无需上传附件到服务器，Servlet读取Excel

Posted 2020-09-19 街头小瘪三

package com.str;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

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

import org.apache.poi.hssf.model.Workbook;
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;

public class ReadExcel extends HttpServlet{
 
 @Override
 protected void doGet(HttpServletRequest req, HttpServletResponse resp)
   throws ServletException, IOException {
  
  byte[] junk = new byte[1024];   
        int bytesRead = 0;   
        
        ServletInputStream is = req.getInputStream();
        
        // shou首先除去Http Head   
        bytesRead   =   is.readLine(junk,0,junk.length);   
        bytesRead   =   is.readLine(junk,0,junk.length);   
        bytesRead   =   is.readLine(junk,0,junk.length);   
        bytesRead   =   is.readLine(junk,0,junk.length);   

        HSSFWorkbook wb = new HSSFWorkbook(is);
        HSSFSheet sheet = wb.getSheetAt(0);
        for(int j=0;j< sheet .getLastRowNum()+1;j++) {
         
         //创建一个行对象
         
         HSSFRow row = sheet.getRow(j);
         
         //把一行里的每一个字段遍历出来
         
         for(int i=0;i<row.getLastCellNum();i++) {
         //创建一个行里的一个字段的对象，也就是获取到的一个单元格中的值
         HSSFCell cell = row.getCell(i);
         //在这里我们就可以做很多自己想做的操作了，比如往数据库中添加数据等
         System.out.print(cell.toString() + " " );
         }
          System.out.println("  ");
         }
 }
 
 @Override
 protected void doPost(HttpServletRequest req, HttpServletResponse resp)
   throws ServletException, IOException {
  doGet(req, resp);
 }
}