步骤一、从MongoCompass中获取java代码

将java代码复制出来，从MongoCompass中复制的java代码基本格式如下：（是Bson原生格式）

List<Document> list = Arrays.asList(
        new Document("$match",
                new Document("name", "小明")),
        new Document("$sort",
                new Document("age", -1L)),
        new Document("$limit", 20L));

步骤二 、在java项目中使用

private List<Person> testCompassJavaExport() {

    AggregateIterable<Document> aggregate = mongoTemplate.getCollection("person").aggregate(queryList, Document.class);
    List<Person> resultList = new ArrayList<>();
    aggregate.forEach(p -> {
        Person dto = JsonUtils.jsonToObject(p.toJson(), Person.class);
        resultList.add(dto);
    });
    return resultList;

}


// JsonUtils.java
public class JsonUtils {
    public static <T> T jsonToObject(String json, Class<T> clazz) {
        T ret = null;
        if (StringUtils.isNotBlank(json)) {
            try {
                ret = getObjectMapper().readValue(json, clazz);
            } catch (IOException var4) {
                LOGGER.error("Json {} to object failed!", json, var4);
            }
        }

        return ret;
    }
}