Java Code Examples for org.apache.poi.xssf.usermodel.XSSFRow#createCell()

public static List<String> writeExcelHeader(XSSFWorkbook wb, XSSFSheet sheet, List<String> extraFields) {
    try {
        List<String> columns = externalNames(extraFields);
        sheet.setDefaultColumnWidth(20);
        XSSFRow titleRow = sheet.createRow(0);
        XSSFCellStyle horizontalCenter = wb.createCellStyle();
        horizontalCenter.setAlignment(HorizontalAlignment.CENTER);
        for (int i = 0; i < columns.size(); i++) {
            XSSFCell cell = titleRow.createCell(i);
            cell.setCellValue(columns.get(i));
            cell.setCellStyle(horizontalCenter);
        }
        return columns;
    } catch (Exception e) {
        return null;
    }
}
 

private MetaFile writeExcel(Map<String, List<String[]>> data) throws IOException {

    XSSFWorkbook workBook = new XSSFWorkbook();

    for (String model : data.keySet()) {
      XSSFSheet sheet = workBook.createSheet(model);
      int count = 0;
      for (String[] record : data.get(model)) {
        XSSFRow row = sheet.createRow(count);
        int cellCount = 0;
        for (String val : record) {
          XSSFCell cell = row.createCell(cellCount);
          cell.setCellValue(val);
          cellCount++;
        }
        count++;
      }
    }

    File excelFile = MetaFiles.createTempFile("Data", ".xls").toFile();
    FileOutputStream out = new FileOutputStream(excelFile);
    workBook.write(out);
    out.close();

    return metaFiles.upload(excelFile);
  }
 

public static List<String> writeExcelHeader(XSSFWorkbook wb, XSSFSheet sheet) {
    try {
        List<String> columns = externalNames();
        sheet.setDefaultColumnWidth(20);
        XSSFRow titleRow = sheet.createRow(0);
        XSSFCellStyle horizontalCenter = wb.createCellStyle();
        horizontalCenter.setAlignment(HorizontalAlignment.CENTER);
        for (int i = 0;
                i < columns.size();
                i++) {
            XSSFCell cell = titleRow.createCell(i);
            cell.setCellValue(columns.get(i));
            cell.setCellStyle(horizontalCenter);
        }
        return columns;
    } catch (Exception e) {
        return null;
    }
}
 

@Override
protected void printHeader(List<String> header, ByteArrayOutputStream out) {
	wb = new XSSFWorkbook();
       sheet = wb.createSheet("NextReports");

       XSSFRow headerRow = sheet.createRow(0);
       int col = 0;        
	if (header != null) {
		for (String s : header) {
			XSSFCell cell = headerRow.createCell(col);
			cell.setCellType(XSSFCell.CELL_TYPE_STRING);
			if (s == null) {
				s = "";
			}
			cell.setCellValue(wb.getCreationHelper().createRichTextString(s));
			col++;
		}
	}		
}
 

@Before
public void testXLS1() throws IOException {
       try (XSSFWorkbook workbook = new XSSFWorkbook()) {
        XSSFSheet sheet = workbook.createSheet();
        XSSFRow row = null;
        XSSFCell cell = null;
        row = sheet.createRow(0);
        cell = row.createCell(0);
		cell.setCellValue("A");
		cell = row.createCell(1);
		cell.setCellValue("B");
		cell = row.createCell(2);
		cell.setCellValue("C");
		
		insert(1,sheet,row,cell,1,2,3);
		insert(2,sheet,row,cell,4,5,6);
		insert(3,sheet,row,cell,4,5,6);
		insert(4,sheet,row,cell,1,2,3);
		insert(5,sheet,row,cell,7,8,9);
		insert(6,sheet,row,cell,7,8,9);
		insert(7,sheet,row,cell,4,5,6);
        
		try (FileOutputStream out = new FileOutputStream(file)) {
		    workbook.write(out);
		} catch (IOException e) {
			e.printStackTrace();
		}
       }

	String src = 
			"BEGIN;\n" +
					"var myvar external xls \"" + file.getAbsolutePath() + "\" dup_count;" +
			"END;\n" +
			"true";
	testEquals("true", src);
}
 

/**
 * poi导出，没用easypoi
 * 不要用swagger测试导出功能，下载的文件异常
 * 直接在浏览器访问http://localhost:8080/swagger-ui.html
 * 火狐浏览器可能出现文件名乱码，谷歌浏览器正常
 * @param response
 * @throws Exception
 */
@ApiOperation("导出excel")
@GetMapping("excel/export")
public void exportExcel(HttpServletResponse response) throws Exception{

