有些model，里面很多属性是null，我们希望过滤掉为null的属性，比如 a = null, b = "kk"，传递到前台的只有{"b":"kk"}
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<mvc:annotation-driven>
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<!-- 强化参数接收 -->
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<mvc:argument-resolvers>
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<bean class="org.durcframework.common.form.FormModelMethodArgumentResolver" />
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</mvc:argument-resolvers>
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<mvc:message-converters>
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<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
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<property name="objectMapper">
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<bean class="com.fasterxml.jackson.databind.ObjectMapper">
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<!-- 处理responseBody 里面日期类型 -->
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<property name="dateFormat">
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<bean class="java.text.SimpleDateFormat">
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<constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss" />
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</bean>
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</property>
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<!-- 为null字段时不显示 -->
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<property name="serializationInclusion">
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<value type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_NULL</value>
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</property>
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</bean>
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</property>
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</bean>
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</mvc:message-converters>
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</mvc:annotation-driven>
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<mvc:message-converters register-defaults="true">
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<bean
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class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
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<property name="prefixJson" value="false" />
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<property name="supportedMediaTypes" value="application/json" />
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<property name="objectMapper">
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<bean class="com.fasterxml.jackson.databind.ObjectMapper">
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<property name="serializationInclusion">
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<value type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_NULL</value>
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</property>
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</bean>
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</property>
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</bean>
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</mvc:message-converters>
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