JAVA利用jxl读取Excel内容

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

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;


public class testxls {
    public static String xls2String(File file){
        String result = "";
        try{
            FileInputStream fis = new FileInputStream(file);   
            StringBuilder sb = new StringBuilder();   
            jxl.Workbook rwb = Workbook.getWorkbook(fis);   
            Sheet[] sheet = rwb.getSheets();   
            for (int i = 0; i < sheet.length; i++) {   
                Sheet rs = rwb.getSheet(i);   
                for (int j = 0; j < rs.getRows(); j++) {   
                   Cell[] cells = rs.getRow(j);   
                   for(int k=0;k<cells.length;k++)   
                   sb.append(cells[k].getContents());   
                }   
            }   
            fis.close();   
            result += sb.toString();
        }catch(Exception e){
            e.printStackTrace();
        }
        return result;
    }
    public static void main(String[] args){
        File file = new File("D:/luceneData/test5.xls");
        System.out.println(xls2String(file));
    }
}