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[JAVA-28185] (#15367)

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* [JAVA-28185] Moved code for article(Introduction to HtmlUnit) to spring-mvc-java-2

* [JAVA-28185] Moved code for article(Upload and Display Excel Files with Spring MVC) to spring-mvc-java-2

* [JAVA-28185] Clean up

* [JAVA-28185]
This commit is contained in:
panos-kakos
2023-12-09 21:15:35 +02:00
committed by GitHub
parent bb989a8fe3
commit f624403a86
13 changed files with 121 additions and 61 deletions
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spring-web-modules/spring-mvc-java/src/main/java/com/baeldung/excel/ExcelPOIHelper.java
-185
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@@ -1,185 +0,0 @@
package com.baeldung.excel;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFColor;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.DateUtil;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Map;
import java.util.HashMap;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.IntStream;
public class ExcelPOIHelper {
public Map<Integer, List<MyCell>> readExcel(String fileLocation) throws IOException {
Map<Integer, List<MyCell>> data = new HashMap<>();
FileInputStream fis = new FileInputStream(new File(fileLocation));
if (fileLocation.endsWith(".xls")) {
data = readHSSFWorkbook(fis);
} else if (fileLocation.endsWith(".xlsx")) {
data = readXSSFWorkbook(fis);
}
int maxNrCols = data.values().stream()
.mapToInt(List::size)
.max()
.orElse(0);
data.values().stream()
.filter(ls -> ls.size() < maxNrCols)
.forEach(ls -> {
IntStream.range(ls.size(), maxNrCols)
.forEach(i -> ls.add(new MyCell("")));
});
return data;
}
private String readCellContent(Cell cell) {
String content;
switch (cell.getCellTypeEnum()) {
case STRING:
content = cell.getStringCellValue();
break;
case NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
content = cell.getDateCellValue() + "";
} else {
content = cell.getNumericCellValue() + "";
}
break;
case BOOLEAN:
content = cell.getBooleanCellValue() + "";
break;
case FORMULA:
content = cell.getCellFormula() + "";
break;
default:
content = "";
}
return content;
}
private Map<Integer, List<MyCell>> readHSSFWorkbook(FileInputStream fis) throws IOException {
Map<Integer, List<MyCell>> data = new HashMap<>();
HSSFWorkbook workbook = null;
try {
workbook = new HSSFWorkbook(fis);
HSSFSheet sheet = workbook.getSheetAt(0);
for (int i = sheet.getFirstRowNum(); i <= sheet.getLastRowNum(); i++) {
HSSFRow row = sheet.getRow(i);
data.put(i, new ArrayList<>());
if (row != null) {
for (int j = 0; j < row.getLastCellNum(); j++) {
HSSFCell cell = row.getCell(j);
if (cell != null) {
HSSFCellStyle cellStyle = cell.getCellStyle();
MyCell myCell = new MyCell();
HSSFColor bgColor = cellStyle.getFillForegroundColorColor();
if (bgColor != null) {
short[] rgbColor = bgColor.getTriplet();
myCell.setBgColor("rgb(" + rgbColor[0] + "," + rgbColor[1] + "," + rgbColor[2] + ")");
}
HSSFFont font = cell.getCellStyle()
.getFont(workbook);
myCell.setTextSize(font.getFontHeightInPoints() + "");
if (font.getBold()) {
myCell.setTextWeight("bold");
}
HSSFColor textColor = font.getHSSFColor(workbook);
if (textColor != null) {
short[] rgbColor = textColor.getTriplet();
myCell.setTextColor("rgb(" + rgbColor[0] + "," + rgbColor[1] + "," + rgbColor[2] + ")");
}
myCell.setContent(readCellContent(cell));
data.get(i)
.add(myCell);
} else {
data.get(i)
.add(new MyCell(""));
}
}
}
}
} finally {
if (workbook != null) {
workbook.close();
}
}
return data;
}
private Map<Integer, List<MyCell>> readXSSFWorkbook(FileInputStream fis) throws IOException {
XSSFWorkbook workbook = null;
Map<Integer, List<MyCell>> data = new HashMap<>();
try {
workbook = new XSSFWorkbook(fis);
XSSFSheet sheet = workbook.getSheetAt(0);
for (int i = sheet.getFirstRowNum(); i <= sheet.getLastRowNum(); i++) {
XSSFRow row = sheet.getRow(i);
data.put(i, new ArrayList<>());
if (row != null) {
