org.apache.poi.examples.ss.LoanCalculator Maven / Gradle / Ivy
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package org.apache.poi.examples.ss;
import java.io.FileOutputStream;
import java.util.HashMap;
import java.util.Map;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.FillPatternType;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Name;
import org.apache.poi.ss.usermodel.PrintSetup;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
/**
* Simple Loan Calculator. Demonstrates advance usage of cell formulas and named ranges.
*
* Usage:
* LoanCalculator -xls|xlsx
*/
@SuppressWarnings({"java:S106","java:S4823","java:S1192"})
public final class LoanCalculator {
private LoanCalculator() {}
public static void main(String[] args) throws Exception {
Workbook wb;
if(args.length > 0 && args[0].equals("-xls")) wb = new HSSFWorkbook();
else wb = new XSSFWorkbook();
Map styles = createStyles(wb);
Sheet sheet = wb.createSheet("Loan Calculator");
sheet.setPrintGridlines(false);
sheet.setDisplayGridlines(false);
PrintSetup printSetup = sheet.getPrintSetup();
printSetup.setLandscape(true);
sheet.setFitToPage(true);
sheet.setHorizontallyCenter(true);
sheet.setColumnWidth(0, 3*256);
sheet.setColumnWidth(1, 3*256);
sheet.setColumnWidth(2, 11*256);
sheet.setColumnWidth(3, 14*256);
sheet.setColumnWidth(4, 14*256);
sheet.setColumnWidth(5, 14*256);
sheet.setColumnWidth(6, 14*256);
createNames(wb);
Row titleRow = sheet.createRow(0);
titleRow.setHeightInPoints(35);
for (int i = 1; i <= 7; i++) {
titleRow.createCell(i).setCellStyle(styles.get("title"));
}
Cell titleCell = titleRow.getCell(2);
titleCell.setCellValue("Simple Loan Calculator");
sheet.addMergedRegion(CellRangeAddress.valueOf("$C$1:$H$1"));
Row row = sheet.createRow(2);
Cell cell = row.createCell(4);
cell.setCellValue("Enter values");
cell.setCellStyle(styles.get("item_right"));
row = sheet.createRow(3);
cell = row.createCell(2);
cell.setCellValue("Loan amount");
cell.setCellStyle(styles.get("item_left"));
cell = row.createCell(4);
cell.setCellStyle(styles.get("input_$"));
cell.setAsActiveCell();
row = sheet.createRow(4);
cell = row.createCell(2);
cell.setCellValue("Annual interest rate");
cell.setCellStyle(styles.get("item_left"));
cell = row.createCell(4);
cell.setCellStyle(styles.get("input_%"));
row = sheet.createRow(5);
cell = row.createCell(2);
cell.setCellValue("Loan period in years");
cell.setCellStyle(styles.get("item_left"));
cell = row.createCell(4);
cell.setCellStyle(styles.get("input_i"));
row = sheet.createRow(6);
cell = row.createCell(2);
cell.setCellValue("Start date of loan");
cell.setCellStyle(styles.get("item_left"));
cell = row.createCell(4);
cell.setCellStyle(styles.get("input_d"));
row = sheet.createRow(8);
cell = row.createCell(2);
cell.setCellValue("Monthly payment");
cell.setCellStyle(styles.get("item_left"));
cell = row.createCell(4);
cell.setCellFormula("IF(Values_Entered,Monthly_Payment,\"\")");
cell.setCellStyle(styles.get("formula_$"));
row = sheet.createRow(9);
cell = row.createCell(2);
cell.setCellValue("Number of payments");
cell.setCellStyle(styles.get("item_left"));
cell = row.createCell(4);
cell.setCellFormula("IF(Values_Entered,Loan_Years*12,\"\")");
cell.setCellStyle(styles.get("formula_i"));
row = sheet.createRow(10);
cell = row.createCell(2);
cell.setCellValue("Total interest");
cell.setCellStyle(styles.get("item_left"));
cell = row.createCell(4);
cell.setCellFormula("IF(Values_Entered,Total_Cost-Loan_Amount,\"\")");
cell.setCellStyle(styles.get("formula_$"));
row = sheet.createRow(11);
cell = row.createCell(2);
cell.setCellValue("Total cost of loan");
cell.setCellStyle(styles.get("item_left"));
cell = row.createCell(4);
cell.setCellFormula("IF(Values_Entered,Monthly_Payment*Number_of_Payments,\"\")");
cell.setCellStyle(styles.get("formula_$"));
// Write the output to a file
String file = "loan-calculator.xls";
if(wb instanceof XSSFWorkbook) file += "x";
FileOutputStream out = new FileOutputStream(file);
wb.write(out);
out.close();
}
/**
* cell styles used for formatting calendar sheets
*/
private static Map createStyles(Workbook wb){
Map styles = new HashMap<>();
CellStyle style;
Font titleFont = wb.createFont();
titleFont.setFontHeightInPoints((short)14);
titleFont.setFontName("Trebuchet MS");
style = wb.createCellStyle();
style.setFont(titleFont);
style.setBorderBottom(BorderStyle.DOTTED);
style.setBottomBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
styles.put("title", style);
Font itemFont = wb.createFont();
itemFont.setFontHeightInPoints((short)9);
itemFont.setFontName("Trebuchet MS");
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.LEFT);
style.setFont(itemFont);
