[英]How to remove the key/value pair from a List<Map<String, Object>>
[英]Remove Key value pair from map of given object value in java
如何從Java映射中刪除給定對象值的元素。
樣本數據:
{
3cc612eqwdwc3-4dce-11e7-b4a2-fe984uyucc15272:[code=5
user_key=dcfb5f5f-588e-11e6-85b9-fe984cc15272
message=You have successfully logged in...
roles_name=PLATFORM_ADMIN
access_token=3cc612c3-4dce-11e7-b4a2-fe984cc15272
user_id=superadmin
utc_time=2017-06-10 11:16:23.0
roles_id=7
token_type=0
access_key=d3cd4e3f-5946-11e6-9bb0-fe984cc15272
status=true
is_valid=null
]
3cc61fdfff2c3-4dce-11e7-b4atuy2-fe984cc15272:[code=5
user_key=dcfb5f5f-588e-11e6-85b9-fe984cc15272
message=You have successfully logged in...
roles_name=PLATFORM_ADMIN
access_token=3cc612c3-4dce-11e7-b4a2-fe984cc15272
user_id=superadmin
utc_time=2017-06-10 11:16:23.0
roles_id=7
token_type=0
access_key=d3cd4e3f-5946-11e6-9bb0-fe984cc15272
status=true
is_valid=null
]
3cc612cddf3-4dce-11e7-b4a562-fe984cc15272:[code=5
user_key=dcfb5f5f-5ddd88e-11e6-85b9-fe984cc15272
message=You have successfully logged in...
roles_name=PLATFORM_ADMIN
access_token=3cc612c3-4dce-11e7-b4a2-fe984cc15272
user_id=superadmin
utc_time=2017-06-10 11:16:23.0
roles_id=7
token_type=0
access_key=d3cd4e3f-5946-11e6-9bb0-fe984cc15272
status=true
is_valid=null
]
3cc6f12c3-4dce-11e7-b4oopa2d-fe984cc15272:[code=5
user_key=dcfb5f5f-588e-11e6-85b9-fe984cc15272
message=You have successfully logged in...
roles_name=PLATFORM_ADMIN
access_token=3cc612c3-4dce-11e7-b4a2-fe984cc15272
user_id=superadmin1
utc_time=2017-06-10 11:16:23.0
roles_id=7
token_type=0
access_key=d3cd4e3f-5946-11e6-9bb0-fe984cc15272
status=true
is_valid=null
]
3cc61vc2c3-4dcdse-11ep[7-b4a2-fe984cc15272:[code=5
user_key=dcfb5f5f-5ddd88e-11e6-85b9-fe984cc15272
message=You have successfully logged in...
roles_name=PLATFORM_ADMIN
access_token=3cc612c3-4dce-11e7-b4a2-fe984cc15272
user_id=superadmin1
utc_time=2017-06-10 11:16:23.0
roles_id=7
token_type=0
access_key=d3cd4e3f-5946-11e6-9bb0-fe984cc15272
status=true
is_valid=null
]
}
對於上述示例數據,有沒有辦法刪除所有包含對象值user_key=dcfb5f5f-588e-11e6-85b9-fe984cc15272
地圖元素,而無需使用循環或其他一些優化方法。
我已經嘗試過使用remove()
方法,但是它只能使用key刪除。
好吧,可能我不正確。 但似乎您無法按鍵或值刪除。 我建議改用過濾。 基於Java8的偽代碼:
Map<Key, Value> filteredMap = map.entrySet()
.stream()
.filter(e -> !e.getValue().getUserKey().equals("dcfb5f5f-588e-11e6-85b9-fe984cc15272"))
.collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue()));
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