EasyXLS

How to export ResultSet to Excel in Java

package testexceljava;

import java.sql.ResultSet;
import java.sql.*;
import EasyXLS.*;
import EasyXLS.Constants.*;

/* ---------------------------------------------------------------------
 | Tutorial 01
 |
 | This code sample shows how to export ResultSet to Excel file in Java.
 | The ResultSet contains data from a SQL database.
 | The cells are formatted using a predefined format (1).
 * --------------------------------------------------------------------- */

public class Tutorial01 {

    public static void main(String[] args) {
        try {
            System.out.println("Tutorial 01");
            System.out.println("----------");

            // Create an instance of the class that exports Excel files
            ExcelDocument workbook = new ExcelDocument();

            // Create the database connection
            Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");  
            String sConnectionString = "jdbc:microsoft:sqlserver://localhost:1433;" +
                                       "databasename=Northwind;user=sa;password=";
            Connection sqlConnection = (Connection) DriverManager.getConnection(sConnectionString);

            // Create the statement used to populate the resultset and populate the resultset
            String sQueryString = "SELECT TOP 100 CAST(Month(ord.OrderDate) AS varchar) + '/' + " + 
                    "CAST(Day(ord.OrderDate) AS varchar) + '/' + " + 
                    "CAST(year(ord.OrderDate) AS varchar) AS 'Order Date', " + 
                    "P.ProductName AS 'Product Name', O.UnitPrice AS Price, O.Quantity, " + 
                    "O.UnitPrice * O.Quantity AS Value " +
                    "FROM Orders AS ord, [Order Details] AS O, Products AS P " + 
                    "WHERE O.ProductID = P.ProductID AND O.OrderID = ord.OrderID";
            PreparedStatement pStatement = sqlConnection.prepareStatement(sQueryString, 
                    java.sql.ResultSet.TYPE_SCROLL_INSENSITIVE, java.sql.ResultSet.CONCUR_UPDATABLE);
            ResultSet rs = pStatement.executeQuery();

            // Export the Excel file (1) 
            System.out.println("Writing file C:\\Samples\\Tutorial01 - export ResultSet to Excel.xlsx.");
            workbook.easy_WriteXLSXFile_FromResultSet("C:\\Samples\\Tutorial01 - export ResultSet to Excel.xlsx", rs, 
                    new ExcelAutoFormat(Styles.AUTOFORMAT_EASYXLS1), "Sheet1");

            // Confirm export of Excel file
            if (workbook.easy_getError().equals(""))
                System.out.println("File successfully created.");
            else
                System.out.println("Error encountered: " + workbook.easy_getError());

            // Close the database connection
            sqlConnection.close();

            // Dispose memory
            workbook.Dispose();
        }
        catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

EasyXLS Excel libraries:

Java
Excel Library for Java
full Java version to import, export or convert Excel files
Excel Writer for Java
Java version to create and export Excel files
Express Excel Writer for Java
limited Java version to create and export Excel files in predefined formats
Download EasyXLS™ Excel Library for Java

File formats:

MS Excel 97 - 2003
MS Excel 2007 - 2010
MS Excel 2013
MS Excel 2016
MS Excel 2019
XLSXXLSMXLSBXLS
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