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excel processing using jexcel and poi (#1058)

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* excel processing using jexcel and poi

* update examples

* small fix

* fix poi version, fix imports
This commit is contained in:
lor6
2017-02-03 04:46:39 +02:00
committed by KevinGilmore
parent a1312e9ce0
commit a44ea9588f
6 changed files with 419 additions and 0 deletions
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140
spring-mvc-java/src/main/java/com/baeldung/excel/ExcelPOIHelper.java Normal file
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package com.baeldung.excel;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.IndexedColors;
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.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.FillPatternType;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.HashMap;
import java.util.ArrayList;
import org.springframework.stereotype.Service;
@Service
public class ExcelPOIHelper {
public Map<Integer, ArrayList<String>> readExcel(String fileLocation) throws IOException {
Map<Integer, ArrayList<String>> data = new HashMap<Integer, ArrayList<String>>();
FileInputStream file = new FileInputStream(new File(fileLocation));
Workbook workbook = new XSSFWorkbook(file);
Sheet sheet = workbook.getSheetAt(0);
int i = 0;
for (Row row : sheet) {
data.put(i, new ArrayList<String>());
for (Cell cell : row) {
switch (cell.getCellTypeEnum()) {
case STRING:
data.get(i)
.add(cell.getRichStringCellValue()
.getString());
break;
case NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
data.get(i)
.add(cell.getDateCellValue() + "");
} else {
data.get(i)
.add(cell.getNumericCellValue() + "");
}
break;
case BOOLEAN:
data.get(i)
.add(cell.getBooleanCellValue() + "");
break;
case FORMULA:
data.get(i)
.add(cell.getCellFormula() + "");
break;
default:
data.get(i)
.add(" ");
}
}
i++;
}
if (workbook != null){
workbook.close();
}
return data;
}
public void writeExcel() throws IOException {
Workbook workbook = new XSSFWorkbook();
try {
Sheet sheet = workbook.createSheet("Persons");
sheet.setColumnWidth(0, 6000);
sheet.setColumnWidth(1, 4000);
Row header = sheet.createRow(0);
CellStyle headerStyle = workbook.createCellStyle();
headerStyle.setFillForegroundColor(IndexedColors.LIGHT_BLUE.getIndex());
headerStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
XSSFFont font = ((XSSFWorkbook) workbook).createFont();
font.setFontName("Arial");
font.setFontHeightInPoints((short) 16);
font.setBold(true);
headerStyle.setFont(font);
Cell headerCell = header.createCell(0);
headerCell.setCellValue("Name");
headerCell.setCellStyle(headerStyle);
headerCell = header.createCell(1);
headerCell.setCellValue("Age");
headerCell.setCellStyle(headerStyle);
CellStyle style = workbook.createCellStyle();
style.setWrapText(true);
Row row = sheet.createRow(2);
Cell cell = row.createCell(0);
cell.setCellValue("John Smith");
cell.setCellStyle(style);
cell = row.createCell(1);
cell.setCellValue(20);
cell.setCellStyle(style);
row = sheet.createRow(3);
cell = row.createCell(0);
cell.setCellValue("Ana Johnson");
cell.setCellStyle(style);
cell = row.createCell(1);
cell.setCellValue(30);
cell.setCellStyle(style);
File currDir = new File(".");
String path = currDir.getAbsolutePath();
String fileLocation = path.substring(0, path.length() - 1) + "temp.xlsx";
FileOutputStream outputStream = new FileOutputStream(fileLocation);
workbook.write(outputStream);
} finally {
if (workbook != null) {
try {
workbook.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}

80
spring-mvc-java/src/main/java/com/baeldung/excel/JExcelHelper.java Normal file
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package com.baeldung.excel;
import jxl.*;
import java.util.Map;
import java.util.HashMap;
import java.util.ArrayList;
import jxl.read.biff.BiffException;
import java.io.File;
import java.io.IOException;
import org.springframework.stereotype.Service;
import jxl.write.*;
import jxl.write.Number;
import jxl.format.Colour;
@Service
public class JExcelHelper {
public Map<Integer, ArrayList<String>> readJExcel(String fileLocation) throws IOException, BiffException {
Map<Integer, ArrayList<String>> data = new HashMap<Integer, ArrayList<String>>();
Workbook workbook = Workbook.getWorkbook(new File(fileLocation));
Sheet sheet = workbook.getSheet(0);
int rows = sheet.getRows();
int columns = sheet.getColumns();
for (int i = 0; i < rows; i++) {
data.put(i, new ArrayList<String>());
for (int j = 0; j < columns; j++) {
data.get(i).add(sheet.getCell(j, i).getContents());
}
}
return data;
}
public void writeJExcel() throws IOException, WriteException {
WritableWorkbook workbook = null;
try {
File currDir = new File(".");
String path = currDir.getAbsolutePath();
String fileLocation = path.substring(0, path.length() - 1) + "temp.xls";
workbook = Workbook.createWorkbook(new File(fileLocation));
WritableSheet sheet = workbook.createSheet("Sheet 1", 0);
WritableCellFormat headerFormat = new WritableCellFormat();
WritableFont font = new WritableFont(WritableFont.ARIAL, 16, WritableFont.BOLD);
headerFormat.setFont(font);
headerFormat.setBackground(Colour.LIGHT_BLUE);
headerFormat.setWrap(true);
Label headerLabel = new Label(0, 0, "Name", headerFormat);
sheet.setColumnView(0, 60);
sheet.addCell(headerLabel);
headerLabel = new Label(1, 0, "Age", headerFormat);
sheet.setColumnView(0, 40);
sheet.addCell(headerLabel);
WritableCellFormat cellFormat = new WritableCellFormat();
cellFormat.setWrap(true);
Label cellLabel = new Label(0, 2, "John Smith", cellFormat);
sheet.addCell(cellLabel);
Number cellNumber = new Number(1, 2, 20, cellFormat);
sheet.addCell(cellNumber);
cellLabel = new Label(0, 3, "Ana Johnson", cellFormat);
sheet.addCell(cellLabel);
cellNumber = new Number(1, 3, 30, cellFormat);
sheet.addCell(cellNumber);
workbook.write();
} finally {
if (workbook != null) {
workbook.close();
}
}
}
}