    XSSFWorkbook workbook = new XSSFWorkbook();
    XSSFSheet sheet = workbook.createSheet();

    try {
        //表头
        XSSFRow r0 = sheet.createRow(0);
        XSSFCell c00 = r0.createCell(0);
        c00.setCellValue("列1");
        XSSFCell c01 = r0.createCell(1);
        c01.setCellValue("列2");

        //数据
        XSSFRow r1 = sheet.createRow(1);
        XSSFCell c10 = r1.createCell(0);
        c10.setCellValue("数据1");
        XSSFCell c11 = r1.createCell(1);
        c11.setCellValue("数据2");

        response.reset();

        // 告诉浏览器用什么软件可以打开此文件
        response.setHeader("content-Type", "application/vnd.ms-excel");
        // 下载文件的默认名称
        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode("测试.xlsx", "utf-8"));

        //将文件输出
        workbook.write(response.getOutputStream());
    } catch (Exception e) {
        log.error("导出excel错误{}", e.getMessage());
        e.printStackTrace();
    } finally {
        workbook.close();
    }
}
 

private XSSFCell getOrCreatePoiCell(int rowNum, int col) {
    XSSFRow row = getOrCreatePoiRow(rowNum);
    XSSFCell cell = row.getCell(col);
    if (cell == null) {
        cell = row.createCell(col);
    }
    return cell;
}
 

@Before
public void testXLS1() throws IOException {
       try (XSSFWorkbook workbook = new XSSFWorkbook()) {
        XSSFSheet sheet = workbook.createSheet();
        XSSFRow row = null;
        XSSFCell cell = null;
        row = sheet.createRow(0);
        cell = row.createCell(0);
		cell.setCellValue("A");
		cell = row.createCell(1);
		cell.setCellValue("B");
		cell = row.createCell(2);
		cell.setCellValue("C");
		
		insert(1,sheet,row,cell,1,2,3);
		insert(2,sheet,row,cell,4,5,6);
		insert(3,sheet,row,cell,4,5,6);
		insert(4,sheet,row,cell,1,2,3);
		insert(5,sheet,row,cell,7,8,9);
		insert(6,sheet,row,cell,7,8,9);
		insert(7,sheet,row,cell,4,5,6);
        
		try (FileOutputStream out = new FileOutputStream(file)) {
		    workbook.write(out);
		} catch (IOException e) {
			e.printStackTrace();
		}
       }

	String src = 
			"BEGIN;\n" +
					"var myvar external xls \"" + file.getAbsolutePath() + "\" dup_remove;" +
			"END;\n" +
			"true";
	testEquals("true", src);
}
 

private static void insert(int rowNum, XSSFSheet sheet, XSSFRow row, XSSFCell cell, int arg0, int arg1, int arg2) {
	row = sheet.createRow(rowNum);
       cell = row.createCell(0);
	cell.setCellValue(arg0);
	cell = row.createCell(1);
	cell.setCellValue(arg1);
	cell = row.createCell(2);
	cell.setCellValue(arg2);
}
 

private static void insert(int rowNum, XSSFSheet sheet, XSSFRow row, XSSFCell cell, int arg0, int arg1, int arg2) {
	row = sheet.createRow(rowNum);
       cell = row.createCell(0);
	cell.setCellValue(arg0);
	cell = row.createCell(1);
	cell.setCellValue(arg1);
	cell = row.createCell(2);
	cell.setCellValue(arg2);
}
 

@Before
public void testXLS1() throws IOException {
       try (XSSFWorkbook workbook = new XSSFWorkbook()) {
        XSSFSheet sheet = workbook.createSheet();
        XSSFRow row = null;
        XSSFCell cell = null;
        row = sheet.createRow(0);
        cell = row.createCell(0);
		cell.setCellValue("A");
		cell = row.createCell(1);
		cell.setCellValue("B");
		cell = row.createCell(2);
		cell.setCellValue("C");
		
		insert(1,sheet,row,cell,1,2,3);
		insert(2,sheet,row,cell,4,5,6);
		insert(3,sheet,row,cell,7,8,9);
        
		try (FileOutputStream out = new FileOutputStream(file)) {
		    workbook.write(out);
		} catch (IOException e) {
			e.printStackTrace();
		}
       }

