JXL實現Excel的Excel匯入匯出

JXL實現Excel的建立

JXL建立Excel檔案

/**
 * JXL建立Excel檔案
 * @author c
 *
 */
public class JxlExpExcel {


    public static void main(String[] args) {
        //用陣列儲存表頭
        String[] title = {"id","name","sex"};
        //建立Excel檔案
        File file = new File("jxl_test.xls");
        try
 
 {
            file.createNewFile();
            //建立工作簿
            WritableWorkbook workbook = Workbook.createWorkbook(file);
            WritableSheet sheet = workbook.createSheet("sheet1", 0);

            Label label = null;

            //第一行設定列名
            for(int i = 0; i<title.length; i++){
                label = new
 
 Label(i, 0, title[i]);
                sheet.addCell(label);
            }

            //追加資料
            for(int i = 1; i<=10; i++){
                label = new Label(0, i, "a"+i);
                sheet.addCell(label);
                label = new Label(1, i, "user"+i);
                sheet.addCell(label);
                label = new
 
 Label(2, i, "男");
                sheet.addCell(label);
            }
            //寫入資料
            workbook.write();

            workbook.close();

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }


}

執行後可以在工程目錄下檢視到jxl_test.xls檔案
開啟檢視內容：

JXL實現Excel的解析

JXL解析Excel

/**
 * JXL解析Excel
 * @author c
 *
 */
public class JxlReadExcel {

    public static void main(String[] args) {
        try {
            //建立workbook
            Workbook workbook = Workbook.getWorkbook(new File("jxl_test.xls"));
            //獲取第一個工作表sheet
            Sheet sheet = workbook.getSheet(0);

            //獲取資料
            for (int i = 0; i < sheet.getRows(); i++) {
                for (int j = 0; j < sheet.getColumns(); j++) {
                    Cell cell = sheet.getCell(j,i);
                    System.out.println(cell.getContents());
                }
                System.out.println();
            }
            workbook.close();
        }catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

執行結果如下：

POI實現Excel的Excel匯入匯出

匯入jar包

POI實現Excel的建立

POI生成Excel檔案

/**
 * POI生成Excel檔案
 * @author c
 *
 */
public class PoiExpExcel {

    public static void main(String[] args) {

        //用陣列儲存表頭
        String[] title = {"id","name","sex"};

        //建立Excel工作簿
        HSSFWorkbook workbook = new HSSFWorkbook();
        //建立一個工作表sheet
        HSSFSheet sheet = workbook.createSheet();
        //建立第一行
        HSSFRow row = sheet.createRow(0);
        HSSFCell cell = null;
        //插入第一行資料
        for (int i = 0; i < title.length; i++) {
            cell = row.createCell(i);
            cell.setCellValue(title[i]);
        }

        //追加資料
        for (int i = 1; i <= 10; i++) {
            HSSFRow nextRow = sheet.createRow(i);
            HSSFCell cell2 = nextRow.createCell(0);
            cell2.setCellValue("a" + i);
            cell2 = nextRow.createCell(1);
            cell2.setCellValue("user" + i);
            cell2 = nextRow.createCell(2);
            cell2.setCellValue("男");
        }

        File file = new File("poi_test.xls");
        try {
            file.createNewFile();
            //將excel存檔
            FileOutputStream stream = FileUtils.openOutputStream(file);
            workbook.write(stream);
            stream.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}

執行後可以在工程目錄下檢視到poi_test.xls檔案
檢視裡面的內容：

POI實現Excel的解析

POI解析檔案內容

/**
 * POI解析檔案內容
 * @author c
 *
 */
public class PoiReadExcel {

    public static void main(String[] args) {

        //需要解析的Excel檔案
        File file = new File("poi_test.xls");
        try {
            //建立Excel,讀取檔案內容
            HSSFWorkbook workbook = new HSSFWorkbook(FileUtils.openInputStream(file));
            //獲取第一個工作表
        //  HSSFSheet sheet = workbook.getSheet("Sheet0");
            //讀取預設第一個工作表sheet
            HSSFSheet sheet = workbook.getSheetAt(0);

            int firstRowNum = 0;
            //獲取sheet中最後一行行號
            int lastRowNum = sheet.getLastRowNum();
            for (int i = 0; i < lastRowNum; i++) {
                HSSFRow row = sheet.getRow(i);
                //獲取當前行最後單元格列號
                int lastCellNum = row.getLastCellNum();
                for (int j = 0; j < lastCellNum; j++) {
                    HSSFCell cell = row.getCell(j);
                    String value = cell.getStringCellValue();
                    System.out.println(value+" ");
                }
                System.out.println();
            }

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}

執行結果如下：