在JavaWEB项目中,使用SSM框架,在项目启动时出现如下错误: Cannot find class [org.springframework.http.converter.json.MappingJacksonHttpMessageConverter] for bean with name ‘mappingJacksonHttpMessageConverter’ defined in class path resource [spring-mvc.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.http.converter.json.MappingJacksonHttpMessageConverter 查看之后,出错的地方为配置文件中配置了一个bean,id为mappingJacksonHttpMessageConverter,class为
“org.springframework.http.converter.json.MappingJacksonHttpMessageConverter”,
纠结很久之后,发现其实就是和所用的的Spring框架的版本有关,这个要注意spring版本,3.x和4.x配置不同
解决办法: spring3.x是org.springframework.http.converter.json.MappingJacksonHttpMessageConverter spring4.x是org.springframework.http.converter.json.MappingJackson2HttpMessageConverter
<!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->
<!-- 支持JSON数据格式 -->
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<bean
class="org.springframework.http.converter.ByteArrayHttpMessageConverter" /><!-- 解析导出文件byte流 -->
<ref bean="fastJsonHttpMessageConverter" />
<ref bean="mappingJacksonHttpMessageConverter" />
</list>
</property>
</bean>
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
</bean>
<!-- 使用fastJson来支持JSON数据格式 -->
<bean id="fastJsonHttpMessageConverter"
class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
<value>application/json</value>
</list>
</property>
<property name="features">
<list>
<value>WriteMapNullValue</value>
<value>QuoteFieldNames</value>
</list>
</property>
</bean>