java 使用 Spring4 找不到 MappingJacksonHttpMessageConverter
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MappingHymansonHttpMessageConverter not found with Spring4
提问by Andrea Girardi
I migrated my Spring framework from 3.x to 4.2.RELEASE but, when I start the jUnit I'm getting this error:
我将 Spring 框架从 3.x 迁移到 4.2.RELEASE 但是，当我启动 jUnit 时，出现此错误：
Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from URL [file:src/test/resources/applicationContext.xml]; nested exception is java.lang.NoClassDefFoundError: org/springframework/http/converter/json/MappingHymansonHttpMessageConverter
I read on internet from Version 4.1. it's not supported anymore; I checked and the new version is available on application class path (I imported spring-web dependency). ( Spring 4 and Rest WS integration)
我从 4.1 版开始在互联网上阅读。它不再受支持；我检查了新版本在应用程序类路径上可用（我导入了 spring-web 依赖项）。（Spring 4 和 Rest WS 集成）
It seems spring is still looking for the old version of Converter. It probably depends on something I've on my application context, but, the question is, how can I "tell to Spring" to use new version?
看来spring还在寻找旧版本的Converter。这可能取决于我在应用程序上下文中的某些内容，但是，问题是，我如何“告诉 Spring”使用新版本？
-- UPDATE
I commented
- 更新
我评论
<mvc:annotation-driven />
and it seems to works fine but... why?
它似乎工作正常但是......为什么？
回答by Cornel Masson
There's a newer version of that class in Spring 4: use org.springframework.http.converter.json.MappingHymanson2HttpMessageConverter(note the '2').
Spring 4 中有该类的更新版本：use org.springframework.http.converter.json.MappingHymanson2HttpMessageConverter（注意“2”）。
In my REST servlet's Spring config file I have it configured as follows (I added my custom objectMapper to it, but you can just omit that):
在我的 REST servlet 的 Spring 配置文件中，我对其进行了如下配置（我向其中添加了我的自定义 objectMapper，但您可以省略它）：
<mvc:annotation-driven>
<mvc:message-converters>
<bean
class="org.springframework.http.converter.json.MappingHymanson2HttpMessageConverter">
<property name="objectMapper">
<bean class="s3.util.json.CustomJsonMapper" />
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
