Package com.alibaba.druid.filter.mysql8datetime

Class MySQL8DateTimeSqlTypeFilter

java.lang.Object

javax.management.NotificationBroadcasterSupport

com.alibaba.druid.filter.FilterAdapter

com.alibaba.druid.filter.mysql8datetime.MySQL8DateTimeSqlTypeFilter

All Implemented Interfaces:

Filter, Wrapper, NotificationBroadcaster, NotificationEmitter

public class MySQL8DateTimeSqlTypeFilter
extends FilterAdapter

针对mysql jdbc 8.0.23及以上版本，如果调用方没有使用orm框架，而是直接调用ResultSet的getObject方法，则针对DATETIME类型的字段，得到的对象从TimeStamp类型变成了LocalDateTime类型，导致调用方出现类型转换异常 通过Filter控制将对象类型转换成原来的类型

Author:

lizongbo

See Also:

• MySQL 8.0.23 更新说明

Constructor Summary

Constructors

Constructor	Description
MySQL8DateTimeSqlTypeFilter()

Method Summary

Modifier and Type	Method	Description
static Object	getObjectReplaceLocalDateTime(Object obj)	Replaces a LocalDateTime object with its equivalent Timestamp object.
ResultSetMetaData	resultSet_getMetaData(FilterChain chain, ResultSetProxy resultSet)	Retrieves the metadata for the result set, including information about the columns and their properties.
Object	resultSet_getObject(FilterChain chain, ResultSetProxy result, int columnIndex)	针对mysql jdbc 8.0.23及以上版本，通过该方法控制将对象类型转换成原来的类型
Object	resultSet_getObject(FilterChain chain, ResultSetProxy result, String columnLabel)	针对mysql jdbc 8.0.23及以上版本，通过该方法控制将对象类型转换成原来的类型

