Java使用Apache POI操作excel文件

从官方文档中了解到：POI提供的HSSF包用于操作 Excel '97(-2007)的.xls文件，而XSSF包则用于操作Excel2007之后的.xslx文件。

　　 需要的jar包

　　POI官网上下载包并解压获取java操作excel文件必须的jar包：

 

其中dom4j-1.6.1.jar和xbean.jar（下载地址：http://mirror.bjtu.edu.cn/apache/xmlbeans/binaries/   网站：http://xmlbeans.apache.org

　　并不包含在POI提供的jar包中，需要单独下载，否则程序会抛出异常：java.lang.ClassNotFoundException:org.apache.xmlbeans.XmlOptions。

　　 具体代码

　　在Eclipse中创建一个java project，将上面列出来的jar包都加入到工程的classpath中，否则引用不到jar包会报错。

　　直接上代码（代码基本框架来自Apache POI官方网站，自行调整部分）：

　　创建excel文件并写入内容：

public static void createWorkbook() throws IOException {
Workbook wb = new HSSFWorkbook();
String safeName1 = WorkbookUtil.createSafeSheetName("[O'sheet1]");
Sheet sheet1 = wb.createSheet(safeName1);
CreationHelper createHelper = wb.getCreationHelper();
// Create a row and put some cells in it. Rows are 0 based.
Row row = sheet1.createRow((short) 0);
// Create a cell and put a value in it.
Cell cell = row.createCell(0);
cell.setCellValue(1234);
// Or do it on one line.
row.createCell(2).setCellValue(
createHelper.createRichTextString("This is a string"));
row.createCell(3).setCellValue(true);
// we style the second cell as a date (and time). It is important to
// create a new cell style from the workbook otherwise you can end up
// modifying the built in style and effecting not only this cell but
// other cells.
CellStyle cellStyle = wb.createCellStyle();
cellStyle.setDataFormat(createHelper.createDataFormat().getFormat(
"m/d/yy h:mm"));
cell = row.createCell(1);
cell.setCellValue(new Date());
cell.setCellStyle(cellStyle);
// you can also set date as java.util.Calendar
CellStyle cellStyle1 = wb.createCellStyle();
cellStyle1.setDataFormat(createHelper.createDataFormat().getFormat(
"yyyyMMdd HH:mm:ss"));
cellStyle1.setBorderBottom(CellStyle.BORDER_THIN);
cellStyle1.setBottomBorderColor(IndexedColors.BLACK.getIndex());
cellStyle1.setBorderLeft(CellStyle.BORDER_THIN);
cellStyle1.setLeftBorderColor(IndexedColors.GREEN.getIndex());
cellStyle1.setBorderRight(CellStyle.BORDER_THIN);
cellStyle1.setRightBorderColor(IndexedColors.BLUE.getIndex());
cellStyle1.setBorderTop(CellStyle.BORDER_MEDIUM_DASHED);
cellStyle1.setTopBorderColor(IndexedColors.BLACK.getIndex());
cell = row.createCell(4);
cell.setCellValue(Calendar.getInstance());
cell.setCellStyle(cellStyle1);
FileOutputStream fileOut = new FileOutputStream("e:/test/workbook.xls");
wb.write(fileOut);
fileOut.close();
}