java实现导出Excel(跨行,跨列)
先来个最终结果样式:
第一步: 传参,后期可根据自己需要进行调整。我这里需要的是
quarter 代表季度
dptid 部门编号
根据接受过来的参数进行文档命名。
UserInfo userInfo=(UserInfo)request.getSession().getAttribute("userInfo"); String userid=userInfo.getUserID(); String quarter = request.getParameter("quarter"); String dptid = request.getParameter("dptid"); /***********************EXCEL导出部分**************************/ String str3 = FileInfoTools.getSystemFilePath() + "/documentTemp/"; File file = new File(str3); if (!file.exists() && !file.isDirectory()) { file.mkdir(); } String names = new SimpleDateFormat("yyyyMMddhhmmssSSS").format(new Date()); String ourl = str3 + names + "_"+userid+".xls"; FileOutputStream fos = null; String fileName = ""; try { HSSFWorkbook wb = new HSSFWorkbook();//创建工作薄 fileName = "安全可控导出"+"_"+userid+"_"+names+".xls"; DBManager dbm = new DBManager(); System.out.println("quarter+"+quarter+"dptid="+dptid); try{ dbm.newConnection(); String str = "select departmentname from dpt_department where departmentid='"+dptid+"'"; //获取唯一id String dptName = dbm.executeQueryString(str); fileName=dptName+"部门安全可控清单汇总"+"_"+userid+"_"+names+".xls"; //创建sheet页,并写入内容 createSheet(dbm,wb,getCardInfo(dbm,quarter,dptid)); }catch(Exception e){ e.printStackTrace(); }finally{ dbm.closeConnection(); } File ff = new File(ourl); if (ff.exists()) { ff.delete(); } fos = new FileOutputStream(ourl); wb.write(fos); fos.close(); String u = "/project/system/fileAction.do?filePath=" + URLEncoder.encode(ourl) + "&fileName=" + URLEncoder.encode(fileName); response.sendRedirect(u); } catch (Exception e) { e.printStackTrace(); }
第二步:创建sheet页签
public void createSheet(DBManager dbm,HSSFWorkbook w,Vector vt) throws Exception{ for(int i=0;i<vt.size();i++){ Hashtable ht = (Hashtable)vt.get(i); String id = (String)ht.get("id"); String quarter = (String)ht.get("quarter"); HSSFSheet sheet = w.createSheet("安全可控清单"); //写入数据 wirteSheet(dbm,sheet,w,id,quarter); } }
我这里页签是固定的名称
可根据自己的需要根据参数来进行判断页签。如果多个页签的话 可以这样:
public void createSheet(DBManager dbm,HSSFWorkbook w,Vector vt) throws Exception{ Hashtable temp = (Hashtable)vt.get(0); String id = (String)temp.get("id"); String quarter = (String)temp.get("quarter"); System.out.println("DumpExcel.jsp id"+id+"quarter:"+quarter); //查询得到当前模板对应的页签 String sheets = "select a7 from a_templet_col_num where templet_id='"+id+"' group by a7 order by a7 "; Vector sheetsVc = dbm.executeQueryVector3LowerCase(sheets.toString()); if (sheetsVc != null && sheetsVc.size() > 0) { for (int i = 0; i < sheetsVc.size(); i++) { Hashtable ht = (Hashtable) sheetsVc.get(i); System.out.println("导出的页签:ht"+ht.get("a7")); HSSFSheet sheet = w.createSheet(ht.get("a7").toString()); //写入数据 wirteSheet(dbm,sheet,w,id,quarter,ht.get("a7").toString()); } } }
此处的a7 就是页签的名称 在数据库里有对应。此处id是根据另一个方法里查询的!
多个页签样式
请注意第一处代码处:createSheet()方法
createSheet()方法中调用getCardInfo()方法 此方法就是返回你部门的数据。
public Vector getCardInfo(DBManager dbm,String quarter,String departmentid) throws Exception{ String sql = "select id,quarter from a_templet where quarter= "+quarter+" and department="+departmentid; Vector vc = dbm.executeQueryVector3LowerCase(sql); return vc; }
此处可根据需要来进行返回,不做多解释!
第三步:写入数据
每一个页签都会有不同的数据,在创建页签时就会对该页签写入数据。循环操作!