Methods inherited from class com.alibaba.druid.filter.FilterAdapter

callableStatement_getArray, callableStatement_getArray, callableStatement_getBigDecimal, callableStatement_getBigDecimal, callableStatement_getBigDecimal, callableStatement_getBlob, callableStatement_getBlob, callableStatement_getBoolean, callableStatement_getBoolean, callableStatement_getByte, callableStatement_getByte, callableStatement_getBytes, callableStatement_getBytes, callableStatement_getCharacterStream, callableStatement_getCharacterStream, callableStatement_getClob, callableStatement_getClob, callableStatement_getDate, callableStatement_getDate, callableStatement_getDate, callableStatement_getDate, callableStatement_getDouble, callableStatement_getDouble, callableStatement_getFloat, callableStatement_getFloat, callableStatement_getInt, callableStatement_getInt, callableStatement_getLong, callableStatement_getLong, callableStatement_getNCharacterStream, callableStatement_getNCharacterStream, callableStatement_getNClob, callableStatement_getNClob, callableStatement_getNString, callableStatement_getNString, callableStatement_getObject, callableStatement_getObject, callableStatement_getObject, callableStatement_getObject, callableStatement_getRef, callableStatement_getRef, callableStatement_getRowId, callableStatement_getRowId, callableStatement_getShort, callableStatement_getShort, callableStatement_getSQLXML, callableStatement_getSQLXML, callableStatement_getString, callableStatement_getString, callableStatement_getTime, callableStatement_getTime, callableStatement_getTime, callableStatement_getTime, callableStatement_getTimestamp, callableStatement_getTimestamp, callableStatement_getTimestamp, callableStatement_getTimestamp, callableStatement_getURL, callableStatement_getURL, callableStatement_registerOutParameter, callableStatement_registerOutParameter, callableStatement_registerOutParameter, callableStatement_registerOutParameter, callableStatement_registerOutParameter, callableStatement_registerOutParameter, callableStatement_setAsciiStream, callableStatement_setAsciiStream, callableStatement_setAsciiStream, callableStatement_setBigDecimal, callableStatement_setBinaryStream, callableStatement_setBinaryStream, callableStatement_setBinaryStream, callableStatement_setBlob, callableStatement_setBlob, callableStatement_setBlob, callableStatement_setBoolean, callableStatement_setByte, callableStatement_setBytes, callableStatement_setCharacterStream, callableStatement_setCharacterStream, callableStatement_setCharacterStream, callableStatement_setClob, callableStatement_setClob, callableStatement_setClob, callableStatement_setDate, callableStatement_setDate, callableStatement_setDouble, callableStatement_setFloat, callableStatement_setInt, callableStatement_setLong, callableStatement_setNCharacterStream, callableStatement_setNCharacterStream, callableStatement_setNClob, callableStatement_setNClob, callableStatement_setNClob, callableStatement_setNString, callableStatement_setNull, callableStatement_setNull, callableStatement_setObject, callableStatement_setObject, callableStatement_setObject, callableStatement_setRowId, callableStatement_setShort, callableStatement_setSQLXML, callableStatement_setString, callableStatement_setTime, callableStatement_setTime, callableStatement_setTimestamp, callableStatement_setTimestamp, callableStatement_setURL, callableStatement_wasNull, clob_free, clob_getAsciiStream, clob_getCharacterStream, clob_getCharacterStream, clob_getSubString, clob_length, clob_position, clob_position, clob_setAsciiStream, clob_setCharacterStream, clob_setString, clob_setString, clob_truncate, configFromProperties, connection_abort, connection_clearWarnings, connection_close, connection_commit, connection_connect, connection_createArrayOf, connection_createBlob, connection_createClob, connection_createNClob, connection_createSQLXML, connection_createStatement, connection_createStatement, connection_createStatement, connection_createStruct, connection_getAutoCommit, connection_getCatalog, connection_getClientInfo, connection_getClientInfo, connection_getHoldability, connection_getMetaData, connection_getNetworkTimeout, connection_getSchema, connection_getTransactionIsolation, connection_getTypeMap, connection_getWarnings, connection_isClosed, connection_isReadOnly, connection_isValid, connection_nativeSQL, connection_prepareCall, connection_prepareCall, connection_prepareCall, connection_prepareStatement, connection_prepareStatement, connection_prepareStatement, connection_prepareStatement, connection_prepareStatement, connection_prepareStatement, connection_releaseSavepoint, connection_rollback, connection_rollback, connection_setAutoCommit, connection_setCatalog, connection_setClientInfo, connection_setClientInfo, connection_setHoldability, connection_setNetworkTimeout, connection_setReadOnly, connection_setSavepoint, connection_setSavepoint, connection_setSchema, connection_setTransactionIsolation, connection_setTypeMap, dataSource_getConnection, dataSource_releaseConnection, destroy, init, isWrapperFor, isWrapperFor, preparedStatement_addBatch, preparedStatement_clearParameters, preparedStatement_execute, preparedStatement_executeQuery, preparedStatement_executeUpdate, preparedStatement_getMetaData, preparedStatement_getParameterMetaData, preparedStatement_setArray, preparedStatement_setAsciiStream, preparedStatement_setAsciiStream, preparedStatement_setAsciiStream, preparedStatement_setBigDecimal, preparedStatement_setBinaryStream, preparedStatement_setBinaryStream, preparedStatement_setBinaryStream, preparedStatement_setBlob, preparedStatement_setBlob, preparedStatement_setBlob, preparedStatement_setBoolean, preparedStatement_setByte, preparedStatement_setBytes, preparedStatement_setCharacterStream, preparedStatement_setCharacterStream, preparedStatement_setCharacterStream, preparedStatement_setClob, preparedStatement_setClob, preparedStatement_setClob, preparedStatement_setDate, preparedStatement_setDate, preparedStatement_setDouble, preparedStatement_setFloat, preparedStatement_setInt, preparedStatement_setLong, preparedStatement_setNCharacterStream, preparedStatement_setNCharacterStream, preparedStatement_setNClob, preparedStatement_setNClob, preparedStatement_setNClob, preparedStatement_setNString, preparedStatement_setNull, preparedStatement_setNull, preparedStatement_setObject, preparedStatement