java 對excel 模板的讀取，寫入值操作
阿新 • • 發佈：2019-01-23
自己的備忘錄
jar包不一定全部都要
<dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.15</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId><version>3.15</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.4</version> </dependency> <dependency> <groupId>commons-dbutils</groupId><artifactId>commons-dbutils</artifactId> <version>1.6</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-scratchpad</artifactId> <version>3.9</version> </dependency> <dependency><groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.2</version> </dependency>
@Data public class ExcelNode { private int sheet; //sheet頁 // 第一個map key 是 row 多少行，第二個map key是cell 多少列，vlaue 是值 private Map<Integer,Map<Integer,String>> value; //設定多個sheet頁，第一個map key 是sheet頁，第二個map key 是 row 多少行，第三個map key是cell 多少列，vlaue 是值 private Map<Integer, Map<Integer,Map<Integer,String>>> setSheets; }
因為模板在專案裡，所以這樣讀，如果要讀磁碟上的可以這樣
String filePath = "C:\\Users\\Administrator\\Desktop\\1.xlsx"; File file = new File(filePath); XSSFWorkbook wb = new XSSFWorkbook(new FileInputStream(file));
import com.fangfa.jiliang.dto.ExcelNode; 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.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.DateUtil; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Workbook; 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 java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; /** * 對excel 模板讀取，寫入值操作 * @author green * @date 2018/6/14/014 */ public class ExcelUtil { /** * 寫入excel模板，對單個sheet頁 *@author gl *@date 2018/6/14/014 *@param *@return */ public static Workbook writeExcelBySingletSheet(String templatePath, ExcelNode excelNode){ String end = templatePath.substring(templatePath.lastIndexOf("."),templatePath.length()); if(end.equalsIgnoreCase("xls")){ return writeToExcelBySingletSheetEndXls(templatePath,excelNode); }else { return writeToExcelBySingletSheetEndXlsx(templatePath,excelNode); } } /** * 寫入excel模板，對多個sheet頁 *@author gl *@date 2018/6/14/014 *@param *@return */ public static Workbook writeExcelByMoreSheet(String templatePath, ExcelNode excelNode){ String end = templatePath.substring(templatePath.lastIndexOf("."),templatePath.length()); if(end.equalsIgnoreCase("xls")){ return writeToExcelByMoreSheetEndXls(templatePath,excelNode); }else { return writeToExcelByMoreSheetEndXlsx(templatePath,excelNode); } } /** * 寫入excel模板，對單個sheet頁寫入,主要在使用之前一定要，使用printExcel方法，（在最下面） * 檢查一下你要替換的內容在那個部位;該方法只能用於 .xlsx 結尾的 *@author gl *@date 2018/6/14/014 *@param templatePath:是檔案模板路徑，excelNode 資料物件 *@return */ public static XSSFWorkbook writeToExcelBySingletSheetEndXlsx(String templatePath, ExcelNode excelNode){ try { InputStream in = UploadAndDownloadUtil.class.getClassLoader().getResourceAsStream(templatePath); XSSFWorkbook workbook = new XSSFWorkbook(in); XSSFSheet sheet = workbook.getSheetAt(excelNode.getSheet()); excelNode.getValue().forEach( (k,v) -> { XSSFRow row = sheet.getRow(k); v.forEach( (k1,v1) -> { row.getCell(k1).setCellValue(v1); }); }); return workbook; } catch (IOException e) { e.printStackTrace(); } return null; } /** * 寫入excel模板，對多個sheet頁寫入,該方法只能用於 .xlsx 結尾的 *@author gl *@date 2018/6/14/014 *@param *@return */ public