31.创建表头
我此处的数据不存在数据库我是固定的。list命名方式自己定义。我这里定义的意义代表他是报表的第几行数据 col是跨几列属性 可根据自己习惯来进行定义
//第一列数据
List<Map<String, Object>> listOne = new ArrayList<Map<String, Object>>();
Hashtable htss = new Hashtable(); htss.put("group_name", +year+"年第"+ji+"季度信息技术情况调研表"); htss.put("col", "10"); listOne.add(htss);
第二列这里的参数col_name 是为了跟数据库的属性进行对比取值。
//第二列数据 Hashtable tweDump = new Hashtable(); tweDump.put("show_name", "代码"); tweDump.put("col_name", "a1");; listTwe.add(tweDump); Hashtable tweDump0 = new Hashtable(); tweDump0.put("show_name", "代码"); tweDump0.put("col_name", "a2");; listTwe.add(tweDump0); Hashtable tweDump1 = new Hashtable(); tweDump1.put("show_name", "名称"); tweDump1.put("col_name", "a3");; listTwe.add(tweDump1); Hashtable tweDump2 = new Hashtable(); tweDump2.put("show_name", "厂商名称"); tweDump2.put("col_name", "a4");; listTwe.add(tweDump2); Hashtable tweDump3 = new Hashtable(); tweDump3.put("show_name", "厂商性质"); tweDump3.put("col_name", "a5");; listTwe.add(tweDump3); Hashtable tweDump4 = new Hashtable(); tweDump4.put("show_name", "厂商外资国别"); tweDump4.put("col_name", "a6");; listTwe.add(tweDump4); Hashtable tweDump5 = new Hashtable(); tweDump5.put("show_name", "2017年1季度末总数"); tweDump5.put("col_name", "a7");; listTwe.add(tweDump5); Hashtable tweDump6 = new Hashtable(); tweDump6.put("show_name", "2017年2季度新增数量"); tweDump6.put("col_name", "tbsl");; listTwe.add(tweDump6); Hashtable tweDump7 = new Hashtable(); tweDump7.put("show_name", "2017年2季度新增投入金额(万元)"); tweDump7.put("col_name", "tbje");; listTwe.add(tweDump7); Hashtable tweDump8 = new Hashtable(); tweDump8.put("show_name", "备注"); tweDump8.put("col_name", "a8");; listTwe.add(tweDump8);
第三列。这里下面的循环主要是为了报表上 跨行列跨行显示条线,不多解释
//第三列数据 Hashtable Tree = new Hashtable(); Tree.put("show_name", "大类"); Tree.put("col_name", "1");; listTree.add(Tree); Hashtable Tree1 = new Hashtable(); Tree1.put("show_name", "小类"); Tree1.put("col_name", "2");; for(int i=0;i<9;i++){ listTree.add(Tree1); }
插入数据:这里需要进行查询数据库操作 。这里我不合并到一起是有原因的。因为每个大类上面有个类别样式
所以我需要这样做判断。
//插入的数据 List<Map<String,Object>> listA = new ArrayList<Map<String,Object>>(); List<Map<String,Object>> listB = new ArrayList<Map<String,Object>>(); List<Map<String,Object>> listC = new ArrayList<Map<String,Object>>(); List<Map<String,Object>> listD = new ArrayList<Map<String,Object>>(); List<Map<String,Object>> listE = new ArrayList<Map<String,Object>>(); List<Map<String,Object>> listF = new ArrayList<Map<String,Object>>(); List<Map<String,Object>> listG = new ArrayList<Map<String,Object>>(); List<Map<String,Object>> listH = new ArrayList<Map<String,Object>>(); List<Map<String,Object>> listI = new ArrayList<Map<String,Object>>(); List<Map<String,Object>> listJ = new ArrayList<Map<String,Object>>(); System.out.println("templetid:"+templetid+"--time:"+time); //查询数据 String sql="select t1.*,t2.*,t3.tbjd,t3.tbje,t3.tbsl from (select * from a_templet_safe_control_colnum where templet_id='"+templetid+"' order by A2) t1 left join (select A2,count(*) as counts from a_templet_safe_control_colnum where templet_id='"+templetid+"' group by A2) t2 on t1.A2=t2.A2 left join (select * from a_templet_safe_control_colval where tbjd='"+time+"') t3 on t1.id=t3.templet_num_id where 1=1 "; for(int i=0;i<10;i++){ Vector var =null; switch(i){ case 0: var=dbm.executeQueryVector3LowerCase(sql.toString()+" and t1.a1='A' "); break; case 1: var=dbm.executeQueryVector3LowerCase(sql.toString()+" and t1.a1='B' "); break; case 2: var=dbm.executeQueryVector3LowerCase(sql.toString()+" and t1.a1='C' "); break; case 3: var=dbm.executeQueryVector3LowerCase(sql.toString()+" and t1.a1='D' "); break; case 4: var=dbm.executeQueryVector3LowerCase(sql.toString()+" and t1.a1='E' "); break; case 5: var=dbm.executeQueryVector3LowerCase(sql.toString()+" and t1.a1='F' "); break; case 6: var=dbm.executeQueryVector3LowerCase(sql.toString()+" and t1.a1='G' "); break; case 7: var=dbm.executeQueryVector3LowerCase(sql.toString()+" and t1.a1='H' "); break; case 8: var=dbm.executeQueryVector3LowerCase(sql.toString()+" and t1.a1='I' "); break; case 9: var=dbm.executeQueryVector3LowerCase(sql.toString()+" and t1.a1='J' "); break; }
