poi 解析xls表

今天药忘吃喽~ 2022-08-19 14:28 18阅读 0赞

需要jar包:

poi-3.8-20120326.jar

poi-ooxml-3.8-20120326.jar

poi-examples-3.8-20120326.jar

poi-ooxml-schemas-3.8-20120326.jar

如果是Maven

<dependency>  
<groupId>org.apache.poi</groupId>  
<artifactId>poi</artifactId>  
<version>3.8</version>  
</dependency>

如果导入的数据有数字类型需要在取值的时候单独做处理：

double cellValue = cell.getNumericCellValue();  
new DecimalFormat("\#").format(cellValue);

package jetf;
    
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.io.InputStream;
    import java.text.DecimalFormat;
    import java.text.SimpleDateFormat;
    import java.util.ArrayList;
    import java.util.Date;
    import java.util.HashMap;
    import java.util.Iterator;
    import java.util.List;
    import java.util.Map;
    
    
    import org.apache.poi.hssf.usermodel.HSSFCell;
    import org.apache.poi.hssf.usermodel.HSSFDateUtil;
    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.poifs.filesystem.POIFSFileSystem;
    
    import com.jetf.util.PatientUser;
    
    /**
     * 操作Excel表格的功能类
     */
    /**
     * 操作Excel表格的功能类
     */
    public class ExcelReader {
        private POIFSFileSystem fs;
        private HSSFWorkbook wb;
        private HSSFSheet sheet;
        private HSSFRow row;
    
        /**
         * 读取Excel表格表头的内容
         * @param InputStream
         * @return String 表头内容的数组
         */
        public String[] readExcelTitle(InputStream is) {
            try {
                fs = new POIFSFileSystem(is);
                wb = new HSSFWorkbook(fs);
            } catch (IOException e) {
                e.printStackTrace();
            }
            sheet = wb.getSheetAt(0);
            row = sheet.getRow(0);
            // 标题总列数
            int colNum = row.getPhysicalNumberOfCells();
            System.out.println("colNum:" + colNum);
            String[] title = new String[colNum];
            for (int i = 0; i < colNum; i++) {
                //title[i] = getStringCellValue(row.getCell((short) i));
                title[i] = getCellFormatValue(row.getCell((short) i));
            }
            return title;
        }
    
        /**
         * 读取Excel数据内容
         * @param InputStream
         * @return Map 包含单元格数据内容的Map对象
         */
        public Map<Integer, String> readExcelContent(InputStream is) {
            Map<Integer, String> content = new HashMap<Integer, String>();
            String str = "";
            try {
                fs = new POIFSFileSystem(is);
                wb = new HSSFWorkbook(fs);
            } catch (IOException e) {
                e.printStackTrace();
            }
            sheet = wb.getSheetAt(0);
            // 得到总行数
            int rowNum = sheet.getLastRowNum();
            row = sheet.getRow(0);
            int colNum = row.getPhysicalNumberOfCells();
            // 正文内容应该从第二行开始,第一行为表头的标题
            for (int i = 1; i <= rowNum; i++) {
                row = sheet.getRow(i);
                int j = 0;
                while (j < colNum) {
                    // 每个单元格的数据内容用"-"分割开，以后需要时用String类的replace()方法还原数据
                    // 也可以将每个单元格的数据设置到一个javabean的属性中，此时需要新建一个javabean
                    // str += getStringCellValue(row.getCell((short) j)).trim() +
                    // "-";
                    str += getCellFormatValue(row.getCell((short) j)).trim() + "    ";
                    j++;
                }
                content.put(i, str);
                str = "";
            }
            return content;
        }
    
