Java操作文件二（excel）

一、jxl读写excel

需要jxl.jar包

package com.primeton.eos.sdic.file; import java.awt.image.BufferedImage;import java.io.File; import java.util.Date; import javax.imageio.ImageIO; import jxl.Cell; import jxl.CellType; import jxl.DateCell; import jxl.NumberCell; import jxl.Sheet; import jxl.Workbook; import jxl.format.UnderlineStyle; import jxl.write.Label; import jxl.write.WritableCellFormat; import jxl.write.WritableFont; import jxl.write.WritableImage;import jxl.write.WritableSheet; import jxl.write.WritableWorkbook; public class ExcelUtil { //读取excel public void readExcel(String filePath) { Workbook wb = null; try { // 获取excel对象 wb = Workbook.getWorkbook(new File(filePath)); for (int i = 0; i < wb.getNumberOfSheets(); i++) { // 取sheet页 Sheet sheet = wb.getSheet(i); System.out.println("sheet: " + sheet.getName()+ " start ****************"); // 每行读取 for (int rownum = 0; rownum < sheet.getRows(); rownum++) { // 读取列 for (int colnum = 0; colnum < sheet.getColumns(); colnum++) { // 取单元格信息 Cell cell = sheet.getCell(colnum, rownum); if(cell.getType()==CellType.DATE){ DateCell dc=(DateCell)cell; Date date = dc.getDate(); System.out.print(date); }else if(cell.getType()==CellType.NUMBER||cell.getType()==CellType.NUMBER_FORMULA){ NumberCell nc=(NumberCell)cell; double num = nc.getValue(); System.out.print(num); }else{ String str = cell.getContents(); System.out.print(str); } System.out.print("("+cell.getType()+") | "); } System.out.println(); } System.out.println("sheet: " + sheet.getName()+ " end ******************"); } } catch (Exception e) { e.printStackTrace(); } finally{ try{ if(wb!=null){ wb.close(); } }catch(Exception e){ e.printStackTrace(); } } } //写入excel public void writeExcel(String filePath) { WritableWorkbook wwb = null; try { // 读取excel模板文件 // Workbook wb = Workbook.getWorkbook(new File("srcFile.xls")); // WritableWorkbook wwb = Workbook.createWorkbook(new File(filePath),wb); // 创建空的excel wwb = Workbook.createWorkbook(new File(filePath)); // 创建名称为sheet1的sheet页 wwb.createSheet("sheet1", 1); // 获取当前操作sheet WritableSheet ws = wwb.getSheet(0); //预定义的一些字体和格式，同一个Excel中最好不要有太多格式 //字体格式 WritableFont wfont= new WritableFont(WritableFont.ARIAL,12,WritableFont.BOLD,false,UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.BLACK); //单元格格式 WritableCellFormat celFormat= new WritableCellFormat(wfont); celFormat.setAlignment(jxl.format.Alignment.CENTRE);//设置单元格垂直居中 celFormat.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);//设置单元格水平居中 celFormat.setBorder(jxl.format.Border.ALL,jxl.format.BorderLineStyle.THIN, jxl.format.Colour.DARK_BLUE);//边框深蓝色 celFormat.setBackground(jxl.format.Colour.ICE_BLUE);//设置底色为冰蓝 //边框 WritableCellFormat boder = new WritableCellFormat(); boder.setBorder(jxl.format.Border.ALL,jxl.format.BorderLineStyle.THIN, jxl.format.Colour.DARK_BLUE);//边框深蓝色 //数字格式 jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#.##"); WritableCellFormat numFormat = new WritableCellFormat(nf); //日期格式 jxl.write.DateFormat df=new jxl.write.DateFormat("yyyy-MM-dd"); WritableCellFormat dateFormat = new WritableCellFormat (wfont, df); int rows = 0; ws.setColumnView(rows, 15);// 设置列宽 ws.mergeCells(0, rows, 2, rows+1); //合并单元格，0 到 1 行，0 到 2 列 ws.addCell(new Label(0, rows, "****标题****",celFormat)); rows=rows+2; ws.setRowView(rows, 600);// 第 row 行的高度 // 写入数据 ws.addCell(new Label(0, rows, "测试1",celFormat)); ws.addCell(new Label(1, rows, "测试2",celFormat)); ws.addCell(new Label(2, rows, "测试3",celFormat)); rows++; for(int i=rows;i<20;i++){ ws.addCell(new Label(0, i, "测试1", boder)); ws.addCell(new Label(1, i, "测试2", boder)); ws.addCell(new Label(2, i, "测试3", boder)); rows++; } //写入日期时间格式单元格 