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2016-08-30 07:28 阅读 1.5k

用poi导入excel的xls和xlsx文件

用java代码编程,用poi导入excel的xls和xlsx文件

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  • new_culture new_culture 2016-08-30 07:31

    xls和xlsx是新旧版本 你用哪个

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  • qq_31308417 qq_31308417 2016-08-30 07:44

    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.ArrayList;
    import java.util.List;

    import org.apache.poi.hssf.usermodel.HSSFCell;
    import org.apache.poi.hssf.usermodel.HSSFRow;
    import org.apache.poi.hssf.usermodel.HSSFSheet;
    import org.apache.poi.hssf.usermodel.HSSFWorkbook;

    /**

    • @author Hongten
    • 参考地址:http://hao0610.iteye.com/blog/1160678
    • */
      public class XlsMain {

      public static void main(String[] args) throws IOException {
      XlsMain xlsMain = new XlsMain();
      XlsDto xls = null;
      List list = xlsMain.readXls();

      try {
          XlsDto2Excel.xlsDto2Excel(list);
      } catch (Exception e) {
          e.printStackTrace();
      }
      for (int i = 0; i < list.size(); i++) {
          xls = (XlsDto) list.get(i);
          System.out.println(xls.getXh() + "    " + xls.getXm() + "    "
                  + xls.getYxsmc() + "    " + xls.getKcm() + "    "
                  + xls.getCj());
      }
      

      }

      /**

      • 读取xls文件内容
      • @return List对象
      • @throws IOException
      • 输入/输出(i/o)异常 */ private List readXls() throws IOException { InputStream is = new FileInputStream("pldrxkxxmb.xls"); HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is); XlsDto xlsDto = null; List list = new ArrayList(); // 循环工作表Sheet for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) { HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet); if (hssfSheet == null) { continue; } // 循环行Row for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) { HSSFRow hssfRow = hssfSheet.getRow(rowNum); if (hssfRow == null) { continue; } xlsDto = new XlsDto(); // 循环列Cell // 0学号 1姓名 2学院 3课程名 4 成绩 // for (int cellNum = 0; cellNum <=4; cellNum++) { HSSFCell xh = hssfRow.getCell(0); if (xh == null) { continue; } xlsDto.setXh(getValue(xh)); HSSFCell xm = hssfRow.getCell(1); if (xm == null) { continue; } xlsDto.setXm(getValue(xm)); HSSFCell yxsmc = hssfRow.getCell(2); if (yxsmc == null) { continue; } xlsDto.setYxsmc(getValue(yxsmc)); HSSFCell kcm = hssfRow.getCell(3); if (kcm == null) { continue; } xlsDto.setKcm(getValue(kcm)); HSSFCell cj = hssfRow.getCell(4); if (cj == null) { continue; } xlsDto.setCj(Float.parseFloat(getValue(cj))); list.add(xlsDto); } } return list; }

      /**

      • 得到Excel表中的值
      • @param hssfCell
      • Excel中的每一个格子
      • @return Excel中每一个格子中的值 */ @SuppressWarnings("static-access") private String getValue(HSSFCell hssfCell) { if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) { // 返回布尔类型的值 return String.valueOf(hssfCell.getBooleanCellValue()); } else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) { // 返回数值类型的值 return String.valueOf(hssfCell.getNumericCellValue()); } else { // 返回字符串类型的值 return String.valueOf(hssfCell.getStringCellValue()); } }

    }

    XlsDto2Excel.java类

    //该类主要负责向Excel(2003版)中插入数据
    import java.io.FileOutputStream;
    import java.io.OutputStream;
    import java.util.List;

    import org.apache.poi.hssf.usermodel.HSSFCell;
    import org.apache.poi.hssf.usermodel.HSSFRichTextString;
    import org.apache.poi.hssf.usermodel.HSSFRow;
    import org.apache.poi.hssf.usermodel.HSSFSheet;
    import org.apache.poi.hssf.usermodel.HSSFWorkbook;

    public class XlsDto2Excel {

    /**
     * 
     * @param xls
     *            XlsDto实体类的一个对象
     * @throws Exception
     *             在导入Excel的过程中抛出异常
     */
    public static void xlsDto2Excel(List<XlsDto> xls) throws Exception {
        // 获取总列数
        int CountColumnNum = xls.size();
        // 创建Excel文档
        HSSFWorkbook hwb = new HSSFWorkbook();
        XlsDto xlsDto = null;
        // sheet 对应一个工作页
        HSSFSheet sheet = hwb.createSheet("pldrxkxxmb");
        HSSFRow firstrow = sheet.createRow(0); // 下标为0的行开始
        HSSFCell[] firstcell = new HSSFCell[CountColumnNum];
        String[] names = new String[CountColumnNum];
        names[0] = "学号";
        names[1] = "姓名";
        names[2] = "学院";
        names[3] = "课程名";
        names[4] = "成绩";
        for (int j = 0; j < CountColumnNum; j++) {
            firstcell[j] = firstrow.createCell(j);
            firstcell[j].setCellValue(new HSSFRichTextString(names[j]));
        }
        for (int i = 0; i < xls.size(); i++) {
            // 创建一行
            HSSFRow row = sheet.createRow(i + 1);
            // 得到要插入的每一条记录
            xlsDto = xls.get(i);
            for (int colu = 0; colu <= 4; colu++) {
                // 在一行内循环
                HSSFCell xh = row.createCell(0);
                xh.setCellValue(xlsDto.getXh());
                HSSFCell xm = row.createCell(1);
                xm.setCellValue(xlsDto.getXm());
                HSSFCell yxsmc = row.createCell(2);
                yxsmc.setCellValue(xlsDto.getYxsmc());
                HSSFCell kcm = row.createCell(3);
                kcm.setCellValue(xlsDto.getKcm());
                HSSFCell cj = row.createCell(4);
                cj.setCellValue(xlsDto.getCj());
    

    (xlsDto.getMessage());
    }
    }
    // 创建文件输出流,准备输出电子表格
    OutputStream out = new FileOutputStream("POI2Excel/pldrxkxxmb.xls");
    hwb.write(out);
    out.close();
    System.out.println("数据库导出成功");
    }

    }

    XlsDto .java类

    //该类是一个实体类
    public class XlsDto {
    /**
    * 选课号
    /
    private Integer xkh;
    /
    *
    * 学号
    /
    private String xh;
    /
    *
    * 姓名
    /
    private String xm;
    /
    *
    * 学院
    /
    private String yxsmc;
    /
    *
    * 课程号
    /
    private Integer kch;
    /
    *
    * 课程名
    /
    private String kcm;
    /
    *
    * 成绩
    */
    private float cj;
    public Integer getXkh() {
    return xkh;
    }
    public void setXkh(Integer xkh) {
    this.xkh = xkh;
    }
    public String getXh() {
    return xh;
    }
    public void setXh(String xh) {
    this.xh = xh;
    }
    public String getXm() {
    return xm;
    }
    public void setXm(String xm) {
    this.xm = xm;
    }
    public String getYxsmc() {
    return yxsmc;
    }
    public void setYxsmc(String yxsmc) {
    this.yxsmc = yxsmc;
    }
    public Integer getKch() {
    return kch;
    }
    public void setKch(Integer kch) {
    this.kch = kch;
    }
    public String getKcm() {
    return kcm;
    }
    public void setKcm(String kcm) {
    this.kcm = kcm;
    }
    public float getCj() {
    return cj;
    }
    public void setCj(float cj) {
    this.cj = cj;
    }

    }

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