ObjectMapper 读数据异常的问题（未解决）

	public static void main(String[] args) {
		ObjectMapper mapper = new ObjectMapper();
		mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
		mapper.enableDefaultTyping(NON_FINAL);


		Meta meta = new Meta();
		meta.setFilters(new Meta.FilterGroups());
		meta.setPagination(new PageInfo());
		meta.setPrecisions(Lists.newArrayList(new ReportPrecision()));

		byte[] bytes = mapper.writeValueAsBytes(meta);
		//String s = mapper.writeValueAsString(meta);

		Object o = mapper.readValue(bytes, 0, bytes.length, Object.class);
		//System.out.println(new String(s));
		System.out.println(o);
	}

出错信息为

Exception in thread "main" com.fasterxml.jackson.databind.exc.InvalidTypeIdException: Could not resolve type id 'com.gunma.report.bean.req.query.BaseGroup' as a subtype of [collection type; class java.util.List, contains [simple type, class com.gunma.report.entity.report.ReportPrecision]]: Not a subtype
 at [Source: (byte[])"["com.gunma.report.bean.req.query.Meta",{"stats":null,"pagination":["com.github.pagehelper.PageInfo",{"total":0,"list":null,"pageNum":0,"pageSize":0,"size":0,"startRow":0,"endRow":0,"pages":0,"prePage":0,"nextPage":0,"isFirstPage":false,"isLastPage":false,"hasPreviousPage":false,"hasNextPage":false,"navigatePages":0,"navigatepageNums":null,"navigateFirstPage":0,"navigateLastPage":0}],"precisions":["com.gunma.report.bean.req.query.BaseGroup",{"fieldKey":"precision","fieldName":"精度","options":"[truncated 417 bytes]; line: 1, column: 446] (through reference chain: com.gunma.report.bean.req.query.Meta["precisions"])

Meta是自定义的一个类，如果读取List、Map 不会出问题。