POI一键导入Excel数据到数据库

Apache POI是Apache软件基金会的开放源码函式库，POI提供API给Java程序对Microsoft Office格式档案读和写的功能。

这里，Excel表头去掉了，从每个sheet页的第二行开始读取。

读取所有的内容保存到LIst集合。

/**
 * 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数据内容
     * @param url Excel表格的路径
     * @return List<Map<Integer, String>> 包含单元格数据内容的List对象
     * @throws FileNotFoundException 
     */
    public List<Map<Integer, String>> readExcelContent(String url) throws FileNotFoundException {
    	List<Map<Integer,String>> contentList=new ArrayList<Map<Integer,String>>();
    	InputStream is=new FileInputStream(url);
        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 = 0; i <= rowNum; i++) {
        	Map<Integer, String> content = new HashMap<Integer, String>();
            row = sheet.getRow(i);
            int j = 0;
            while (j < colNum) {
                str = getCellFormatValue(row.getCell((short) j)).trim();
                //Excel每一行放到Map中
                content.put(j, str);
                j++;
            }
            //放到List集合
            contentList.add(content);
        }
        return contentList;
    }

    /**
     * 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;
    }

    /**
     * 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;
    }
}

这里丢出Main测试方法：

public class Test {
	public static void main(String[] args) {
		try {
			String url="jdbc:oracle:thin:@localhost:1521:orcl"; 
			Class.forName("oracle.jdbc.driver.OracleDriver");
			Connection conn=DriverManager.getConnection(url,"system","system");
			//关闭事务的自动提交
			conn.setAutoCommit(false);
			ExcelReader excelReader = new ExcelReader();
			List<Map<Integer, String>> contentList = excelReader.readExcelContent("c:\\test.xls");
			System.out.println("获得Excel表格的内容:"+contentList.size());
			//获得Map的key的个数
			int cloumtCount=contentList.get(0).keySet().size();
			System.out.println(contentList.size());
			String sql="insert into test_content values(?,?,?,?)";
			PreparedStatement pstmt=conn.prepareStatement(sql);
			for (int i = 1; i < contentList.size(); i++) {
				for (int j = 1; j <= cloumtCount; j++) {
					pstmt.setObject(j, contentList.get(i).get(j-1));
				}
				pstmt.addBatch();
			}
			pstmt.executeBatch();
			conn.commit();
			pstmt.close();
			conn.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}