Java tutorial
/* * Excel2JSON * * Copyright (c) 2015 Niles Madison * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.niles.excel2json.objects; import com.niles.excel2json.constants.StringConstants; import com.niles.excel2json.tools.SystemTools; import org.apache.poi.xssf.usermodel.XSSFCell; import org.apache.poi.xssf.usermodel.XSSFRow; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.json.simple.JSONArray; import org.json.simple.JSONObject; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.File; import java.io.FileInputStream; import java.io.FileWriter; import java.io.IOException; import java.util.HashMap; public class ExcelFile { private final static Logger logger = LoggerFactory.getLogger(ExcelFile.class.getName()); String path; String fileName; String folderPath; String sheetName; public ExcelFile(String path) { this.path = path; } public void setPath(String path) { this.path = path; } public void process() throws Exception { File excel = new File(path); FileInputStream fis = SystemTools.getFileInputStream(excel); XSSFWorkbook wb = null; try { wb = new XSSFWorkbook(fis); } catch (IOException ex) { logger.error("Unable to process file [{}]\r\n{}", path, ex.getMessage()); return; } this.fileName = excel.getName().replace(StringConstants.XLSX, ""); this.folderPath = fileName + " Files"; folderPath = SystemTools.createFolder(folderPath); int sheetCount = wb.getNumberOfSheets(); int currentSheetNumber = 0; int rowCount = 0; int columnCount = 0; HashMap<Integer, String> headers = new HashMap<Integer, String>(); /* * Itterate through the Excel sheets here and convert them to JSON */ while (currentSheetNumber < sheetCount) { XSSFSheet current = wb.getSheetAt(currentSheetNumber); sheetName = current.getSheetName(); // System.out.println(sheetName); if (current.getRow(0) == null) { // logger.error("[{}] Sheet contains no data", sheetName); } else { //logger.info("[{}] Processing sheet", sheetName); rowCount = current.getLastRowNum() + 1; columnCount = current.getRow(0).getPhysicalNumberOfCells(); // System.out.println("Col Count: " + columnCount); // System.out.println("Row Count: " + rowCount); JSONArray myJSONArray = new JSONArray(); JSONObject currentJSONObject = null; for (int a = 0; a < rowCount; a++) { XSSFRow currentRow = current.getRow(a); if (a == 0) { logger.info("[{}] Loading header information", sheetName); for (int currentCellNumber = 0; currentCellNumber < columnCount; currentCellNumber++) { XSSFCell currentCell = currentRow.getCell(currentCellNumber); String header = "Header" + currentCellNumber; if (currentCell != null) { if (currentCell.getCellType() == XSSFCell.CELL_TYPE_STRING) { header = currentCell.getStringCellValue(); } if (currentCell.getCellType() == XSSFCell.CELL_TYPE_NUMERIC) { header = currentCell.getNumericCellValue() + ""; } } headers.put(currentCellNumber, header.replaceAll(" ", "")); } } else { currentJSONObject = new JSONObject(); for (int currentCellNumber = 0; currentCellNumber < columnCount; currentCellNumber++) { XSSFCell currentCell = currentRow.getCell(currentCellNumber); String value = ""; if (currentCell != null) { if (currentCell.getCellType() != XSSFCell.CELL_TYPE_ERROR && currentCell.getCellType() != XSSFCell.CELL_TYPE_FORMULA) { if (currentCell.getCellType() == XSSFCell.CELL_TYPE_STRING) { value = currentCell.getStringCellValue(); } if (currentCell.getCellType() == XSSFCell.CELL_TYPE_NUMERIC) { value = currentCell.getNumericCellValue() + ""; } if (currentCell.getCellType() == XSSFCell.CELL_TYPE_BOOLEAN) { value = currentCell.getBooleanCellValue() + ""; } if (value == null) { value = ""; } } } currentJSONObject.put(headers.get(currentCellNumber), value); } myJSONArray.add(currentJSONObject); } } writeToJson(myJSONArray); } currentSheetNumber++; } } public void writeToJson(JSONArray myJSONArray) { String jsFilePath = folderPath + sheetName.replaceAll(" ", "") + ".js"; String jsonFilePath = folderPath + sheetName.replaceAll(" ", "") + ".json"; logger.info("Writing file {}", jsFilePath); try { // Create file FileWriter JSONFileStream = SystemTools.getFileWriter(jsFilePath); JSONFileStream.write("var " + sheetName.replaceAll("-", "").replaceAll(" ", "") + " = " + myJSONArray.toJSONString() + ";"); // JSONFileStream.write(myJSONArray.toJSONString()); JSONFileStream.flush(); JSONFileStream.close(); } catch (IOException ex) { logger.error("[{}] Error writing JSON\r\n{}", jsFilePath, ex.getMessage()); } logger.info("Writing file {}", jsonFilePath); try { // Create file FileWriter JSONFileStream = SystemTools.getFileWriter(jsonFilePath); JSONFileStream.write(myJSONArray.toJSONString()); // JSONFileStream.write(myJSONArray.toJSONString()); JSONFileStream.flush(); JSONFileStream.close(); } catch (IOException ex) { logger.error("[{}] Error writing JSON\r\n{}", jsonFilePath, ex.getMessage()); } } }