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我的jsp文件是（上传excel文件）：

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
    <form method="post" action="UploadAction" enctype="multipart/form-data">
    Upload the *.xls file: <input type="file" name="file" value="file"> 
    <br><br>
    <input type="submit" value="Submit">
</body>
</html>

我的 Servlet 代码是（处理 excel 文件）

import javax.servlet.ServletException;
import javax.servlet.http.*;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.File;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.util.List;
import java.util.Iterator;


import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;

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;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;

public class UploadAction extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    doPost(request, response);
}

public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException
{
    boolean isMultipart = ServletFileUpload.isMultipartContent(request);
    PrintWriter out = response.getWriter();
    Connection conn = null;
    PreparedStatement pstmt = null;
    String query = "INSERT INTO mydoct(ID) VALUES (?)";
    if(isMultipart) 
    {
        try
        {
            FileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload upload = new ServletFileUpload(factory);
            List items = upload.parseRequest(request);
            Iterator iter = items.iterator();
            while (iter.hasNext()) 
            {
                FileItem item = (FileItem) iter.next();
                if(!item.isFormField()) 
                {
                    String fileName = item.getName();
                    String root = getServletContext().getRealPath("/");
                    File path = new File(root + "/MyDoctors");
                    if (!path.exists()) {
                        boolean status = path.mkdirs();
                    }
                    File uploadedFile = new File(path + "/" + fileName);
                    String fpath = uploadedFile.getAbsolutePath();
                    //out.println(fpath);
                    int mid = fileName.lastIndexOf(".");
                    String ext = fileName.substring(mid+1,fileName.length());
                    //out.println(ext);
                    if((ext.toLowerCase().equals("xls"))||(ext.toLowerCase().equals("xlsx")))
                    {
                        item.write(uploadedFile);

                        try {
                            Class.forName("com.mysql.jdbc.Driver");
                            String url = "jdbc:mysql://localhost:3306/test";
                            conn = DriverManager.getConnection(url,"root","root");
                            pstmt = conn.prepareStatement(query);


                            FileInputStream file = new FileInputStream(new File(fpath));
                            HSSFWorkbook wb = new HSSFWorkbook(file);

                            //Get first sheet from the workbook
                            HSSFSheet sheet = wb.getSheetAt(0);

                            //Find the total number of rows.
                            int rows = sheet.getPhysicalNumberOfRows();
                            out.println(rows);

                            //Iterate through each rows from first sheet
                            Iterator<Row> rowIterator = sheet.iterator();

                            //while(rowIterator.hasNext()) {
                            for(int i = 1; i<=rows; i++){
                            Row row = rowIterator.next();

                            //find the total no columns in a particular raw.
                            HSSFRow rcol = sheet.getRow(i);
                            int cells = 0;
                            if (row != null) {
                            cells = row.getPhysicalNumberOfCells();
                            //out.println(cells);
                            }
                            //For each row, iterate through each columns
                            Iterator<Cell> cellIterator = row.cellIterator();
                            //while(cellIterator.hasNext()) {
                             for(int j = 0; j<cells; j++){            
                             Cell cell = cellIterator.next();





                            switch(cell.getCellType()) {
                                case Cell.CELL_TYPE_BOOLEAN:
                                     out.print(cell.getBooleanCellValue() + "\t\t");
                                    break;
                                case Cell.CELL_TYPE_NUMERIC:
                                    out.print(cell.getNumericCellValue() + "\t\t");
                                    break;
                                case Cell.CELL_TYPE_STRING:
                                     out.print(cell.getStringCellValue() + "\t\t");
                                     break;
                                 } 


                               } 
                             }
                                file.close();
                                FileOutputStream fos = new FileOutputStream(new File(fpath));
                                wb.write(fos);
                                out.close();

                            } catch (FileNotFoundException e) {
                                e.printStackTrace();
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                    }
                }else {
                    out.println("invalid file");
                }
            }
        }catch(Exception ex)
        {
            ex.printStackTrace();
        }
    }
}
}

我想阅读第 5 行、第 6 行和第 7 行的第 2 列和第 3 列。请帮我..........

4

1 回答 1

2

正如Apache POI 文档中清楚显示的那样，访问行和单元格有两种广泛的方法。一种是遍历所有这些（非常适合需要所有内容的情况），另一种是按索引获取行和单元格（当您需要特定单元格时效果很好）

你说过你想要第 5、6 和 7 行的第 2 列和第 3 列。这很容易：

 Sheet s = workbook.getSheetAt(0);

 // Rows and Cells are 0 based not 1 based
 Row r5 = s.getRow(4);
 Row r6 = s.getRow(5);
 Row r7 = s.getRow(6);
 if (r5 == null || r6 == null || r7 == null) {
    throw new IllegalArgumentException("At least one required row is empty");
 }

 Cell c5_2 = r5.getCell(1);
 Cell c5_3 = r5.getCell(2);
 Cell c6_2 = r6.getCell(1);
 Cell c6_3 = r6.getCell(2);
 Cell c7_2 = r7.getCell(1);
 Cell c7_3 = r7.getCell(2);

 // Now use them

 // eg
 for (Cell cell : new Cell[] { c5_2, c5_3, c6_2, c6_3 } ) {
     switch(cell.getCellType()) {
         case Cell.CELL_TYPE_BOOLEAN:
             out.print(cell.getBooleanCellValue() + "\t\t");
             break;
         case Cell.CELL_TYPE_NUMERIC:
             out.print(cell.getNumericCellValue() + "\t\t");
             break;
         case Cell.CELL_TYPE_STRING:
             out.print(cell.getStringCellValue() + "\t\t");
             break;
      }      
  }
于 2013-05-20T18:37:14.657 回答