XLSTransformer 导出Excel数据[通俗易懂]

<pre name="code" class="java">package cn.export.util;
import java.io.FileInputStream;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.jxls.transformer.XLSTransformer;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
/**
 * 导出文件util
 * @author
 */
public class ExportUtil {
	@SuppressWarnings("unchecked")
	public static void exportData(HttpServletRequest req, HttpServletResponse resp, List results,String fileName, 
			String year,String quarter, String filePath) throws Exception{
		FileInputStream fis = null;
		ServletOutputStream os = null;
		XLSTransformer transformer = new XLSTransformer();
		Map params = new HashMap();
		params.put("year", year);
		params.put("quarter", quarter);
		params.put("results", results);
		
		fis = new FileInputStream(filePath);
		resp.addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8") + ".xls");
		resp.setContentType("application/vnd.ms-excel;charset=gbk");
		resp.setHeader("Location", URLEncoder.encode(fileName,"UTF-8") + ".xls");
		
		HSSFWorkbook wb =  transformer.transformXLS(fis, params);
		os = resp.getOutputStream();
		wb.write(os);
		os.flush();
		os.close();
		fis.close();
	}
}

package cn.export.com;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.export.util.ExportUtil;
public class ExportServlet extends HttpServlet{
	
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		this.doPost(req, resp);
	}
	
	@SuppressWarnings("unchecked")
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp){
		try {
			String fileName = "服装销售统计";
			List results = new ArrayList();
			for(int i = 0; i < 3; i++){
				Map resMap = new HashMap();
				resMap.put("id", i);
				resMap.put("name", "女装"+i);
				resMap.put("area", "广州");
				resMap.put("traffic", "高铁");
				resMap.put("level", "A");
				resMap.put("time", "2014/09/19");
				resMap.put("operator", "张三");
				resMap.put("remark", "销售良好");
				results.add(i, resMap);
			}
			URL url = this.getClass().getClassLoader().getResource("");
			String filePath = url.getPath() + "doc/fz.xls";
			ExportUtil.exportData(req, resp, results, fileName, "2014", "2", filePath);
		} catch (Exception e) {
		}finally{
			try {
			} catch (Exception e) {
			}
		}
	}
}