Java 上传Excel 并解析Excel

这个没什么好说的直接上代码了

调用方法

FileUploadDto fileUploadDto = TransferExcelDateToFileUploadDtoUtil.TransferExcelDateToFileUploadDto(
        request, 2, 8, 0);
// 解析后返回List集合
List<FileUploadBaseDto> baseDtos = fileUploadDto.getList();

 Dto 上传解析的列

package com.hand.utils.excel;


public class FileUploadBaseDto {
    private int rowNum; //行号

    private String attribute1;

    private String attribute2;

    private String attribute3;

    private String attribute4;

    private String attribute5;

    private String attribute6;

    private String attribute7;

    private String attribute8;

    private String attribute9;

    private String attribute10;

    private String attribute11;

    private String attribute12;

    private String attribute13;

    private String attribute14;

    private String attribute15;

    private String attribute16;

    private String attribute17;

    private String attribute18;

    private String attribute19;

    private String attribute20;
    private String attribute21;
    private String attribute22;
    private String attribute23;
    private String attribute24;
    private String attribute25;
    private String attribute26;
    private String attribute27;
    private String attribute28;
    private String attribute29;
    private String attribute30;
    private String attribute31;
    private String attribute32;
    private String attribute33;
    private String attribute34;
    private String attribute35;
    private String attribute36;
    private String attribute37;
    private String attribute38;
    private String attribute39;
    private String attribute40;

    public int getRowNum() {
        return rowNum;
    }

    public void setRowNum(int rowNum) {
        this.rowNum = rowNum;
    }

    public String getAttribute1() {
        return attribute1;
    }

    public void setAttribute1(String attribute1) {
        this.attribute1 = attribute1;
    }

    public String getAttribute2() {
        return attribute2;
    }

    public void setAttribute2(String attribute2) {
        this.attribute2 = attribute2;
    }

    public String getAttribute3() {
        return attribute3;
    }

    public void setAttribute3(String attribute3) {
        this.attribute3 = attribute3;
    }

    public String getAttribute4() {
        return attribute4;
    }

    public void setAttribute4(String attribute4) {
        this.attribute4 = attribute4;
    }

    public String getAttribute5() {
        return attribute5;
    }

    public void setAttribute5(String attribute5) {
        this.attribute5 = attribute5;
    }

    public String getAttribute6() {
        return attribute6;
    }

    public void setAttribute6(String attribute6) {
        this.attribute6 = attribute6;
    }

    public String getAttribute7() {
        return attribute7;
    }

    public void setAttribute7(String attribute7) {
        this.attribute7 = attribute7;
    }

    public String getAttribute8() {
        return attribute8;
    }

    public void setAttribute8(String attribute8) {
        this.attribute8 = attribute8;
    }

    public String getAttribute9() {
        return attribute9;
    }

    public void setAttribute9(String attribute9) {
        this.attribute9 = attribute9;
    }

    public String getAttribute10() {
        return attribute10;
    }

    public void setAttribute10(String attribute10) {
        this.attribute10 = attribute10;
    }

    public String getAttribute11() {
        return attribute11;
    }

    public void setAttribute11(String attribute11) {
        this.attribute11 = attribute11;
    }

    public String getAttribute12() {
        return attribute12;
    }

    public void setAttribute12(String attribute12) {
        this.attribute12 = attribute12;
    }

    public String getAttribute13() {
        return attribute13;
    }

    public void setAttribute13(String attribute13) {
        this.attribute13 = attribute13;
    }

    public String getAttribute14() {
        return attribute14;
    }

    public void setAttribute14(String attribute14) {
        this.attribute14 = attribute14;
    }

    public String getAttribute15() {
        return attribute15;
    }

    public void setAttribute15(String attribute15) {
        this.attribute15 = attribute15;
    }

    public String getAttribute16() {
        return attribute16;
    }

    public void setAttribute16(String attribute16) {
        this.attribute16 = attribute16;
    }

    public String getAttribute17() {
        return attribute17;
    }

    public void setAttribute17(String attribute17) {
        this.attribute17 = attribute17;
    }

    public String getAttribute18() {
        return attribute18;
    }

    public void setAttribute18(String attribute18) {
        this.attribute18 = attribute18;
    }

