spring mvc 配置返回json需要两个重要的bean
ContentNegotiatingViewResolver
MappingJackson2JsonView
具体看代码
<bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean"> ???????<property name="mediaTypes"> ???????????<value> ???????????????html=text/html ???????????????json=application/json ???????????????xml=application/xml ???????????</value> ???????</property> ???????<property name="defaultContentType" value="text/html"/> ???</bean> ???<!-- ContentNegotiatingViewResolver视图解析器,利用他就可以配置多种返回值 --> ???<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver"> ???????<property name="order" value="0"/> ???????<property name="contentNegotiationManager" ref="contentNegotiationManager"/> ???????<property name="viewResolvers"> ???????????<list> ???????????????<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> ???????????????????<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> ???????????????????<property name="prefix" value="/WEB-INF/jsp/"/> ???????????????????<property name="suffix" value=".jsp"/> ???????????????</bean> ???????????</list> ???????</property> ???????<property name="defaultViews"> ???????????<list> ???????????????<bean ?class="org.springframework.web.servlet.view.json.MappingJackson2JsonView"> ???????????????????<property ?name="extractValueFromSingleKeyModel" value="true" /> ???????????????</bean> ???????????????<bean ?class="org.springframework.web.servlet.view.xml.MarshallingView"> ???????????????????<property name="marshaller"> ???????????????????????<bean ?class="org.springframework.oxm.xstream.XStreamMarshaller" /> ???????????????????</property> ???????????????</bean> ???????????</list> ???????</property> ???</bean> ???<bean id="multipartResolver" class="org.springframework.web.multipart.support.StandardServletMultipartResolver"/>
直接用HTTP返回JSON到浏览器
原文地址：https://www.cnblogs.com/BBchao/p/8528964.html