_setObject, preparedStatement_setObject, preparedStatement_setRef, preparedStatement_setRowId, preparedStatement_setShort, preparedStatement_setSQLXML, preparedStatement_setString, preparedStatement_setTime, preparedStatement_setTime, preparedStatement_setTimestamp, preparedStatement_setTimestamp, preparedStatement_setUnicodeStream, preparedStatement_setURL, resultSet_absolute, resultSet_afterLast, resultSet_beforeFirst, resultSet_cancelRowUpdates, resultSet_clearWarnings, resultSet_close, resultSet_deleteRow, resultSet_findColumn, resultSet_first, resultSet_getArray, resultSet_getArray, resultSet_getAsciiStream, resultSet_getAsciiStream, resultSet_getBigDecimal, resultSet_getBigDecimal, resultSet_getBigDecimal, resultSet_getBigDecimal, resultSet_getBinaryStream, resultSet_getBinaryStream, resultSet_getBlob, resultSet_getBlob, resultSet_getBoolean, resultSet_getBoolean, resultSet_getByte, resultSet_getByte, resultSet_getBytes, resultSet_getBytes, resultSet_getCharacterStream, resultSet_getCharacterStream, resultSet_getClob, resultSet_getClob, resultSet_getConcurrency, resultSet_getCursorName, resultSet_getDate, resultSet_getDate, resultSet_getDate, resultSet_getDate, resultSet_getDouble, resultSet_getDouble, resultSet_getFetchDirection, resultSet_getFetchSize, resultSet_getFloat, resultSet_getFloat, resultSet_getHoldability, resultSet_getInt, resultSet_getInt, resultSet_getLong, resultSet_getLong, resultSet_getNCharacterStream, resultSet_getNCharacterStream, resultSet_getNClob, resultSet_getNClob, resultSet_getNString, resultSet_getNString, resultSet_getObject, resultSet_getObject, resultSet_getObject, resultSet_getObject, resultSet_getRef, resultSet_getRef, resultSet_getRow, resultSet_getRowId, resultSet_getRowId, resultSet_getShort, resultSet_getShort, resultSet_getSQLXML, resultSet_getSQLXML, resultSet_getStatement, resultSet_getString, resultSet_getString, resultSet_getTime, resultSet_getTime, resultSet_getTime, resultSet_getTime, resultSet_getTimestamp, resultSet_getTimestamp, resultSet_getTimestamp, resultSet_getTimestamp, resultSet_getType, resultSet_getUnicodeStream, resultSet_getUnicodeStream, resultSet_getURL, resultSet_getURL, resultSet_getWarnings, resultSet_insertRow, resultSet_isAfterLast, resultSet_isBeforeFirst, resultSet_isClosed, resultSet_isFirst, resultSet_isLast, resultSet_last, resultSet_moveToCurrentRow, resultSet_moveToInsertRow, resultSet_next, resultSet_previous, resultSet_refreshRow, resultSet_relative, resultSet_rowDeleted, resultSet_rowInserted, resultSet_rowUpdated, resultSet_setFetchDirection, resultSet_setFetchSize, resultSet_updateArray, resultSet_updateArray, resultSet_updateAsciiStream, resultSet_updateAsciiStream, resultSet_updateAsciiStream, resultSet_updateAsciiStream, resultSet_updateAsciiStream, resultSet_updateAsciiStream, resultSet_updateBigDecimal, resultSet_updateBigDecimal, resultSet_updateBinaryStream, resultSet_updateBinaryStream, resultSet_updateBinaryStream, resultSet_updateBinaryStream, resultSet_updateBinaryStream, resultSet_updateBinaryStream, resultSet_updateBlob, resultSet_updateBlob, resultSet_updateBlob, resultSet_updateBlob, resultSet_updateBlob, resultSet_updateBlob, resultSet_updateBoolean, resultSet_updateBoolean, resultSet_updateByte, resultSet_updateByte, resultSet_updateBytes, resultSet_updateBytes, resultSet_updateCharacterStream, resultSet_updateCharacterStream, resultSet_updateCharacterStream, resultSet_updateCharacterStream, resultSet_updateCharacterStream, resultSet_updateCharacterStream, resultSet_updateClob, resultSet_updateClob, resultSet_updateClob, resultSet_updateClob, resultSet_updateClob, resultSet_updateClob, resultSet_updateDate, resultSet_updateDate, resultSet_updateDouble, resultSet_updateDouble, resultSet_updateFloat, resultSet_updateFloat, resultSet_updateInt, resultSet_updateInt, resultSet_updateLong, resultSet_updateLong, resultSet_updateNCharacterStream, resultSet_updateNCharacterStream, resultSet_updateNCharacterStream, resultSet_updateNCharacterStream, resultSet_updateNClob, resultSet_updateNClob, resultSet_updateNClob, resultSet_updateNClob, resultSet_updateNClob, resultSet_updateNClob, resultSet_updateNString, resultSet_updateNString, resultSet_updateNull, resultSet_updateNull, resultSet_updateObject, resultSet_updateObject, resultSet_updateObject, resultSet_updateObject, resultSet_updateRef, resultSet_updateRef, resultSet_updateRow, resultSet_updateRowId, resultSet_updateRowId, resultSet_updateShort, resultSet_updateShort, resultSet_updateSQLXML, resultSet_updateSQLXML, resultSet_updateString, resultSet_updateString, resultSet_updateTime, resultSet_updateTime, resultSet_updateTimestamp, resultSet_updateTimestamp, resultSet_wasNull, resultSetMetaData_getCatalogName, resultSetMetaData_getColumnClassName, resultSetMetaData_getColumnCount, resultSetMetaData_getColumnDisplaySize, resultSetMetaData_getColumnLabel, resultSetMetaData_getColumnName, resultSetMetaData_getColumnType, resultSetMetaData_getColumnTypeName, resultSetMetaData_getPrecision, resultSetMetaData_getScale, resultSetMetaData_getSchemaName, resultSetMetaData_getTableName, resultSetMetaData_isAutoIncrement, resultSetMetaData_isCaseSensitive, resultSetMetaData_isCurrency, resultSetMetaData_isDefinitelyWritable, resultSetMetaData_isNullable, resultSetMetaData_isReadOnly, resultSetMetaData_isSearchable, resultSetMetaData_isSigned, resultSetMetaData_isWritable, statement_addBatch, statement_cancel, statement_clearBatch, statement_clearWarnings, statement_close, statement_execute, statement_execute, statement_execute, statement_execute, statement_executeBatch, statement_executeQuery, statement_executeUpdate, statement_executeUpdate, statement_executeUpdate, statement_executeUpdate, statement_getConnection, statement_getFetchDirection, statement_getFetchSize, statement_getGeneratedKeys, statement_getMaxFieldSize, statement_getMaxRows, statement_getMoreResults, statement_getMoreResults, statement_getQueryTimeout, statement_getResultSet, statement_getResultSetConcurrency, statement_getResultSetHoldability, statement_getResultSetType, statement_getUpdateCount, statement_getWarnings, statement_isClosed, statement_isPoolable, statement_setCursorName, statement_setEscapeProcessing, statement_setFetchDirection, statement_setFetchSize, statement_setMaxFieldSize, statement_setMaxRows, statement_setPoolable, statement_setQueryTimeout, unwrap, unwrap

