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BAEL-6921, How To Convert Excel Data Into List Of Java Objects (#14813) 

* BAEL-6921, How To Convert Excel Data into List of Java Objects

* BAEL-6921, How To Convert Excel Data into List of Java Objects
This commit is contained in:
Nadia 2023-09-23 17:08:15 +01:00 committed by GitHub
parent 8ea2cc9703
commit 1a9337f238
9 changed files with 302 additions and 0 deletions
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64
apache-poi-3/pom.xml
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<artifactId>poi-scratchpad</artifactId>
<version>${poi.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.github.ozlerhakan/poiji -->
<dependency>
<groupId>com.github.ozlerhakan</groupId>
<artifactId>poiji</artifactId>
<version>${poiji.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi/5.2.3 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>${poi.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml-schemas/4.1.2 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>4.1.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.xmlbeans/xmlbeans/5.1.1 -->
<dependency>
<groupId>org.apache.xmlbeans</groupId>
<artifactId>xmlbeans</artifactId>
<version>5.1.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-collections4 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>4.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.dhatim/fastexcel/0.15.7 -->
<dependency>
<groupId>org.dhatim</groupId>
<artifactId>fastexcel</artifactId>
<version>${fastexcel.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.dhatim/fastexcel-reader/0.15.7 -->
<dependency>
<groupId>org.dhatim</groupId>
<artifactId>fastexcel-reader</artifactId>
<version>${fastexcel.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/net.sourceforge.jexcelapi/jxl/2.6.12 -->
<dependency>
<groupId>net.sourceforge.jexcelapi</groupId>
<artifactId>jxl</artifactId>
<version>${jxl.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-api -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.17.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.17.1</version>
</dependency>
</dependencies>
<properties>
<poi.version>5.2.3</poi.version>
<poiji.version>4.1.1</poiji.version>
<fastexcel.version>0.15.7</fastexcel.version>
<jxl.version>2.6.12</jxl.version>
</properties>
</project>

54
apache-poi-3/src/main/java/com/baeldung/convert/exceldatatolist/FoodInfo.java Normal file
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package com.baeldung.convert.exceldatatolist;
import com.poiji.annotation.ExcelCellName;
public class FoodInfo {
@ExcelCellName("Category")
private String category; //food category
@ExcelCellName("Name")
private String name; // food name
@ExcelCellName("Measure")
private String measure;
@ExcelCellName("Calories")
private double calories; //amount of calories in kcal/measure
@Override
public String toString() {
return "FoodInfo{" + "category='" + category + '\'' + ", name='" + name + '\'' + ", measure='" + measure + '\'' + ", calories=" + calories + "} \n";
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getMeasure() {
return measure;
}
public void setMeasure(String measure) {
this.measure = measure;
}
public double getCalories() {
return calories;
}
public void setCalories(double calories) {
this.calories = calories;
}
}

42
apache-poi-3/src/main/java/com/baeldung/convert/exceldatatolist/fastexcel/ExcelDataToListOfObjectsFastExcel.java Normal file
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package com.baeldung.convert.exceldatatolist.fastexcel;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.stream.Stream;
import org.dhatim.fastexcel.reader.ReadableWorkbook;
import org.dhatim.fastexcel.reader.Row;
import org.dhatim.fastexcel.reader.Sheet;
import com.baeldung.convert.exceldatatolist.FoodInfo;
public class ExcelDataToListOfObjectsFastExcel {
public static List<FoodInfo> excelDataToListOfObjets_withFastExcel(String fileLocation)throws IOException, NumberFormatException {
List<FoodInfo> foodData = new ArrayList<FoodInfo>();
try (FileInputStream file = new FileInputStream(fileLocation);
ReadableWorkbook wb = new ReadableWorkbook(file)) {
Sheet sheet = wb.getFirstSheet();
for (Row row:
sheet.read()
) {
if(row.getRowNum() == 1) {
continue;
}
FoodInfo food = new FoodInfo();
food.setCategory(row.getCellText(0));
food.setName(row.getCellText(1));
food.setMeasure(row.getCellText(2));
food.setCalories(Double.parseDouble(row.getCellText(3)));
foodData.add(food);
}
}
return foodData;
}
}

37
apache-poi-3/src/main/java/com/baeldung/convert/exceldatatolist/jexcelapi/ExcelDataToListOfObjectsJxl.java Normal file
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package com.baeldung.convert.exceldatatolist.jexcelapi;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import com.baeldung.convert.exceldatatolist.FoodInfo;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;
public class ExcelDataToListOfObjectsJxl {
public static List<FoodInfo> excelDataToListOfObjets_withJxl(String fileLocation) throws IOException, BiffException {
List<FoodInfo> foodData = new ArrayList<FoodInfo>();
Workbook workbook = Workbook.getWorkbook(new File(fileLocation));
Sheet sheet = workbook.getSheet(0);
int rows = sheet.getRows();
for (int i = 1; i < rows; i++) {
FoodInfo foodInfo = new FoodInfo();
foodInfo.setCategory(sheet.getCell(0, i).getContents());
foodInfo.setName(sheet.getCell(1, i).getContents());
foodInfo.setMeasure(sheet.getCell(2, i).getContents());
foodInfo.setCalories(Double.parseDouble(sheet.getCell(3, i).getContents()));
foodData.add(foodInfo);
}
return foodData;
}
}

