fastjson转对象的一些属性设置

    <bean 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>
                        <value>WriteNullListAsEmpty</value>
                        <value>WriteNullStringAsEmpty</value>
                        <value>WriteNullNumberAsZero</value>
                        <value>DisableCircularReferenceDetect</value>
                    </list>
                </property>
            </bean>

    QuoteFieldNames----------输出key时是否使用双引号,默认为true
    WriteMapNullValue--------是否输出值为null的字段,默认为false
    WriteNullNumberAsZero----数值字段如果为null,输出为0,而非null
    WriteNullListAsEmpty-----List字段如果为null,输出为[],而非null
    WriteNullStringAsEmpty---字符类型字段如果为null,输出为"",而非null
    WriteNullBooleanAsFalse--Boolean字段如果为null,输出为false,而非null