使用poi一步一步建立报表 (excel操作)

 

 

一步一步使用POI做java报表

2008-9-25 15:03:10　　作者：模板天下收集整理　　来源：未知　网友评论 0 条　 论坛1383

　　

读取和重写 Workbooks 

POIFSFileSystem fs = 

new POIFSFileSystem(new FileInputStream("workbook.xls")); 

HSSFWorkbook wb = new HSSFWorkbook(fs); 

HSSFSheet sheet = wb.getSheetAt(0); 

HSSFRow row = sheet.getRow(2); 

HSSFCell cell = row.getCell((short)3); 

if (cell == null) 

cell = row.createCell((short)3); 

cell.setCellType(HSSFCell.CELL_TYPE_STRING); 

cell.setCellValue("a test"); 



// 写入文件 

FileOutputStream fileOut = new FileOutputStream("workbook.xls"); 

wb.write(fileOut); 

fileOut.close(); 



在单元格中换行 

HSSFWorkbook wb = new HSSFWorkbook(); 

HSSFSheet s = wb.createSheet(); 

HSSFRow r = null; 

HSSFCell c = null; 

HSSFCellStyle cs = wb.createCellStyle(); 

HSSFFont f = wb.createFont(); 

HSSFFont f2 = wb.createFont(); 



cs = wb.createCellStyle(); 



cs.setFont( f2 ); 

//开启Word Wrap 

cs.setWrapText( true ); 



r = s.createRow( (short) 2 ); 

r.setHeight( (short) 0x349 ); 

c = r.createCell( (short) 2 ); 

c.setCellType( HSSFCell.CELL_TYPE_STRING ); 

c.setCellValue( "Use \n with word wrap on to create a new line" ); 

c.setCellStyle( cs ); 

s.setColumnWidth( (short) 2, (short) ( ( 50 * 8 ) / ( (double) 1 / 20 ) ) ); 



FileOutputStream fileOut = new FileOutputStream( "workbook.xls" ); 

wb.write( fileOut ); 

fileOut.close(); 

数据格式化 

HSSFWorkbook wb = new HSSFWorkbook(); 

HSSFSheet sheet = wb.createSheet("format sheet"); 

HSSFCellStyle style; 

HSSFDataFormat format = wb.createDataFormat(); 

HSSFRow row; 

HSSFCell cell; 

short rowNum = 0; 

short colNum = 0; 



row = sheet.createRow(rowNum++); 

cell = row.createCell(colNum); 

cell.setCellValue(11111.25); 

style = wb.createCellStyle(); 

style.setDataFormat(format.getFormat("0.0")); 

cell.setCellStyle(style); 



row = sheet.createRow(rowNum++); 

cell = row.createCell(colNum); 

cell.setCellValue(11111.25); 

style = wb.createCellStyle(); 

style.setDataFormat(format.getFormat("#,##0.0000")); 

cell.setCellStyle(style); 



FileOutputStream fileOut = new FileOutputStream("workbook.xls"); 

wb.write(fileOut); 

fileOut.close(); 



使得一个Sheet适合一页 

HSSFWorkbook wb = new HSSFWorkbook(); 

HSSFSheet sheet = wb.createSheet("format sheet"); 

HSSFPrintSetup ps = sheet.getPrintSetup(); 



sheet.setAutobreaks(true); 



ps.setFitHeight((short)1); 

ps.setFitWidth((short)1); 



FileOutputStream fileOut = new FileOutputStream("workbook.xls"); 

wb.write(fileOut); 

fileOut.close(); 



设置打印区域 

HSSFWorkbook wb = new HSSFWorkbook(); 

HSSFSheet sheet = wb.createSheet("Sheet1"); 

wb.setPrintArea(0, "$A$1:$C$2"); 

//为第一个Sheet页设置打印区域 

//也可以这样 

//wb.setPrintArea(0, 0, 1, 0, 0) ，详细参考java doc 



FileOutputStream fileOut = new FileOutputStream("workbook.xls"); 

wb.write(fileOut); 

fileOut.close(); 

设置页脚的页数 

HSSFWorkbook wb = new HSSFWorkbook(); 

HSSFSheet sheet = wb.createSheet("format sheet"); 

HSSFFooter footer = sheet.getFooter() 



footer.setRight( "Page " + HSSFFooter.page() + " of " + HSSFFooter.numPages() ); 



FileOutputStream fileOut = new FileOutputStream("workbook.xls"); 

wb.write(fileOut); 

fileOut.close(); 



使用简便的函数 

这些函数保存在contrib并且提供了一些使用特征功能，例如设置合并单元格的边框，不用创建新样式改变样式属性。 

HSSFWorkbook wb = new HSSFWorkbook(); 

HSSFSheet sheet1 = wb.createSheet( "new sheet" ); 



// 合并单元格 

HSSFRow row = sheet1.createRow( (short) 1 ); 

HSSFRow row2 = sheet1.createRow( (short) 2 ); 

HSSFCell cell = row.createCell( (short) 1 ); 

cell.setCellValue( "This is a test of merging" ); 

Region region = new Region( 1, (short) 1, 4, (short) 4 ); 

sheet1.addMergedRegion( region ); 



// 设置边框和颜色. 

final short borderMediumDashed = HSSFCellStyle.BORDER_MEDIUM_DASHED;

HSSFRegionUtil.setBorderBottom( borderMediumDashed, 

region, sheet1, wb ); 