jxl.write.DateTime labelDT = new jxl.write.DateTime(0, rows, new Date(), dateFormat); ws.addCell(labelDT); //写入数字格式单元格 jxl.write.Number labelNF = new jxl.write.Number(1, rows,-12.3456, numFormat); ws.addCell(labelNF); //写入Boolean格式单元格 jxl.write.Boolean labelBO = new jxl.write.Boolean(2, rows, false); ws.addCell(labelBO); rows++; //写格式单元格 ws.addCell(new Label(0, rows, "测试", celFormat)); //添加图片对象，jxl只支持png格式图片，此处图片会被拉伸 WritableImage wimage = new WritableImage(1, rows,1, 1, new File("D:/logo.png")); ws.addImage(wimage); //添加图片对象，此处保持图片大小100% addImage(2, rows, new File("D:/logo.png"), ws); wwb.write(); } catch (Exception e) { e.printStackTrace(); } finally { try { if (wwb != null) { wwb.close(); } } catch (Exception e) { e.printStackTrace(); } } } /** * 导入图片，保持图片尺寸 * @param double 图片左上角相对excel位置（列位置） * @param double 图片左上角相对excel位置（行位置） * @param File 图片文件 * @param WritableSheet 操作sheet */private static void addImage(double col,double row,File file,WritableSheet ws) throws Exception{// 获取图象大小BufferedImage bi7 = ImageIO.read(file);System.out.println("filePath=" + file.getAbsolutePath());int picWidth = bi7.getWidth(); // 图片宽, 像素 150int picHeight = bi7.getHeight(); // 图片高, 像素 105// 输入参数, 图片显示的位置double picBeginCol = col;double picBeginRow = row;/* * 实际像素: 150/105 = 2.78 cm / 3.97 cm = 4832 / 1590 实际像素: 300/210 = 2倍大小 = * 9600 / 3150 比率: 32 / 15 */// 计算参数( picCellWidth, picCellHeight ), 图片显示大小, 默认 100% 显示: begin// 图片cell宽度 = 图片实际跨越每个cell所占长度的相对各个cell ratio的和// 方法: 根据起始位置,计算图片实际跨越的区域, 然后计算相对ratio,然后累加// double picCellWidth = 0.0; // 是 cell的跨越个数, 可小数double picCellHeight = 0.0;int _picWidth = picWidth * 32; // pic的宽度,循环递减, 是jxl的宽度单位, 32/15for (int x = 0; x < 1234; x++) {int bc = (int) Math.floor(picBeginCol + x); // 3.6 to 3 //// 本次循环所在cell位置int v = ws.getColumnView(bc).getSize(); // 本次cell宽,jxl单位double _offset0 = 0.0; // >= 0 // 离左边的偏移量, 仅 x = 0 的时候才用if (0 == x)_offset0 = (picBeginCol - bc) * v;if (0.0 + _offset0 + _picWidth > v) // _picWidth// 剩余长度超过一个cell时{// 计算本次cell内, pic 所占 ratio值, 累加到 picCellWidthdouble _ratio = 1.0;if (0 == x)_ratio = (0.0 + v - _offset0) / v;// picCellWidth += 1.0;picCellWidth += _ratio;_picWidth -= (int) (0.0 + v - _offset0); // int} else // _picWidth 剩余长度在一个cell内时{double _ratio = 0.0;if (v != 0)_ratio = (0.0 + _picWidth) / v;picCellWidth += _ratio;break;}}// 此时 picCellWidth 是图片实际的值了int _picHeight = picHeight * 15; // pic的高度,循环递减, 是jxl的高度单位, 32/15for (int x = 0; x < 1234; x++) {int bc = (int) Math.floor(picBeginRow + x); // 3.6 to 3 //// 本次循环所在cell位置int v = ws.getRowView(bc).getSize(); // 本次cell高,jxl单位double _offset0 = 0.0; // >= 0 // 离顶部的偏移量, 仅 x = 0 的时候才用if (0 == x)_offset0 = (picBeginRow - bc) * v; // if (0.0 + _offset0 + _picHeight > v) // _picHeight// 剩余长度超过一个cell时{// 计算本次cell内, pic 所占 ratio值, 累加到 picCellHeightdouble _ratio = 1.0;if (0 == x)_ratio = (0.0 + v - _offset0) / v;// picCellHeight += 1.0;picCellHeight += _ratio;_picHeight -= (int) (0.0 + v - _offset0); // int} else // _picHeight 剩余长度在一个cell内时{double _ratio = 0.0;if (v != 0)_ratio = (0.0 + _picHeight) / v;picCellHeight += _ratio;break;}} // 此时 picCellHeight 是图片实际的值了// 计算参数( picCellWidth, picCellHeight ), 图片显示大小, 默认 100% 显示: endSystem.out.println("picBeginCol=" + picBeginCol);System.out.println("picBeginRow=" + picBeginRow);System.out.println("picCellWidth=" + picCellWidth);System.out.println("picCellHeight=" + picCellHeight);WritableImage wimage = new WritableImage(picBeginCol, picBeginRow,picCellWidth, picCellHeight, file);// 图片写到xls中ws.addImage(wimage);} public static void main(String args[]){ ExcelUtil eu = new ExcelUtil(); eu.writeExcel("D:/test.xls"); }}

