POI学习笔记(二)

7.  设置单元格的边框

 

 public void createBorder() throws Exception {
         Workbook wb = new HSSFWorkbook();
         Sheet sheet = wb.createSheet("new sheet");

         // Create a row and put some cells in it. Rows are 0 based.
         Row row = sheet.createRow(1);

         // Create a cell and put a value in it.
         Cell cell = row.createCell(1);
         cell.setCellValue(4);

         // Style the cell with borders all around.
         CellStyle style = wb.createCellStyle();
         style.setBorderBottom(CellStyle.BORDER_THIN);
         style.setBottomBorderColor(IndexedColors.BLACK.getIndex());
         style.setBorderLeft(CellStyle.BORDER_THIN);
         style.setLeftBorderColor(IndexedColors.GREEN.getIndex());
         style.setBorderRight(CellStyle.BORDER_THIN);
         style.setRightBorderColor(IndexedColors.BLUE.getIndex());
         style.setBorderTop(CellStyle.BORDER_MEDIUM_DASHED);
         style.setTopBorderColor(IndexedColors.BLACK.getIndex());
         cell.setCellStyle(style);

         // Write the output to a file
         FileOutputStream fileOut = new FileOutputStream("workbook.xls");
         wb.write(fileOut);
         fileOut.close();

     }

<SPAN style="FONT-SIZE: medium">public void createBorder() throws Exception {
         Workbook wb = new HSSFWorkbook();
         Sheet sheet = wb.createSheet("new sheet");

         // Create a row and put some cells in it. Rows are 0 based.
         Row row = sheet.createRow(1);

         // Create a cell and put a value in it.
         Cell cell = row.createCell(1);
         cell.setCellValue(4);

         // Style the cell with borders all around.
        CellStyle style = wb.createCellStyle();
        style.setBorderBottom(CellStyle.BORDER_THIN);
        style.setBottomBorderColor(IndexedColors.BLACK.getIndex());
        style.setBorderLeft(CellStyle.BORDER_THIN);
        style.setLeftBorderColor(IndexedColors.GREEN.getIndex());
        style.setBorderRight(CellStyle.BORDER_THIN);
        style.setRightBorderColor(IndexedColors.BLUE.getIndex());
        style.setBorderTop(CellStyle.BORDER_MEDIUM_DASHED);
        style.setTopBorderColor(IndexedColors.BLACK.getIndex());
        cell.setCellStyle(style);

         // Write the output to a file
         FileOutputStream fileOut = new FileOutputStream("workbook.xls");
        wb.write(fileOut);
        fileOut.close();

    }</SPAN>

public void createBorder() throws Exception { Workbook wb = new HSSFWorkbook(); Sheet sheet = wb.createSheet("new sheet"); // Create a row and put some cells in it. Rows are 0 based. Row row = sheet.createRow(1); // Create a cell and put a value in it. Cell cell = row.createCell(1); cell.setCellValue(4); // Style the cell with borders all around. CellStyle style = wb.createCellStyle(); style.setBorderBottom(CellStyle.BORDER_THIN); style.setBottomBorderColor(IndexedColors.BLACK.getIndex()); style.setBorderLeft(CellStyle.BORDER_THIN); style.setLeftBorderColor(IndexedColors.GREEN.getIndex()); style.setBorderRight(CellStyle.BORDER_THIN); style.setRightBorderColor(IndexedColors.BLUE.getIndex()); style.setBorderTop(CellStyle.BORDER_MEDIUM_DASHED); style.setTopBorderColor(IndexedColors.BLACK.getIndex()); cell.setCellStyle(style); // Write the output to a file FileOutputStream fileOut = new FileOutputStream("workbook.xls"); wb.write(fileOut); fileOut.close(); }

 

8. 迭代行和单元格

 

    有时需要迭代一个页中的所有行，或者一个行中所有的单元格。一个简单的方法是循环。

    幸运的是，poi知道我们所需。页可以通过sheet.rowIterator()迭代出所有的行，行可以通过row.cellIterator()迭代出所有的单元格。总之，Sheet和Row实现了java.lang.Iterable，如果你用的是jdk1.5以上的版本，你可以使用java高级for循环。

 

