工作需要。话不多说。
我们来看传统的poi。使用HSSFWorkbook创建2003格式为xls后缀的文档。如下:
public String toTotal() { String strs = "'40288b163a72fd15013a730d44430004','40288b163a72fd15013a730d44430004'," + "'40288b163a72fd15013a730d44430004','40288b163a72fd15013a730d44430004'," + "'40288b163a72fd15013a730d44430004','40288b163a72fd15013a730d44430004'," + "'40288b163a72fd15013a730d44430004','40288b163a72fd15013a730d44430004'," + "'40288b163a72fd15013a730d44430004','40288b163a72fd15013a730d44430004'"; String sql1 = "select id,question_note,item1,item2,item3,item4,item5,item6,item7,item8" + ",item9,item10,item11 from PR_VOTE_QUESTION where FK_VOTE_PAPER_ID in (" + strs + ")"; String s1 = "SELECT DISTINCT ip from pr_vote_ANSWER where questionid="; dbpool db = new dbpool(); MyResultSet m1 = null; MyResultSet y1 = null; MyResultSet x1 = null; try { m1 = db.executeQuery(sql1); HSSFWorkbook wb = new HSSFWorkbook();// 建立新HSSFWorkbook对象 HSSFSheet sheet = wb.createSheet("total");// 建立新的sheet对象 // HSSFCellStyle cellStyle = wb.createCellStyle();//建立新的cell样式---日期用 // cellStyle.setDataFormat(HSSFDataFormat.getFormat("m/d/yy // h:mm"));//设置cell样式为定制的日期格式 // HSSFCell dCell =row.createCell((short)4); // dCell.setCellvalue(new Date());//设置cell为日期类型的值 // dCell.setCellStyle(cellStyle); //设置该cell日期的显示格式 HSSFRow row = sheet.createRow(0); setCellGBKValue(row.createCell((short) 0), "用户IP"); setCellGBKValue(row.createCell((short) 1), "题目"); setCellGBKValue(row.createCell((short) 2), "选项"); // 四个参数分别是:起始行,起始列,结束行,结束列 sheet.addMergedRegion(new Region(0, (short) 2, 0, (short) 13)); int i = 1; while (m1.next()) { String id = m1.getString("id"); String question_note = m1.getString("question_note"); question_note = question_note.replace("<p>", "").replace("</p>", "").replace(" ", "").replace("<br />", ""); System.out.println("题目:" + question_note); HSSFRow row2 = sheet.createRow((short) i);// 建立新行 HSSFCell cell = row2.createCell((short) 1);// 建立新cell setCellGBKValue(cell, question_note);// 设置cell的整数类型的值 // HSSFRow row1 = sheet.createRow(++i); // setCellGBKValue(row2.createCell((short) 1),""); setCellGBKValue(row2.createCell((short) 2), m1.getString("item1")); setCellGBKValue(row2.createCell((short) 3), m1.getString("item2")); setCellGBKValue(row2.createCell((short) 4), m1.getString("item3")); setCellGBKValue(row2.createCell((short) 5), m1.getString("item4")); setCellGBKValue(row2.createCell((short) 6), m1.getString("item5")); setCellGBKValue(row2.createCell((short) 7), m1.getString("item6")); setCellGBKValue(row2.createCell((short) 8), m1.getString("item7")); setCellGBKValue(row2.createCell((short) 9), m1.getString("item8")); setCellGBKValue(row2.createCell((short) 10), m1.getString("item9")); setCellGBKValue(row2.createCell((short) 11), m1.getString("item10")); setCellGBKValue(row2.createCell((short) 12), m1.getString("item11")); y1 = db.executeQuery(s1 + "'" + id + "'"); while (y1.next()) { String str = "select a.ANSWERID ans,case when a.ANSWERID='1' then Q1.item1 " + " when a.ANSWERID='2' then Q1.item2 when a.ANSWERID='3' then Q1.item3 " + " when a.ANSWERID='4' then Q1.item4 when a.ANSWERID='5' then Q1.item5 " + " when a.ANSWERID='6' then Q1.item6 when a.ANSWERID='7' then Q1.item7 " + " when a.ANSWERID='8' then Q1.item8 when a.ANSWERID='9' then Q1.item9 " + " when a.ANSWERID='10' then Q1.item10 when a.ANSWERID='11' then Q1.item11 " + " end usr_get from pr_vote_ANSWER a " + "INNER JOIN PR_VOTE_QUESTION q1 on q1.id=a.questionid "; String ip = y1.getString("ip"); System.out.println("用户ip:" + ip); HSSFRow row3 = sheet.createRow((short) ++i);// 建立新行 HSSFCell cell3 = row3.createCell((short) 0);// 建立新cell setCellGBKValue(cell3, ip);// 设置cell的整数类型的值 str += " where