 

二、poi读写excel

 

五、JavaScript导出excel

html table --> excel

<table id="tableExcel"><tr><td>1</td><td>2</td></tr><tr><td>3</td><td>4</td></tr></table><input type="button" onclick="javascript:method2('tableExcel');" value="导出EXCEL"> <SCRIPT LANGUAGE="javascript"> function method1(tableid) {//整个表格拷贝到EXCEL中 var curTbl = document.getElementById(tableid); var oXL = new ActiveXObject("Excel.Application"); //创建AX对象excel var oWB = oXL.Workbooks.Add(); //获取workbook对象 var oSheet = oWB.ActiveSheet; //激活当前sheet var sel = document.body.createTextRange(); sel.moveToElementText(curTbl); //把表格中的内容移到TextRange中 sel.select(); //全选TextRange中内容 sel.execCommand("Copy"); //复制TextRange中内容 oSheet.Paste(); //粘贴到活动的EXCEL中 oXL.Visible = true; //设置excel可见属性 } function method2(tableid) //读取表格中每个单元到EXCEL中 { var curTbl = document.getElementById(tableid); var oXL = new ActiveXObject("Excel.Application"); //创建AX对象excel var oWB = oXL.Workbooks.Add(); //获取workbook对象 var oSheet = oWB.ActiveSheet; //激活当前sheet var Lenr = curTbl.rows.length; //取得表格行数 for (i = 0; i < Lenr; i++) { var Lenc = curTbl.rows(i).cells.length; //取得每行的列数 for (j = 0; j < Lenc; j++) { oSheet.Cells(i + 1, j + 1).value = curTbl.rows(i).cells(j).innerText; //赋值 } } oXL.Visible = true; //设置excel可见属性 } </SCRIPT>   

一、jxl读写excel