Excel的生成和导出（POI）

示例

Excel文件：

 

 Jar包准备

 

Servlet代码

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class ExcelServlet extends HttpServlet{
    private static final long serialVersionUID = 1L;

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }
    
    /**
     * 生成和导出
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String[] title = {"姓名","性别","年龄"};
        List<String[]> content = new ArrayList<String[]>();
        String[] four = {"四叶","女","17"};
        String[] five = {"五月","女","17"};
        content.add(four);
        content.add(five);
        
        HSSFWorkbook wb = new HSSFWorkbook();
        HSSFSheet sheet = wb.createSheet("五等分的花嫁");//Sheet名
        HSSFRow row = sheet.createRow(0);//行
        HSSFCellStyle style = wb.createCellStyle();//样式
        HSSFFont font = wb.createFont();//字体
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//居中
        font.setFontName("宋体");
        font.setFontHeightInPoints((short) 11);//字体大小
        style.setFont(font);
        //单元格
        HSSFCell cell = null;
        //第一行
        for(int i=0;i<title.length;i++){
            cell = row.createCell(i);
            cell.setCellValue(title[i]);
            cell.setCellStyle(style);
        }
        //内容
        int i=1;
        for(String[] str:content){
            row = sheet.createRow(i++);
            for(int j=0;i<str.length;j++){
                cell = row.createCell(j);
                cell.setCellValue(str[j]);
                cell.setCellStyle(style);
            }
        }
        response.setContentType("application/octet-stream;charset=ISO8859-1");
        response.setHeader("Content-Disposition","attachment;filename="+
                    new String("demo.xls".getBytes(),"ISO8859-1"));
        response.addHeader("Pargam", "no-cache");
        response.addHeader("Cache-Control", "no-cache");
        wb.write(response.getOutputStream());
        response.getOutputStream().flush();
        response.getOutputStream().close();
    }
}