问题
我在我的Annotation驱动的Spring MVC Java Web应用程序中运行在jetty Web服务器上(目前在maven jetty插件中)。
我正在尝试使用一个控制器方法执行一些AJAX支持,只返回String帮助文本。资源采用UTF-8编码,字符串也是如此,但我的服务器响应来自于
content-encoding: text/plain;charset=ISO-8859-1
即使我的浏览器发送
Accept-Charset windows-1250,utf-8;q=0.7,*;q=0.7
我正在以某种方式使用弹簧的默认配置
我发现了一个提示将这个bean添加到配置中,但我认为它只是没有使用,因为它说它不支持编码,而是使用默认编码。
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes" value="text/plain;charset=UTF-8" />
</bean>
我的控制器代码是(请注意,此响应类型的更改对我不起作用):
@RequestMapping(value = "ajax/gethelp")
public @ResponseBody String handleGetHelp(Locale loc, String code, HttpServletResponse response) {
log.debug("Getting help for code: " + code);
response.setContentType("text/plain;charset=UTF-8");
String help = messageSource.getMessage(code, null, loc);
log.debug("Help is: " + help);
return help;
}
#1 热门回答(144 赞)
我找到了Spring 3.1的解决方案。使用@ResponseBody注释。以下是使用Json输出的控制器示例:
@RequestMapping(value = "/getDealers", method = RequestMethod.GET,
produces = "application/json; charset=utf-8")
@ResponseBody
public String sendMobileData() {
}
#2 热门回答(57 赞)
简单声明StringHttpMessageConverter
bean是不够的,你需要将它注入AnnotationMethodHandlerAdapter
:
<bean class = "org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<array>
<bean class = "org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes" value = "text/plain;charset=UTF-8" />
</bean>
</array>
</property>
</bean>
但是,使用此方法你必须重新定义所有HttpMessageConverter
,并且它不适用于<mvc:annotation-driven />
。
所以,也许最方便但最丑陋的方法是拦截AnnotationMethodHandlerAdapter
withBeanPostProcessor
的实例化:
public class EncodingPostProcessor implements BeanPostProcessor {
public Object postProcessBeforeInitialization(Object bean, String name)
throws BeansException {
if (bean instanceof AnnotationMethodHandlerAdapter) {
HttpMessageConverter<?>[] convs = ((AnnotationMethodHandlerAdapter) bean).getMessageConverters();
for (HttpMessageConverter<?> conv: convs) {
if (conv instanceof StringHttpMessageConverter) {
((StringHttpMessageConverter) conv).setSupportedMediaTypes(
Arrays.asList(new MediaType("text", "html",
Charset.forName("UTF-8"))));
}
}
}
return bean;
}
public Object postProcessAfterInitialization(Object bean, String name)
throws BeansException {
return bean;
}
}
<bean class = "EncodingPostProcessor " />
#3 热门回答(48 赞)
请注意,在Spring MVC 3.1中,你可以使用MVC命名空间来配置消息转换器:
<mvc:annotation-driven>
<mvc:message-converters register-defaults="true">
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes" value = "text/plain;charset=UTF-8" />
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
或基于代码的配置:
@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {
private static final Charset UTF8 = Charset.forName("UTF-8");
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
StringHttpMessageConverter stringConverter = new StringHttpMessageConverter();
stringConverter.setSupportedMediaTypes(Arrays.asList(new MediaType("text", "plain", UTF8)));
converters.add(stringConverter);
// Add other converters ...
}
}