questionid='" + id + "' and ip='" + ip + "'"; x1 = db.executeQuery(str); while (x1.next()) { int ans = Integer.valueOf(x1.getString("ans")); System.out.println("用户选项:" + ans); HSSFCell cell4 = row3.createCell((short) (ans + 1));// 建立新cell setCellGBKValue(cell4, x1.getString("usr_get"));// 设置cell的值 } db.close(x1); } db.close(y1); i++; } db.close(m1); FileOutputStream fileOut = new FileOutputStream("E:\\调查问卷-统计信息.xls"); wb.write(fileOut); fileOut.close(); } catch (SQLException e) { e.printStackTrace(); if (db != null && x1 != null) { db.close(x1); } if (db != null && y1 != null) { db.close(y1); } if (db != null && m1 != null) { db.close(m1); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if (db != null && x1 != null) { db.close(x1); } if (db != null && y1 != null) { db.close(y1); } if (db != null && m1 != null) { db.close(m1); } } return null; }
类似的创建2007以及版本的xlsx则为XSSFWorkbook。
当然除此之外,我们可以有其它的选择。使用SXSSFWorkbook。目前我只知道poi3.8以上版本有这个玩意。其它没试过。
下载下来后,你可以看有关它的记录。用来输出W级别以上的sql是个不错的选择。数据保存在内存中,它可以及时输出缓冲数据,指定内存中可以放入的数据,超过这个数据我们就进行输出。
//导出每个IP用户的调查问卷 lizhuang public String toDo() { String strs = "'40288b163a72fd15013a730d44430004','40288b163a72fd15013a730d44430004'," + "'40288b163a72fd15013a730d44430004','40288b163a72fd15013a730d44430004'," + "'40288b163a72fd15013a730d44430004','40288b163a72fd15013a730d44430004'," + "'40288b163a72fd15013a730d44430004','40288b163a72fd15013a730d44430004'," + "'40288b163a72fd15013a730d44430004','40288b163a72fd15013a730d44430004'"; String sql1 = "select id,question_note,item1,item2,item3,item4,item5,item6,item7,item8" + ",item9,item10,item11 from PR_VOTE_QUESTION where FK_VOTE_PAPER_ID in (" + strs + ")"; String s1 = "SELECT DISTINCT ip from pr_vote_ANSWER where questionid="; dbpool db = new dbpool(); MyResultSet m1 = null; MyResultSet y1 = null; MyResultSet x1 = null; Map<String, Row> ips = new HashMap<String, Row>();//string对应用户IP,row存储用户所在的行。购物车原型【存储用户ID和商品】 BufferedInputStream bis = null; BufferedOutputStream bos = null; try { m1 = db.executeQuery(sql1); SXSSFWorkbook wb = new SXSSFWorkbook(100);// 只在内存中保留100行数据,大数据时使用。兼容HSSFWorkbook2003和XSSFWorkbook2007 wb.setCompressTempFiles(true); // temp files will be gzipped Sheet sheet = wb.createSheet("total");// 建立新的sheet对象 sheet.setDefaultColumnWidth((short) 15); Row row = sheet.createRow(0); setCellGBKValue(row.createCell((short) 0), "用户IP"); // 合并单元格四个参数分别是:起始行,起始列,结束行,结束列 // sheet.addMergedRegion(new Region(0,(short)2,0,(short)13)); int j = 1;//列的坐标,递增 int k=1;//每个用户一行数据 int cols = 2;// 默认4列 while (m1.next()) { String id = m1.getString("id"); //取标题 String question_note = m1.getString("question_note"); question_note = question_note.replace("<p>", "").replace("</p>", "").replace(" ", "").replace("<br />", ""); setCellGBKValue(row.createCell((short) j++), ""); setCellGBKValue(row.createCell((short) j++), question_note); //取出选项,最多11个,可扩展。 setCellGBKValue(row.createCell((short) j++), m1.getString("item1")); setCellGBKValue(row.createCell((short) j++), m1.getString("item2")); String item3 = m1.getString("item3"); String item4 = m1.getString("item4"); String item5 = m1.getString("item5"); String item6 = m1.getString("item6"); String item7 = m1.getString("item7"); String item8 = m1.getString("item8"); String item9 = m1.getString("item9"); String item10 = m1.getString("item10"); String item11 = m1.getString("item11"); if (item3 != null) { cols = 3; setCellGBKValue(row.createCell((short) j++), item3); } if (item4 != null) { cols = 4; setCellGBKValue(row.createCell((short) j++), item4); } if (item5 != null) { cols = 5; setCellGBKValue(row.createCell((short) j++), item5); } if (item6 != null) { cols = 6; setCellGBKValue(row.createCell((short) j++), item6); } if (item7 != null) { cols = 7; setCellGBKValue(row.createCell((short) j++), item7); } if (item8 != null) { cols = 8; setCellGBKValue(row.createCell((short) j++), item8); } if (item9 != null) { cols = 9; setCellGBKValue(row.createCell((short) j++), item9); } if (item10 != null) { cols = 10; setCellGBKValue(row.createCell((short) j++), item10); } if (item11 != null) { cols = 11; setCellGBKValue(row.createCell((short) j++), item11); } y1 = db.executeQuery(s1 + "'" + id + "'"); Row row3 = null; while (y1.next()) { String str = "select a.ANSWERID ans,case when a.ANSWERID='1' then Q1.item1 " + " when a.ANSWERID='2' then Q1.item2 when a.ANSWERID='3' then Q1.item3 " + " when a.ANSWERID='4' then Q1.item4 when a.ANSWERID='5' then Q1.item5 " + " when a.ANSWERID='6' then Q1.item6 when a.ANSWERID='7' then Q1.item7 " + " when a.ANSWERID='8' then Q1.item8 when a.ANSWERID='9' then Q1.item9 " + " when a.ANSWERID='10' then Q1.item10 when a.ANSWERID='11' then Q1.item11 " + " end usr_get from pr_vote_ANSWER a " + "left JOIN PR_VOTE_QUESTION q1 on q1.id=a.questionid "; String ip = y1.getString("ip"); if (!ips.containsKey(ip)) { row3 = sheet.createRow((short) k++);// 建立新行,每行存储用户IP和答案 ips.put(ip, row3);// 利用购物车原理,只不过购物车存储的是每件商品,这里记录上次的行。 } else { row3 = ips.get(ip);// 如果有商品就取出商品,计算商品数量++,金额++,此处取出上次的行 } setCellGBKValue(row3.createCell((short) 0), ip);// 设置IP str += " where questionid='" + id + "' and ip='" + ip + "'"; x1 = db.executeQuery(str); while (x1.next()) { int ans = Integer.valueOf(x1.getString("ans")); setCellGBKValue(row3.createCell((short) (j - 1 - cols + ans)), x1.getString("usr_get")); } db.close(x1); str = null;// destroy this,collection rubbish } db.close(y1); if (k % 100 == 0) { ((SXSSFSheet) sheet).flushRows(100);// flushRows(0) } } db.close(m1); ByteArrayOutputStream os = new ByteArrayOutputStream(); wb.write(os);// 将excel写入流 byte[] content = os.toByteArray(); InputStream is = new ByteArrayInputStream(content); HttpServletResponse response = ServletActionContext.getResponse(); response.reset(); response.setContentType("application/vnd.ms-excel;charset=utf-8"); // msexcel response.setHeader("Content-Disposition", "attachment;filename=" + new String("调查问卷-统计信息.xlsx".getBytes(), "iso-8859-1")); ServletOutputStream out = response.getOutputStream(); bis = new BufferedInputStream(is); bos = new BufferedOutputStream(out); byte[] buff = new byte[2048]; int bytesRead; // Simple read/write loop. while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) { bos.write(buff, 0, bytesRead); } out.close(); //直接写到本地,测试用 //FileOutputStream fileOut = new FileOutputStream("E:\\调查问卷-统计信息.xlsx"); //wb.write(fileOut); //fileOut.close(); } catch (SQLException e) { e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if (db != null && x1 != null) { db.close(x1); } if (db != null && y1 != null) { db.close(y1); } if (db != null && m1 != null) { db.close(m1); } try { if (bis != null) { bis.close(); } if (bos != null) { bos.close(); } } catch (IOException e) { e.printStackTrace(); } } return null; } private static void setCellGBKValue(Cell cell, String value) { cell.setCellType(Cell.CELL_TYPE_STRING);// 设置CELL的编码信息 cell.setCellValue(value); }
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; import org.apache.poi.hssf.util.Region; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.xssf.streaming.SXSSFSheet; import org.apache.poi.xssf.streaming.SXSSFWorkbook; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream;
之所以使用2007,是因为它支持最大的列数为16000多列。而这正好符合我的需求。客户要求所有用户的回答在同一行显示。显然用2003是不够用的。2003最大才256列。
变态的需求产生这样的效果。
答案的定位显示我没有使用2维数组,因为2维数据需要循环。而我不喜欢在程序中太多的使用循环,此处使用购物车存入商品的原理实现了数据的定位。
算是一种学习吧。记录于此。