        /**
         * 获取单元格数据内容为字符串类型的数据
         * 
         * @param cell Excel单元格
         * @return String 单元格数据内容
         */
        private String getStringCellValue(HSSFCell cell) {
            String strCell = "";
            switch (cell.getCellType()) {
            case HSSFCell.CELL_TYPE_STRING:
                strCell = cell.getStringCellValue();
                break;
            case HSSFCell.CELL_TYPE_NUMERIC:
                strCell = String.valueOf(cell.getNumericCellValue());
                break;
            case HSSFCell.CELL_TYPE_BOOLEAN:
                strCell = String.valueOf(cell.getBooleanCellValue());
                break;
            case HSSFCell.CELL_TYPE_BLANK:
                strCell = "";
                break;
            default:
                strCell = "";
                break;
            }
            if (strCell.equals("") || strCell == null) {
                return "";
            }
            if (cell == null) {
                return "";
            }
            return strCell;
        }
    
        /**
         * 获取单元格数据内容为日期类型的数据
         * 
         * @param cell
         *            Excel单元格
         * @return String 单元格数据内容
         */
        private String getDateCellValue(HSSFCell cell) {
            String result = "";
            try {
                int cellType = cell.getCellType();
                if (cellType == HSSFCell.CELL_TYPE_NUMERIC) {
                    Date date = cell.getDateCellValue();
                    result = (date.getYear() + 1900) + "-" + (date.getMonth() + 1)
                            + "-" + date.getDate();
                } else if (cellType == HSSFCell.CELL_TYPE_STRING) {
                    String date = getStringCellValue(cell);
                    result = date.replaceAll("[年月]", "-").replace("日", "").trim();
                } else if (cellType == HSSFCell.CELL_TYPE_BLANK) {
                    result = "";
                }
            } catch (Exception e) {
                System.out.println("日期格式不正确!");
                e.printStackTrace();
            }
            return result;
        }
    
        /**
         * 根据HSSFCell类型设置数据
         * @param cell
         * @return
         */
        private String getCellFormatValue(HSSFCell cell) {
            String cellvalue = "";
            if (cell != null) {
                // 判断当前Cell的Type
                switch (cell.getCellType()) {
                // 如果当前Cell的Type为NUMERIC
                case HSSFCell.CELL_TYPE_NUMERIC:
                case HSSFCell.CELL_TYPE_FORMULA: {
                    // 判断当前的cell是否为Date
                    if (HSSFDateUtil.isCellDateFormatted(cell)) {
                        // 如果是Date类型则，转化为Data格式
                        
                        //方法1：这样子的data格式是带时分秒的：2011-10-12 0:00:00
                        //cellvalue = cell.getDateCellValue().toLocaleString();
                        
                        //方法2：这样子的data格式是不带带时分秒的：2011-10-12
                        Date date = cell.getDateCellValue();
                        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
                        cellvalue = sdf.format(date);
                        
                    }
                    // 如果是纯数字
                    else {
                        // 取得当前Cell的数值
                        cellvalue = String.valueOf(cell.getNumericCellValue());
                    }
                    break;
                }
                // 如果当前Cell的Type为STRIN
                case HSSFCell.CELL_TYPE_STRING:
                    // 取得当前的Cell字符串
                    cellvalue = cell.getRichStringCellValue().getString();
                    break;
                // 默认的Cell值
                default:
                    cellvalue = " ";
                }
            } else {
                cellvalue = "";
            }
            return cellvalue;
    
        }
    
        public static void main(String[] args) {
            try {
                // 对读取Excel表格标题测试
                InputStream is = new FileInputStream("d:\\test2.xls");
                ExcelReader excelReader = new ExcelReader();
                String[] title = excelReader.readExcelTitle(is);
                System.out.println("获得Excel表格的标题:");
                for (String s : title) {
                    System.out.print(s + " ");
                }
    
                // 对读取Excel表格内容测试
                InputStream is2 = new FileInputStream("d:\\test2.xls");
                Map<Integer, String> map = excelReader.readExcelContent(is2);
                System.out.println("获得Excel表格的内容:");
                for (int i = 1; i <= map.size(); i++) {
                    System.out.println(map.get(i));
                }
    
            } catch (FileNotFoundException e) {
                System.out.println("未找到指定路径的文件!");
                e.printStackTrace();
            }
        }
    }