    public String getAttribute19() {
        return attribute19;
    }

    public void setAttribute19(String attribute19) {
        this.attribute19 = attribute19;
    }

    public String getAttribute20() {
        return attribute20;
    }

    public void setAttribute20(String attribute20) {
        this.attribute20 = attribute20;
    }

    public String getAttribute21() {
        return attribute21;
    }

    public void setAttribute21(String attribute21) {
        this.attribute21 = attribute21;
    }

    public String getAttribute22() {
        return attribute22;
    }

    public void setAttribute22(String attribute22) {
        this.attribute22 = attribute22;
    }

    public String getAttribute23() {
        return attribute23;
    }

    public void setAttribute23(String attribute23) {
        this.attribute23 = attribute23;
    }

    public String getAttribute24() {
        return attribute24;
    }

    public void setAttribute24(String attribute24) {
        this.attribute24 = attribute24;
    }

    public String getAttribute25() {
        return attribute25;
    }

    public void setAttribute25(String attribute25) {
        this.attribute25 = attribute25;
    }

    public String getAttribute26() {
        return attribute26;
    }

    public void setAttribute26(String attribute26) {
        this.attribute26 = attribute26;
    }

    public String getAttribute27() {
        return attribute27;
    }

    public void setAttribute27(String attribute27) {
        this.attribute27 = attribute27;
    }

    public String getAttribute28() {
        return attribute28;
    }

    public void setAttribute28(String attribute28) {
        this.attribute28 = attribute28;
    }

    public String getAttribute29() {
        return attribute29;
    }

    public void setAttribute29(String attribute29) {
        this.attribute29 = attribute29;
    }

    public String getAttribute30() {
        return attribute30;
    }

    public void setAttribute30(String attribute30) {
        this.attribute30 = attribute30;
    }

    public String getAttribute31() {
        return attribute31;
    }

    public void setAttribute31(String attribute31) {
        this.attribute31 = attribute31;
    }

    public String getAttribute32() {
        return attribute32;
    }

    public void setAttribute32(String attribute32) {
        this.attribute32 = attribute32;
    }

    public String getAttribute33() {
        return attribute33;
    }

    public void setAttribute33(String attribute33) {
        this.attribute33 = attribute33;
    }

    public String getAttribute34() {
        return attribute34;
    }

    public void setAttribute34(String attribute34) {
        this.attribute34 = attribute34;
    }

    public String getAttribute35() {
        return attribute35;
    }

    public void setAttribute35(String attribute35) {
        this.attribute35 = attribute35;
    }

    public String getAttribute36() {
        return attribute36;
    }

    public void setAttribute36(String attribute36) {
        this.attribute36 = attribute36;
    }

    public String getAttribute37() {
        return attribute37;
    }

    public void setAttribute37(String attribute37) {
        this.attribute37 = attribute37;
    }

    public String getAttribute38() {
        return attribute38;
    }

    public void setAttribute38(String attribute38) {
        this.attribute38 = attribute38;
    }

    public String getAttribute39() {
        return attribute39;
    }

    public void setAttribute39(String attribute39) {
        this.attribute39 = attribute39;
    }

    public String getAttribute40() {
        return attribute40;
    }

    public void setAttribute40(String attribute40) {
        this.attribute40 = attribute40;
    }
}

解析工具

package com.hand.utils.excel;

import oracle.core.lmx.CoreException;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
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 javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;


public class TransferExcelDateToFileUploadDtoUtil {
    
    public static FileUploadDto TransferExcelDateToFileUploadDto(HttpServletRequest request, int startRowId, int colCount, int sheetIndex) throws Exception {
        /**
         *
         * 功能描述: 
         * 
         * @auther:lkj
         * @date:2018/8/24 上午10:37
         * @param:[request 请求, startRowId 从第几行开始解析, colCount 一共几列, sheetIndex 解析的sheet页]
         * @return:com.hand.utils.excel.FileUploadDto
         *
         */
        //将excel文件流解析为InputStream流
        DiskFileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        List items = upload.parseRequest(request);
        InputStream inputStream = null;

        String excelType = "";
        if(!items.isEmpty()) {
            FileItem item = (FileItem)items.get(0);
            if(!item.isFormField()) {
                inputStream = item.getInputStream();

