form表单提交,Servlet接收并读取Excel文件

时间:2022-11-22 14:42:09

首先是jsp页面:

<body scroll=no style="overflow-y:hidden;" onselectstart="return false">
    <div class="container" style="overflow-y:auto; padding-top:0px;" onscroll="hideAutoTiShi();">
        <div class="row">
            <form action="/ds/excelUploadServlet" enctype="multipart/form-data" method="post">
                <input id="file" type="file" name="file" value="选择文件"/>
                <input id="submit" type="submit" onclick="undo();" value="提交"/>
            </form>
        </div>
    </div>
    <script src="jquery.min.js"></script>
    <script src="jquery.form.js"></script>
    <script src="excel_import.js"></script>
</body>

然后是Servlet的Java服务类

package com.inspur.dtdcommon.ds.cmd;

import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.loushang.next.dao.DaoFactory;

import com.inspur.dtdcommon.ds.dao.DtdCheckEntBasicInfoDao;
import com.inspur.dtdcommon.ds.dao.DtdCheckEntBasicInfoDetailDao;
import com.inspur.dtdcommon.ds.data.DtdCheckEntBasicInfo;
import com.inspur.dtdcommon.ds.data.DtdCheckEntBasicInfoDetail;
import com.inspur.dtdcommon.util.DtdUtil;
import com.inspur.dtdcommon.util.ImportExecl;

public class ExcelUploadServlet extends HttpServlet{
    private DtdUtil dtdUtil = DtdUtil.getInstance();
    private DtdCheckEntBasicInfoDao dao = (DtdCheckEntBasicInfoDao) DaoFactory
            .getDao("com.inspur.dtdcommon.ds.dao.DtdCheckEntBasicInfoDao");
    private DtdCheckEntBasicInfoDetailDao dao_detail = (DtdCheckEntBasicInfoDetailDao) DaoFactory
            .getDao("com.inspur.dtdcommon.ds.dao.DtdCheckEntBasicInfoDetailDao");
    public ExcelUploadServlet() {
        super();
    }
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }
    /**
     * //遍历Excel文件,然后读取文件封装成List数据
     */
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String zhi=null;
        FileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        InputStream inputStream = null;
        DtdCheckEntBasicInfo entity = new DtdCheckEntBasicInfo();
        List<DtdCheckEntBasicInfo> listInfo = new ArrayList<>();
        DtdCheckEntBasicInfoDetail bean = new DtdCheckEntBasicInfoDetail();
        List<DtdCheckEntBasicInfoDetail> listBean = new ArrayList<>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        /**
         * 读取上传文件
         */
        try {
            List  items = upload.parseRequest(req);
            Iterator iter = items.iterator();
            while (iter.hasNext()) {
                FileItem item = (FileItem) iter.next();
                if (!item.isFormField()) {
                    inputStream = item.getInputStream();
                }
            }
        } catch (FileUploadException e) {
            e.printStackTrace();
        }
        /**
         * POI遍历Excel文件,然后读取文件封装成List数据
         */
        ImportExecl poi = new ImportExecl();
        List<List<String>> list = poi.read(inputStream, false);
        if (list != null) {
            for (int i = 1; i < list.size(); i++) {
                List<String> cellList = list.get(i);
                String ID = dtdUtil.getUUID().toUpperCase();
                entity.setId(ID);
                entity.setEntid(ID);
                entity.setEntname(cellList.get(0));
                entity.setAreaid(cellList.get(1));
                entity.setAreaname(cellList.get(2));
                entity.setRegisteraddress(cellList.get(3));
                entity.setAddress(cellList.get(4));
                entity.setSocietycreditcode(cellList.get(5));
                entity.setLerepname(cellList.get(6));
                entity.setLerepmobile(cellList.get(7));
                entity.setLereptelephonenum(cellList.get(8));
                entity.setIssueDate(cellList.get(9));
                entity.setValidDate(cellList.get(10));
                entity.setDataStatus("10");
                entity.setCreateTime(new Date());
                listInfo.add(entity);//处理生成List数组
                System.out.println();
                bean.setId(ID);
                bean.setEntid(ID);
                bean.setEntname(cellList.get(0));
                bean.setRecordInfo(cellList.get(11));
                bean.setFund(cellList.get(12));
                bean.setAssets(cellList.get(13));
                bean.setQualification(cellList.get(14));
                bean.setRegulators(cellList.get(15));
                bean.setBusinessScope(cellList.get(16));
                bean.setRegisteredCapital(cellList.get(17));
                bean.setEstablishTime(sdf.format(new Date()));
                bean.setBusinessStartDate(cellList.get(9));
                bean.setBusinessEndDate(cellList.get(10));
                bean.setRegistrationAuthority(cellList.get(18));
                bean.setApprovalDate(cellList.get(19));
                if("已登记".equals(cellList.get(20))){
                    bean.setRegistrationStatus("1");
                }else{
                    bean.setRegistrationStatus("0");
                }
                listBean.add(bean);
            }
          //遍历Excel文件,然后读取文件封装成List数据,然后插入到数据中
            dao.batchInsert(listInfo);
            dao_detail.batchInsert(listBean);
        }else{
            throw new RuntimeException("请填写Excel内容");
        }
        
