本章介紹了如何為超鏈接添加到內容的單元格。超鏈接通常被用來訪問任何網站的網址，電子郵件或外部文件。

下麵的代碼演示如何創建單元格的超鏈接。

import java.io.File;
import java.io.FileOutputStream;
import org.apache.poi.common.usermodel.Hyperlink;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.CreationHelper;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFHyperlink;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class HyperlinkEX 
{
   public static void main(String[] args) throws Exception 
   {
      XSSFWorkbook workbook = new XSSFWorkbook(); 
      XSSFSheet spreadsheet = workbook
      .createSheet("Hyperlinks");
      XSSFCell cell;
      CreationHelper createHelper = workbook
      .getCreationHelper();
      XSSFCellStyle hlinkstyle = workbook.createCellStyle();
      XSSFFont hlinkfont = workbook.createFont();
      hlinkfont.setUnderline(XSSFFont.U_SINGLE);
      hlinkfont.setColor(HSSFColor.BLUE.index);
      hlinkstyle.setFont(hlinkfont);
      //URL Link
      cell = spreadsheet.createRow(1)
      .createCell((short) 1);
      cell.setCellValue("URL Link");
      XSSFHyperlink link = (XSSFHyperlink)createHelper
      .createHyperlink(Hyperlink.LINK_URL);
      link.setAddress("http://www.gitbook.net/" );
      cell.setHyperlink((XSSFHyperlink) link);
      cell.setCellStyle(hlinkstyle);
      //Hyperlink to a file in the current directory
      cell = spreadsheet.createRow(2)
      .createCell((short) 1);
      cell.setCellValue("File Link");
      link = (XSSFHyperlink)createHelper
      .createHyperlink(Hyperlink.LINK_FILE);
      link.setAddress("cellstyle.xlsx");
      cell.setHyperlink(link);
      cell.setCellStyle(hlinkstyle);
      //e-mail link
      cell = spreadsheet.createRow(3)
      .createCell((short) 1);
      cell.setCellValue("Email Link");
      link = (XSSFHyperlink)createHelper
      .createHyperlink(Hyperlink.LINK_EMAIL);
      link.setAddress( 
      "mailto:contact@gitbook.net?"
      +"subject=Hyperlink");
      cell.setHyperlink(link);
      cell.setCellStyle(hlinkstyle);
      FileOutputStream out = new FileOutputStream(
      new File("hyperlink.xlsx"));
      workbook.write(out);
      out.close();
      System.out.println("hyperlink.xlsx written successfully");
   }
}

保存上麵的代碼到文件HyperlinkEX.java。並從命令提示符編譯執行它如下。

$javac HyperlinkEX.java
$java HyperlinkEX

它會生成一個名為hyperlink.xlsx在當前目錄中的Excel文件並顯示在命令提示符處輸出：

hyperlink.xlsx written successfully

hyperlink.xlsx文件如下所示。