> returnMap = new HashMap(); //队列中最早的时间 Date firstTransTime = null; Queue mintuesQueue = new LinkedList(); Integer key = 1; for (DBObject dbObject : list)...{ if (mintuesQueue.size() == 0){ mintuesQueue.offer(dbObject);...continue; } DBObject start = mintuesQueue.peek(); firstTransTime...= (Date) start.get(transTimeKey); Date currentTransTime = (Date) dbObject.get(transTimeKey
import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject...)); } /** * 查找集合所有对象 * * @param collection */ public static List findAll(String...findOne(String collection, DBObject q) { return getCollection(collection).findOne(q); } /**...findOne(String collection, DBObject q, DBObject fileds) { return getCollection(collection).findOne...> findLess(String collection, DBObject q, DBObject fileds, int pageNo, int perPageCount) { return
; } catch (UnknownHostException e) { e.printStackTrace(); } return null; } public static DBObject... getDBCursorFromJson(String jsondata){ return (DBObject) JSON.parse(jsondata); } public static String... getStringDataFromDBObject(DBObject entry){ return JSON.serialize(entry); } } 下面测试简单的CRUD package...org.junit.Test public void testAdd(){ DBCollection collection=DBUtil.getDBCollection("testtable"); DBObject...DBCollection collection=DBUtil.getDBCollection("testtable"); DBObject user=new BasicDBObject(); user.put
"\t" + studentResult.getCount()); } 按照原始的语句，用框架的语法拼出来就可以了 当然还有的小伙伴还是用习惯了java驱动的写法，也可以，就是没上面简洁 List pipeline = new ArrayList(); BasicDBObject group = new BasicDBObject(); group.put("$group"...AggregationOutput output = mongoTemplate.getCollection("article_info").aggregate(pipeline); Iterable iterable = output.results(); for (DBObject dbObject : iterable) { System.out.println(dbObject)
dbObject = new BasicDBObject(); dbObject.putAll(param); String collectionName = EnumBpd.getBpdType...dbObject = new BasicDBObject(); dbObject.putAll(param); list.add(dbObject...> list = dbCursor.toArray(); for (DBObject dbObject: list){ searchList.add(dbObject.toMap...=null && dbCursor.size()>0){ for (DBObject dbObject: list){ searchList.add...dbObject = mongoDao.findOne(query,collectionName); if(dbObject!
dbObject; try { dbObject = collection.findOne(new BasicDBObject(keystr, value)); log.debug("...dbObject1:" + dbObject); if (dbObject == null) { db = this.switchCluster().getDB(); collection...)); log.debug("dbObject1-2:" + dbObject); } } catch (MongoException e) { db = this.switchCluster...(keystr, value)); log.debug("dbObject2:" + dbObject); } return dbObject; } 前台通过DBCollection...("column_name", inObj)); DBObject dbObj = null; while (cursor.hasNext()) { dbObj = cursor.next
com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject...DBCollection dbCollection = db.getCollection(“person”); // BasicDBObject dbObject...=new BasicDBObject(); dbObject.put(“title”,“奔放洋气有深度，简约时尚国际范“); dbObject.put(“...dbObject =new BasicDBObject(); dbCollection.remove(dbObject); } /**...(); while (cursor.hasNext()) { DBObject dbObject2 = cursor.next();
import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject...forum.ithomer.net"); obj.put("subject", "ithomer.net"); collection.insert(obj); // 插入对象 DBObject...= getTagInt(tagList.get(j)); mediaEntity.addTag(tagId); } // actors ArrayList actorsObjList = (ArrayList)obj.get("actors"); // actors for(int j=0; j<actorsObjList.size...cursor == null || cursor.toArray().size() <= 0) { // 处理小于2或n的映射关键字，下同 return tagIntId; } DBObject
在MongoDB中是文档存储的，也就是模式自由的，我们所取到的文档中实际上就是MongoDB中的类，DBObject(接口)BasicDBObject(实现类),这是查询获得的结果，是一种K-V结构的。...: "MongoDB" , "type" : "database" , "count" : 1 , "info" : { "x" : 203 , "y" : 102}} DBObject...BasicDBObject update = new BasicDBObject(); update.put("i", 710); DBObject...BasicDBObject("i", 1)); // create index on "i", ascending //获取索引列表 List list = collection.getIndexInfo(); for (DBObject o : list) { System.out.println
