java poi操作创建xslx或xsl文件，存本地和进行网络传输两种方式集成

 package com.java.zxf.util;

 import java.io.IOException;
 import java.io.OutputStream;
 import java.net.URLEncoder;
 import java.util.List;
 import javax.servlet.http.HttpServletResponse;
 import org.apache.poi.hssf.usermodel.HSSFCell;
 import org.apache.poi.hssf.usermodel.HSSFRow;
 import org.apache.poi.hssf.usermodel.HSSFSheet;
 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 /**
  * 用来生成xsls或xsl文件的类，生成后可以进行传输下载
  * 注意:前台请不要使用ajax方式发送下载请求,因为其不支持.
  * @author Administrator
  *
  */
 public class XSLXUtil {
     /**
      *
      * @param response
      * @param titlelist:一个list集合，用来指定表头信息
      * @param objlist：一个list结合嵌套,内存list就是表头字段对应得一行数据
      * @param filename：一个文件名，可以自己指定
      * @throws IOException
      */
     public static void getbook(HttpServletResponse response,List<String> titlelist,List<List<String>> objlist,String filename) throws IOException{
         HSSFWorkbook wb = new HSSFWorkbook();
         //建立新的sheet对象（excel的表单）
         HSSFSheet sheet=wb.createSheet();
         //这里是指定每列的宽度256=1字符，依次类推
         for(int x=0;x<ShowString.GDTITLELEN.length;x++){
             sheet.setColumnWidth(x,ShowString.GDTITLELEN[x]);
         }
         //在sheet里创建第一行，参数为行索引(excel的行)，可以是0～65535之间的任何一个
         //HSSFRow row1=sheet.createRow(0);
         //创建单元格（excel的单元格，参数为列索引，可以是0～255之间的任何一个
         //HSSFCell cell=row1.createCell(0);
             //设置单元格内容
         //cell.setCellValue("学员考试成绩一览表");
         //合并单元格CellRangeAddress构造参数依次表示起始行，截至行，起始列， 截至列
         //sheet.addMergedRegion(new CellRangeAddress(0,0,0,3));
         //在sheet里创建第二行

         HSSFRow row1=sheet.createRow(0);
         for(int i=0;i<titlelist.size();i++){
             row1.createCell(i).setCellValue(titlelist.get(i));
         }
         for(int j=0;j<objlist.size();j++){
             HSSFRow row=sheet.createRow(j+1);
             List<String> temp = (List<String>) objlist.get(j);
             for(int k=0;k<temp.size();k++){
                 HSSFCell cell = row.createCell(k);
                 cell.setCellValue(temp.get(k));
             }
         }
         //测试阶段，将文件输出到本地进行存储
         /*OutputStream os = new FileOutputStream("c:\\"+filename);
         wb.write(os);
         os.flush();
         os.close();
         SystemOut.classSystemOut("xslx文件创建成果", "");*/
         response.reset();
         OutputStream output=response.getOutputStream();
         response.setHeader("Content-disposition", "attachment; filename="+ URLEncoder.encode(filename, "UTF-8"));
         response.setContentType("application/msexcel");
         wb.write(output);
         output.close();
         SystemOut.classSystemOut("xslx文件创建成果", "");
     }
 }

 package com.java.zxf.util;

 import java.io.File;

 public interface ShowString {

     public static String picstorage = "imgs"+File.separator+"upload";

     public static String picstorage1 = "imgs/upload";

     public static int defaultEvaluatetime = 7;

     public static int expireinterval = 2;

     public static String GDTYPE = "gd";

     public static String TJTYPE = "tj";

     public static int[] GDTITLELEN = {40*256,256*20,256*20,12*256,30*256,12*256,20*256,15*256,15*256,20*256,30*256,50*256,16*256,15*256,20*256,15*256,10*256,15*256,150*256};

     public static String GDTITLE[] = {"工单编号","机器编号","机器类型","报修人","公司名称","报修手机号","故障归类","工单发起时间","工单结束时间","故障现象","故障描述","报修地址","机器型号","期待服务时间","确认故障","过期时间","是否服务端报修","工单第一提报人","机器其它参数"};

     public static String TJTITLE[] = {};

 }