java 怎么向Excel中加入超链接，指向相对路径的文件

如何读取超链接

HSSFSheet sheet = workbook.getSheetAt(0);

HSSFCell cell = sheet.getRow(0).getCell((short)0);

HSSFHyperlink link = cell.getHyperlink();

if(link != null){

System.out.println(link.getAddress());

}

如何设置超链接

HSSFWorkbook wb = new HSSFWorkbook();

//超链接的单元格风格

//超链接默认的是蓝色底边框

HSSFCellStyle hlink_style = wb.createCellStyle();

HSSFFont hlink_font = wb.createFont();

hlink_font.setUnderline(HSSFFont.U_SINGLE);

hlink_font.setColor(HSSFColor.BLUE.index);

hlink_style.setFont(hlink_font);

HSSFCell cell;

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

//URL

cell = sheet.createRow(0).createCell((short)0);

cell.setCellValue("URL Link");

HSSFHyperlink link = new HSSFHyperlink(HSSFHyperlink.LINK_URL);

link.setAddress("");

cell.setHyperlink(link);

cell.setCellStyle(hlink_style);

//链接到当前路径的一个文件

cell = sheet.createRow(1).createCell((short)0);

cell.setCellValue("File Link");

link = new HSSFHyperlink(HSSFHyperlink.LINK_FILE);

link.setAddress("link1.xls");

cell.setHyperlink(link);

cell.setCellStyle(hlink_style);

//链接到e-mail

cell = sheet.createRow(2).createCell((short)0);

cell.setCellValue("Email Link");

link = new HSSFHyperlink(HSSFHyperlink.LINK_EMAIL);

//note, if subject contains white spaces, make sure they are url-encoded

link.setAddress("mailto:poi@apache.org?subject=Hyperlinks");

cell.setHyperlink(link);

cell.setCellStyle(hlink_style);

//链接到 workbook的某个地方

//创建一个目标Sheet和单元格

HSSFSheet sheet2 = wb.createSheet("Target Sheet");

sheet2.createRow(0).createCell((short)0).setCellValue("Target Cell");

cell = sheet.createRow(3).createCell((short)0);

cell.setCellValue("Worksheet Link");

link = new HSSFHyperlink(HSSFHyperlink.LINK_DOCUMENT);

link.setAddress("'Target Sheet'!A1");

cell.setHyperlink(link);

cell.setCellStyle(hlink_style);

FileOutputStream out = new FileOutputStream("c://hssf-links.xls");

wb.write(out);

out.close();