Java SQL Table Column getColumnNames(ResultSet rs)

Description

Returns the name of all the columns present in the specified ResultSet

License

Apache License

Parameter

Parameter	Description
rs	the ResultSet to get the column names of

Exception

Parameter	Description
SQLException	See ResultSet#getMetaData(), ResultSetMetaData#getColumnCount(),and ResultSetMetaData#getColumnLabel(int)

Return

list of all the column names in rs (will contain duplicates if multiple columns have the same name)

Declaration

public static List<String> getColumnNames(ResultSet rs) throws SQLException 

Method Source Code

//package com.java2s;
/*//  ww w  .  j a  v a  2  s. c om
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class Main {
    /**
     * Returns the name of all the columns present in the specified {@link ResultSet}
     * @param rs  the {@link ResultSet} to get the column names of
     * @return list of all the column names in {@code rs} (will contain duplicates if multiple columns have the same name)
     * @throws SQLException See {@link ResultSet#getMetaData()}, {@link ResultSetMetaData#getColumnCount()},
     * and {@link ResultSetMetaData#getColumnLabel(int)}
     */
    public static List<String> getColumnNames(ResultSet rs) throws SQLException {
        final ResultSetMetaData metadata = rs.getMetaData();
        final int count = metadata.getColumnCount();
        final List<String> columnNames = new ArrayList<>(count);

        for (int i = 0; i < count; ++i) {
            columnNames.add(metadata.getColumnLabel(i + 1).toLowerCase());
        }

        return columnNames;
    }
}

Related

1. getColumnMetaData(Connection conn, String table, String column)
2. getColumnName(boolean isShowRowNum, ResultSet rs)
3. getColumnName(ResultSetMetaData meta, int column)
4. getColumnNames(final ResultSet resultSet)
5. getColumnNames(ResultSet resultSet_)
6. getColumnNames(ResultSet rs)
7. getColumnNames(ResultSet rs)
8. getColumnNamesFromResultSet(ResultSet rs)
9. getColumns(ResultSetMetaData rsmd)