定义默认语言环境并处理Spring Locale Interceptor的异常 [英] Define default locale and treat exceptions for Spring Locale Interceptor

问题描述

是否可以定义应该加载的默认语言环境，以防用户设置？lang = unknownlang ？

Is it possible to define a default locale that should be loaded in case the user sets ?lang=unknownlang ?

在我的春天-servlet.xml我有：

In my spring-servlet.xml i have:

<bean id="localeChangeInterceptor"
   class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
    <property name="paramName" value="lang" />
</bean>

<bean id="localeResolver"
    class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
    <property name="defaultLocale" value="pt" />
</bean>

此外，如果我在我的网址参数中指定了无效字符，例如？lang = p @ t，spring会抛出一个应该处理的异常，我该怎么做？

Also if i specify invalid characters in my url param like ?lang=p@t, spring throws an exception that should be handled, how would i go about that ?

Error 500: org.springframework.web.util.NestedServletException: Request processing failed&#59; nested exception is java.lang.IllegalArgumentException: Locale part "'" contains invalid characters

推荐答案

我设法解决了这些问题。

I managed to solve these problems.

关于默认语言环境，只要资源包中有默认的.properties文件，spring就会在内部解决。

Regarding the default locale, spring will solve that internally as long as there is a default .properties file in the resource bundle.

所以在我的情况下，必须有一个xxx_pt.properties xxx_en.properties和一个xxx.properties。

So in my case there would have to be a xxx_pt.properties xxx_en.properties and a xxx.properties.

对于异常处理，我实际上必须覆盖LocaleChangeInterceptor类的preHandle方法并捕获异常：

For the exception handling I actually had to override the preHandle method of the LocaleChangeInterceptor class and catch the exception:

spring-servlet.xml

<bean id="localeChangeInterceptor"
    class="com.xxx.xxx.LanguageExceptionHandler">
    <property name="paramName" value="lang" />
</bean>

LanguageExceptionHandler.java

public class LanguageExceptionHandler extends LocaleChangeInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
        try {
            super.preHandle(request, response, handler);
        } catch (ServletException e) {
            DebugLogger.writeError("ServletException", e);
        } catch (IllegalArgumentException e) {
            DebugLogger.writeError("IllegalArgumentException", e);
        }
        return true;
    }
}

虽然根据这个，在较新版本的Spring中应该以不同的方式处理无效字符。

Although according to this, invalid characters should be handled differently in newer versions of Spring.

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