json格式java与数据库的转换、扫描包下类的相关信息

@TableField(value = "bsm",typeHandler = JacksonTypeHandler.class)

<resultMap id="vxDevice" type="cn.dxsc.v2x.device.entity.deviceconfig.service.ServiceConfigMidd">

    <result column="spat" property="spatConfig" typeHandler="com.baomidou.mybatisplus.extension.handlers.JacksonTypeHandler"/>
   
</resultMap>

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 扫描相关包下或者类的信息：

/**
 * 自动扫描指定包内所有带 NonStructuredMsg 注解的类
 */
@Bean
public void searchMsgObject(){
    ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();
    final String resourcePattern = "/**/*.class";
    try {
        String pattern = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX +
                ClassUtils.convertClassNameToResourcePath(PACKAGE_NAME_DATA_OBJECT) + resourcePattern;
        Resource[] resources = resourcePatternResolver.getResources(pattern);
        //MetadataReader 的工厂类
        MetadataReaderFactory readerFactory = new CachingMetadataReaderFactory(resourcePatternResolver);
        for (Resource resource : resources) {
            //用于读取类信息
            MetadataReader reader = readerFactory.getMetadataReader(resource);
            //扫描到的class
            String classname = reader.getClassMetadata().getClassName();
            Class<?> clazz = Class.forName(classname);
            //判断是否有指定注解
            try {
                if (clazz.isAnnotationPresent(NonStructuredMsg.class)) {
                    NonStructuredMsg nonStructuredMsgInfo = clazz.getDeclaredAnnotation(NonStructuredMsg.class);
                    GetDataUtil.symbolClassMap.put(nonStructuredMsgInfo.symbol(),clazz);
                    GetDataUtil.classNameMsgMap.put(clazz.getName(), nonStructuredMsgInfo);
                }
            }catch (Exception ignored){
            }
        }
    } catch (IOException | ClassNotFoundException e) {
        e.printStackTrace();
    }
}