java使用poi技术读取excel表

package priv.lg.bs.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.openxml4j.opc.OPCPackage;
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;



public class ReadExcel {
	
	public List<List<String[]>> readXLS(InputStream input){
		List<List<String[]>> list = new ArrayList<List<String[]>>();
		try {
			OPCPackage op = OPCPackage.open(input);

			XSSFWorkbook wb =new XSSFWorkbook(op);
			
			//获取excel表中的sheet表
			for(int sheetNum=0;sheetNum<wb.getNumberOfSheets();sheetNum++){
				Sheet sheet = wb.getSheetAt(sheetNum);
				
				if(sheet==null)
					continue;
				//获取表中的行
				/*for(Row row:sheet){
					if(row==null)
						continue;
					for(Cell cell:row){
						if(cell==null)
							continue;
						
						//System.out.println(cell);
						//System.out.println(cell.getStringCellValue());
						//System.out.println(cell.getColumnIndex()+"--"+cell.getRowIndex());
						//for(int rowIndex=0;rowIndex<cell.get)
					}
				}*/
				//System.out.println("sheet.getLastRowNum()"+sheet.getLastRowNum());
				
				List<String[]> sheetList = new ArrayList<String[]>();
				for(int rowNum=sheet.getFirstRowNum();rowNum<sheet.getLastRowNum();rowNum++){
					Row row = sheet.getRow(rowNum);

					//System.out.println("row.getLastCellNum()"+row.getLastCellNum());
					if(row==null)
						continue;
					//System.out.print(rowNum+"行	"+row.getLastCellNum());
					String[] ary = new String[row.getLastCellNum()];
					for(int cellNum=row.getFirstCellNum();cellNum<row.getLastCellNum();cellNum++){
						Cell cell = row.getCell(cellNum);
						//System.out.print("--"+cell.getAddress()+"		");
						ary[cellNum]=cell.getStringCellValue();
					}
					sheetList.add(ary);
					//System.out.println();
				}
				list.add(sheetList);
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		return list;
	}
	
	public static void main(String[] args) {
		ReadExcel re = new ReadExcel();
		
		File file = new File("E:/QQFile/17-18-2计算机学院班级课表.xlsx");
		InputStream input;
		try {
			input = new FileInputStream(file);

			List<List<String[]>> list=re.readXLS(input);
			
			for(int i=0;i<list.size();i++){
				for(int j=0;j<list.get(i).size();j++){
					for(int k=0;k<list.get(i).get(j).length;k++){
						System.out.print(list.get(i).get(j)[k]+"%s");
					}
					System.out.println();
				}
			}
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
}

poi包

http://mirror.bit.edu.cn/apache/poi/release/bin/poi-bin-3.17-20170915.zip