[转]POI 读取 Excel 转 HTML 支持 03xls 和 07xlsx 版本包含样式

工作需求：

　　提供EXCEL模板上传后预览；EXCEL解析成终端风格HTML。
处理方案：

　　POI解析EXCEL，预览时尽量获取原有表格的样式；终端使用EXCEL解析的无样式HTML，然后通过jQuery添加CSS样式
遇到问题：

　　CSDN上大牛处理03版xls格式的有成功例子；但是07版xlsx格式的样式处理未找到理想中的例子
下文是参考大牛的例子整理后的程序供参考！
EXCEL表格07xlsx格式
通过POI解析带样式的效果
项目JAR文件注意版本
JAVA
  1 package com.hboy.exceltohtml;
  2 
  3 import java.io.File;
  4 import java.io.FileInputStream;
  5 import java.io.IOException;
  6 import java.io.InputStream;
  7 import java.text.DecimalFormat;
  8 import java.text.SimpleDateFormat;
  9 import java.util.Date;
 10 import java.util.HashMap;
 11 import java.util.Map;
 12 import org.apache.poi.hssf.usermodel.HSSFCellStyle;
 13 import org.apache.poi.hssf.usermodel.HSSFDataFormat;
 14 import org.apache.poi.hssf.usermodel.HSSFDateUtil;
 15 import org.apache.poi.hssf.usermodel.HSSFFont;
 16 import org.apache.poi.hssf.usermodel.HSSFPalette;
 17 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 18 import org.apache.poi.hssf.util.HSSFColor;
 19 import org.apache.poi.ss.usermodel.Cell;
 20 import org.apache.poi.ss.usermodel.CellStyle;
 21 import org.apache.poi.ss.usermodel.Row;
 22 import org.apache.poi.ss.usermodel.Sheet;
 23 import org.apache.poi.ss.usermodel.Workbook;
 24 import org.apache.poi.ss.usermodel.WorkbookFactory;
 25 import org.apache.poi.ss.util.CellRangeAddress;
 26 import org.apache.poi.xssf.usermodel.XSSFCellStyle;
 27 import org.apache.poi.xssf.usermodel.XSSFColor;
 28 import org.apache.poi.xssf.usermodel.XSSFFont;
 29 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 30 
 31 /**
 32  * @功能描述 POI 读取 Excel 转 HTML 支持 03xls 和 07xlsx 版本  包含样式
 33  * @author Devil
 34  * @创建时间 2015/4/19 21:34
 35  */
 36 public class POIReadExcelToHtml {
 37 
 38     /**
 39      * 测试
 40      * @param args
 41      */
 42     public static void main(String[] args) {
 43         
 44         String path = "E://Microsoft Excel 工作表.xlsx";//E://Microsoft Excel 工作表.xlsx
 45         InputStream is = null;
 46         String htmlExcel = null;
 47         try {
 48             File sourcefile = new File(path);
 49             is = new FileInputStream(sourcefile);
 50             Workbook wb = WorkbookFactory.create(is);//此WorkbookFactory在POI-3.10版本中使用需要添加dom4j
 51             if (wb instanceof XSSFWorkbook) {
 52                 XSSFWorkbook xWb = (XSSFWorkbook) wb;
 53                 htmlExcel = POIReadExcelToHtml.getExcelInfo(xWb,true);
 54             }else if(wb instanceof HSSFWorkbook){
 55                 HSSFWorkbook hWb = (HSSFWorkbook) wb;
 56                 htmlExcel = POIReadExcelToHtml.getExcelInfo(hWb,true);
 57             }
 58             System.out.println(htmlExcel);
 59         } catch (Exception e) {
 60             e.printStackTrace();
 61         }finally{
 62             try {
 63                 is.close();
 64             } catch (IOException e) {
 65                 e.printStackTrace();
 66             }
 67         }
 68 
 69     }
 70     
 71     
 72     /**
 73      * 程序入口方法
 74      * @param filePath 文件的路径
 75      * @param isWithStyle 是否需要表格样式 包含 字体 颜色 边框 对齐方式
 76      * @return <table>...</table> 字符串
 77      */
 78     public String readExcelToHtml(String filePath , boolean isWithStyle){
 79         
 80         InputStream is = null;
 81         String htmlExcel = null;
 82         try {
 83             File sourcefile = new File(filePath);
 84             is = new FileInputStream(sourcefile);
 85             Workbook wb = WorkbookFactory.create(is);
 86             if (wb instanceof XSSFWorkbook) {
 87                 XSSFWorkbook xWb = (XSSFWorkbook) wb;
 88                 htmlExcel = POIReadExcelToHtml.getExcelInfo(xWb,isWithStyle);
 89             }else if(wb instanceof HSSFWorkbook){
 90                 HSSFWorkbook hWb = (HSSFWorkbook) wb;
