Map util JooqMaps

1. Bean → Map

Method	Description
toSnakeCase(Object bean)	Convert Bean to Map with snake_case keys; null values are omitted
toSnakeCaseWithNull(Object bean)	Convert Bean to Map with snake_case keys; null values are preserved
toCamelCase(Object bean)	Convert Bean to Map with camelCase keys; null values are omitted
toCamelCaseWithNull(Object bean)	Convert Bean to Map with camelCase keys; null values are preserved

2. Map Key-Value Operations

Method	Description
removeNulls(Map map)	Remove all entries with null values (mutates the original Map)
filterNulls(Map map)	Return a new Map with null-valued entries removed
putEntries(Map map, Object... keyValues)	Batch-put key-value pairs (mutates the original Map)
withEntries(Map map, Object... keyValues)	Batch-put key-value pairs and return a new Map
removeKeys(Map map, Object... keys)	Remove specified keys (mutates the original Map)
excludeKeys(Map map, Object... keys)	Remove specified keys and return a new Map
removeKeysIgnoreCase(Map map, Object... keys)	Remove keys ignoring case
excludeKeysIgnoreCase(Map map, Object... keys)	Remove keys ignoring case and return a new Map

3. Map Key Naming Conversion

Method	Description
toSnakeCase(Map map)	Convert all keys from camelCase to snake_case (e.g. userName → user_name)
toCamelCase(Map map)	Convert all keys from snake_case to camelCase (e.g. user_name → userName)
toLowerCase(Map map)	Convert all keys to lowercase

example:

// Bean to snake_case Map
Map values = JooqMaps.toSnakeCaseWithNull(user);
values.remove("id");

// Add extra fields
JooqMaps.putEntries(values, "create_time", LocalDateTime.now());

// Filter null values
Map nonNull = JooqMaps.filterNulls(values);

// Remove keys
JooqMaps.removeKeys(values, "id", "create_time");