Apache POI 应用另一篇-Java频道-中国IT实验室

 import java.io.FileOutputStream;

    import org.apache.poi.hssf.usermodel.HSSFCell;
    import org.apache.poi.hssf.usermodel.HSSFCellStyle;
    import org.apache.poi.hssf.usermodel.HSSFDataFormat;
    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;

    public class POI_ExcelDemo {

        /**
         * @param args
         */
        public static void main(String[] args) {
            /**
             * author youjianbo
             * date 2008-6-26
             * 使用Apache POI生成Excel
             * */
            try
            {
                POI_ExcelDemo excelDemo = new POI_ExcelDemo();
                String []values = {"a","b","c","d","e","f","j"};
                //建立工作簿
                HSSFWorkbook workbook = new HSSFWorkbook();
                //建立Excel 页
                HSSFSheet sheet = workbook.createSheet();
                excelDemo.setColumnWidth(sheet);
                //给sheet取名，并设置编码
                workbook.setSheetName(0, "第一张sheet", HSSFWorkbook.ENCODING_UTF_16);
                //建立Excel title

                HSSFCellStyle style = excelDemo.createTitleStyle(workbook);
                HSSFRow rowTitle = sheet.createRow(0);
                for(int i=0;i<3;i++)
                {
                    HSSFCell cellTitle = rowTitle.createCell((short)i);
                    cellTitle.setCellStyle(style);
                    cellTitle.setCellValue("The "+(i+1)+" Cell");
                }
                //建立Excel行，这里建立两行三列
                for(int i=1;i<3;i++)
                {
                    HSSFRow row = sheet.createRow(i);
                    for(int j=1;j<4;j++)
                    {
                        HSSFCell cell = row.createCell((short)(j-1));
                        cell.setCellType(HSSFCell.CELL_TYPE_STRING);
                        cell.setEncoding(HSSFCell.ENCODING_UTF_16);
                        cell.setCellStyle(style);
                        cell.setCellValue(values[i*j]);
                    }
                }
                //sheet.createFreezePane(3, 2);//分割工作区
                //将生成的excel写入
                String path = excelDemo.getClassPath();
                System.out.println("获得的路径是："+path);
                FileOutputStream fileWrite = new FileOutputStream(path+"");
                workbook.write(fileWrite);
                fileWrite.flush();
                fileWrite.close();
                System.out.println("Excel 生成成功");
            }catch(Exception e)
            {
                e.printStackTrace();
                System.out.println(e.getMessage());
            }
        }
        //获得工程目录路径
        private String getClassPath()
        {
            return this.getClass().getClassLoader().getResource("").getPath();
        }
        //设置cell Style
        private HSSFCellStyle createTitleStyle(HSSFWorkbook wb) {
            HSSFFont boldFont = wb.createFont();
            boldFont.setFontHeight((short) 200);
            HSSFCellStyle style = wb.createCellStyle();
            style.setFont(boldFont);
            style.setDataFormat(HSSFDataFormat.getBuiltinFormat("###,##0.00"));
            style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
            return style;
        }
        //设置Cell 宽度
        private void setColumnWidth(HSSFSheet sheet)
        {
            //根据你数据里面的记录有多少列，就设置多少列
            sheet.setColumnWidth((short) 0, (short) 3000);
            sheet.setColumnWidth((short) 1, (short) 3000);
            sheet.setColumnWidth((short) 2, (short) 3000);
        }
    }

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