if (var != null && var.size() > 0) { for (int j = 0; j < var.size(); j++) { Hashtable ht = (Hashtable) var.get(j); switch(i){ case 0: listA.add(ht); break; case 1: listB.add(ht); break; case 2: listC.add(ht); break; case 3: listD.add(ht); break; case 4: listE.add(ht); break; case 5: listF.add(ht); break; case 6: listG.add(ht); break; case 7: listH.add(ht); break; case 8: listI.add(ht); break; case 9: listJ.add(ht); break; } } }
把数据添加到对应的list中
创建表头开始:这里的前三列是固定的可根据自己需求来修改
//配置显示的固定列数 int col_num=9; //创建表头开始 HSSFRow row0 = sheet.createRow(0); HSSFRow row1 = sheet.createRow(1); HSSFRow row2 = sheet.createRow(2); for(int j=0;j<col_num;j++){ HSSFCellStyle s = getTitleStyle(w,2); HSSFCell cell0 = row0.createCell(j); HSSFCell cell1 = row1.createCell(j); HSSFCell cell2 = row1.createCell(j); cell0.setCellStyle(s); cell1.setCellStyle(s); cell2.setCellStyle(s); } int startCol=0; for(int i=0;i<listOne.size();i++){ Hashtable ht = (Hashtable)listOne.get(i); String group_name = (String)ht.get("group_name"); int colspan =Integer.parseInt((String)ht.get("col")); sheet.getRow(0).setHeight((short)600);//设置列高 HcreateCell(sheet, row0, w, startCol, group_name, 0, 0, startCol, (startCol+colspan-1),0); startCol+=colspan; } startCol=0; sheet.getRow(1).setHeight((short)500);//设置列高 sheet.getRow(2).setHeight((short)500);//设置列高 for(int i=0;i<listTwe.size();i++){ Hashtable ht = (Hashtable)listTwe.get(i); String show_name = (String)ht.get("show_name"); //System.out.println("i==="+i+"--"+ht.get("show_name")); sheet.setColumnWidth((short)i, (short)4000);//设置列宽 if(i==0){ HcreateCell(sheet, row1, w, startCol, show_name, 1, 1, startCol, 1,i); }else{ HcreateCell(sheet, row1, w, startCol, show_name, 1, 2, startCol, startCol,i); } startCol++; } startCol=0; for(int i=0;i<listTree.size();i++){ Hashtable ht = (Hashtable)listTree.get(i); String show_name = (String)ht.get("show_name"); //System.out.println("i==="+i+"--"+ht.get("show_name")); if(i==1||i==0){ sheet.setColumnWidth((short)i, (short)2000);//设置列宽 } HcreateCell(sheet, row2, w, startCol, show_name, 2, 2, startCol, startCol, i); HcreateCell(sheet, row2, w, startCol, show_name, 2, 2, startCol, startCol, i); startCol++; } //表头结束
固定值添加完成,开始数据库的值
//写入数据 HSSFRow row=null; //样式颜色 HSSFCellStyle s = getCellStyle(w,1); HSSFCellStyle r = getCellStyle(w,2); HSSFCellStyle y = getCellStyle(w,3); HSSFCellStyle g = getCellStyle(w,4); int rowspan=3; System.out.println("rowspan==="+rowspan); if(listA.size()>0){ for(int j=0;j<listA.size()+1;j++){ row =sheet.createRow(j+3); for(int col=0;col<col_num;col++){ HSSFCell cell = row.createCell(col); cell.setCellStyle(s); } } for(int j=0;j<listA.size();j++){ int nums=0; for(int k=0;k<j;k++){ //System.out.println(listA.get(k).get("a1")+"---"+listA.get(j).get("a1")); if(listA.get(k).get("a1").equals(listA.get(j).get("a1"))){ nums+=1; } } if(j==0){ //System.out.println("列高rowspan==="+rowspan); sheet.getRow(rowspan).setHeight((short)1000);//设置列高 createCell(sheet, sheet.getRow(rowspan), w, g, 0, "A", rowspan, rowspan, 0, 0); createCell(sheet, sheet.getRow(rowspan), w, g, 