// 使用Java POI

　　// 把要两个JAR文件放到lib/ext下

　　// code run against the jakarta-poi-1.5.0-FINAL-20020506.jar.

　　//                  and commons-logging-1.0.jar

　　import java.io.FileOutputStream;

　　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;

　　// code run against the jakarta-poi-1.5.0-FINAL-20020506.jar.

　　//                  and commons-logging-1.0.jar

　　public class aa {

　　static public void main(String[] args) throws Exception {

　　FileOutputStream fos = new FileOutputStream("d://foo.xls");

　　HSSFWorkbook wb = new HSSFWorkbook();

　　HSSFSheet s = wb.createSheet();

　　wb.setSheetName(0, "Matrix");

　　for (short i = 0; i < 50; i++) {

　　HSSFRow row = s.createRow(i);

　　for (short j = 0; j < 50; j++) {

　　HSSFCell cell = row.createCell(j);

　　cell.setCellValue("" + i + "," + j);

　　}

　　}

　　wb.write(fos);

　　fos.close();

　　}

　　}