jackson-core-asl-1.9.0.jar,jackson-mapper-asl-1.9.0.jar两个包
并且在controller中有如下代码
@RequestMapping(value="/getList") @ResponseBody public Map<String, Object> getList(){ List<Text> list=biz.queryList(); Map<String, Object> map=new HashMap<String,Object>(); map.put("size", list.size()); map.put("data", list); map.put("success", "true"); return map; }
运行,想要获取这个json数据,出现406,
异常代码:The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers.
原因,springMVC.xml文件中,没有配置如下代码
<bean id="messageAdapter" class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <!-- Support JSON --> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/> </list> </property> </bean> <bean id="exceptionMessageAdapter" class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerExceptionResolver"> <property name="messageConverters"> <list> <!-- Support JSON --> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/> </list> </property> </bean>
配置上方代码之后,运行获取json页面出现500.
异常代码:Could not find acceptable representation
因为少了下方代码,在添加如下代码后:
<mvc:annotation-driven /> <mvc:default-servlet-handler />再次出现500异常:通配符的匹配很全面, 但无法找到元素 'context:component-scan' 的声明。
原因springMVC.xml的<beans>中没有添加如下代码:
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