spring 配置controller返回json

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applicationContext.xml配置

<!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->    <bean        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">        <property name="messageConverters">            <list>                <ref bean="stringHttpMessageConverter" />                <ref bean="mappingJacksonHttpMessageConverter" />            </list>        </property>    </bean>   <!--编码转换器-->    <bean id="stringHttpMessageConverter"        class="org.springframework.http.converter.StringHttpMessageConverter">        <property name="supportedMediaTypes">            <list>                <value>text/plain;charset=UTF-8</value>            </list>        </property>    </bean>     <!-- 让controller 返回json的配置 -->    <bean id="mappingJacksonHttpMessageConverter"        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">        <property name="supportedMediaTypes">            <list>                <value>text/html;charset=UTF-8</value>                <value>application/json;charset=UTF-8</value>            </list>        </property>    </bean>

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