Created
January 15, 2024 13:13
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Java Code to Read the Excel file and return a hash map using poi
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| package com.oncor.ams.core.managers.excel; | |
| import java.io.File; | |
| import java.io.FileInputStream; | |
| import java.io.IOException; | |
| import java.util.ArrayList; | |
| import java.util.HashMap; | |
| import java.util.Iterator; | |
| import java.util.List; | |
| import java.util.Map; | |
| import org.apache.poi.ss.usermodel.Cell; | |
| import org.apache.poi.ss.usermodel.Row; | |
| import org.apache.poi.xssf.usermodel.XSSFSheet; | |
| import org.apache.poi.xssf.usermodel.XSSFWorkbook; | |
| import com.beust.jcommander.internal.Lists; | |
| /** | |
| * Refer this link: https://howtodoinjava.com/java/library/readingwriting-excel-files-in-java-poi-tutorial/ | |
| * | |
| */ | |
| public class ExcelManager { | |
| public Map<String, String> getExcelRowData(String fileName, String sheetName, String rowId) throws IOException { | |
| //Define the column names here or pass it as a parameter to make this method resuable | |
| List<String> clmNamesList = Lists.newArrayList("TD_ID","CC_URL","CC_UserID","CC_Pwd","MeterNum","MeterType","MeterModel","Command"); | |
| // List<String> returnList = new ArrayList<>(); | |
| Map<String, String> returnMap = new HashMap<>(); | |
| FileInputStream file = new FileInputStream(new File(fileName)); | |
| XSSFWorkbook workbook = new XSSFWorkbook(file); | |
| XSSFSheet sheet = workbook.getSheet(sheetName); | |
| //Iterate through each rows one by one | |
| Iterator<Row> rowIterator = sheet.iterator(); | |
| //Get the row id which mathces the row id passed in the method and then get the data from the row and save in the list | |
| while (rowIterator.hasNext()) { | |
| Row row = rowIterator.next(); | |
| if (row.getCell(0).getStringCellValue().equalsIgnoreCase(rowId)){ | |
| Iterator<Cell> cellIterator = row.cellIterator(); | |
| while (cellIterator.hasNext()) { | |
| Cell cell = cellIterator.next(); | |
| returnMap.put(clmNamesList.get(cell.getColumnIndex()), cell.getStringCellValue()); | |
| // returnList.add(cell.getStringCellValue()); | |
| } | |
| break; | |
| } | |
| } | |
| workbook.close(); | |
| file.close(); | |
| return returnMap; | |
| } | |
| } | |
| /* | |
| <dependency> | |
| <groupId>org.apache.poi</groupId> | |
| <artifactId>poi</artifactId> | |
| <version>5.2.2</version> | |
| </dependency> | |
| <dependency> | |
| <groupId>org.apache.poi</groupId> | |
| <artifactId>poi-ooxml</artifactId> | |
| <version>5.2.2</version> | |
| </dependency> | |
| */ |
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