POI操作Excel

一. Apache 的 POI 可以操作ole对象，对Excel的操作更是方便。

 

http://poi.apache.org/hssf/quick-guide.html

 

quick-guide中介绍了基本的对Excel的控制，可以用JUnit逐项测试，直观的了解下功能。

 

功能项如下：

How to create a new workbook

How to create a sheet

How to create cells

How to create date cells

Working with different types of cells

Iterate over rows and cells

Text Extraction

Aligning cells

Working with borders

Fills and color

Merging cells

Working with fonts

Custom colors

Reading and writing

Use newlines in cells.

Create user defined data formats

Fit Sheet to One Page

Set print area for a sheet

Set page numbers on the footer of a sheet

Shift rows

Set a sheet as selected

Set the zoom magnification for a sheet

Create split and freeze panes

Repeating rows and columns

Headers and Footers

Drawing Shapes

Styling Shapes

Shapes and Graphics2d

Outlining

Images

Named Ranges and Named Cells

How to set cell comments

How to adjust column width to fit the contents

Hyperlinks

 

二. 对合并单元格的格式化

 

for (int i = region.getRowFrom(); i <= region.getRowTo(); i++) {

	HSSFRow row = HSSFCellUtil.getRow(i, sheet);

	for (int j = region.getColumnFrom(); j <= region.getColumnTo(); j++) {

		HSSFCell cell = HSSFCellUtil.getCell(row, (short) j);

		//给合并的单元格加边框
		HSSFCellStyle style = wb.createCellStyle();
		style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		style.setBottomBorderColor(HSSFColor.BLACK.index);
		style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		style.setLeftBorderColor(HSSFColor.BLACK.index);
		style.setBorderRight(HSSFCellStyle.BORDER_THIN);
		style.setRightBorderColor(HSSFColor.BLACK.index);
		style.setBorderTop(HSSFCellStyle.BORDER_THIN);
		style.setTopBorderColor(HSSFColor.BLACK.index);

		cell.setCellStyle(style);
	}
}

 

三. 输出文件流

 

//获取到HSSFWorkbook实例（你生成的Excel）
HSSFWorkbook wb = yourManager.generateExcel();

//处理汉字文件名
		String fileName = "统计表";
		fileName = new String(fileName.getBytes("gb2312"), "iso8859-1") + ".xls";

		try {
			response.reset();
			response.setHeader("content-disposition", "attachment;filename=" + fileName);
			response.setContentType("APPLICATION/msexcel");
			wb.write(response.getOutputStream());
		} catch (Exception e) {
			System.out.print(e + "生成Excel统计报表失败！");
		}