for (int j = 0; j < row.getLastCellNum(); j++) {
XSSFCell cell = row.getCell(j);
if (cell != null) {
XSSFCellStyle cellStyle = cell.getCellStyle();
MyCell myCell = new MyCell();
XSSFColor bgColor = cellStyle.getFillForegroundColorColor();
if (bgColor != null) {
byte[] rgbColor = bgColor.getRGB();
myCell.setBgColor("rgb(" + (rgbColor[0] < 0 ? (rgbColor[0] + 0xff) : rgbColor[0]) + "," + (rgbColor[1] < 0 ? (rgbColor[1] + 0xff) : rgbColor[1]) + "," + (rgbColor[2] < 0 ? (rgbColor[2] + 0xff) : rgbColor[2]) + ")");
}
XSSFFont font = cellStyle.getFont();
myCell.setTextSize(font.getFontHeightInPoints() + "");
if (font.getBold()) {
myCell.setTextWeight("bold");
}
XSSFColor textColor = font.getXSSFColor();
if (textColor != null) {
byte[] rgbColor = textColor.getRGB();
myCell.setTextColor("rgb(" + (rgbColor[0] < 0 ? (rgbColor[0] + 0xff) : rgbColor[0]) + "," + (rgbColor[1] < 0 ? (rgbColor[1] + 0xff) : rgbColor[1]) + "," + (rgbColor[2] < 0 ? (rgbColor[2] + 0xff) : rgbColor[2]) + ")");
}
myCell.setContent(readCellContent(cell));
data.get(i)
.add(myCell);
} else {
data.get(i)
.add(new MyCell(""));
}
}
}
}
} finally {
if (workbook != null) {
workbook.close();
}
}
return data;
}
}
spring-web-modules/spring-mvc-java/src/main/java/com/baeldung/excel/MyCell.java
-57
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@@ -1,57 +0,0 @@
package com.baeldung.excel;
public class MyCell {
private String content;
private String textColor;
private String bgColor;
private String textSize;
private String textWeight;
public MyCell() {
}
public MyCell(String content) {
this.content = content;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public String getTextColor() {
return textColor;
}
public void setTextColor(String textColor) {
this.textColor = textColor;
}
public String getBgColor() {
return bgColor;
}
public void setBgColor(String bgColor) {
this.bgColor = bgColor;
}
public String getTextSize() {
return textSize;
}
public void setTextSize(String textSize) {
this.textSize = textSize;
}
public String getTextWeight() {
return textWeight;
}
public void setTextWeight(String textWeight) {
this.textWeight = textWeight;
}
}
spring-web-modules/spring-mvc-java/src/main/java/com/baeldung/spring/web/config/WebConfig.java
-6
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@@ -27,7 +27,6 @@ import org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver;
import org.thymeleaf.spring4.view.ThymeleafViewResolver;
import org.thymeleaf.templateresolver.ITemplateResolver;
import com.baeldung.excel.ExcelPOIHelper;
@EnableWebMvc
@Configuration
@@ -118,11 +117,6 @@ public class WebConfig implements WebMvcConfigurer {
configurer.setUrlPathHelper(urlPathHelper);
}
@Bean
public ExcelPOIHelper excelPOIHelper() {
return new ExcelPOIHelper();
}
@Bean(name = "multipartResolver")
public CommonsMultipartResolver multipartResolver() {
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
spring-web-modules/spring-mvc-java/src/main/java/com/baeldung/web/controller/ExcelController.java
-63
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@@ -1,63 +0,0 @@
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 java.util.Map;
import java.util.List;
import javax.annotation.Resource;
@Controller
public class ExcelController {
private String fileLocation;
@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();
model.addAttribute("message", "File: " + file.getOriginalFilename() + " has been uploaded successfully!");
return "excel";
}
@RequestMapping(method = RequestMethod.GET, value = "/readPOI")
public String readPOI(Model model) throws IOException {
if (fileLocation != null) {
if (fileLocation.endsWith(".xlsx") || fileLocation.endsWith(".xls")) {
Map<Integer, List<MyCell>> data = excelPOIHelper.readExcel(fileLocation);
model.addAttribute("data", data);
} else {
model.addAttribute("message", "Not a valid excel file!");
}
} else {
model.addAttribute("message", "File missing! Please upload an excel file.");
}
return "excel";
}
}