 91                 htmlExcel = POIReadExcelToHtml.getExcelInfo(hWb,isWithStyle);
 92             }
 93         } catch (Exception e) {
 94             e.printStackTrace();
 95         }finally{
 96             try {
 97                 is.close();
 98             } catch (IOException e) {
 99                 e.printStackTrace();
100             }
101         }
102         return htmlExcel;
103     }
104     
105     
106     
107     public static String getExcelInfo(Workbook wb,boolean isWithStyle){
108         
109         StringBuffer sb = new StringBuffer();
110         Sheet sheet = wb.getSheetAt(0);//获取第一个Sheet的内容
111         int lastRowNum = sheet.getLastRowNum();
112         Map<String, String> map[] = getRowSpanColSpanMap(sheet);
113         sb.append("<table style='border-collapse:collapse;' width='100%'>");
114         Row row = null;        //兼容
115         Cell cell = null;    //兼容
116         
117         for (int rowNum = sheet.getFirstRowNum(); rowNum <= lastRowNum; rowNum++) {
118             row = sheet.getRow(rowNum);
119             if (row == null) {
120                 sb.append("<tr><td > &nbsp;</td></tr>");
121                 continue;
122             }
123             sb.append("<tr>");
124             int lastColNum = row.getLastCellNum();
125             for (int colNum = 0; colNum < lastColNum; colNum++) {
126                 cell = row.getCell(colNum);
127                 if (cell == null) {    //特殊情况 空白的单元格会返回null
128                     sb.append("<td>&nbsp;</td>");
129                     continue;
130                 }
131 
132                 String stringValue = getCellValue(cell);
133                 if (map[0].containsKey(rowNum + "," + colNum)) {
134                     String pointString = map[0].get(rowNum + "," + colNum);
135                     map[0].remove(rowNum + "," + colNum);
136                     int bottomeRow = Integer.valueOf(pointString.split(",")[0]);
137                     int bottomeCol = Integer.valueOf(pointString.split(",")[1]);
138                     int rowSpan = bottomeRow - rowNum + 1;
139                     int colSpan = bottomeCol - colNum + 1;
140                     sb.append("<td rowspan= '" + rowSpan + "' colspan= '"+ colSpan + "' ");
141                 } else if (map[1].containsKey(rowNum + "," + colNum)) {
142                     map[1].remove(rowNum + "," + colNum);
143                     continue;
144                 } else {
145                     sb.append("<td ");
146                 }
147                 
148                 //判断是否需要样式
149                 if(isWithStyle){
150                     dealExcelStyle(wb, sheet, cell, sb);//处理单元格样式
151                 }
152                 
153                 sb.append(">");
154                 if (stringValue == null || "".equals(stringValue.trim())) {
155                     sb.append(" &nbsp; ");
156                 } else {
157                     // 将ascii码为160的空格转换为html下的空格（&nbsp;）
158                     sb.append(stringValue.replace(String.valueOf((char) 160),"&nbsp;"));
159                 }
160                 sb.append("</td>");
161             }
162             sb.append("</tr>");
163         }
164 
165         sb.append("</table>");
166         return sb.toString();
167     }
168     
169     private static Map<String, String>[] getRowSpanColSpanMap(Sheet sheet) {
170 
171         Map<String, String> map0 = new HashMap<String, String>();
172         Map<String, String> map1 = new HashMap<String, String>();
173         int mergedNum = sheet.getNumMergedRegions();
174         CellRangeAddress range = null;
175         for (int i = 0; i < mergedNum; i++) {
176             range = sheet.getMergedRegion(i);
177             int topRow = range.getFirstRow();
178             int topCol = range.getFirstColumn();
