ssm项目导出excel表格

import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import org.apache.commons.lang3.exception.ExceptionUtils;
import org.apache.log4j.Logger;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 
public class ExportExcel<T> {
 
    private final static Logger log = Logger.getLogger(ExportExcel.class);
 
    // 声明一个工作簿
    private static HSSFWorkbook workbook = null;
 
    // 生成一个表格
 
    private static HSSFSheet sheet = null;
 
    // 产生表格标题行
 
    private static HSSFRow row = null;
 
    // 声明一个画图的顶级管理器
    private static HSSFPatriarch patriarch = null;
    // 定义一个excel所容纳的初始数据量(防止数据过多，因为一个excel表格最多只能存65535行记录(excel2003的))，所以这里取40000
 
    private static Integer initial_data = 40000;
 
    // 累计遍历的数量，用来判断是否超过初始数据，如果超过则新建一个sheet
 
    private int length = 0;
 
    public void exportExcel(String headerName, Collection<T> dataset, HttpServletResponse response,HttpServletRequest request,String mimeType) {
 
        try {
            exportExcel(headerName, null,dataset,response,request,"yyyy-MM-dd",mimeType);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
 
    }
   /**
    * 
    * @param headerName		文件名称
    * @param headers		表格头部信息
    * @param dataset		查到的数据集合
    * @param response		响应response
    * @param request		请求request
    * @param mimeType		content类型
    */
    public void exportExcel(String headerName, String[] headers, Collection<T> dataset,HttpServletResponse response,HttpServletRequest request,String mimeType) {
 
        try {
            exportExcel(headerName, headers, dataset,response,request,"yyyy-MM-dd",mimeType);
        } catch (Exception e) {
            e.printStackTrace();
        }
 
    }
 
    @SuppressWarnings("unchecked")
    public void exportExcel(String title, String[] headers, Collection<T> dataset,HttpServletResponse response,HttpServletRequest request, String pattern,String mimeType)
            throws NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException,
            InvocationTargetException {
 
        workbook = new HSSFWorkbook();
 
        sheet = workbook.createSheet();
 
        sheet.autoSizeColumn(1, true);// 自适应列宽度
 
        HSSFFont font = workbook.createFont();
        
        font.setFontName("黑体");
        
        font.setFontHeightInPoints((short)16);
 
        row = sheet.createRow(0);
 
        for (int i = 0; i < headers.length; i++) {
 
            HSSFCell cell = row.createCell(i);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
 
        }
 
        patriarch = sheet.createDrawingPatriarch();
 
        // 遍历集合数据，产生数据行
 
        Iterator<T> it = dataset.iterator();
 
        int index = 0;
 
        while (it.hasNext()) {
 
            index++;
 
            length++;
 
            row = sheet.createRow(index);
 
            T t = (T) it.next();
 
            // 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
 
            Field[] fields = t.getClass().getDeclaredFields();
 
            for (int i = 0; i < fields.length; i++) {
 
                HSSFCell cell = row.createCell(i);
 
                Field field = fields[i];
 
                String fieldName = field.getName();
 
                String getMethodName = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
 
//                System.out.println("我执行到了！！！" + getMethodName);
 
                Class cts = t.getClass();
 
//                System.out.println("我执行到了" + cts.toString());
 
                Method getMethod = cts.getMethod(getMethodName, new Class[] {});
 
                Object value = getMethod.invoke(t, new Object[] {});
 
                String textValue = null;
 
                if (null != value) {
 
                    if (value instanceof Integer) {
 
                        int intValue = (Integer) value;
 
                        cell.setCellValue(intValue);
                    } else if (value instanceof Float) {
 
                        float fValue = (float) value;
 
                        textValue = Float.toString(fValue);
 
                        cell.setCellValue(textValue);
                    } else if (value instanceof Double) {
 
                        double dValue = (double) value;
 
                        cell.setCellValue(dValue);
                    } else if (value instanceof Long) {
 
                        long lValue = (long) value;
 
                        cell.setCellValue(lValue);
                    } else if (value instanceof byte[]) {
 
                        byte[] bValue = (byte[]) value;
 
                        // 有图片时设置行高为60px
                        row.setHeightInPoints(60);
 
                        HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 255, (short) 6, index, (short) 6,
                                index);
 
                        anchor.setAnchorType(2);
 
                        patriarch.createPicture(anchor, workbook.addPicture(bValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
 
                    } else {
 
                        textValue = value.toString();
                    }
                } else {
 
                    textValue = "";
                }
 
                if (textValue != null) {
 
                    Pattern p = Pattern.compile("^//d+(//.//d+)?$");
 
                    Matcher matcher = p.matcher(textValue);
 
                    if (matcher.matches()) {
 
                        // 是数字当做double处理
 
                        cell.setCellValue(Double.parseDouble(textValue));
 
                    } else {
 
                        HSSFRichTextString richString = new HSSFRichTextString(textValue);
 
                        cell.setCellValue(richString);
                    }
                }
            }
 
            if (length % initial_data == 0) {
 
                sheet = workbook.createSheet();
 
                // 设置表格默认宽度为15个字节
                sheet.setDefaultColumnWidth(15);
 
                row = sheet.createRow(0);
 
                for (int i = 0; i < headers.length; i++) {
 
                    HSSFCell cell = row.createCell(i);
 
                    HSSFRichTextString text = new HSSFRichTextString(headers[i]);
 
                    cell.setCellValue(text);
 
                    index = 0;
                }
            }
        }
        try {
        	 ServletOutputStream outputStream = response.getOutputStream();
             //8.获取浏览器信息,对文件名进行重新编码
        	 String fileName = FileUtils.filenameEncoding(title, request);
             //9.设置信息头
             response.setContentType(mimeType);
             response.setHeader("Content-Disposition","attachment;filename="+fileName);
            workbook.write(outputStream);
        } catch (IOException e) {
 
            log.error(ExceptionUtils.getStackTrace(e));
 
            log.error("导出数据失败！！");
        }
 
    }
}

controller方法调用：

	@RequestMapping(value="/export")
	public void export(HttpServletRequest request, HttpServletResponse response) {
		ExportExcel<AirlinesData> stuExcel = new ExportExcel<AirlinesData>();
        
        String[] headers = {"出发","到达","日期","航班","仓位","价格","票数","备注","更新时间"};//表格的头部信息
        
        List<AirlinesData> dataset = airlinesDataService.selectAll();//从数据库查到的数据
        
        String mimeType = servletContext.getMimeType("航空信息表.xls");//生成servletcontext
        Long date = new Date().getTime();
        System.out.println("当前时间："+date);
        //            表格的文件名称   头部信息  数据来源  响应头   请求头   servletcontext
        stuExcel.exportExcel("航空信息表.xls",headers,dataset,response,request,mimeType);
        
        Long end = new Date().getTime();
        
        System.out.println("耗时："+(end-date));
	}