//test为数据库的名称 DBCollection coll = db.getCollection(“test”)//test为集合名称 //下面则就行构造管道中操作节点的操作符,主要用到的对象就是DBObject...DBObject match = new BasicDBObject("$match", new BasicDBObject("字段名", "字段值"));//限定查询条件，相当于Query,规定某个字段的值进行...groupby DBObject groupFields = new BasicDBObject(“_id”,”$字段名”);//也就是说groupby这个字段名 groupFields.put(“SumElectricty...DBObject group = new BasicDBObject(“$group”,groupFields); //放到管道中将这些节点运算符运算起来 AggregationOutput output...DBCollection coll = mongoTemplate.getCollection("smartsocketer");//获得名为smartsocketer的集合 DBObject
collection.count(); ---- 查询所有数据 DBCursor cursor = collection.find();while (cursor.hasNext()) { DBObject...data = cursor.next(); System.out.println(data.toString()); } ---- 查询第一条数据 DBObject data = collection.findOne...(); ---- 带条件查询 DBObject query = new BasicDBObject("author", "yinjihuan"); cursor = collection.find(query...10)); cursor = collection.find(query); ---- 查询固定的列 query = new BasicDBObject("author", "yinjihuan"); DBObject
DBObject myDoc = coll.findOne(); System.out.println(myDoc); 返回类似： { "_id" : "ac907a1f5b9d5e4a233ed300...coll.createIndex(new BasicDBObject("i", 1)); 13 获取索引列表 List list = coll.getIndexInfo(); for...(DBObject o : list){ System.out.println(o); } 14 MongoDB管理函数 管理函数在com.mongodb.MongoAdmin类中定义。...DBObject{ /*...*/ } 可以使用如下代码： Tweet myTweet = new Tweet(); myTweet.put("user", userId); myTweet.put...message); myTweet.put("date", new Date()); collection.insert(myTweet); 当一个文档从MongoDB中取出时，它会自动把文档转换成DBObject
import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject...)) { print(cur.next()); } } public static void remove(String name, int age, String sex){ DBObject...userInfos.remove(userInfo); } public static void add(String name, int age, String sex) { DBObject
com.mongodb.DB; 6 import com.mongodb.DBCollection; 7 import com.mongodb.DBCursor; 8 import com.mongodb.DBObject...emp"); 44 45 // delete all 46 DBCursor dbCursor = coll.find(); 47 for (DBObject...dbObject : dbCursor) { 48 coll.remove(dbObject); 49 } 50 51 // create...对象 92 * 93 * @param obj 94 * @return 95 */ 96 private DBObject toDBObject...97 Gson gson = new Gson(); 98 String json = gson.toJson(obj); 99 return (DBObject
DBObject groupFields = new BasicDBObject("\_id", null); groupFields.put("count", new BasicDBObject("$...aggreList.add(group); AggregateIterable output = collection.aggregate(aggreList); for (Document dbObject...: output) { System.out.println("Aggregates count = "+ dbObject); } 参考 MongoDB：count 结果不准确的原因与解决方法
dbobject就是IDB的静态对象，属性和方法中的第一层方法，都是和IDB接口对应的，一方面这些方法本身就是通用性强、常用的方法，另一方面，刻意把这些方法和IDB的接口方法保持一致，这样，用户在自行创建...三种主要操作 1、查询数据集 调用IDB接口对象dbobject中的GetData方法，将数据返回。...//数据库的查询方法 public static DataTable GetData(string sqlstr) { CheckDBObj(); //检查对象是否存在 return dbobject.GetData...(sqlstr); } 其中dbobject是根据连接所创建的具体的实现类。...public static DBResult DoNonQuery(string sqlstr) { CheckDBObj(); //检查对象是否存在 return dbobject.DoNonQuery
public class Database { private static final Database dbObject = new Database(); private volatile...String data; private Database() { } public static Database getInstance() { return dbObject...(obj)); } } 为了更好地排查问题，我们在打印语句中打印类加载器： public class Database { private static final Database dbObject...String data; private Database() { } public static Database getInstance() { return dbObject
context.getMappedObject(operation); } // Spring-data-mongodb 2.0以下使用com.mongodb.BasicDBObject @Override public DBObject...DBObject operation = new DBObject ( "$addFields", new DBObject (newField
DBCollection dbCollection, String collName, List options, boolean ordered) { DBObject...collName.substring(0, 1).toLowerCase()) ; } return collName; } 核心其实就在于用collection执行command方法，然后将修语句转成DBObject
可以使用DBObject生成查找条件， ? 七、更新文档 ? 上面的语句将i为70的文档更新i的值等于100。...八、删除文档 可以通过生成一个DBObject对象来删除指定的文档，例如： ? 上面的语句删除i为71的文档。
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