1, "", rowspan, rowspan, 1, 1); createCell(sheet, sheet.getRow(rowspan), w, g, 2, "计算机设备", rowspan, rowspan, 2, 2); createCell(sheet, sheet.getRow(rowspan), w, g, 3, "", rowspan, rowspan, 3, 9); rowspan++; } //System.out.println("列高rowspan==="+rowspan); sheet.getRow(rowspan).setHeight((short)500);//设置列高 for(int k=0;k<listTwe.size();k++){ //System.out.println("值:"+listA.get(j).get(listTwe.get(k).get("col_name"))==null?"":listA.get(j).get(listTwe.get(k).get("col_name"))); //第二行 if(k==0){ //System.out.println("j====="+j+"--"+listA.get(j).get("counts")+"rowspan:"+rowspan+"ID:"+listA.get(j).get("id")); createCell(sheet, sheet.getRow(rowspan), w, s, k, listA.get(j).get(listTwe.get(k).get("col_name"))==null?"":listA.get(j).get(listTwe.get(k).get("col_name")), rowspan, (listA.size()+3), k, k); }else if(k==1||k==2){ createCell(sheet, sheet.getRow(rowspan), w, s, k, listA.get(j).get(listTwe.get(k).get("col_name"))==null?"":listA.get(j).get(listTwe.get(k).get("col_name")), rowspan, rowspan+Integer.parseInt(listA.get(j).get("counts")+"")-1, k, k); //第二列 }else{ createCell(sheet, sheet.getRow(rowspan), w, s, k, listA.get(j).get(listTwe.get(k).get("col_name"))==null?"":listA.get(j).get(listTwe.get(k).get("col_name")), rowspan, rowspan, k, k); } } rowspan++; } }
我这里做的判断是 刚进入循环代表循环有值时 打印出类别,
打印类别记得rowspan++操作。因为类别没有在数据库里。如果不做该操作 则会打印时最后一条数据打印不了。因为位置被占了!
然后在进行循环listTwe第二列的数据 这时候刚才定义的col_name用得上了。循环listA的值看哪个能对应col_name则输出!
K==0进行判断 k代表 第几列 第一列要跨当前类的所有行,只打印一次。循环完之后进行rowspan++操作 ,让下次循环知道是第几行的,不会覆盖当前行
一下的listB ...listJ 的类似
最后还有样式:因为需求需要我在定义样式的时候传入值 num 根据num进行打印不同的背景颜色。可根据需求进行调整
public static HSSFCellStyle getCellStyle(HSSFWorkbook wb,int num) { HSSFCellStyle cellStyle = wb.createCellStyle(); cellStyle.setWrapText(true); if(num==1){ cellStyle.setFillForegroundColor(HSSFColor.WHITE.index); }else if(num==2){ cellStyle.setFillForegroundColor(HSSFColor.RED.index); }else if(num==3){ cellStyle.setFillForegroundColor(HSSFColor.YELLOW.index); }else if(num==4){ cellStyle.setFillForegroundColor(HSSFColor.GREEN.index); } cellStyle.setFillPattern(HSSFCellStyle.BORDER_THIN); cellStyle.setBorderBottom((short) 1); cellStyle.setBorderLeft((short) 1); cellStyle.setBorderRight((short) 1); cellStyle.setBorderTop((short) 1); cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 上下居中 cellStyle.setBottomBorderColor(HSSFColor.GREY_80_PERCENT.index); cellStyle.setLeftBorderColor(HSSFColor.GREY_80_PERCENT.index); cellStyle.setRightBorderColor(HSSFColor.GREY_80_PERCENT.index); cellStyle.setTopBorderColor(HSSFColor.GREY_80_PERCENT.index); cellStyle.setFont(getContentFont(wb,2)); cellStyle.setLocked(false); return cellStyle; }
打印的字体样式: 根据自己的需求来进行修改。
public static HSSFFont getContentFont(HSSFWorkbook wb,int i) { HSSFFont fontStyle = wb.createFont(); fontStyle.setFontName("微软雅黑"); if(i==1){ fontStyle.setFontHeightInPoints((short) 16); }else if(i==2){ fontStyle.setFontHeightInPoints((short) 9); } fontStyle.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL); fontStyle.setColor(HSSFColor.GREY_80_PERCENT.index); return fontStyle; }
java引用包
<%@page contentType="text/html; charset=GBK"%> <%@page import="java.net.URLEncoder"%> <%@page import="java.io.File"%> <%@page import="java.io.FileOutputStream"%> <%@page import="java.util.*"%> <%@page import="java.text.SimpleDateFormat"%> <%@page import="java.text.DecimalFormat"%> <%@page import="java.math.BigDecimal"%> <%@page import="org.apache.poi.hssf.usermodel.*"%> <%@page import="org.apache.poi.hssf.util.*"%>
到这,也就完成了导出操作!
有什么不懂得可以一起探讨,有比我更便捷的方法或方式,请告知!
完整代码就不贴了,太多。
转载请注明出处:http://www.cnblogs.com/huole/p/6141814.html