Java SQL Table Column resultSetToOneColumnAsList(ResultSet rs)

Description

result Set To One Column As List

License

Apache License

Declaration

public static List<Object> resultSetToOneColumnAsList(ResultSet rs) throws Exception 

Method Source Code

//package com.java2s;
/*// www.j  a  v a  2 s .c om
 * Copyright 2012 University of Southern California
 * 
 * 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.util.ArrayList;
import java.util.List;

public class Main {
    public static List<Object> resultSetToOneColumnAsList(ResultSet rs) throws Exception {
        if (rs == null)
            return null;

        try {
            ResultSetMetaData metaData = rs.getMetaData();
            int numberOfColumns = metaData.getColumnCount();
            //System.out.println("numberOfColumns:"+ numberOfColumns);

            if (numberOfColumns > 1)
                return null;

            List<Object> rows = new ArrayList<Object>(numberOfColumns);
            // Get the column names
            for (int column = 0; column < numberOfColumns; column++) {
                rows.add((metaData.getColumnLabel(column + 1)));
            }
            // Get all rows
            while (rs.next()) {
                for (int i = 1; i <= numberOfColumns; i++) {
                    if (rs.getObject(i) == null)
                        return null;
                    rows.add(rs.getString(i));
                }
            }
            return rows;
        } catch (Exception e) {
            e.printStackTrace();
            throw new Exception(e);
        }
    }
}

Related

1. readStringFromBlob(ResultSet resultSet, String columnLabel)
2. resultSetAsCount(ResultSet rs, String countColumn)
3. resultSetContainsColumn(ResultSet rs, String column)
4. resultSetHasColumn(ResultSet rs, String sColumnName)
5. resultSetToOneColumnAsCommamaSeparatedString(ResultSet rs)
6. resultSetToStringFormat(ResultSet rs, String separator, String quote, boolean column)
7. resultSetValue(ResultSet resultSet, Class parameterClass, Object object, String columnLabel)
8. retrieveCoulmns(String tableName, String columnArray[], Statement statement, long offset, long numberOfRecords)
9. tableContainsColumn(Connection conn, String table, String column)