Java 导出excel文件

public Map<String,String> doExport(String sort,long fondsId,long metadataType) throws IOException{
			
			//让用户选择导出文件的目录
			
			MetaDataService meService=new MetaDataService();
			List<MetadataPO> metaList=meService.getmetaDataList(sort,fondsId,metadataType).getList();
			StringBuffer strMessage=new StringBuffer();

			//创建一个工作表
			//创建cell代号
			int  z=0;
			HSSFWorkbook hssfworkbook = new HSSFWorkbook();
			Sheet sheet=hssfworkbook.createSheet();
			//导出元数据的表头信息
			String metaData[]={
				"元数据名称","元数据中文显示名称","元数据英文显示名称","元数据参照类型","元数据长度","元数据显示长度","元数据默认值","元数据说明","元数据属性","是数据是否参照",
				"元数据参照类型","实体分类ID","是否自动增长","自动增长类型","自动增长位数","自动增长步长","是否创建索引","是否自动全选","是否携带项","是否必录项",
				"约束规则","格式化字符串","文字颜色","显示位置","是否显示","是否归档库显示","是否整理库显示","归档类型","数据类别"
			};
			Row row0=sheet.createRow(0);
			strMessage.append("导出结果:\n开始导出元数据！！！！！\n");
			for(int k=0;k<29;k++){
   			 row0.createCell(k).setCellValue(metaData[k]);
			}
			//开始创建元数据
			
			for(int i=1;i<=metaList.size();i++){
				Row row=sheet.createRow(i);
				MetadataPO mePoExport=metaList.get(i-1);
				//1获取元数据名称

				row.createCell(z).setCellValue(mePoExport.getName());
				z++;
				//2获取元数据中文名称
				row.createCell(z).setCellValue(mePoExport.getDisplaylabelZh());
				z++;
				//2数据中文名称

				…………………这里为n个设置设置单元格值的代码与上下类似故删除…………………
				//数据类别
				row.createCell(z).setCellValue(mePoExport.getType());
				z=0;
			}
			strMessage.append("成功导出"+metaList.size()+"条数据!\n");
			strMessage.append("元数据已经保存到桌面：\n元数据__[时间].xml");
			FileSystemView fsv = FileSystemView.getFileSystemView();

			String deskpath=fsv.getHomeDirectory().toString();
			//会将导出的元数据表默认保存到桌面
			File file=new File(deskpath+"/元数据__"+DateUtil.getTimeStamp()+".xls");
		    FileOutputStream   fOut  = new  FileOutputStream(file);  
		    hssfworkbook.write(fOut);
		    fOut.close();
		    
		    Map<String,String>  map=new HashMap<String, String>();
		    map.put("message",strMessage.toString());
			return map;
		}