Java SQL Execute execute(Connection connection, String sql, boolean closeConn)

Description

execute

License

Apache License

Declaration

public static void execute(Connection connection, String sql, boolean closeConn) throws Exception 

Method Source Code

//package com.java2s;
/*//w w w .java 2  s .  c  o  m
 * Copyright 2012-2017 the original author or authors.
 *
 * 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.Connection;

import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;

public class Main {
    public static void execute(Connection connection, String sql, boolean closeConn) throws Exception {

        Statement stmt = null;
        ResultSet rs = null;

        try {
            stmt = connection.createStatement();
            boolean hasResults = stmt.execute(sql);
            if (hasResults) {
                rs = stmt.getResultSet();
                ResultSetMetaData metadata = rs.getMetaData();
                int columns = metadata.getColumnCount();
                for (int row = 1; rs.next(); row++) {
                    System.out.print(row + ": ");
                    for (int i = 0; i < columns; i++) {
                        if (i > 0) {
                            System.out.print(", ");
                        }
                        System.out.print(rs.getObject(i + 1));
                    }
                    System.out.println();
                }
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            close(rs, stmt);
            if (closeConn)
                close(connection);
        }
        System.out.println();
    }

    public static void close(Connection conn) throws SQLException {
        close(null, null, conn);
    }

    public static void close(Statement stmt) throws SQLException {
        close(null, stmt, null);
    }

    public static void close(ResultSet rs) throws SQLException {
        close(rs, null, null);
    }

    public static void close(Statement stmt, Connection conn) throws SQLException {
        close(null, stmt, conn);
    }

    public static void close(ResultSet rs, Statement stmt) throws SQLException {
        close(rs, stmt, null);
    }

    public static void close(ResultSet rs, Statement stmt, Connection conn) throws SQLException {

        if (null != rs) {
            rs.close();
            rs = null;
        }

        if (null != stmt) {
            stmt.close();
            stmt = null;
        }

        if (null != conn) {
            conn.close();
            conn = null;
        }
    }
}

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