    }
    

}
ImportExecl 读取Excel的工具类

package com.inspur.dtdcommon.util;

import java.io.File;
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.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;

/**
 * excel读取 工具类
 * 
 * @jar包
 *      该类使用到了以下jar:
 *      1、poi-ooxml-3.9.jar
 *      2、poi-3.9.jar
 */
public class ImportExecl {

    /**
     * main测试
     */
    public static void main(String[] args) throws Exception {
        ImportExecl poi = new ImportExecl();
        List<List<String>> list = poi.read("E:/批量导入客户模板.xlsx");
        if (list != null) {
            for (int i = 0; i < list.size(); i++) {
                List<String> cellList = list.get(i);
                for (int j = 0; j < cellList.size(); j++) {
                    System.out.print("    " + cellList.get(j));
                }
                System.out.println();
            }
        }
    }

    //总行数
    private int totalRows = 0;

    //总列数
    private int totalCells = 0;

    //错误信息
    private String errorInfo;

    //构造方法
    public ImportExecl() {
    }

    /**
     * 得到总行数
     */
    public int getTotalRows() {
        return totalRows;
    }

    /**
     * 得到总列数
     */
    public int getTotalCells() {
        return totalCells;
    }

    /**
     * 得到错误信息
     */
    public String getErrorInfo() {
        return errorInfo;
    }

    /**
     * 验证excel文件
     */
    public boolean validateExcel(String filePath) {
        /** 检查文件名是否为空或者是否是Excel格式的文件 */
        if (filePath == null || !(CheckExcelUtil.isExcel2003(filePath) || CheckExcelUtil.isExcel2007(filePath))) {
            errorInfo = "文件名不是excel格式";
            return false;
        }

        /** 检查文件是否存在 */
        File file = new File(filePath);
        if (file == null || !file.exists()) {
            errorInfo = "文件不存在";
            return false;
        }
        return true;
    }

    /**
     * 根据文件路径读取excel文件
     */
    public List<List<String>> read(String filePath) throws IOException {
        List<List<String>> dataLst = new ArrayList<List<String>>();
        InputStream is = null;
        try {
            /** 验证文件是否合法 */
            if (!validateExcel(filePath)) {
                System.out.println(errorInfo);
                return null;
            }

            /** 判断文件的类型,是2003还是2007 */
            boolean isExcel2003 = true;
            if (CheckExcelUtil.isExcel2007(filePath)) {
                isExcel2003 = false;
            }

            /** 调用本类提供的根据流读取的方法 */
            File file = new File(filePath);
            is = new FileInputStream(file);
            dataLst = read(is, isExcel2003);
            is.close();
            is = null;
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                    is = null;
                    e.printStackTrace();
                }
            }
        }
        return dataLst;
    }

