处理后台向前台传递的json数据

在pom文件中添加下面三种依赖jar包

    <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-annotations</artifactId>
       <version>2.9.8</version>
     </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-core</artifactId>
       <version>2.9.8</version>
     </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-databind</artifactId>
       <version>2.9.8</version>
     </dependency>

spring.xml中加入以下bean

     <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
         <property name="messageConverters">
             <list>
                 <ref bean="mappingJacksonHttpMessageConverter" />
             </list>
         </property>
     </bean>
     <bean id="mappingJacksonHttpMessageConverter"
           class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
         <property name = "supportedMediaTypes">
             <list>
                 <bean class="org.springframework.http.MediaType">
                     <constructor-arg index="0" value="text"/>
                     <constructor-arg index="1" value="plain"/>
                     <constructor-arg index="2" value="UTF-8"/>
                 </bean>
                 <bean class="org.springframework.http.MediaType">
                     <constructor-arg index="0" value="*"/>
                     <constructor-arg index="1" value="*"/>
                     <constructor-arg index="2" value="UTF-8"/>
                 </bean>
                 <bean class="org.springframework.http.MediaType">
                     <constructor-arg index="0" value="text"/>
                     <constructor-arg index="1" value="*"/>
                     <constructor-arg index="2" value="UTF-8"/>
                 </bean>
                 <bean class="org.springframework.http.MediaType">
                     <constructor-arg index="0" value="application"/>
                     <constructor-arg index="1" value="json"/>
                     <constructor-arg index="2" value="UTF-8"/>
                 </bean>
             </list>
         </property>
     </bean>

具体这里的bean的意思，后期更新