excel 匯入匯出 poi工具類
阿新 • • 發佈：2019-02-18
package com.poi; import java.util.List; import org.apache.poi.hssf.usermodel.HSSFCellStyle; /** * <pre> * Title: ExcelEntity.java * Description: * Copyright: Maple Copyright (c) 2013 * Company: * </pre> * * @author duanke * @version 1.0 * @date 2013年12月31日 */ public class ExcelEntity { private String sheetName; // excel 名稱 private String[] columnNames; // 列名 private String[] propertyNames; // 屬性名稱 private String[] cLabels; private int rpp = 200; private HSSFCellStyle style = null; @SuppressWarnings("rawtypes") private List resultList; public String getSheetName() { return sheetName; } public void setSheetName(String sheetName) { this.sheetName = sheetName; } public String[] getColumnNames() { return columnNames; } public void setColumnNames(String[] columnNames) { this.columnNames = columnNames; } public String[] getPropertyNames() { return propertyNames; } public void setPropertyNames(String[] propertyNames) { this.propertyNames = propertyNames; } public String[] getCLabels() { return cLabels; } public void setCLabels(String[] labels) { cLabels = labels; } public int getRpp() { return rpp; } public void setRpp(int rpp) { this.rpp = rpp; } public HSSFCellStyle getStyle() { return style; } public void setStyle(HSSFCellStyle style) { this.style = style; } @SuppressWarnings("rawtypes") public List getResultList() { return resultList; } @SuppressWarnings("rawtypes") public void setResultList(List resultList) { this.resultList = resultList; } }
package com.poi; import java.io.IOException; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Iterator; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletResponse; 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.HSSFRichTextString; 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.Region; /** * <pre> * Title: ExportExcelUtil.java * Description: * Copyright: Maple Copyright (c) 2013 * Company: * </pre> * * @author duanke * @version 1.0 * @date 2013年12月31日 */ public class ExportExcelUtil { /** * 建立Excel表格 * * @param object * @param outStream * @throws Exception */ @SuppressWarnings("rawtypes") public static void exportExcel(ExcelEntity object, OutputStream outStream) throws Exception { HSSFWorkbook wb = new HSSFWorkbook(); HSSFSheet sheet = wb.createSheet(object.getSheetName()); HSSFRow row = sheet.createRow(0);// 建立第一行 HSSFCell cell = row.createCell(0);// 建立第一行的第一個單元格 cell.setCellValue("序號"); String[] colNames = object.getColumnNames(); String[] propertys = object.getPropertyNames(); for (int i = 0; i < colNames.length; i++) { // 新增列名，從第一行的第二個單元格開始新增 row.createCell(i + 1).setCellValue(colNames[i]); } Iterator it = object.getResultList().iterator(); int rowNum = 1; // 從第二行開始新增資料 while (it.hasNext()) { Map map = (Map) it.next(); HSSFRow rw = sheet.createRow(rowNum); rw.createCell(0).setCellValue(rowNum); // 新增序號 rowNum++; for (int x = 0; x < propertys.length; x++) { String property = propertys[x]; if (map.containsKey(property)) { Object value = map.get(propertys[x]); // 根據屬性名稱得到屬性值 if (value == null || "null".equalsIgnoreCase(value.toString())) { value = ""; } rw.createCell(x + 1).setCellValue(value + ""); } else { rw.createCell(x + 1).setCellValue(""); } } } try { wb.write(outStream); outStream.flush(); outStream.close(); } catch (IOException e) { if (outStream != null) { outStream.close(); } e.printStackTrace(); } } /** * 匯出Excel * * @param response * @param list * @param columns * @param propertyNames * @throws IOException * @throws UnsupportedEncodingException * @throws Exception */ @SuppressWarnings("rawtypes") public static void exportView(HttpServletResponse response, List<Map> list, String[] columns, String[] propertyNames) throws IOException, UnsupportedEncodingException, Exception { SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss"); ExcelEntity entity = new ExcelEntity(); entity.setColumnNames(columns); entity.setPropertyNames(propertyNames); entity.setResultList(list); entity.setSheetName(sdf.format(new Date())); OutputStream outStream = response.getOutputStream(); response.setContentType("application/vnd.ms-excel;charset=UTF-8"); String fileName = sdf.format(new Date()) + ".xls"; response.setHeader("Content-Disposition", "attachment;filename=" + new