    /**
     * 根据流读取Excel文件
     * 
     * @param inputStream 文件输入流
     * @param isExcel2003 标识是否2003的excel。
 *                        true:是2003的excel,false:是2007的excel
     * @return
     * 
     * @扩展说明 
     *          如果使用springmvc的MultipartFile接收前端上传的excel文件的话,可以使用MultipartFile的对象,获取上传的文件名称,
     *          然后,可以通过 CheckExcelUtil 类的方法,接收文件名称参数,来判断excel所属的版本。最后再调用此方法来读取excel数据。
     * 
     */
    public List<List<String>> read(InputStream inputStream, boolean isExcel2003) {
        List<List<String>> dataLst = null;
        try {
            /** 根据版本选择创建Workbook的方式 */
            Workbook wb = null;
            if (isExcel2003) {
                wb = new HSSFWorkbook(inputStream);
            } else {
                wb = new XSSFWorkbook(inputStream);
            }
            dataLst = read(wb);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return dataLst;
    }

    /**
     * 读取数据
     */
    private List<List<String>> read(Workbook wb) {
        List<List<String>> dataLst = new ArrayList<List<String>>();
        //得到第一个shell
        Sheet sheet = wb.getSheetAt(0);
        //得到Excel的行数
        this.totalRows = sheet.getPhysicalNumberOfRows();
        //得到Excel的列数
        if (this.totalRows >= 1 && sheet.getRow(0) != null) {
            this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
        }

        //循环Excel的行
        for (int r = 0; r < this.totalRows; r++) {
            Row row = sheet.getRow(r);
            if (row == null) {
                continue;
            }
            List<String> rowLst = new ArrayList<String>();
            //循环Excel的列
            for (int c = 0; c < this.getTotalCells(); c++) {
                Cell cell = row.getCell(c);
                String cellValue = "";
                if (null != cell) {
                    cell.setCellType(HSSFCell.CELL_TYPE_STRING); //把所有的Excel内容当做字符串处理
                    // 以下是判断数据的类型
                    switch (cell.getCellType()) {
                    case HSSFCell.CELL_TYPE_NUMERIC: // 数字
                        cellValue = cell.getNumericCellValue() + "";
                        break;

                    case HSSFCell.CELL_TYPE_STRING: // 字符串
                        cellValue = cell.getStringCellValue();
                        break;

                    case HSSFCell.CELL_TYPE_BOOLEAN: // Boolean
                        cellValue = cell.getBooleanCellValue() + "";
                        break;

                    case HSSFCell.CELL_TYPE_FORMULA: // 公式
                        cellValue = cell.getCellFormula() + "";
                        break;

                    case HSSFCell.CELL_TYPE_BLANK: // 空值
                        cellValue = "";
                        break;

                    case HSSFCell.CELL_TYPE_ERROR: // 故障
                        cellValue = "非法字符";
                        break;

                    default:
                        cellValue = "未知类型";
                        break;
                    }
                }
                rowLst.add(cellValue);
            }

            //保存第r行的第c列
            dataLst.add(rowLst);
        }
        return dataLst;
    }

}

class CheckExcelUtil {
    /**
     * 检查是否是2003的excel,若是,则返回true
     */
    public static boolean isExcel2003(String filePath) {
        return filePath.matches("^.+\\.(?i)(xls)$");
    }

    /**
     * 检查是否是2007的excel,若是,则返回true
     */
    public static boolean isExcel2007(String filePath) {
        return filePath.matches("^.+\\.(?i)(xlsx)$");
    }
}

 

最后不要忘了web.xml

<servlet>
        <servlet-name>ExcelUploadServlet</servlet-name>
        <servlet-class>com.inspur.dtdcommon.ds.cmd.ExcelUploadServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>ExcelUploadServlet</servlet-name>
        <url-pattern>/excelUploadServlet</url-pattern>
    </servlet-mapping>

 

然后就完成了Excel内容读取,Excel如下:

form表单提交,Servlet接收并读取Excel文件

 

 读取Excel的时候,是从第二行开始读取的,如果需要从第一行开始读取修改ExcelUploadServlet.java文件中
for (int i = 1; i < list.size(); i++) {}
把其中的i=1修改成i=0就会从Excel第一行开始读取。