首先说一下，本人发布的代码都是经过本人亲测，并且用在实际项目中。如果觉得可以，希望大家点个赞，谢谢大家。
有什么问题，大家评论出来，一起交流。好了，不废话了，下面来说一说这个东西怎么做。
网上也有许多版本，不过都不是我想要的，转出的html文件，要带表格，而且还能根据excel文件样式来生成html文件，不过太复杂的样式就支持不太强大了。
我采用poi去做这个功能，虽然还有jxl等其它方式，其它方式都有大的缺陷，有的不支持excel07版本，有的不能跨平台使用，这些都是很致命的缺点。
所以我采用poi去研究，我测试office和wps的excel版本都支持，并且兼容excel03及07以后版本，效果达到我的要求了，下面贴出源码，供大家一起学习。
jar包主要是这些 
1
import java.text.DecimalFormat; import java.text.SimpleDateFormat; import java.util.Date; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import org.apache.poi.hssf.usermodel.HSSFCellStyle; import org.apache.poi.hssf.usermodel.HSSFDataFormat; import org.apache.poi.hssf.usermodel.HSSFDateUtil; import org.apache.poi.hssf.usermodel.HSSFFont; import org.apache.poi.hssf.usermodel.HSSFPalette; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.hssf.util.HSSFColor; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.CellStyle; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.ss.usermodel.WorkbookFactory; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.xssf.usermodel.XSSFCellStyle; import org.apache.poi.xssf.usermodel.XSSFColor; import org.apache.poi.xssf.usermodel.XSSFFont; import org.apache.poi.xssf.usermodel.XSSFWorkbook;
/**
2
3 * @param filePath excel源文件文件的路径
4 * @param htmlPositon 生成的html文件的路径
5 * @param isWithStyle 是否需要表格样式 包含 字体 颜色 边框 对齐方式
6
7 */
8 public static String readExcelToHtml(String filePath ,String htmlPositon, boolean isWithStyle){
9
10 InputStream is = null;
11 String htmlExcel = null;
12 try {
13 File sourcefile = new File(filePath);
14 is = new FileInputStream(sourcefile);
15 Workbook wb = WorkbookFactory.create(is);
16 if (wb instanceof XSSFWorkbook) { //03版excel处理方法
17 XSSFWorkbook xWb = (XSSFWorkbook) wb;
18 htmlExcel = FileConverter.getExcelInfo(xWb,isWithStyle);
19 }else if(wb instanceof HSSFWorkbook){ //07及10版以后的excel处理方法
20 HSSFWorkbook hWb = (HSSFWorkbook) wb;
21 htmlExcel = FileConverter.getExcelInfo(hWb,isWithStyle);
22 }
23 writeFile(htmlExcel,htmlPositon);
24 } catch (Exception e) {
25 e.printStackTrace();
26 }finally{
27 try {
28 is.close();
29 } catch (IOException e) {
30 e.printStackTrace();
31 }
32 }
33 return htmlPositon;
34 }
35
36
37
38 private static String getExcelInfo(Workbook wb,boolean isWithStyle){
39
40 StringBuffer sb = new StringBuffer();
41 Sheet sheet = wb.getSheetAt(0);//获取第一个Sheet的内容
42 int lastRowNum = sheet.getLastRowNum();
43 Map<String, String> map[] = getRowSpanColSpanMap(sheet);
44 sb.append("<table style=‘border-collapse:collapse;‘ width=‘100%‘>");
45 Row row = null; //兼容
46 Cell cell = null; //兼容
47
48 for (int rowNum = sheet.getFirstRowNum(); rowNum <= lastRowNum; rowNum++) {
49 row = sheet.getRow(rowNum);
50 if (row == null) {
51 sb.append("<tr><td ><nobr> </nobr></td></tr>");
52 continue;
53 }
54 sb.append("<tr>");
55 int lastColNum = row.getLastCellNum();
56 for (int colNum = 0; colNum < lastColNum; colNum++) {
57 cell = row.getCell(colNum);
58 if (cell == null) { //特殊情况 空白的单元格会返回null
59 sb.append("<td> </td>");
60 continue;
61 }
62
63 String stringValue = getCellValue(cell);
64 if (map[0].containsKey(rowNum + "," + colNum)) {
65 String pointString = map[0].get(rowNum + "," + colNum);
66 map[0].remove(rowNum + "," + colNum);
67 int bottomeRow = Integer.valueOf(pointString.split(",")[0]);
68 int bottomeCol = Integer.valueOf(pointString.split(",")[1]);
69 int rowSpan = bottomeRow - rowNum + 1;
70 int colSpan = bottomeCol - colNum + 1;
71 sb.append("<td rowspan= ‘" + rowSpan + "‘ colspan= ‘"+ colSpan + "‘ ");
72 } else if (map[1].containsKey(rowNum + "," + colNum)) {
73 map[1].remove(rowNum + "," + colNum);
74 continue;
75 } else {
76 sb.append("<td ");
77 }
78
79 //判断是否需要样式
80 if(isWithStyle){
81 dealExcelStyle(wb, sheet, cell, sb);//处理单元格样式
82 }
83
84 sb.append("><nobr>");
85 if (stringValue == null || "".equals(stringValue.trim())) {
86 sb.append(" ");
87 } else {
88 // 将ascii码为160的空格转换为html下的空格（ ）
89 sb.append(stringValue.replace(String.valueOf((char) 160)," "));
