springData+mongodb 怎么查询所有并返回指定字段

Question

springData+mongodb 怎么查询所有并返回指定字段

小白请教

Answer 1

原文链接

DBObject obj = new BasicDBObject();
//添加条件
obj.put("times", new BasicDBObject("$eq", 439));

BasicDBObject fieldsObject = new BasicDBObject();
//也可以返回数组内Document的字段
fieldsObject.put("literature.sourceCount", true);
//返回普通字段
fieldsObject.put("paperText", true);
fieldsObject.put("_id", false);

Query query = new BasicQuery( obj.toString(), fieldsObject.toString());
// 注意这里泛型的选择
List<**String**> result = mongoTemplate.find(query, String.class, "CultureCollectionsCount");