Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

public class Main {
    public static void main(String[] args) throws Exception {
        try {
            Connection conn = getHSQLConnection();

            conn.setAutoCommit(false);
            Statement st = conn.createStatement();
            st.executeUpdate("create table survey (id int,name varchar(30));");
            st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
            st = conn.createStatement();
            ResultSet rs = st.executeQuery("SELECT * FROM survey");

            outputResultSet(rs);

            rs.close();
            st.close();
            conn.close();
        } catch (SQLException sqle) {
            String sqlMessage = sqle.getMessage();
            String sqlState = sqle.getSQLState();
            int vendorCode = sqle.getErrorCode();
            System.err.println("Exception occurred:");
            System.err.println("Message: " + sqlMessage);
            System.err.println("SQL state: " + sqlState);
            System.err.println("Vendor code: " + vendorCode + "\n----------------");
        }
    }

    private static void outputResultSet(ResultSet rs) throws Exception {
        ResultSetMetaData rsMetaData = rs.getMetaData();
        int numberOfColumns = rsMetaData.getColumnCount();
        for (int i = 1; i < numberOfColumns + 1; i++) {
            String columnName = rsMetaData.getColumnName(i);
            System.out.print(columnName + "   ");

        }
        System.out.println();
        System.out.println("----------------------");

        while (rs.next()) {
            for (int i = 1; i < numberOfColumns + 1; i++) {
                System.out.print(rs.getString(i) + "   ");
            }
            System.out.println();
        }

    }

    private static Connection getHSQLConnection() throws Exception {
        Class.forName("org.hsqldb.jdbcDriver");
        String url = "jdbc:hsqldb:mem:data/tutorial";

        return DriverManager.getConnection(url, "sa", "");
    }
}