1 创建新的工作铺

import java.io.FileOutputStream;import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;public class PoiCreateExcelTest {public static void main(String[] args) {/** * @see <a href="http://poi.apache.org/hssf/quick-guide.html#NewWorkbook">For more</a>*/        // 1 创建新的Excel 工作簿HSSFWorkbook workbook = new HSSFWorkbook();// 在Excel工作簿中建一工作表，其名为缺省值, 也可以指定Sheet名称HSSFSheet sheet = workbook.createSheet();//HSSFSheet sheet = workbook.createSheet("SheetName"); // 2 用于格式化单元格的数据HSSFDataFormat format = workbook.createDataFormat();// 3 创建新行(row),并将单元格(cell)放入其中. 行号从0开始计算.HSSFRow row = sheet.createRow((short) 1);// 4 设置字体HSSFFont font = workbook.createFont();font.setFontHeightInPoints((short) 20); //字体高度font.setColor(HSSFFont.COLOR_RED); //字体颜色font.setFontName("黑体"); //字体font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); //宽度font.setItalic(true); //是否使用斜体
//        font.setStrikeout(true); //是否使用划线// 5 设置单元格类型、设置水平居中HSSFCellStyle cellStyle = workbook.createCellStyle();cellStyle.setFont(font);cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); //水平布局：居中cellStyle.setWrapText(true);// 6 添加单元格注释// 7 创建HSSFPatriarch对象,HSSFPatriarch是所有注释的容器.HSSFPatriarch patr = sheet.createDrawingPatriarch();// 定义注释的大小和位置,详见文档HSSFComment comment = patr.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short)4, 2, (short) 6, 5));// 设置注释内容comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));// 设置注释作者. 当鼠标移动到单元格上是可以在状态栏中看到该内容.comment.setAuthor("Xuys.");// 创建单元格HSSFCell cell = row.createCell((short) 1);HSSFRichTextString hssfString = new HSSFRichTextString("Hello World!");cell.setCellValue(hssfString);//设置单元格内容cell.setCellStyle(cellStyle);//设置单元格样式cell.setCellType(HSSFCell.CELL_TYPE_STRING);//指定单元格格式：数值、公式或字符串cell.setCellComment(comment);//添加注释//格式化数据row = sheet.createRow((short) 2);cell = row.createCell((short) 2);cell.setCellValue(11111.25);cellStyle = workbook.createCellStyle();cellStyle.setDataFormat(format.getFormat("0.0"));cell.setCellStyle(cellStyle);row = sheet.createRow((short) 3);cell = row.createCell((short) 3);cell.setCellValue(9736279.073);cellStyle = workbook.createCellStyle();cellStyle.setDataFormat(format.getFormat("#,##0.0000"));cell.setCellStyle(cellStyle);//自动调整列宽sheet.autoSizeColumn((short)0); //调整第一列宽度sheet.autoSizeColumn((short)1); //调整第二列宽度sheet.autoSizeColumn((short)2); //调整第三列宽度sheet.autoSizeColumn((short)3); //调整第四列宽度try {FileOutputStream fileOut = new FileOutputStream("C:/3.xls");workbook.write(fileOut);fileOut.close();} catch (Exception e) {System.out.println(e.toString());}}}

在网上找的一篇自动调整列宽的案子，下一篇有poi具体的中文api。对于使用poi导出excel大概够用了。