 Sheet sheet = wb.getSheetAt(0);
     for (Iterator rit = sheet.rowIterator(); rit.hasNext(); ) {
         Row row = (Row)rit.next();
         for (Iterator cit = row.cellIterator(); cit.hasNext(); ) {
             Cell cell = (Cell)cit.next();
             // Do something here
         }
     }
                     HSSFSheet sheet = wb.getSheetAt(0);
     for (Iterator<HSSFRow> rit = (Iterator<HSSFRow>)sheet.rowIterator(); rit.hasNext(); ) {
         HSSFRow row = rit.next();
         for (Iterator<HSSFCell> cit = (Iterator<HSSFCell>)row.cellIterator(); cit.hasNext(); ) {
             HSSFCell cell = cit.next();
             // Do something here
         }
     }

<SPAN style="FONT-SIZE: medium">Sheet sheet = wb.getSheetAt(0);
     for (Iterator rit = sheet.rowIterator(); rit.hasNext(); ) {
        Row row = (Row)rit.next();
         for (Iterator cit = row.cellIterator(); cit.hasNext(); ) {
            Cell cell = (Cell)cit.next();
             // Do something here
        }
    }
                     HSSFSheet sheet = wb.getSheetAt(0);
     for (Iterator<HSSFRow> rit = (Iterator<HSSFRow>)sheet.rowIterator(); rit.hasNext(); ) {
        HSSFRow row = rit.next();
         for (Iterator<HSSFCell> cit = (Iterator<HSSFCell>)row.cellIterator(); cit.hasNext(); ) {
            HSSFCell cell = cit.next();
             // Do something here
        }
    }
</SPAN>

Sheet sheet = wb.getSheetAt(0); for (Iterator rit = sheet.rowIterator(); rit.hasNext(); ) { Row row = (Row)rit.next(); for (Iterator cit = row.cellIterator(); cit.hasNext(); ) { Cell cell = (Cell)cit.next(); // Do something here } } HSSFSheet sheet = wb.getSheetAt(0); for (Iterator<HSSFRow> rit = (Iterator<HSSFRow>)sheet.rowIterator(); rit.hasNext(); ) { HSSFRow row = rit.next(); for (Iterator<HSSFCell> cit = (Iterator<HSSFCell>)row.cellIterator(); cit.hasNext(); ) { HSSFCell cell = cit.next(); // Do something here } } 

 

java高级for循环迭代行和单元格

 

 Sheet sheet = wb.getSheetAt(0);
     for (Row row : sheet) {
         for (Cell cell : row) {
             // Do something here
         }
     }

<SPAN style="FONT-SIZE: medium">Sheet sheet = wb.getSheetAt(0);
     for (Row row : sheet) {
         for (Cell cell : row) {
             // Do something here
        }
    }
</SPAN>

Sheet sheet = wb.getSheetAt(0); for (Row row : sheet) { for (Cell cell : row) { // Do something here } } 

 

9.  得到单元格的内容

 

     想得到单元格的内容之前，首先要知道单元格的类型，因此你要先判断单元格的类型之后选择合适的方法得到单元格的值。下面的代码，循环得到一个Sheet所有的单元格。

 

 public void getCellValue() throws Exception {
         InputStream inp = new FileInputStream("D:\\hjn.xls");
         HSSFWorkbook wb = new HSSFWorkbook(new POIFSFileSystem(inp));
         Sheet sheet1 = wb.getSheetAt(0);
         for (Row row : sheet1) {
             for (Cell cell : row) {
                 CellReference cellRef = new CellReference(row.getRowNum(), cell
                         .getColumnIndex());
                 System.out.print(cellRef.formatAsString());
                 System.out.print(" - ");

                 switch (cell.getCellType()) {
                 case Cell.CELL_TYPE_STRING:
                     System.out.println(cell.getRichStringCellValue()
                             .getString());
                     break;
                 case Cell.CELL_TYPE_NUMERIC:
                     if (DateUtil.isCellDateFormatted(cell)) {
                         System.out.println(cell.getDateCellValue());
                     } else {
                         System.out.println(cell.getNumericCellValue());
                     }
                     break;
                 case Cell.CELL_TYPE_BOOLEAN:
                     System.out.println(cell.getBooleanCellValue());
                     break;
                 case Cell.CELL_TYPE_FORMULA:
                     System.out.println(cell.getCellFormula());
                     break;
                 default:
                     System.out.println();
                 }
             }
         }

