java读取excle的数据存入数据库

java读取excle的数据存入数据库

1.附上前端代码jsp页面

	$(function() {
		$('#statisticsElecAddForm1').form({
			url : getContextPath() + "/actysity/ReadExce.do",
			onSubmit : function() {
				progressLoad();
				var isValid = $(this).form('validate');
				if (!isValid) {
					progressClose();
				}
				return isValid;
			},
			success : function(result) {				
				progressClose(); 
				result = $.parseJSON(result); 
				if (result.success) {
					parent.$.modalDialog.openner_datagrid.datagrid('reload');//之所以能在这里调用到parent.$.modalDialog.openner_treeGrid这个对象，是因为resource.jsp页面预定义好了
                    parent.$.messager.alert({
                        title : '提示信息',
                        msg : '操作成功!',
                        icon : 'info'
                    });
					parent.$.modalDialog.handler.dialog('close');
				}else{ 
					parent.$.messager.alert('错误', result.msg, 'error');
				}
			}
		});
	}); 
</script>
<div>
	<form id="statisticsElecAddForm1" method="post" enctype="multipart/form-data">
			<tr>
				<td style="text-align: center;padding-right: 15px;width: 101px;" colspan="">导入数据</td>
				<td class="td_left" colspan="3"><input id="fileName" name="fileName" required  style="width: 90%;padding-left: 0%;" value="" type="file"  class="easyui-validatebox span2" ></td>
			</tr>
		</table>
	</form>
	</div>

2.POIUtils工具类

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

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;
/**
 * excel读写工具类 */
public class POIUtil {
    private static Logger logger  = LogManager.getLogger(POIUtil.class);
    private final static String xls = "xls";
    private final static String xlsx = "xlsx";

    /**
     * 读入excel文件，解析后返回
     * @param file
     * @throws IOException
     */
    public static List<String[]> readExcel(MultipartFile file) throws IOException{
        //检查文件
        checkFile(file);
        //获得Workbook工作薄对象
        Workbook workbook = getWorkBook(file);
        //创建返回对象，把每行中的值作为一个数组，所有行作为一个集合返回
        List<String[]> list = new ArrayList<String[]>();
        if(workbook != null){
            for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){
                //获得当前sheet工作表
                Sheet sheet = workbook.getSheetAt(sheetNum);
                if(sheet == null){
                    continue;
                }
                //获得当前sheet的开始行
                int firstRowNum  = sheet.getFirstRowNum();
                //获得当前sheet的结束行
                int lastRowNum = sheet.getLastRowNum();
                //循环除了第一行的所有行
                for(int rowNum = firstRowNum+1;rowNum <= lastRowNum;rowNum++){
                    //获得当前行
                    Row row = sheet.getRow(rowNum);
                    if(row == null){
                        continue;
                    }
                    //获得当前行的开始列
                    int firstCellNum = row.getFirstCellNum();
                    //获得当前行的列数
                    int lastCellNum = row.getPhysicalNumberOfCells();
                    String[] cells = new String[row.getPhysicalNumberOfCells()];
                    //循环当前行
                    for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
                        Cell cell = row.getCell(cellNum);
                        cells[cellNum] = getCellValue(cell);
                    }
                    list.add(cells);
                }
            }
            //workbook.close();
        }
        return list;
    }
    public static void checkFile(MultipartFile file) throws IOException{
        //判断文件是否存在
        if(null == file){
            logger.error("文件不存在！");
            throw new FileNotFoundException("文件不存在！");
        }
        //获得文件名
        String fileName = file.getOriginalFilename();
        //判断文件是否是excel文件
        if(!fileName.endsWith(xls) && !fileName.endsWith(xlsx)){
            logger.error(fileName + "不是excel文件");
            throw new IOException(fileName + "不是excel文件");
        }
    }
    public static Workbook getWorkBook(MultipartFile file) {
        //获得文件名
        String fileName = file.getOriginalFilename();
        //创建Workbook工作薄对象，表示整个excel
        Workbook workbook = null;
        try {
            //获取excel文件的io流
            InputStream is = file.getInputStream();
            //根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象
            if(fileName.endsWith(xls)){
                //2003
                workbook = new HSSFWorkbook(is);
            }else if(fileName.endsWith(xlsx)){
                //2007
                workbook = new XSSFWorkbook(is);
            }
        } catch (IOException e) {
            logger.info(e.getMessage());
        }
        return workbook;
    }
    public static String getCellValue(Cell cell){
        String cellValue = "";
        if(cell == null){
            return cellValue;
        }
        //把数字当成String来读，避免出现1读成1.0的情况
        if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){
            cell.setCellType(Cell.CELL_TYPE_STRING);
        }
        //判断数据的类型
        switch (cell.getCellType()){
            case Cell.CELL_TYPE_NUMERIC: //数字
                cellValue = String.valueOf(cell.getNumericCellValue());
                break;
            case Cell.CELL_TYPE_STRING: //字符串
                cellValue = String.valueOf(cell.getStringCellValue());
                break;
            case Cell.CELL_TYPE_BOOLEAN: //Boolean
                cellValue = String.valueOf(cell.getBooleanCellValue());
                break;
            case Cell.CELL_TYPE_FORMULA: //公式
                cellValue = String.valueOf(cell.getCellFormula());
                break;
            case Cell.CELL_TYPE_BLANK: //空值
                cellValue = "";
                break;
            case Cell.CELL_TYPE_ERROR: //故障
                cellValue = "非法字符";
                break;
            default:
                cellValue = "未知类型";
                break;
        }
        return cellValue;
    }
}

3.控制器代码

@RequestMapping(value = "/ReadExce4")
    @ResponseBody
    public Json ReadExce4(MultipartFile fileName, HttpServletRequest request) throws Exception {

        Json j = new Json();
        List<String[]> userList1 = POIUtil.readExcel(fileName);
        try {
            for (int i = 0; i < userList1.size(); i++) {
                String[] toStr = userList1.get(i);

                StatisticsElec elsec = new StatisticsElec();
                if (elsec != null) {

                    elsec.setId(String.valueOf(UUID.randomUUID()));
                    elsec.setStur(toStr[2]);
                    elsec.setStve(toStr[3]);
                    elsec.setStx(toStr[4]);
                    statisticsElecService.insert(elsec);
                }
            }
            j.setSuccess(true);
            j.setObj("0");
        } catch (Exception e) {
            j.setMsg("出现异常：" + e.getMessage());
            e.printStackTrace();
        }
        return j;
    }