                //获得当前Excel格式
                String fileName = item.getName();
                excelType = fileName.substring(fileName.lastIndexOf(".") + 1);
            }
        }

        //将该fileInputStream解析为list对象
        FileUploadDto fileUploadDto = TransferExcelDateToFileUploadDtoUtil.transferExcelDateToArrayList(inputStream,excelType,startRowId,colCount,sheetIndex);

        return fileUploadDto;
    }

    /*
       将excel中的数据转换为java对象数组
       传参fileInputStream：excel的文件输入流
       返回：FileUploadDto
    */
    public static  FileUploadDto transferExcelDateToArrayList(InputStream inputStream, String excelType, int startRowId, int colCount, int sheetIndex) throws Exception {
        Sheet sheet;
        Workbook workBook = null;
        List<FileUploadBaseDto> list = new ArrayList<>();
        FileUploadDto fileUploadDto = new FileUploadDto();

        /*
         * 得到sheet
         */
        try {
            if (excelType.equals("xls")){
                workBook = new HSSFWorkbook(inputStream);
            } else {
                workBook = new XSSFWorkbook(inputStream);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        /*
         * 验证：导入模板数据时，如果有多个sheet如何选择？
         */
        int count = workBook.getNumberOfSheets();
        if(count>1){
            throw new Exception("导入模板中存在多页!");
        }

        //获得第一个sheet
        sheet = workBook.getSheetAt(sheetIndex);

        /*
        遍历所有行
         */
        int rownum = sheet.getLastRowNum() + 1;
        for (int i = startRowId-1; i < rownum; i++) {
            Row row = sheet.getRow(i);
            FileUploadBaseDto model = new FileUploadBaseDto();
            model.setRowNum(i+1);

            /*
            构造sheet中单行数据的dto
             */
            for(int j = 0;j < colCount; j++){
                model = TransferExcelDateToFileUploadDtoUtil.setAttribute(model,row,j);
            }
            list.add(model);
        }

        //返回
        fileUploadDto.setList(list);
        fileUploadDto.setN(colCount);
        return fileUploadDto;

    }

    /*
     * 将Row中第colNum列的信息放入FileUploadBaseDto中
     */
    public static FileUploadBaseDto setAttribute(FileUploadBaseDto fileUploadBaseDto,Row row,int colNum ){
        Cell cell = row.getCell(colNum);

        if(cell == null)
            return fileUploadBaseDto;

        if(cell.toString().equals("")){
            return fileUploadBaseDto;
        }

        Class clazz = FileUploadBaseDto.class;
        int count = colNum+1;
        try {
            String val = "";
            switch (cell.getCellType()) {
                case Cell.CELL_TYPE_STRING:
                    val = cell.getStringCellValue();
                    break;
                case Cell.CELL_TYPE_BOOLEAN:
                    Boolean val1 = cell.getBooleanCellValue();
                    val = val1.toString();
                    break;
                case Cell.CELL_TYPE_NUMERIC:
                    if (org.apache.poi.ss.usermodel.DateUtil.isCellDateFormatted(cell)) {
                        Date theDate = cell.getDateCellValue();
                        SimpleDateFormat dff = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                        val = dff.format(theDate);
                    }else{
                        DecimalFormat df = new DecimalFormat("#.##");
                        val = df.format(cell.getNumericCellValue());
                    }
                    break;
                case Cell.CELL_TYPE_BLANK:
                    break;
                default:
                    throw new CoreException("数据类型配置不正确");
            }
            Method method = clazz.getDeclaredMethod("setAttribute" + count,String.class);
            method.invoke(fileUploadBaseDto,val);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return fileUploadBaseDto;
    }

}

返回List 集合

package com.hand.utils.excel;

import java.util.List;

public class FileUploadDto {
    private List<FileUploadBaseDto> list; //将file解析为List集合

    private int n; //列数


    public List<FileUploadBaseDto> getList() {
        return list;
    }

    public void setList(List<FileUploadBaseDto> list) {
        this.list = list;
    }

    public int getN() {
        return n;
    }

    public void setN(int n) {
        this.n = n;
    }
}