3