java使用poi导出Excel的方法

package hyss.util.common;

import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

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.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.util.CellRangeAddress;

/**
 * Excel导出工具类
 * @author ts
 */

public class ExportExcelUtil {
 //显示的导出表的标题
 private String title;
 //导出表的列名
 private String[] rowName ;
 
 private List dataList = new ArrayList();
 
// HttpServletResponse response;
 
 //构造方法，传入要导出的数据
 public ExportExcelUtil(String title,String[] rowName,List dataList){
  this.dataList = dataList;
  this.rowName = rowName;
  this.title = title;
 }
   
 /*
  * 导出数据
  * */
 public void export() throws Exception{
  try{
   HSSFWorkbook workbook = new HSSFWorkbook();      // 创建工作簿对象
   HSSFSheet sheet = workbook.createSheet(title);      // 创建工作表
   
   // 产生表格标题行
   HSSFRow rowm = sheet.createRow(0);
   HSSFCell cellTiltle = rowm.createCell(0);
   rowm.setHeightInPoints(25);           //设置标题行默认行高
   
   //sheet样式定义【getColumnTopStyle()/getStyle()均为自定义方法 - 在下面 - 可扩展】
   HSSFCellStyle columnTitleStyle = this.getTitleTopStyle(workbook);//获取标题行样式
   HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook); //获取列头样式对象
   HSSFCellStyle style = this.getStyle(workbook);     //单元格样式对象
   
   sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (rowName.length-1))); 
   cellTiltle.setCellStyle(columnTitleStyle);
   cellTiltle.setCellValue(title);
   
   // 定义所需列数
   int columnNum = rowName.length;
   HSSFRow rowRowName = sheet.createRow(2);    // 在索引2的位置创建行(最顶端的行开始的第二行)
   rowRowName.setHeightInPoints(25);       //将列头设置默认行高
   // 将列头设置到sheet的单元格中
   for(int n=0;n

/*
* 实现方法
*/
public void exportExcel() throws Exception{
  String title = "测试";
  String[] rowsName = new String[]{"序号","列头1","列头2","列头3","列头4","列头5"};
  List dataList = new ArrayList();
  Object[] objs = null;
  for (int i = 0; i <10; i++) {
   objs = new Object[rowsName.length];
   objs[0] = i;
   objs[1] = "测试1";
   objs[2] = "测试2";
   objs[3] = "测试3";
   objs[4] = "测试4";
   objs[5] = "测试5";
   dataList.add(objs);
  }
  ExportExcelUtil ex = new ExportExcelUtil(title, rowsName, dataList);
  ex.export();
  
 }