179             int bottomRow = range.getLastRow();
180             int bottomCol = range.getLastColumn();
181             map0.put(topRow + "," + topCol, bottomRow + "," + bottomCol);
182             // System.out.println(topRow + "," + topCol + "," + bottomRow + "," + bottomCol);
183             int tempRow = topRow;
184             while (tempRow <= bottomRow) {
185                 int tempCol = topCol;
186                 while (tempCol <= bottomCol) {
187                     map1.put(tempRow + "," + tempCol, "");
188                     tempCol++;
189                 }
190                 tempRow++;
191             }
192             map1.remove(topRow + "," + topCol);
193         }
194         Map[] map = { map0, map1 };
195         return map;
196     }
197     
198     
199     /**
200      * 获取表格单元格Cell内容
201      * @param cell
202      * @return
203      */
204     private static String getCellValue(Cell cell) {
205 
206         String result = new String();  
207         switch (cell.getCellType()) {  
208         case Cell.CELL_TYPE_NUMERIC:// 数字类型  
209             if (HSSFDateUtil.isCellDateFormatted(cell)) {// 处理日期格式、时间格式  
210                 SimpleDateFormat sdf = null;  
211                 if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {  
212                     sdf = new SimpleDateFormat("HH:mm");  
213                 } else {// 日期  
214                     sdf = new SimpleDateFormat("yyyy-MM-dd");  
215                 }  
216                 Date date = cell.getDateCellValue();  
217                 result = sdf.format(date);  
218             } else if (cell.getCellStyle().getDataFormat() == 58) {  
219                 // 处理自定义日期格式：m月d日(通过判断单元格的格式id解决，id的值是58)  
220                 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");  
221                 double value = cell.getNumericCellValue();  
222                 Date date = org.apache.poi.ss.usermodel.DateUtil  
223                         .getJavaDate(value);  
224                 result = sdf.format(date);  
225             } else {  
226                 double value = cell.getNumericCellValue();  
227                 CellStyle style = cell.getCellStyle();  
228                 DecimalFormat format = new DecimalFormat();  
229                 String temp = style.getDataFormatString();  
230                 // 单元格设置成常规  
231                 if (temp.equals("General")) {  
232                     format.applyPattern("#");  
233                 }  
234                 result = format.format(value);  
235             }  
236             break;  
237         case Cell.CELL_TYPE_STRING:// String类型  
238             result = cell.getRichStringCellValue().toString();  
239             break;  
240         case Cell.CELL_TYPE_BLANK:  
241             result = "";  
242             break; 
243         default:  
244             result = "";  
245             break;  
246         }  
247         return result;  
248     }
249     
250     /**
251      * 处理表格样式
252      * @param wb
253      * @param sheet
254      * @param cell
255      * @param sb
256      */
257     private static void dealExcelStyle(Workbook wb,Sheet sheet,Cell cell,StringBuffer sb){
258         
259         CellStyle cellStyle = cell.getCellStyle();
260         if (cellStyle != null) {
261             short alignment = cellStyle.getAlignment();
262             sb.append("align='" + convertAlignToHtml(alignment) + "' ");//单元格内容的水平对齐方式
263             short verticalAlignment = cellStyle.getVerticalAlignment();
264             sb.append("valign='"+ convertVerticalAlignToHtml(verticalAlignment)+ "' ");//单元格中内容的垂直排列方式
265             
266             if (wb instanceof XSSFWorkbook) {
267                             
268                 XSSFFont xf = ((XSSFCellStyle) cellStyle).getFont(); 
