poi做Excel数据驱动,支持.xls和.xlsx格式的excel文档，比起jxl强大不少

import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
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.ss.usermodel.WorkbookFactory;
import org.testng.Assert;

public class PoiExcelProvider implements Iterator<Object[]> {
    
    private Workbook book         = null;
    private Sheet    sheet        = null;
    private int      rowNum       = 0;
    private int      currentRowNo = 0;
    private short    columnNum    = 0;
    private String[] columnnName;
    /**获取第一行的所有单元格里面的类容：即key值*/
    public PoiExcelProvider(String filePath,String sheetName) {

        try {
            
            InputStream inputStream = new FileInputStream(filePath);
            book = WorkbookFactory.create(inputStream);
            //取sheet
            sheet = book.getSheet(sheetName);
            rowNum = sheet.getLastRowNum()+1;//获取最后一行的行号,即获取一共有多少行
            //获取当前sheet的第一行数据
            Row row = sheet.getRow(0);
            //第一行数据的一共有多少个单元格
            columnNum = row.getLastCellNum();
            //声明一个数组，长度为第一行所有单元格的长度
            columnnName = new String[columnNum];

            for (int i = 0; i < columnNum; i++) {
                //获取第一行所有单元格的内容，存放到数组columnnName中
                columnnName[i] = row.getCell(i).getStringCellValue();
            }
            this.currentRowNo++;//指向下一行
        } catch (Exception e) {
            e.printStackTrace();
            Assert.fail("unable to read Excel data");
        }
    }
    /*判断Excel是否还有内容*/
    @Override
    public boolean hasNext() {
            //如果一行数据也没有或者当前行号超出最大行号，就关闭Excel
        if (this.rowNum == 0 || this.currentRowNo >= this.rowNum) {

            try {
                book.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
            return false;
        } else {
            // sheet下一行内容为空判定结束
            if ((sheet.getRow(currentRowNo)).getCell(0).equals("")){
                return false;
            }
                
            return true;
        }
    }
    /**读取除key之外的Excel的所有内容*/
    @Override
    public Object[] next() {

        //获取当前行对象
        Row row = sheet.getRow(this.currentRowNo);
        Map<String, String> data = new LinkedHashMap<String, String>();
       
        for (int i = 0; i < this.columnNum; i++) {

            String temp = "";

            try {
                temp = row.getCell(i).getStringCellValue();
            } catch (ArrayIndexOutOfBoundsException ex) {
                temp = "";
            }
            data.put(this.columnnName[i], temp);
        }
        Object object[] = new Object[1];
        object[0] = data;
        this.currentRowNo++;
        return object;
    }
    @Override
    public void remove() {
        throw new UnsupportedOperationException("remove unsupported.");
    }

}