我在测试的时候经常需要去改动case，如果把所有case直接写在单元测试中，非常冗余，我希望可以直接从excel去读取我的测试数据，经过几次试验终于成功了，读取excel主要借助poi jar包，源码如下所示。poi jar包下载地址http://down.51cto.com/data/2012838

ps：因为测试数据仅string类型已够用，所以代码只支持string类型的cell 内容，如果是想支持其他数据类型，需要进一步对cell内容进行判断，此处略过~

package p1;import java.io.BufferedInputStream;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;public class readExcelIntoTxt {public static void main(String[] args) throws Exception {String filePath = "f:\\ReadExcel.xlsx";File file = new File(filePath);int startRowIndex = 0;//从第二行开始读取，第一行默认为列名String[][] content = getData(file, startRowIndex);//从excel读取数据放到“行*列”的二维数组中BufferedWriter writer = new BufferedWriter(new FileWriter(new File("F:\\WriteTxt.txt")));   //将生成的二维数组写入txtint rowLength = content.length;for(int i=0;i<rowLength;i++) {      for(int j=0;j<content[i].length;j++) {System.out.print(content[i][j]+"\t"); writer.write(content[i][j]+"\t");                     }writer.write("\r\n");System.out.println();}writer.close();}public static String[][] getData(File file, int startRowIndex)throws FileNotFoundException, IOException {     // 打开文件     Workbook wb;Sheet st;Row row;Cell cell;FileInputStream fis = new FileInputStream(file);BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));try{                 wb = new HSSFWorkbook(fis);    //.xls读取             }catch(Exception e){        wb = new XSSFWorkbook(bis);//.xlsx读取}List<String[]> rowArray = new ArrayList<String[]>();//所有行组成的数组int maxColumnSize = 0;//二维数组的列最大值for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) //遍历sheet{st = wb.getSheetAt(sheetIndex);for (int rowIndex = startRowIndex; rowIndex <= st.getLastRowNum(); rowIndex++)//遍历行{row = st.getRow(rowIndex);boolean isCellValueNull = true;if (row == null) //空行跳过{                      continue;         }int columnSize = row.getLastCellNum();  //每行的列数if(columnSize>maxColumnSize)//为确保数组的列容量{     maxColumnSize = columnSize;                        }String[] rowValues = new String[columnSize];//每行的值，一维数组Arrays.fill(rowValues, "");//填充默认空值                  for (short columnIndex = 0; columnIndex < columnSize; columnIndex++) //遍历列{String value = "";cell = row.getCell(columnIndex);if (cell != null && cell.getCellType()==XSSFCell.CELL_TYPE_STRING) {          value = cell.getStringCellValue();    }if (cell != null && cell.getCellType()==XSSFCell.CELL_TYPE_NUMERIC) {          value = new DecimalFormat("0").format(cell.getNumericCellValue());}if (value.trim().equals("")) //单元格内容为空则跳过{continue;}rowValues[columnIndex] = value;isCellValueNull = false;}if (!isCellValueNull)//空行则跳过,包括仅有空格的行{rowArray.add(rowValues);}}}bis.close();fis.close();String[][] rowColumnArray = new String[rowArray.size()][maxColumnSize];for (int i = 0; i < rowColumnArray.length; i++) {rowColumnArray[i] = (String[]) rowArray.get(i);           }return rowColumnArray;}       }