	String src = 
			"BEGIN;\n" +
					"var myvar external xls \"" + file.getAbsolutePath() + "\";" +
			"END;\n" +
			"true";
	testEquals("true", src);
}
 

private static void insert(int rowNum, XSSFSheet sheet, XSSFRow row, XSSFCell cell, int arg0, int arg1, int arg2) {
	row = sheet.createRow(rowNum);
       cell = row.createCell(0);
	cell.setCellValue(arg0);
	cell = row.createCell(1);
	cell.setCellValue(arg1);
	cell = row.createCell(2);
	cell.setCellValue(arg2);
}
 

private void writeRow(XSSFSheet sheet, String[] values) {

    XSSFRow row = sheet.createRow(sheet.getPhysicalNumberOfRows());

    for (int i = 0; i < values.length; i++) {
      XSSFCell cell = row.createCell(i);
      cell.setCellValue(values[i]);
    }
  }
 

@Override
protected void startSerialize( RootNode rootNode, OutputStream outputStream ) throws Exception
{
    workbook = new XSSFWorkbook();
    sheet = workbook.createSheet( "Sheet1" );

    XSSFFont boldFont = workbook.createFont();
    boldFont.setBold( true );

    XSSFCellStyle boldCellStyle = workbook.createCellStyle();
    boldCellStyle.setFont( boldFont );

    // build schema
    for ( Node child : rootNode.getChildren() )
    {
        if ( child.isCollection() )
        {
            if ( !child.getChildren().isEmpty() )
            {
                Node node = child.getChildren().get( 0 );

                XSSFRow row = sheet.createRow( 0 );

                int cellIdx = 0;

                for ( Node property : node.getChildren() )
                {
                    if ( property.isSimple() )
                    {
                        XSSFCell cell = row.createCell( cellIdx++ );
                        cell.setCellValue( property.getName() );
                        cell.setCellStyle( boldCellStyle );
                    }
                }
            }
        }
    }
}
 

/**
 * @param source
 *            the sheet to copy.
 * @param destSheet
 *            the sheet to create.
 * @param srcRow
 *            the row to copy.
 * @param destRow
 *            the row to create.
 * @param styleMap
 *
 */
private static void copyRow(HSSFSheet source, XSSFSheet destSheet, HSSFRow srcRow, XSSFRow destRow, List<CellStyle> styleMap) {

	Set<CellRangeAddressWrapper> mergedRegions = new TreeSet<CellRangeAddressWrapper>();
	short dh = source.getDefaultRowHeight();
	if (srcRow.getHeight() != dh) {
		destRow.setHeight(srcRow.getHeight());
	}
	int j = srcRow.getFirstCellNum();
	if (j < 0) {
		j = 0;
	}
	for (; j <= srcRow.getLastCellNum(); j++) {
		HSSFCell oldCell = srcRow.getCell(j);
		XSSFCell newCell = destRow.getCell(j);
		if (oldCell != null) {
			if (newCell == null) {
				newCell = destRow.createCell(j);
			}
			copyCell(oldCell, newCell, styleMap);
			CellRangeAddress mergedRegion = getMergedRegion(source, srcRow.getRowNum(), (short) oldCell.getColumnIndex());

			if (mergedRegion != null) {

				CellRangeAddress newMergedRegion = new CellRangeAddress(mergedRegion.getFirstRow(), mergedRegion.getLastRow(),
						mergedRegion.getFirstColumn(), mergedRegion.getLastColumn());

				CellRangeAddressWrapper wrapper = new CellRangeAddressWrapper(newMergedRegion);
				if (isNewMergedRegion(wrapper, mergedRegions)) {
					mergedRegions.add(wrapper);
					destSheet.addMergedRegion(wrapper.range);
				}
			}
		}
	}

}
 

public static void writeXLSXFile() throws Exception {

		XSSFWorkbook xssfwb = new XSSFWorkbook();
		XSSFSheet sheet = xssfwb.createSheet(sheetName);
		for (int row = 0; row < tableData.size(); row++) {
			XSSFRow xddfrow = sheet.createRow(row);
			rowData = tableData.get(row);
			for (int col = 0; col < rowData.size(); col++) {
				XSSFCell cell = xddfrow.createCell(col);
				cell.setCellValue(rowData.get(col));
				logger.info("Writing " + row + " " + col + "  " + rowData.get(col));
			}
		}

		try (OutputStream fileOutputStream = new FileOutputStream(
				excelFileName)) {

			xssfwb.write(fileOutputStream);
			xssfwb.close();
			fileOutputStream.flush();
			fileOutputStream.close();

		} catch (IOException e) {
			String message = String.format("Exception saving XLSX file %s\n",
					excelFileName) + e.getMessage();
			logger.info(message);
			// NOTE: throw exceptions with user friendly messages to be rendered
			// by the master app
			throw new Exception(message);

