package com.java110.utils.util;
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import org.apache.poi.hssf.usermodel.HSSFCell;
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import org.apache.poi.ss.usermodel.Cell;
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import org.apache.poi.ss.usermodel.Row;
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import org.apache.poi.ss.usermodel.Sheet;
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import org.apache.poi.ss.usermodel.Workbook;
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import org.apache.poi.xssf.usermodel.XSSFCell;
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import org.apache.poi.xssf.usermodel.XSSFWorkbook;
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import org.springframework.web.multipart.MultipartFile;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.text.DecimalFormat;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Excel导入工具类
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*
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* @author Evan.Zhang
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*/
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public class ImportExcelUtils {
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/**
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* 创建WorkBook对象
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*
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* @param filePath
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* @return
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* @throws IOException
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*/
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public static final Workbook createWorkbook(String filePath) throws IOException {
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if (filePath.trim().toLowerCase().endsWith("xls")) {
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return new XSSFWorkbook(new FileInputStream(filePath));
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} else if (filePath.trim().toLowerCase().endsWith("xlsx")) {
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return new XSSFWorkbook(new FileInputStream(filePath));
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} else {
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throw new IllegalArgumentException("不是有效的excel文件格式");
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}
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}
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/**
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* 创建WorkBook对象
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*
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* @param uploadFile
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* @return
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* @throws IOException
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*/
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public static final Workbook createWorkbook(MultipartFile uploadFile) throws IOException {
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return new XSSFWorkbook(uploadFile.getInputStream());
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}
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/**
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* 获取Sheet页面(按名称)
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*
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* @param wb
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* @param sheetName
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* @return
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*/
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public static final Sheet getSheet(Workbook wb, String sheetName) {
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return wb.getSheet(sheetName);
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}
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/**
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* 获取Sheet页面(按页标)
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*
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* @param wb
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* @param index
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* @return
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*/
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public static final Sheet getSheet(Workbook wb, int index) {
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return wb.getSheetAt(index);
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}
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/**
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* 获取Sheet页内容
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*
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* @param sheet
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* @return
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*/
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public static final List<Object[]> listFromSheet(Sheet sheet) {
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if(sheet == null){
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throw new IllegalArgumentException("excel sheet 未找到，请不要篡改excel模板");
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}
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List<Object[]> list = new ArrayList<Object[]>();
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for (int r = sheet.getFirstRowNum(); r <= sheet.getLastRowNum(); r++) {
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Row row = sheet.getRow(r);
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if (row == null || row.getPhysicalNumberOfCells() == 0) continue;
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Object[] cells = new Object[row.getLastCellNum()];
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for (int c = row.getFirstCellNum(); c <= row.getLastCellNum(); c++) {
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Cell cell = row.getCell(c);
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if (cell == null) continue;
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//判断是否为日期类型
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cells[c] = getValueFromCell(cell);
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}
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list.add(cells);
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}
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return list;
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}
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/**
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* 获取单元格内信息
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*
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* @param cell
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* @return
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*/
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public static final Object getValueFromCell(Cell cell) {
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if (cell == null) {
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//System.out.println("Cell is null !!!");
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return null;
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}
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Object result = null;
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if (cell instanceof HSSFCell) {
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if (cell != null) {
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// 单元格类型：Numeric:0,String:1,Formula:2,Blank:3,Boolean:4,Error:5
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int cellType = ((HSSFCell) cell).getCellType();
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switch (cellType) {
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case HSSFCell.CELL_TYPE_STRING:
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result = ((HSSFCell) cell).getStringCellValue();
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break;
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case HSSFCell.CELL_TYPE_NUMERIC:
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DecimalFormat df = new DecimalFormat("###.####");
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result = df.format(((HSSFCell) cell).getNumericCellValue());
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break;
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case HSSFCell.CELL_TYPE_FORMULA:
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throw new IllegalArgumentException("请不要公式计算，程序没法计算Excel的公式");
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case HSSFCell.CELL_TYPE_BOOLEAN:
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result = ((HSSFCell) cell).getBooleanCellValue();
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break;
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case HSSFCell.CELL_TYPE_BLANK:
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result = null;
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break;
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case HSSFCell.CELL_TYPE_ERROR:
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result = null;
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break;
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default:
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System.out.println("枚举了所有类型");
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break;
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}
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}
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} else if (cell instanceof XSSFCell) {
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if (cell != null) {
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// 单元格类型：Numeric:0,String:1,Formula:2,Blank:3,Boolean:4,Error:5
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int cellType = ((XSSFCell) cell).getCellType();
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switch (cellType) {
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case XSSFCell.CELL_TYPE_STRING:
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result = ((XSSFCell) cell).getRichStringCellValue().getString();
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break;
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case XSSFCell.CELL_TYPE_NUMERIC:
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DecimalFormat df = new DecimalFormat("###.####");
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result = df.format(((XSSFCell) cell).getNumericCellValue());
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break;
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case XSSFCell.CELL_TYPE_FORMULA:
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//result = ((XSSFCell) cell).getNumericCellValue();
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throw new IllegalArgumentException("请不要公式计算，程序没法计算Excel的公式");
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case XSSFCell.CELL_TYPE_BOOLEAN:
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result = ((XSSFCell) cell).getBooleanCellValue();
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break;
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case XSSFCell.CELL_TYPE_BLANK:
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result = null;
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break;
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case XSSFCell.CELL_TYPE_ERROR:
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result = null;
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break;
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default:
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//System.out.println("枚举了所有类型");
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break;
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}
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}
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}
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return result;
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}
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/**
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* 根据Sheet页导入Excel信息
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*
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* @param filePath 文件路径
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* @param sheetIndex Sheet页下标
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* @param startRow 开始列 ：默认第一列
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* @param startLine 开始行 ：默认第一行
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* @throws Exception
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*/
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public static final List<Object[]> importExcelBySheetIndex(String filePath, int sheetIndex
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, int startRow, int startLine) throws Exception {
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List<Object[]> resultList = null;
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//创建WorkBook对象
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Workbook wb = createWorkbook(filePath);
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// 获取Sheet
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Sheet sheet = ImportExcelUtils.getSheet(wb, sheetIndex);
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// 判断Sheet是否为空
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if (sheet != null) {
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// 遍历Sheet
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List<Object[]> list = ImportExcelUtils.listFromSheet(sheet);
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if (list != null && list.size() > 0) {
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resultList = new ArrayList<Object[]>();
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if (startLine <= list.size()) {
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for (int i = startLine; i < list.size(); i++) {
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int nullCount = 0;
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Object[] rows = list.get(i);
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if (rows != null && rows.length > 0) {
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List<Object> resultObjects = new ArrayList<Object>();
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for (int n = startRow; n < rows.length; n++) {
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if (Assert.objIsEmpty(rows[n])) {
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nullCount++;
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}
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resultObjects.add(rows[n]);
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}
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//判断空的单元格个数
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if (nullCount >= rows.length) {
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break;
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} else {
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resultList.add(resultObjects.toArray());
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}
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}
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}
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}
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}
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}
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return resultList;
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}
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}
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