HSSFRegionUtil.setBorderTop( borderMediumDashed, 

region, sheet1, wb ); 

HSSFRegionUtil.setBorderLeft( borderMediumDashed, 

region, sheet1, wb ); 

HSSFRegionUtil.setBorderRight( borderMediumDashed, 

region, sheet1, wb ); 

HSSFRegionUtil.setBottomBorderColor(HSSFColor.AQUA.index, region, sheet1, wb); 

HSSFRegionUtil.setTopBorderColor(HSSFColor.AQUA.index, region, sheet1, wb); 

HSSFRegionUtil.setLeftBorderColor(HSSFColor.AQUA.index, region, sheet1, wb); 

HSSFRegionUtil.setRightBorderColor(HSSFColor.AQUA.index, region, sheet1, wb); 



// 展示HSSFCellUtil类的用法 

HSSFCellStyle style = wb.createCellStyle(); 

style.setIndention((short)4); 

HSSFCellUtil.createCell(row, 8, "This is the value of the cell", style); 

HSSFCell cell2 = HSSFCellUtil.createCell( row2, 8, "This is the value of the cell"); 

HSSFCellUtil.setAlignment(cell2, wb, HSSFCellStyle.ALIGN_CENTER); 



// 写入文件 

FileOutputStream fileOut = new FileOutputStream( "workbook.xls" ); 

wb.write( fileOut ); 

fileOut.close(); 



在Sheet页中上下移动行 

HSSFWorkbook wb = new HSSFWorkbook(); 

HSSFSheet sheet = wb.createSheet("row sheet"); 



//创建不同的行列 



// 将6-11行移动到0-5行 

sheet.shiftRows(5, 10, -5); 



FileOutputStream fileOut = new FileOutputStream("workbook.xls"); 

wb.write(fileOut); 

fileOut.close(); 



设置一个Sheet页为被选中的 

HSSFWorkbook wb = new HSSFWorkbook(); 

HSSFSheet sheet = wb.createSheet("row sheet"); 

sheet.setSelected(true); 



// 创建不同的行列。。。 



FileOutputStream fileOut = new FileOutputStream("workbook.xls"); 

wb.write(fileOut); 

fileOut.close(); 



设置放大属性 

The zoom is expressed as a fraction. For example to express a zoom of 75% use 3 for the numerator and 4 for the denominator. 

Zoom被明确为一个分数，例如下面的75%使用3作为分子，4作为分母。 

HSSFWorkbook wb = new HSSFWorkbook(); 

HSSFSheet sheet1 = wb.createSheet("new sheet"); 

sheet1.setZoom(3,4); // 75%放大 

FileOutputStream fileOut = new FileOutputStream("workbook.xls"); 

wb.write(fileOut); 

fileOut.close(); 



拆分和冻结窗口 

这里有你创建的两种窗口：冻结窗口和拆分窗口。 

一个冻结窗口是被行和列拆分开的，可以按照如下设置创建冻结窗口。 

sheet1.createFreezePane( 3, 2, 3, 2 ); 

前两个参数是你要用来拆分的列数和行数。后两个参数是下面窗口的可见象限，其中第三个参数是右边区域可见的左边列数，第四个参数是下面区域可见的首行。 

拆分可以将区域分成四个工作区。拆分发生在像素级别而且用户可以通过拖拽到新的位置来判断。 

用如下方式拆分窗口: 

sheet2.createSplitPane( 2000, 2000, 0, 0, HSSFSheet.PANE_LOWER_LEFT ); 

The first parameter is the x position of the split. This is in 1/20th of a point. A point in this case seems to equate to a pixel. The second parameter is the y position of the split. Again in 1/20th of a point. 

第一个参数是拆分的x位置。这里单位是一个点的1/20，在这种比例下点看起来是一个像素。第二个参数是拆分的y位置，也是一个点的1/20。第三、四个参数同上。最后一个参数说明当前哪个窗口有焦点，四个选择HSSFSheet.PANE_LOWER_LEFT, PANE_LOWER_RIGHT, PANE_UPPER_RIGHT or PANE_UPPER_LEFT。 

HSSFWorkbook wb = new HSSFWorkbook(); 

HSSFSheet sheet1 = wb.createSheet("new sheet"); 

HSSFSheet sheet2 = wb.createSheet("second sheet"); 

HSSFSheet sheet3 = wb.createSheet("third sheet"); 

HSSFSheet sheet4 = wb.createSheet("fourth sheet"); 



// 冻结第一行 

sheet1.createFreezePane( 0, 1, 0, 1 ); 

// 冻结第一列 

sheet2.createFreezePane( 1, 0, 1, 0 ); 

// 冻结列和行 

sheet3.createFreezePane( 2, 2 ); 

// 拆分窗口并且使左下方有焦点 

sheet4.createSplitPane( 2000, 2000, 0, 0, HSSFSheet.PANE_LOWER_LEFT ); 



FileOutputStream fileOut = new FileOutputStream("workbook.xls"); 

wb.write(fileOut); 

fileOut.close(); 



反复的行和列（设置打印标题） 

在打印输出的时候需要使用HSSFWorkbook类的setRepeatingRowsAndColumns()方法反复的设置行和列。 

这个方法包含5个参数，第一个参数是Sheet页的索引（从0开始算），第二、三个参数是重写的列的范围。不使用重写功能的话可以设置-1代替。第四、五个参数是重写的行的范围。不使用重写功能的话可以设置-1代替。 

HSSFWorkbook wb = new HSSFWorkbook();