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。请帮帮我..........
答案 0 :(得分：2)
正如Apache POI Documentation中清楚显示的那样，有两种方法可以访问行和单元格。一种是迭代所有这些（非常适合你想要的所有东西），另一种是通过索引获取行和单元格（当你需要特定的单元格时效果很好）
你说你想要第5,6和7行的第2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;
}
}