		}
	}
 

/**
 * 导出Excel的例子
 * 因为类上面注解是@Controller，此方法需要@ResponseBody注解；如果类是RestController，则不需要ResponseBody
 * @return
 * @throws Exception
 */
@ResponseBody
@GetMapping("/export")
public ResponseEntity<byte[]> exportExcel() throws Exception{
    logger.trace("exportExcel");
    HttpHeaders responseHeaders = new HttpHeaders();
    responseHeaders.setContentDispositionFormData("attachment",new String("导出的文件名.xlsx".getBytes(), "ISO8859-1"));
    responseHeaders.setContentType(MediaType.APPLICATION_OCTET_STREAM);

    //中文文件名需要用iso8859-1编码
    InputStream templateIs = this.getClass().getResourceAsStream("/excel-templates/templet.xlsx");
    XSSFWorkbook workbook = new XSSFWorkbook(templateIs);
    XSSFSheet sheet = workbook.getSheetAt(0);

    List<SampleItem> list = getDataList();

    CellStyle cellStyle = workbook.createCellStyle();
    CreationHelper createHelper = workbook.getCreationHelper();
    cellStyle.setDataFormat(createHelper.createDataFormat().getFormat("yyyy/mm/dd"));

    for (int i=0; i<list.size(); i++) {
        SampleItem si = list.get(i);

        XSSFRow row = sheet.createRow(i + 1);

        Cell cell1 = row.createCell(0);
        cell1.setCellValue(si.getDate());
        cell1.setCellStyle(cellStyle);

        Cell cell2 = row.createCell(1);
        cell2.setCellValue(si.getName());

        Cell cell3 = row.createCell(2);
        cell3.setCellValue(si.getScore());
    }

    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    workbook.write(bos);
    workbook.close();
    return new ResponseEntity<byte[]>(bos.toByteArray(), responseHeaders, HttpStatus.OK);
}
 

public static void writeExcel(XSSFSheet sheet, int i, GeographyCode code) {
    try {
        List<String> row = values(code);
        XSSFRow sheetRow = sheet.createRow(i + 1);
        for (int j = 0;
                j < row.size();
                j++) {
            XSSFCell cell = sheetRow.createCell(j);
            cell.setCellValue(row.get(j));
        }
    } catch (Exception e) {
    }
}
 

public static void writeExcel(XSSFSheet sheet, int i, EpidemicReport report, List<String> extraFields) {
    try {
        List<String> row = values(report, extraFields);
        XSSFRow sheetRow = sheet.createRow(i + 1);
        for (int j = 0; j < row.size(); j++) {
            XSSFCell cell = sheetRow.createCell(j);
            cell.setCellValue(row.get(j));
        }
    } catch (Exception e) {
    }
}
 

protected boolean writeExcel(File file, String sql) {
    try ( Connection conn = DriverManager.getConnection(protocol + dbHome() + login);
             FileWriter writer = new FileWriter(file, Charset.forName("utf-8"))) {
        String filename = file.getAbsolutePath();
        conn.setReadOnly(true);
        XSSFWorkbook wb = new XSSFWorkbook();
        XSSFSheet sheet = wb.createSheet("sheet1");
        List<String> columns = columnNames();
        XSSFRow titleRow = sheet.createRow(0);
        XSSFCellStyle horizontalCenter = wb.createCellStyle();
        horizontalCenter.setAlignment(HorizontalAlignment.CENTER);
        for (int i = 0; i < columns.size(); i++) {
            XSSFCell cell = titleRow.createCell(i);
            cell.setCellValue(columns.get(i));
            cell.setCellStyle(horizontalCenter);
        }
        int count = 0;
        try ( ResultSet results = conn.createStatement().executeQuery(sql)) {
            while (results.next()) {
                if (cancelled) {
                    updateLogs(message("Cancelled") + " " + filename);
                    return false;
                }
                writeExcel(conn, sheet, results, count);
                count++;
                if (verboseCheck.isSelected() && (count % 50 == 0)) {
                    updateLogs(message("Exported") + " " + count + ": " + filename);
                }
            }
        }
        for (int i = 0; i < columns.size(); i++) {
            sheet.autoSizeColumn(i);
        }
        try ( OutputStream fileOut = new FileOutputStream(file)) {
            wb.write(fileOut);
        }
        return true;
    } catch (Exception e) {
        updateLogs(e.toString());
        return false;
    }
}