     }

<SPAN style="FONT-SIZE: medium">public void getCellValue() throws Exception {
         InputStream inp = new FileInputStream("D:\\hjn.xls");
         HSSFWorkbook wb = new HSSFWorkbook(new POIFSFileSystem(inp));
         Sheet sheet1 = wb.getSheetAt(0);
         for (Row row : sheet1) {
             for (Cell cell : row) {
                 CellReference cellRef = new CellReference(row.getRowNum(), cell
                        .getColumnIndex());
                System.out.print(cellRef.formatAsString());
                 System.out.print(" - ");

                 switch (cell.getCellType()) {
                 case Cell.CELL_TYPE_STRING:
                    System.out.println(cell.getRichStringCellValue()
                            .getString());
                     break;
                 case Cell.CELL_TYPE_NUMERIC:
                     if (DateUtil.isCellDateFormatted(cell)) {
                        System.out.println(cell.getDateCellValue());
                     } else {
                        System.out.println(cell.getNumericCellValue());
                    }
                     break;
                 case Cell.CELL_TYPE_BOOLEAN:
                    System.out.println(cell.getBooleanCellValue());
                     break;
                 case Cell.CELL_TYPE_FORMULA:
                    System.out.println(cell.getCellFormula());
                     break;
                 default:
                    System.out.println();
                }
            }
        }

    }</SPAN>

public void getCellValue() throws Exception { InputStream inp = new FileInputStream("D:\\hjn.xls"); HSSFWorkbook wb = new HSSFWorkbook(new POIFSFileSystem(inp)); Sheet sheet1 = wb.getSheetAt(0); for (Row row : sheet1) { for (Cell cell : row) { CellReference cellRef = new CellReference(row.getRowNum(), cell .getColumnIndex()); System.out.print(cellRef.formatAsString()); System.out.print(" - "); switch (cell.getCellType()) { case Cell.CELL_TYPE_STRING: System.out.println(cell.getRichStringCellValue() .getString()); break; case Cell.CELL_TYPE_NUMERIC: if (DateUtil.isCellDateFormatted(cell)) { System.out.println(cell.getDateCellValue()); } else { System.out.println(cell.getNumericCellValue()); } break; case Cell.CELL_TYPE_BOOLEAN: System.out.println(cell.getBooleanCellValue()); break; case Cell.CELL_TYPE_FORMULA: System.out.println(cell.getCellFormula()); break; default: System.out.println(); } } } }

 

10. 文本提取

 

poi的ExcelExtractor可以抽取Cell中的值。org.apache.poi.ss.extractor 为抽取类的接口，ExcelExtractor, XSSFExcelExtractor实现了该接口。

 

 InputStream inp = new FileInputStream("D:\\hjn.xls");
         HSSFWorkbook  wb = new HSSFWorkbook(new POIFSFileSystem(inp));

         ExcelExtractor extractor = new ExcelExtractor(wb);

         extractor.setFormulasNotResults(true);
         extractor.setIncludeSheetNames(true);
         String text = extractor.getText();
         System.out.println(text);

<SPAN style="FONT-SIZE: medium">InputStream inp = new FileInputStream("D:\\hjn.xls");
         HSSFWorkbook  wb = new HSSFWorkbook(new POIFSFileSystem(inp));

         ExcelExtractor extractor = new ExcelExtractor(wb);

         extractor.setFormulasNotResults(true);
         extractor.setIncludeSheetNames(true);
        String text = extractor.getText();
        System.out.println(text);</SPAN>

InputStream inp = new FileInputStream("D:\\hjn.xls"); HSSFWorkbook wb = new HSSFWorkbook(new POIFSFileSystem(inp)); ExcelExtractor extractor = new ExcelExtractor(wb); extractor.setFormulasNotResults(true); extractor.setIncludeSheetNames(true); String text = extractor.getText(); System.out.println(text);

 

 11. 填充和颜色

 

 public void fillAndColors() throws Exception{
         Workbook wb = new HSSFWorkbook();
         Sheet sheet = wb.createSheet("new sheet");

         // Create a row and put some cells in it. Rows are 0 based.
         Row row = sheet.createRow((short) 1);

