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helper classes for excel processing, tests (#1093) 

* helper classes for excel processing, tests

* fix imports

* list declaration
This commit is contained in:
lor6 2017-02-05 03:03:00 +02:00 committed by KevinGilmore
parent c77801e77f
commit 10eb6bfcc0
5 changed files with 353 additions and 0 deletions
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16
apache-poi/pom.xml
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@ -9,6 +9,7 @@
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
<junit.version>4.12</junit.version>
<poi.version>3.15</poi.version>
<jexcel.version>1.0.6</jexcel.version>
</properties>
<build>
@ -37,5 +38,20 @@
<artifactId>poi-ooxml</artifactId>
<version>${poi.version}</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>${poi.version}</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>${poi.version}</version>
</dependency>
<dependency>
<groupId>org.jxls</groupId>
<artifactId>jxls-jexcel</artifactId>
<version>${jexcel.version}</version>
</dependency>
</dependencies>
</project>

79
apache-poi/src/main/java/com/baeldung/jexcel/JExcelHelper.java Normal file
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@ -0,0 +1,79 @@
package com.baeldung.jexcel;
import jxl.*;
import java.util.Map;
import java.util.HashMap;
import java.util.ArrayList;
import java.util.List;
import jxl.read.biff.BiffException;
import java.io.File;
import java.io.IOException;
import jxl.write.*;
import jxl.write.Number;
import jxl.format.Colour;
public class JExcelHelper {
public Map<Integer, List<String>> readJExcel(String fileLocation) throws IOException, BiffException {
Map<Integer, List<String>> data = new HashMap<>();
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();
}
}
}
}

137
apache-poi/src/main/java/com/baeldung/poi/excel/ExcelPOIHelper.java Normal file
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@ -0,0 +1,137 @@
package com.baeldung.poi.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 java.util.List;
public class ExcelPOIHelper {
public Map<Integer, List<String>> readExcel(String fileLocation) throws IOException {
Map<Integer, List<String>> data = new HashMap<>();
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((int)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) {
workbook.close();
}
}
}
}

62
apache-poi/src/test/java/com/baeldung/jexcel/JExcelTest.java Normal file
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@ -0,0 +1,62 @@
package com.baeldung.jexcel;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import jxl.read.biff.BiffException;
import java.util.Map;
import java.util.ArrayList;
import java.util.List;
import com.baeldung.jexcel.JExcelHelper;
import jxl.write.WriteException;
import jxl.read.biff.BiffException;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import org.junit.Before;
public class JExcelTest {
private JExcelHelper jExcelHelper;
private static String FILE_NAME = "temp.xls";
private String fileLocation;
@Before
public void generateExcelFile() throws IOException, WriteException {
File currDir = new File(".");
String path = currDir.getAbsolutePath();
fileLocation = path.substring(0, path.length() - 1) + FILE_NAME;
jExcelHelper = new JExcelHelper();
jExcelHelper.writeJExcel();
}
@Test
public void whenParsingJExcelFile_thenCorrect() throws IOException, BiffException {
Map<Integer, List<String>> data = jExcelHelper.readJExcel(fileLocation);
assertEquals("Name", data.get(0)
.get(0));
assertEquals("Age", data.get(0)
.get(1));
assertEquals("John Smith", data.get(2)
.get(0));
assertEquals("20", data.get(2)
.get(1));
assertEquals("Ana Johnson", data.get(3)
.get(0));
assertEquals("30", data.get(3)
.get(1));
}
}

59
apache-poi/src/test/java/com/baeldung/poi/excel/ExcelTest.java Normal file
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@ -0,0 +1,59 @@
package com.baeldung.poi.excel;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import jxl.read.biff.BiffException;
import java.util.Map;
import java.util.ArrayList;
import java.util.List;
import com.baeldung.poi.excel.ExcelPOIHelper;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import org.junit.Before;
public class ExcelTest {
private ExcelPOIHelper excelPOIHelper;
private static String FILE_NAME = "temp.xlsx";
private String fileLocation;
@Before
public void generateExcelFile() throws IOException {
File currDir = new File(".");
String path = currDir.getAbsolutePath();
fileLocation = path.substring(0, path.length() - 1) + FILE_NAME;
excelPOIHelper = new ExcelPOIHelper();
excelPOIHelper.writeExcel();
}
@Test
public void whenParsingPOIExcelFile_thenCorrect() throws IOException {
Map<Integer, List<String>> data = excelPOIHelper.readExcel(fileLocation);
assertEquals("Name", data.get(0)
.get(0));
assertEquals("Age", data.get(0)
.get(1));
assertEquals("John Smith", data.get(1)
.get(0));
assertEquals("20", data.get(1)
.get(1));
assertEquals("Ana Johnson", data.get(2)
.get(0));
assertEquals("30", data.get(2)
.get(1));
}
}