12
spring-mvc-java/src/main/java/com/baeldung/spring/web/config/WebConfig.java
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@@ -21,6 +21,7 @@ import org.springframework.web.servlet.view.JstlView;
import org.springframework.web.servlet.view.ResourceBundleViewResolver;
import org.springframework.web.servlet.view.XmlViewResolver;
import org.springframework.web.util.UrlPathHelper;
import com.baeldung.excel.*;
@Configuration
@EnableWebMvc
@@ -106,4 +107,15 @@ public class WebConfig extends WebMvcConfigurerAdapter {
configurer.setUrlPathHelper(urlPathHelper);
}
@Bean
public JExcelHelper jExcelHelper() {
return new JExcelHelper();
}
@Bean
public ExcelPOIHelper excelPOIHelper() {
return new ExcelPOIHelper();
}
}

105
spring-mvc-java/src/main/java/com/baeldung/web/controller/ExcelController.java Normal file
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package com.baeldung.web.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import com.baeldung.excel.*;
import jxl.read.biff.BiffException;
import java.util.Map;
import java.util.ArrayList;
import javax.annotation.Resource;
import jxl.write.WriteException;
@Controller
public class ExcelController {
private String fileLocation;
@Resource(name = "jExcelHelper")
private JExcelHelper jExcelHelper;
@Resource(name = "excelPOIHelper")
private ExcelPOIHelper excelPOIHelper;
@RequestMapping(method = RequestMethod.GET, value = "/excelProcessing")
public String getExcelProcessingPage() {
return "excel";
}
@RequestMapping(method = RequestMethod.POST, value = "/uploadExcelFile")
public String uploadFile(Model model, MultipartFile file) throws IOException {
InputStream in = file.getInputStream();
File currDir = new File(".");
String path = currDir.getAbsolutePath();
fileLocation = path.substring(0, path.length() - 1) + file.getOriginalFilename();
FileOutputStream f = new FileOutputStream(fileLocation);
int ch = 0;
while ((ch = in.read()) != -1) {
f.write(ch);
}
f.flush();
f.close();
System.out.println(fileLocation);
model.addAttribute("message", "File: " + file.getOriginalFilename() + " has been uploaded successfully!");
return "excel";
}
@RequestMapping(method = RequestMethod.GET, value = "/readJExcel")
public String readJExcel(Model model) throws IOException, BiffException {
if (fileLocation != null) {
if (fileLocation.endsWith(".xls")) {
Map<Integer, ArrayList<String>> data = jExcelHelper.readJExcel(fileLocation);
model.addAttribute("data", data);
} else {
model.addAttribute("message", "Not a valid .xls file!");
}
} else {
model.addAttribute("message", "File missing! Please upload an excel file.");
}
return "excel";
}
@RequestMapping(method = RequestMethod.GET, value = "/readPOI")
public String readPOI(Model model) throws IOException {
if (fileLocation != null) {
if (fileLocation.endsWith(".xlsx")) {
Map<Integer, ArrayList<String>> data = excelPOIHelper.readExcel(fileLocation);
model.addAttribute("data", data);
} else {
model.addAttribute("message", "Not a valid .xlsx file!");
}
} else {
model.addAttribute("message", "File missing! Please upload an excel file.");
}
return "excel";
}
@RequestMapping(method = RequestMethod.POST, value = "/writeJExcel")
public String writeJExcel(Model model) throws IOException, BiffException, WriteException {
jExcelHelper.writeJExcel();
model.addAttribute("message", "Write successful!");
return "excel";
}
@RequestMapping(method = RequestMethod.POST, value = "/writePOI")
public String writePOI(Model model) throws IOException {
excelPOIHelper.writeExcel();
model.addAttribute("message", "Write successful!");
return "excel";
}
}