static XSSFWorkbook writeToExcelByMoreSheetEndXlsx(String templatePath, ExcelNode excelNode){ try { InputStream in = UploadAndDownloadUtil.class.getClassLoader().getResourceAsStream(templatePath); XSSFWorkbook workbook = new XSSFWorkbook(in); excelNode.getSetSheets().forEach((k,v)->{ XSSFSheet sheet = workbook.getSheetAt(k); v.forEach( (k1,v1) -> { XSSFRow row = sheet.getRow(k1); v1.forEach( (k2,v2) -> { row.getCell(k2).setCellValue(v2); }); }); }); return workbook; } catch (IOException e) { e.printStackTrace(); } return null; } /** * 該方法只能用於 .xls 結尾的 *@author gl *@date 2018/6/14/014 *@param templatePath:是檔案模板路徑，excelNode 資料物件 *@return */ public static HSSFWorkbook writeToExcelBySingletSheetEndXls(String templatePath, ExcelNode excelNode){ try { InputStream in = UploadAndDownloadUtil.class.getClassLoader().getResourceAsStream(templatePath); HSSFWorkbook workbook = new HSSFWorkbook(in); HSSFSheet sheet = workbook.getSheetAt(excelNode.getSheet()); excelNode.getValue().forEach( (k,v) -> { HSSFRow row = sheet.getRow(k); v.forEach( (k1,v1) -> { row.getCell(k1).setCellValue(v1); }); }); return workbook; } catch (IOException e) { e.printStackTrace(); } return null; } /** * 寫入excel模板，對多個sheet頁寫入,該方法只能用於 .xls 結尾的 *@author gl *@date 2018/6/14/014 *@param *@return */ public static HSSFWorkbook writeToExcelByMoreSheetEndXls(String templatePath, ExcelNode excelNode){ try { InputStream in = UploadAndDownloadUtil.class.getClassLoader().getResourceAsStream(templatePath); HSSFWorkbook workbook = new HSSFWorkbook(in); excelNode.getSetSheets().forEach((k,v)->{ HSSFSheet sheet = workbook.getSheetAt(k); v.forEach( (k1,v1) -> { HSSFRow row = sheet.getRow(k1); v1.forEach( (k2,v2) -> { row.getCell(k2).setCellValue(v2); }); }); }); return workbook; } catch (IOException e) { e.printStackTrace(); } return null; } public static void checkRowCell(XSSFCell cell, int i, int j) { switch (cell.getCellType()) { case Cell.CELL_TYPE_STRING: System.out.println(cell.getRichStringCellValue().getString() + "="+i+":"+j); break; case Cell.CELL_TYPE_NUMERIC: if (DateUtil.isCellDateFormatted(cell)) { System.out.println(String.valueOf(cell.getDateCellValue()) + "="+i+":"+j); } else { System.out.println(cell.getNumericCellValue() + "="+i+":"+j); } break; case Cell.CELL_TYPE_BOOLEAN: System.out.println(cell.getBooleanCellValue() + "="+i+":"+j); break; default: } } public static void printExcel(String path) throws IOException { File file = new File(path); XSSFWorkbook wb = new XSSFWorkbook(new FileInputStream(file)); XSSFSheet sheet = wb.getSheetAt(0); int rowcount = sheet.getLastRowNum() - sheet.getFirstRowNum(); int rowcount1 = sheet.getPhysicalNumberOfRows(); System.out.println(rowcount1); System.out.println("該excle的總行數為：" + (rowcount + 1) + "行 ！"); for (int i = 0; i < rowcount + 1; i++) { Row row = sheet.getRow(i); if (row != null) { for (int j = row.getFirstCellNum(); j < row.getLastCellNum(); j++) { XSSFCell cell = (XSSFCell) row.getCell(j); if (cell != null) { ExcelUtil.checkRowCell(cell,i,j); } } } } } public static void main(String[] args) throws IOException { printExcel("C:\\Users\\Administrator\\Desktop\\1.xlsx"); } }
為什麼要先把行列讀出來呢？
在有些複雜的excel，有很多合併，行列並不是眼睛看上去的那樣，先讀出來在來對應