styles.put("item_left", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.RIGHT);
style.setFont(itemFont);
styles.put("item_right", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.RIGHT);
style.setFont(itemFont);
style.setBorderRight(BorderStyle.DOTTED);
style.setRightBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderBottom(BorderStyle.DOTTED);
style.setBottomBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderLeft(BorderStyle.DOTTED);
style.setLeftBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderTop(BorderStyle.DOTTED);
style.setTopBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setDataFormat(wb.createDataFormat().getFormat("_($* #,##0.00_);_($* (#,##0.00);_($* \"-\"??_);_(@_)"));
styles.put("input_$", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.RIGHT);
style.setFont(itemFont);
style.setBorderRight(BorderStyle.DOTTED);
style.setRightBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderBottom(BorderStyle.DOTTED);
style.setBottomBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderLeft(BorderStyle.DOTTED);
style.setLeftBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderTop(BorderStyle.DOTTED);
style.setTopBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setDataFormat(wb.createDataFormat().getFormat("0.000%"));
styles.put("input_%", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.RIGHT);
style.setFont(itemFont);
style.setBorderRight(BorderStyle.DOTTED);
style.setRightBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderBottom(BorderStyle.DOTTED);
style.setBottomBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderLeft(BorderStyle.DOTTED);
style.setLeftBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderTop(BorderStyle.DOTTED);
style.setTopBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setDataFormat(wb.createDataFormat().getFormat("0"));
styles.put("input_i", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER);
style.setFont(itemFont);
style.setDataFormat(wb.createDataFormat().getFormat("m/d/yy"));
styles.put("input_d", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.RIGHT);
style.setFont(itemFont);
style.setBorderRight(BorderStyle.DOTTED);
style.setRightBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderBottom(BorderStyle.DOTTED);
style.setBottomBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderLeft(BorderStyle.DOTTED);
style.setLeftBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderTop(BorderStyle.DOTTED);
style.setTopBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setDataFormat(wb.createDataFormat().getFormat("$##,##0.00"));
style.setBorderBottom(BorderStyle.DOTTED);
style.setBottomBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
styles.put("formula_$", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.RIGHT);
style.setFont(itemFont);
style.setBorderRight(BorderStyle.DOTTED);
style.setRightBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderBottom(BorderStyle.DOTTED);
style.setBottomBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderLeft(BorderStyle.DOTTED);
style.setLeftBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setBorderTop(BorderStyle.DOTTED);
style.setTopBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setDataFormat(wb.createDataFormat().getFormat("0"));
style.setBorderBottom(BorderStyle.DOTTED);
style.setBottomBorderColor(IndexedColors.GREY_40_PERCENT.getIndex());
style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
styles.put("formula_i", style);
return styles;
}
//define named ranges for the inputs and formulas
public static void createNames(Workbook wb){
Name name;
name = wb.createName();
name.setNameName("Interest_Rate");
name.setRefersToFormula("'Loan Calculator'!$E$5");
name = wb.createName();
name.setNameName("Loan_Amount");
name.setRefersToFormula("'Loan Calculator'!$E$4");
name = wb.createName();
name.setNameName("Loan_Start");
name.setRefersToFormula("'Loan Calculator'!$E$7");
name = wb.createName();
name.setNameName("Loan_Years");
name.setRefersToFormula("'Loan Calculator'!$E$6");
name = wb.createName();
name.setNameName("Number_of_Payments");
name.setRefersToFormula("'Loan Calculator'!$E$10");
name = wb.createName();
name.setNameName("Monthly_Payment");
name.setRefersToFormula("-PMT(Interest_Rate/12,Number_of_Payments,Loan_Amount)");
name = wb.createName();
name.setNameName("Total_Cost");
name.setRefersToFormula("'Loan Calculator'!$E$12");
name = wb.createName();
name.setNameName("Total_Interest");
name.setRefersToFormula("'Loan Calculator'!$E$11");
name = wb.createName();
name.setNameName("Values_Entered");
name.setRefersToFormula("IF(Loan_Amount*Interest_Rate*Loan_Years*Loan_Start>0,1,0)");
}
}