39
apache-poi-3/src/main/java/com/baeldung/convert/exceldatatolist/poi/ExcelDataToListApachePOI.java Normal file
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package com.baeldung.convert.exceldatatolist.poi;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.ss.usermodel.DataFormatter;
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 com.baeldung.convert.exceldatatolist.FoodInfo;
public class ExcelDataToListApachePOI {
public static List<FoodInfo> excelDataToListOfObjets_withApachePOI(String fileLocation) throws IOException {
FileInputStream file = new FileInputStream(new File(fileLocation));
Workbook workbook = new XSSFWorkbook(file);
Sheet sheet = workbook.getSheetAt(0);
List<FoodInfo> foodData = new ArrayList<FoodInfo>();
DataFormatter dataFormatter = new DataFormatter();
for (int n = 1; n < sheet.getPhysicalNumberOfRows(); n++) {
Row row = sheet.getRow(n);
FoodInfo foodInfo = new FoodInfo();
int i = row.getFirstCellNum();
foodInfo.setCategory(dataFormatter.formatCellValue(row.getCell(i)));
foodInfo.setName(dataFormatter.formatCellValue(row.getCell(++i)));
foodInfo.setMeasure(dataFormatter.formatCellValue(row.getCell(++i)));
foodInfo.setCalories(Double.parseDouble(dataFormatter.formatCellValue(row.getCell(++i))));
foodData.add(foodInfo);
}
return foodData;
}
}

13
apache-poi-3/src/main/java/com/baeldung/convert/exceldatatolist/poiji/ExcelDataToListOfObjectsPOIJI.java Normal file
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@ -0,0 +1,13 @@
package com.baeldung.convert.exceldatatolist.poiji;
import java.io.File;
import java.util.List;
import com.baeldung.convert.exceldatatolist.FoodInfo;
import com.poiji.bind.Poiji;
public class ExcelDataToListOfObjectsPOIJI {
public static List<FoodInfo> excelDataToListOfObjets_withPOIJI(String fileLocation){
return Poiji.fromExcel(new File(fileLocation), FoodInfo.class);
}
}

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apache-poi-3/src/main/resources/food_info.xls Normal file
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apache-poi-3/src/main/resources/food_info.xlsx Normal file
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53
apache-poi-3/src/test/java/com/baeldung/convert/exceldatatolist/ExcelDataToListOfObjectsUnitTest.java Normal file
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package com.baeldung.convert.exceldatatolist;
import static org.junit.Assert.assertEquals;
import java.io.IOException;
import java.util.List;
// import org.junit.jupiter.api.Test;
// import static org.junit.jupiter.api.Assertions.*;
import org.junit.Test;
import com.baeldung.convert.exceldatatolist.fastexcel.ExcelDataToListOfObjectsFastExcel;
import com.baeldung.convert.exceldatatolist.jexcelapi.ExcelDataToListOfObjectsJxl;
import com.baeldung.convert.exceldatatolist.poi.ExcelDataToListApachePOI;
import com.baeldung.convert.exceldatatolist.poiji.ExcelDataToListOfObjectsPOIJI;
import jxl.read.biff.BiffException;
public class ExcelDataToListOfObjectsUnitTest {
@Test
public void whenParsingExcelFileWithPOIJI_thenConvertsToList() throws IOException {
List<FoodInfo> foodInfoList = ExcelDataToListOfObjectsPOIJI.excelDataToListOfObjets_withPOIJI("src/main/resources/food_info.xlsx");
assertEquals("Beverages", foodInfoList.get(0).getCategory());
assertEquals("Dairy", foodInfoList.get(3).getCategory());
}
@Test
public void whenParsingExcelFileWithApachePOI_thenConvertsToList() throws IOException {
List<FoodInfo> foodInfoList = ExcelDataToListApachePOI.excelDataToListOfObjets_withApachePOI("src/main/resources/food_info.xlsx");
assertEquals("Beverages", foodInfoList.get(0).getCategory());
assertEquals("Dairy", foodInfoList.get(3).getCategory());
}
@Test
public void whenParsingExcelFileWithFastExcel_thenConvertsToList() throws IOException {
List<FoodInfo> foodInfoList = ExcelDataToListOfObjectsFastExcel.excelDataToListOfObjets_withFastExcel("src/main/resources/food_info.xlsx");
assertEquals("Beverages", foodInfoList.get(0).getCategory());
assertEquals("Dairy", foodInfoList.get(3).getCategory());
}
@Test
public void whenParsingExcelFileWithJxl_thenConvertsToList() throws IOException, BiffException {
List<FoodInfo> foodInfoList = ExcelDataToListOfObjectsJxl.excelDataToListOfObjets_withJxl("src/main/resources/food_info.xls");
assertEquals("Beverages", foodInfoList.get(0).getCategory());
assertEquals("Dairy", foodInfoList.get(3).getCategory());
}
}