poi jxl 生成EXCEL 报表
JAVA生成EXCEL，下面介绍POI 和JXL 生成报表的2种方式。
1.jxl 生成报表

package excel;import java.io.FileOutputStream;import java.io.OutputStream;import java.text.SimpleDateFormat;import java.util.Date;import jxl.Workbook;import jxl.format.Alignment;import jxl.format.Border;import jxl.format.BorderLineStyle;import jxl.format.CellFormat;import jxl.write.Label;import jxl.write.WritableCellFormat;import jxl.write.WritableFont;import jxl.write.WritableSheet;import jxl.write.WritableWorkbook;public class jxlCreate {/*** @param args*/public static void main(String[] args) {// 准备设置excel工作表的标题String[] title = {"编号","产品名称","产品价格","产品数量","生产日期","产地","是否出口"};try {// 获得开始时间long start = System.currentTimeMillis();// 输出的excel的路径String filePath = "c:\\test.xls";// 创建Excel工作薄WritableWorkbook wwb;// 新建立一个jxl文件,即在C盘下生成test.xlsOutputStream os = new FileOutputStream(filePath);wwb=Workbook.createWorkbook(os);// 添加第一个工作表并设置第一个Sheet的名字WritableSheet sheet = wwb.createSheet("产品清单", 0);Label label;for(int i=0;i<title.length;i++){// Label(x,y,z)其中x代表单元格的第x+1列，第y+1行, 单元格的内容是y// 在Label对象的子对象中指明单元格的位置和内容label = new Label(i,0,title[i]);// 将定义好的单元格添加到工作表中sheet.addCell(label);}// 下面是填充数据/*** 保存数字到单元格，需要使用jxl.write.Number* 必须使用其完整路径，否则会出现错误* */// 填充产品编号jxl.write.Number number = new jxl.write.Number(0,1,20071001);sheet.addCell(number);// 填充产品名称label = new Label(1,1,"金鸽瓜子");sheet.addCell(label);/*** 定义对于显示金额的公共格式* jxl会自动实现四舍五入* 例如 2.456会被格式化为2.46,2.454会被格式化为2.45* */jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#.##");jxl.write.WritableCellFormat wcf = new jxl.write.WritableCellFormat(nf);// 填充产品价格jxl.write.Number nb = new jxl.write.Number(2,1,2.45,wcf);sheet.addCell(nb);// 填充产品数量jxl.write.Number numb = new jxl.write.Number(3,1,200);sheet.addCell(numb);/*** 定义显示日期的公共格式* 如:yyyy-MM-dd hh:mm* */SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");String newdate = sdf.format(new Date());// 填充出产日期label = new Label(4,1,newdate);sheet.addCell(label);// 填充产地label = new Label(5,1,"陕西西安");sheet.addCell(label);/*** 显示布尔值* */jxl.write.Boolean bool = new jxl.write.Boolean(6,1,true);sheet.addCell(bool);/*** 合并单元格* 通过writablesheet.mergeCells(int x,int y,int m,int n);来实现的* 表示将从第x+1列，y+1行到m+1列，n+1行合并** */sheet.mergeCells(0,3,2,3);label = new Label(0,3,"合并了三个单元格");sheet.addCell(label);/**** 定义公共字体格式* 通过获取一个字体的样式来作为模板* 首先通过web.getSheet(0)获得第一个sheet* 然后取得第一个sheet的第二列，第一行也就是"产品名称"的字体* */CellFormat cf = wwb.getSheet(0).getCell(1, 0).getCellFormat();WritableCellFormat wc = new WritableCellFormat();// 设置居中wc.setAlignment(Alignment.CENTRE);// 设置边框线wc.setBorder(Border.ALL, BorderLineStyle.THIN);// 设置单元格的背景颜色wc.setBackground(jxl.format.Colour.RED);label = new Label(1,5,"字体",wc);sheet.addCell(label);// 设置字体jxl.write.WritableFont wfont = new jxl.write.WritableFont(WritableFont.createFont("隶书"),20);WritableCellFormat font = new WritableCellFormat(wfont);label = new Label(2,6,"隶书",font);sheet.addCell(label);// 写入数据wwb.write();// 关闭文件wwb.close();long end = System.currentTimeMillis();System.out.println("----完成该操作共用的时间是:"+(end-start)/1000);} catch (Exception e) {System.out.println("---出现异常---");e.printStackTrace();}}}

package excel;import java.io.FileOutputStream;import java.text.SimpleDateFormat;import java.util.Date;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.ss.usermodel.Cell;import org.apache.poi.ss.usermodel.CellStyle;import org.apache.poi.ss.usermodel.DataFormat;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.util.CellRangeAddress;public class poiCreate {/*** @param args*/public static void main(String[] args) throws Exception {//创建一个EXCELWorkbook wb = new HSSFWorkbook();DataFormat format = wb.createDataFormat();CellStyle style;//创建一个SHEETSheet sheet1 = wb.createSheet("产品清单");String[] title = {"编号","产品名称","产品价格","产品数量","生产日期","产地","是否出口"};int i=0;//创建一行Row row = sheet1.createRow((short)0);//填充标题for (String s:title){Cell cell = row.createCell(i);cell.setCellValue(s);i++;}Row row1 = sheet1.createRow((short)1);//下面是填充数据row1.createCell(0).setCellValue(20071001);row1.createCell(1).setCellValue("金鸽瓜子");//创建一个单元格子Cell cell2=row1.createCell(2);// 填充产品价格cell2.setCellValue(2.45);style = wb.createCellStyle();style.setDataFormat(format.getFormat("#.##"));//设定样式cell2.setCellStyle(style);// 填充产品数量row1.createCell(3).setCellValue(200);/*** 定义显示日期的公共格式* 如:yyyy-MM-dd hh:mm* */SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");String newdate = sdf.format(new Date());// 填充出产日期row1.createCell(4).setCellValue(newdate);row1.createCell(5).setCellValue("陕西西安");/*** 显示布尔值* */row1.createCell(6).setCellValue(true);/*** 合并单元格* 通过writablesheet.mergeCells(int x,int y,int m,int n);来实现的* 表示将first row, last row,first column,last column** */Row row2 = sheet1.createRow((short) 2);Cell cell3 = row2.createCell((short) 0);cell3.setCellValue("合并了三个单元格");sheet1.addMergedRegion(new CellRangeAddress(2,2,0,2));FileOutputStream fileOut = new FileOutputStream("d:\\test.xls");wb.write(fileOut);fileOut.close();}}