[springMVC]利用fastjson返回

左手的ㄟ右手 2023-06-06 03:42 1阅读 0赞

原因:  
1.jackjson无法处理嵌套的entity关系;例:entity:A中包含entity:B,B中又有C;  
2.fastjson性能优越;  
3.把fastjson用于memached缓存对象数据;

# 使用方法: #

## 一:配置文件 ##

<mvc:annotation-driven>
            <mvc:message-converters>
                <ref bean="mappingFastJsonHttpMessageConverter"/>
            </mvc:message-converters>
        </mvc:annotation-driven>
    <bean id="mappingFastJsonHttpMessageConverter"
              class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
            <property name="supportedMediaTypes">
                <list>
                    <value>application/json;charset=UTF-8</value>
                </list>
            </property>
            <property name="fastJsonConfig">
                <bean class="com.alibaba.fastjson.support.config.FastJsonConfig">
                    <property name="dateFormat" value="yyyy-MM-dd HH:mm:ss"/>
                    <property name="serializerFeatures">
                        <list>
                           	 
    					     <value>QuoteFieldNames</value>
    					     
    					     
    					     
    					     
    					     
    					     <value>WriteNullNumberAsZero</value>
    					     
    					     
    					     <value>WriteNullListAsEmpty</value>
    					     
    					     
    					     <value>WriteNullStringAsEmpty</value>
    					     
    					     
    					     <value>WriteNullBooleanAsFalse</value>
    					     
    					     
    					     <value>WriteNullStringAsEmpty</value>
    					     
    					     
    					     
    					
    					     
    					     <value>WriteDateUseDateFormat</value>
                        </list>
                    </property>
                </bean>
            </property>
        </bean>

注:当属性值为空的时候，fastjson默认是不输出的;

## 代码注释: ##

@JSONField(name = "operator")
    private String operation="test";
    
    @JSONField(format = "yyyy-MM-dd HH:mm:ss")
    private Date createTime;
    
    //name:json串:"**operator**:test,createTime:'2019-09-21 15:05:31'"
    //ordinal:排序,数字越小越前;
    //serialize:若serialize = false,序列化时过滤该字段;
    //deserialize:若deserialize = false,反序列化时过滤该字段;

注:fastjson的赋值是用get/set方法,和注解无关;