Methods inherited from class javax.management.NotificationBroadcasterSupport

addNotificationListener, getNotificationInfo, handleNotification, removeNotificationListener, removeNotificationListener, sendNotification

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MySQL8DateTimeSqlTypeFilter

public MySQL8DateTimeSqlTypeFilter()

Method Details

resultSet_getObject

public Object resultSet_getObject(FilterChain chain,
 ResultSetProxy result,
 int columnIndex)
                           throws SQLException

针对mysql jdbc 8.0.23及以上版本，通过该方法控制将对象类型转换成原来的类型

Specified by:

resultSet_getObject in interface Filter

Overrides:

resultSet_getObject in class FilterAdapter

Parameters:

chain - chain the FilterChain object that represents the filter chain

result - the ResultSetProxy object that represents the result set

columnIndex - the index of the column to retrieve

Returns:

an Object holding the column value, or null if the value is SQL NULL

Throws:

SQLException - if a database access error occurs or the columnIndex is invalid

See Also:

• ResultSet.getObject(int)

resultSet_getObject

public Object resultSet_getObject(FilterChain chain,
 ResultSetProxy result,
 String columnLabel)
                           throws SQLException

针对mysql jdbc 8.0.23及以上版本，通过该方法控制将对象类型转换成原来的类型

Specified by:

resultSet_getObject in interface Filter

Overrides:

resultSet_getObject in class FilterAdapter

Parameters:

chain - chain the FilterChain object that represents the filter chain

result - the ResultSetProxy object that represents the result set

columnLabel - the label of the column to retrieve

Returns:

an Object holding the column value, or null if the value is SQL NULL

Throws:

SQLException - if a database access error occurs or the columnLabel is invalid

See Also:

• ResultSet.getObject(String)

getObjectReplaceLocalDateTime

public static Object getObjectReplaceLocalDateTime(Object obj)

Replaces a LocalDateTime object with its equivalent Timestamp object. If the input object is not an instance of LocalDateTime, it is returned as is. This method is specifically designed to handle cases where upgrading to MySQL JDBC 8.0.23 or above requires converting LocalDateTime objects back to the older compatible type.

Parameters:

obj - the object to be checked and possibly replaced

Returns:

the replaced object if it is a LocalDateTime, or the original object otherwise

resultSet_getMetaData

public ResultSetMetaData resultSet_getMetaData(FilterChain chain,
 ResultSetProxy resultSet)
                                        throws SQLException

Retrieves the metadata for the result set, including information about the columns and their properties. This method wraps the original result set metadata with a custom implementation that handles MySQL 8.0.23 or above compatibility for LocalDateTime objects.

Specified by:

resultSet_getMetaData in interface Filter

Overrides:

resultSet_getMetaData in class FilterAdapter

Parameters:

chain - the FilterChain object that represents the filter chain

resultSet - the ResultSetProxy object that represents the result set

Returns:

a ResultSetMetaData object containing the metadata for the result set

Throws:

SQLException - if a database access error occurs