org.bson

接口 BSONObject

所有已知子接口:

DBObject

所有已知实现类:

BasicBSONList, BasicBSONObject, BasicDBList, BasicDBObject, CommandResult, GridFSDBFile, GridFSFile, GridFSInputFile, LazyBSONList, LazyBSONObject, LazyDBList, LazyDBObject, ReflectionDBObject

public interface BSONObject

A key-value map that can be saved to the database.

方法概要

限定符和类型	方法和说明
boolean	containsField(java.lang.String s) Checks if this object contains a field with the given name.
boolean	containsKey(java.lang.String key) 已过时。 Please use containsField(String) instead
java.lang.Object	get(java.lang.String key) Gets a field from this object by a given name.
java.util.Set<java.lang.String>	keySet() Returns this object's fields' names
java.lang.Object	put(java.lang.String key, java.lang.Object v) Sets a name/value pair in this object.
void	putAll(BSONObject o) Sets all key/value pairs from an object into this object
void	putAll(java.util.Map m) Sets all key/value pairs from a map into this object
java.lang.Object	removeField(java.lang.String key) Removes a field with a given name from this object.
java.util.Map	toMap() Returns a map representing this BSONObject.

方法详细资料

put

java.lang.Object put(java.lang.String key,
                     java.lang.Object v)

Sets a name/value pair in this object.

参数:

key - Name to set

v - Corresponding value

返回:

the previous value associated with key, or null if there was no mapping for key. (A null return can also indicate that the map previously associated null with key.)

putAll

void putAll(BSONObject o)

Sets all key/value pairs from an object into this object

参数:

o - the object

putAll

void putAll(java.util.Map m)

Sets all key/value pairs from a map into this object

参数:

m - the map

get

java.lang.Object get(java.lang.String key)

Gets a field from this object by a given name.

参数:

key - The name of the field fetch

返回:

The field, if found

toMap

java.util.Map toMap()

Returns a map representing this BSONObject.

返回:

the map

removeField

java.lang.Object removeField(java.lang.String key)

Removes a field with a given name from this object.

参数:

key - The name of the field to remove

返回:

The value removed from this object

containsKey

@Deprecated
boolean containsKey(java.lang.String key)

已过时。 Please use containsField(String) instead

Deprecated

参数:

key - the key to check

返回:

True if the key is present

containsField

boolean containsField(java.lang.String s)

Checks if this object contains a field with the given name.

参数:

s - Field name for which to check

返回:

True if the field is present

keySet

java.util.Set<java.lang.String> keySet()

Returns this object's fields' names

返回:

The names of the fields in this object