String(fileName.getBytes("GBK"), "iso8859-1")); exportExcel(entity, outStream); } /** * 建立通用EXCEL頭部 * * @param headString * 頭部顯示的字元 * @param colSum * 該報表的列數 */ @SuppressWarnings("deprecation") public void createNormalHead(String headString, int colSum, String sheetName) { HSSFWorkbook wb = new HSSFWorkbook(); HSSFSheet sheet = wb.createSheet(sheetName); HSSFRow row = sheet.createRow(0); // 設定第一行 HSSFCell cell = row.createCell(0); row.setHeight((short) 400); // 定義單元格為字串型別 cell.setCellType(HSSFCell.ENCODING_UTF_16); cell.setCellValue(new HSSFRichTextString(headString)); // 指定合併區域 sheet.addMergedRegion(new Region(0, (short) 0, 0, (short) colSum)); HSSFCellStyle cellStyle = wb.createCellStyle(); cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 指定單元格居中對齊 cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 指定單元格垂直居中對齊 cellStyle.setWrapText(true);// 指定單元格自動換行 // 設定單元格字型 HSSFFont font = wb.createFont(); font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); font.setFontName("宋體"); font.setFontHeight((short) 300); cellStyle.setFont(font); cell.setCellStyle(cellStyle); } }
package com.poi; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.commons.io.FilenameUtils; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.DateUtil; 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.ss.util.CellReference; import org.apache.poi.xssf.usermodel.XSSFWorkbook; /** * <pre> * Title: ReadExcel.java * Description: * Copyright: Maple Copyright (c) 2013 * Company: * </pre> * * @author duanke * @version 1.0 * @date 2013年12月31日 */ public class ReadExcel { /** * Excel 2003 */ private final static String XLS = "xls"; /** * Excel 2007 */ private final static String XLSX = "xlsx"; /** * 由Excel檔案的Sheet匯出至List * * @param file * 匯入的excel檔案 * @param sheetNum * excel工作空間,一般情況為0 * @return */ public static List<Map<String, Object>> exportListFromExcel(File file, int sheetNum) throws IOException { return exportListFromExcel(new FileInputStream(file), FilenameUtils.getExtension(file.getName()), sheetNum); } /** * 由Excel流的Sheet匯出至List * * @param is * @param extensionName * @param sheetNum * @return * @throws IOException */ public static List<Map<String, Object>> exportListFromExcel(InputStream is, String extensionName, int sheetNum) throws IOException { Workbook workbook = null; if (extensionName.toLowerCase().equals(XLS)) { workbook = new HSSFWorkbook(is); } else if (extensionName.toLowerCase().equals(XLSX)) { workbook = new XSSFWorkbook(is); } return readCell(workbook, sheetNum); } /** * 讀取Cell的值 * * @param sheet * @return */ public static List<Map<String, Object>> readCell(Workbook workbook, int sheetNum) { Sheet sheet = workbook.getSheetAt(sheetNum); // 解析公式結果 // FormulaEvaluator evaluator = workbook.getCreationHelper().createFormulaEvaluator(); List<Map<String, Object>> list = new ArrayList<Map<String, Object>>(); // 遍歷所有行 // for (Row row : sheet) // 除去表頭即第一行 for (int i = 1; i <= sheet.getLastRowNum(); i++) { Row row = sheet.getRow(i); Map<String, Object> map = new HashMap<String, Object>(); // 便利所有列 for (Cell cell : row) { // 獲取單元格的型別 CellReference cellRef = new CellReference(row.getRowNum(), cell.getColumnIndex()); String key = cellRef.formatAsString(); switch (cell.getCellType()) { // 字串 case Cell.CELL_TYPE_STRING: map.put(key, cell.getRichStringCellValue().getString()); break; // 數字 case Cell.CELL_TYPE_NUMERIC: if (DateUtil.isCellDateFormatted(cell)) { map.put(key, cell.getDateCellValue()); } else { map.put(key, cell.getNumericCellValue()); } break; // boolean case Cell.CELL_TYPE_BOOLEAN: map.put(key, cell.getBooleanCellValue()); break; // 方程式 case Cell.CELL_TYPE_FORMULA: map.put(key, cell.getCellFormula()); break; case Cell.CELL_TYPE_BLANK: break; case Cell.CELL_TYPE_ERROR: break; // 空值 default: map.put(key, ""); } } list.add(map); } return list; } public static void main(String[] args) throws IOException { // String paths = "c:\\excel.xlsx"; String paths = ReadExcel.class.getResource("c:\\excel.xlsx").getFile(); List<Map<String, Object>> lists = ReadExcel.exportListFromExcel(new File(paths), 0); System.out.println(lists); } }
自行測試匯入jar包poi-3.7.jar、poi-ooxml-3.7.jar、poi-ooxml-schemas-3.7.jar、dom4j-1.6.1.jar、commons-io-2.4.jar