269                 short boldWeight = xf.getBoldweight();
270                 sb.append("style='");
271                 sb.append("font-weight:" + boldWeight + ";"); // 字体加粗
272                 sb.append("font-size: " + xf.getFontHeight() / 2 + "%;"); // 字体大小
273                 int columnWidth = sheet.getColumnWidth(cell.getColumnIndex()) ;
274                 sb.append("" + columnWidth + "px;");
275                 
276                 XSSFColor xc = xf.getXSSFColor();
277                 if (xc != null && !"".equals(xc)) {
278                     sb.append("color:#" + xc.getARGBHex().substring(2) + ";"); // 字体颜色
279                 }
280                 
281                 XSSFColor bgColor = (XSSFColor) cellStyle.getFillForegroundColorColor();
282                 //System.out.println("************************************");
283                 //System.out.println("BackgroundColorColor: "+cellStyle.getFillBackgroundColorColor());
284                 //System.out.println("ForegroundColor: "+cellStyle.getFillForegroundColor());//0
285                 //System.out.println("BackgroundColorColor: "+cellStyle.getFillBackgroundColorColor());
286                 //System.out.println("ForegroundColorColor: "+cellStyle.getFillForegroundColorColor());
287                 //String bgColorStr = bgColor.getARGBHex();
288                 //System.out.println("bgColorStr: "+bgColorStr);
289                 if (bgColor != null && !"".equals(bgColor)) {
290                     sb.append("background-color:#" + bgColor.getARGBHex().substring(2) + ";"); // 背景颜色
291                 }
292                 sb.append(getBorderStyle(0,cellStyle.getBorderTop(), ((XSSFCellStyle) cellStyle).getTopBorderXSSFColor()));
293                 sb.append(getBorderStyle(1,cellStyle.getBorderRight(), ((XSSFCellStyle) cellStyle).getRightBorderXSSFColor()));
294                 sb.append(getBorderStyle(2,cellStyle.getBorderBottom(), ((XSSFCellStyle) cellStyle).getBottomBorderXSSFColor()));
295                 sb.append(getBorderStyle(3,cellStyle.getBorderLeft(), ((XSSFCellStyle) cellStyle).getLeftBorderXSSFColor()));
296                     
297             }else if(wb instanceof HSSFWorkbook){
298                 
299                 HSSFFont hf = ((HSSFCellStyle) cellStyle).getFont(wb);
300                 short boldWeight = hf.getBoldweight();
301                 short fontColor = hf.getColor();
302                 sb.append("style='");
303                 HSSFPalette palette = ((HSSFWorkbook) wb).getCustomPalette(); // 类HSSFPalette用于求的颜色的国际标准形式
304                 HSSFColor hc = palette.getColor(fontColor);
305                 sb.append("font-weight:" + boldWeight + ";"); // 字体加粗
306                 sb.append("font-size: " + hf.getFontHeight() / 2 + "%;"); // 字体大小
307                 String fontColorStr = convertToStardColor(hc);
308                 if (fontColorStr != null && !"".equals(fontColorStr.trim())) {
309                     sb.append("color:" + fontColorStr + ";"); // 字体颜色
310                 }
311                 int columnWidth = sheet.getColumnWidth(cell.getColumnIndex()) ;
312                 sb.append("" + columnWidth + "px;");
313                 short bgColor = cellStyle.getFillForegroundColor();
314                 hc = palette.getColor(bgColor);
315                 String bgColorStr = convertToStardColor(hc);
316                 if (bgColorStr != null && !"".equals(bgColorStr.trim())) {
317                     sb.append("background-color:" + bgColorStr + ";"); // 背景颜色
318                 }
319                 sb.append( getBorderStyle(palette,0,cellStyle.getBorderTop(),cellStyle.getTopBorderColor()));
320                 sb.append( getBorderStyle(palette,1,cellStyle.getBorderRight(),cellStyle.getRightBorderColor()));
321                 sb.append( getBorderStyle(palette,3,cellStyle.getBorderLeft(),cellStyle.getLeftBorderColor()));