         // Aqua background
         CellStyle style = wb.createCellStyle();
         style.setFillBackgroundColor(IndexedColors.BLUE.getIndex());
         style.setFillPattern(CellStyle.ALIGN_FILL);
         Cell cell = row.createCell((short) 1);
         cell.setCellValue("X");
         cell.setCellStyle(style);

         // Orange "foreground", foreground being the fill foreground not the font color.
         style = wb.createCellStyle();
         style.setFillForegroundColor(IndexedColors.ORANGE.getIndex());
         style.setFillPattern(CellStyle.SOLID_FOREGROUND);
         cell = row.createCell((short) 2);
         cell.setCellValue("X");
         cell.setCellStyle(style);

         // Write the output to a file
         FileOutputStream fileOut = new FileOutputStream("workbook.xls");
         wb.write(fileOut);
         fileOut.close();

     }

<SPAN style="FONT-SIZE: medium">public void fillAndColors() throws Exception{
         Workbook wb = new HSSFWorkbook();
         Sheet sheet = wb.createSheet("new sheet");

         // Create a row and put some cells in it. Rows are 0 based.
         Row row = sheet.createRow((short) 1);

         // Aqua background
        CellStyle style = wb.createCellStyle();
        style.setFillBackgroundColor(IndexedColors.BLUE.getIndex());
        style.setFillPattern(CellStyle.ALIGN_FILL);
         Cell cell = row.createCell((short) 1);
         cell.setCellValue("X");
        cell.setCellStyle(style);

         // Orange "foreground", foreground being the fill foreground not the font color.
        style = wb.createCellStyle();
        style.setFillForegroundColor(IndexedColors.ORANGE.getIndex());
        style.setFillPattern(CellStyle.SOLID_FOREGROUND);
         cell = row.createCell((short) 2);
         cell.setCellValue("X");
        cell.setCellStyle(style);

         // Write the output to a file
         FileOutputStream fileOut = new FileOutputStream("workbook.xls");
        wb.write(fileOut);
        fileOut.close();

    }</SPAN>

public void fillAndColors() throws Exception{ Workbook wb = new HSSFWorkbook(); Sheet sheet = wb.createSheet("new sheet"); // Create a row and put some cells in it. Rows are 0 based. Row row = sheet.createRow((short) 1); // Aqua background CellStyle style = wb.createCellStyle(); style.setFillBackgroundColor(IndexedColors.BLUE.getIndex()); style.setFillPattern(CellStyle.ALIGN_FILL); Cell cell = row.createCell((short) 1); cell.setCellValue("X"); cell.setCellStyle(style); // Orange "foreground", foreground being the fill foreground not the font color. style = wb.createCellStyle(); style.setFillForegroundColor(IndexedColors.ORANGE.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); cell = row.createCell((short) 2); cell.setCellValue("X"); cell.setCellStyle(style); // Write the output to a file FileOutputStream fileOut = new FileOutputStream("workbook.xls"); wb.write(fileOut); fileOut.close(); }

 

12. 合并单元格

 

 public void mergingCell() throws Exception{
         Workbook wb = new HSSFWorkbook();
         Sheet sheet = wb.createSheet("new sheet");
         Row row = sheet.createRow((short) 1);
         Cell cell = row.createCell((short) 1);
         cell.setCellValue("This is a test of merging");

         sheet.addMergedRegion(new CellRangeAddress(1, // first row (0-based)
                 4, // last row (0-based)
                 1, // first column (0-based)
                 6 // last column (0-based)
                 ));

         // Write the output to a file
         FileOutputStream fileOut = new FileOutputStream("workbook.xls");
         wb.write(fileOut);
         fileOut.close();

     }

<SPAN style="FONT-SIZE: medium">public void mergingCell() throws Exception{
         Workbook wb = new HSSFWorkbook();
         Sheet sheet = wb.createSheet("new sheet");
         Row row = sheet.createRow((short) 1);
         Cell cell = row.createCell((short) 1);
         cell.setCellValue("This is a test of merging");

         sheet.addMergedRegion(new CellRangeAddress(1, // first row (0-based)
                 4, // last row (0-based)
                 1, // first column (0-based)
                 6 // last column (0-based)
                ));

         /

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如何连接oracle数据库及故障解决办法 | POI学习笔记(一) 转载

• 2010-06-29 23:10
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