EasyXLS

How to export ResultSet to Excel in custom format in Java

EasyXLS Excel library can be used to export Excel files in Java. The library works with any Java SE application and without MS Excel installed.

Step 1: Download and install EasyXLS Excel Library for Java

To download the trial version of EasyXLS Excel Library, press the below button:

Download EasyXLS™ Excel Library for Java

If you already own a license key, you may login and download EasyXLS from your account.

Step 2: Create a Java project

If don't have a project already, create a new Java project.

Step 3: Include EasyXLS library into project

EasyXLS.jar must be added to external libraries into your project for Eclipse or to your application CLASSPATH. EasyXLS.jar can be found after installing EasyXLS, in "Lib" folder.

Add EasyXLS library to CLASSPATH

Step 4: Run Java code that exports ResultSet to Excel with formatting

Execute the following Java code that exports ResultSet to Excel with formatting.

package testexceljava;

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

/* ---------------------------------------------------------------------
 | Tutorial 02
 |
 | 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 an user-defined format.
 * ------------------------------------------------------------------ */

public class Tutorial02 {

    public static void main(String[] args) {
        try {
            System.out.println("Tutorial 02");
            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, " + 
                    "CAST(O.Quantity AS varchar) AS 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();

            // Create an instance of the class used to format the cells in the report
            ExcelAutoFormat xlsAutoFormat = new ExcelAutoFormat();
            
            // Set the formatting style of the header
            ExcelStyle xlsHeaderStyle = new ExcelStyle(new Color(144, 238, 144));
            xlsHeaderStyle.setFontSize(12);
            xlsAutoFormat.setHeaderRowStyle(xlsHeaderStyle);

            // Set the formatting style of the cells (alternating style)
            ExcelStyle xlsEvenRowStripesStyle = new ExcelStyle(new Color(255, 250, 240));
            xlsEvenRowStripesStyle.setFormat("$0.00");
            xlsEvenRowStripesStyle.setHorizontalAlignment(Alignment.ALIGNMENT_LEFT);
            xlsAutoFormat.setEvenRowStripesStyle(xlsEvenRowStripesStyle);
            ExcelStyle xlsOddRowStripesStyle = new ExcelStyle(new Color(240, 247, 239));
            xlsOddRowStripesStyle.setFormat("$0.00");
            xlsOddRowStripesStyle.setHorizontalAlignment (Alignment.ALIGNMENT_LEFT);
            xlsAutoFormat.setOddRowStripesStyle(xlsOddRowStripesStyle);
            ExcelStyle xlsLeftColumnStyle = new ExcelStyle(new Color(255, 250, 240));
            xlsLeftColumnStyle.setFormat("mm/dd/yyyy");
            xlsLeftColumnStyle.setHorizontalAlignment(Alignment.ALIGNMENT_LEFT);
            xlsAutoFormat.setLeftColumnStyle(xlsLeftColumnStyle);
      
            // Export the Excel file
            System.out.println(
                "Writing file C:\\Samples\\Tutorial02 - export ResultSet to Excel with formatting.xlsx.");
            workbook.easy_WriteXLSXFile_FromResultSet(
                "c:\\Samples\\Tutorial02 - export ResultSet to Excel with formatting.xlsx", 
                rs, xlsAutoFormat, "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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