322                 sb.append( getBorderStyle(palette,2,cellStyle.getBorderBottom(),cellStyle.getBottomBorderColor()));
323             }
324 
325             sb.append("' ");
326         }
327     }
328     
329     /**
330      * 单元格内容的水平对齐方式
331      * @param alignment
332      * @return
333      */
334     private static String convertAlignToHtml(short alignment) {
335 
336         String align = "left";
337         switch (alignment) {
338         case CellStyle.ALIGN_LEFT:
339             align = "left";
340             break;
341         case CellStyle.ALIGN_CENTER:
342             align = "center";
343             break;
344         case CellStyle.ALIGN_RIGHT:
345             align = "right";
346             break;
347         default:
348             break;
349         }
350         return align;
351     }
352 
353     /**
354      * 单元格中内容的垂直排列方式
355      * @param verticalAlignment
356      * @return
357      */
358     private static String convertVerticalAlignToHtml(short verticalAlignment) {
359 
360         String valign = "middle";
361         switch (verticalAlignment) {
362         case CellStyle.VERTICAL_BOTTOM:
363             valign = "bottom";
364             break;
365         case CellStyle.VERTICAL_CENTER:
366             valign = "center";
367             break;
368         case CellStyle.VERTICAL_TOP:
369             valign = "top";
370             break;
371         default:
372             break;
373         }
374         return valign;
375     }
376     
377     private static String convertToStardColor(HSSFColor hc) {
378 
379         StringBuffer sb = new StringBuffer("");
380         if (hc != null) {
381             if (HSSFColor.AUTOMATIC.index == hc.getIndex()) {
382                 return null;
383             }
384             sb.append("#");
385             for (int i = 0; i < hc.getTriplet().length; i++) {
386                 sb.append(fillWithZero(Integer.toHexString(hc.getTriplet()[i])));
387             }
388         }
389 
390         return sb.toString();
391     }
392     
393     private static String fillWithZero(String str) {
394         if (str != null && str.length() < 2) {
395             return "0" + str;
396         }
397         return str;
398     }
399     
400     static String[] bordesr={"border-top:","border-right:","border-bottom:","border-left:"};
401     static String[] borderStyles={"solid ","solid ","solid ","solid ","solid ","solid ","solid ","solid ","solid ","solid","solid","solid","solid","solid"};
402 
403     private static  String getBorderStyle(  HSSFPalette palette ,int b,short s, short t){
404          
405         if(s==0)return  bordesr[b]+borderStyles[s]+"#d0d7e5 1px;";;
406         String borderColorStr = convertToStardColor( palette.getColor(t));
407         borderColorStr=borderColorStr==null|| borderColorStr.length()<1?"#000000":borderColorStr;
408         return bordesr[b]+borderStyles[s]+borderColorStr+" 1px;";
409         
410     }
411     
412     private static  String getBorderStyle(int b,short s, XSSFColor xc){
413          
414          if(s==0)return  bordesr[b]+borderStyles[s]+"#d0d7e5 1px;";;
415          if (xc != null && !"".equals(xc)) {
416              String borderColorStr = xc.getARGBHex();//t.getARGBHex();
417              borderColorStr=borderColorStr==null|| borderColorStr.length()<1?"#000000":borderColorStr.substring(2);
418              return bordesr[b]+borderStyles[s]+borderColorStr+" 1px;";
419          }
420          
421          return "";
422     }
423 
424 }
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原文地址：https://www.cnblogs.com/nicori/p/5484977.html
[转]POI 读取 Excel 转 HTML 支持 03xls 和 07xlsx 版本 包含样式

工作需求：

处理方案：

遇到问题：

[转]POI 读取 Excel 转 HTML 支持 03xls 和 07xlsx 版本包含样式