90 }
91 sb.append("</nobr></td>");
92 }
93 sb.append("</tr>");
94 }
95
96 sb.append("</table>");
97 return sb.toString();
98 }
99
100 private static Map<String, String>[] getRowSpanColSpanMap(Sheet sheet) {
101
102 Map<String, String> map0 = new HashMap<String, String>();
103 Map<String, String> map1 = new HashMap<String, String>();
104 int mergedNum = sheet.getNumMergedRegions();
105 CellRangeAddress range = null;
106 for (int i = 0; i < mergedNum; i++) {
107 range = sheet.getMergedRegion(i);
108 int topRow = range.getFirstRow();
109 int topCol = range.getFirstColumn();
110 int bottomRow = range.getLastRow();
111 int bottomCol = range.getLastColumn();
112 map0.put(topRow + "," + topCol, bottomRow + "," + bottomCol);
113 // System.out.println(topRow + "," + topCol + "," + bottomRow + "," + bottomCol);
114 int tempRow = topRow;
115 while (tempRow <= bottomRow) {
116 int tempCol = topCol;
117 while (tempCol <= bottomCol) {
118 map1.put(tempRow + "," + tempCol, "");
119 tempCol++;
120 }
121 tempRow++;
122 }
123 map1.remove(topRow + "," + topCol);
124 }
125 Map[] map = { map0, map1 };
126 return map;
127 }
128
129
130 /**
131 * 获取表格单元格Cell内容
132 * @param cell
133 * @return
134 */
135 private static String getCellValue(Cell cell) {
136
137 String result = new String();
138 switch (cell.getCellType()) {
139 case Cell.CELL_TYPE_NUMERIC:// 数字类型
140 if (HSSFDateUtil.isCellDateFormatted(cell)) {// 处理日期格式、时间格式
141 SimpleDateFormat sdf = null;
142 if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {
143 sdf = new SimpleDateFormat("HH:mm");
144 } else {// 日期
145 sdf = new SimpleDateFormat("yyyy-MM-dd");
146 }
147 Date date = cell.getDateCellValue();
148 result = sdf.format(date);
149 } else if (cell.getCellStyle().getDataFormat() == 58) {
150 // 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)
151 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
152 double value = cell.getNumericCellValue();
153 Date date = org.apache.poi.ss.usermodel.DateUtil
154 .getJavaDate(value);
155 result = sdf.format(date);
156 } else {
157 double value = cell.getNumericCellValue();
158 CellStyle style = cell.getCellStyle();
159 DecimalFormat format = new DecimalFormat();
160 String temp = style.getDataFormatString();
161 // 单元格设置成常规
162 if (temp.equals("General")) {
163 format.applyPattern("#");
164 }
165 result = format.format(value);
166 }
167 break;
168 case Cell.CELL_TYPE_STRING:// String类型
169 result = cell.getRichStringCellValue().toString();
170 break;
171 case Cell.CELL_TYPE_BLANK:
172 result = "";
173 break;
174 default:
175 result = "";
176 break;
177 }
178 return result;
179 }
180
181 /**
182 * 处理表格样式
183 * @param wb
184 * @param sheet
185 * @param sb
186 */
187 private static void dealExcelStyle(Workbook wb,Sheet sheet,Cell cell,StringBuffer sb){
188
189 CellStyle cellStyle = cell.getCellStyle();
190 if (cellStyle != null) {
191 short alignment = cellStyle.getAlignment();
192 // sb.append("align=‘" + convertAlignToHtml(alignment) + "‘ ");//单元格内容的水平对齐方式
193 short verticalAlignment = cellStyle.getVerticalAlignment();
194 sb.append("valign=‘"+ convertVerticalAlignToHtml(verticalAlignment)+ "‘ ");//单元格中内容的垂直排列方式
195
196 if (wb instanceof XSSFWorkbook) {
197
198 XSSFFont xf = ((XSSFCellStyle) cellStyle).getFont();
199 short boldWeight = xf.getBoldweight();
200 String align = convertAlignToHtml(alignment);
201 sb.append("style=‘");
202 sb.append("font-weight:" + boldWeight + ";"); // 字体加粗
203 sb.append("font-size: " + xf.getFontHeight() / 2 + "%;"); // 字体大小
204 int columnWidth = sheet.getColumnWidth(cell.getColumnIndex()) ;
205 sb.append("width:" + columnWidth + "px;");
206 sb.append("text-align:" + align + ";");//表头排版样式
207 XSSFColor xc = xf.getXSSFColor();
208 if (xc != null && !"".equals(xc)) {
209 sb.append("color:#" + xc.getARGBHex().substring(2) + ";"); // 字体颜色
210 }
211
212 XSSFColor bgColor = (XSSFColor) cellStyle.getFillForegroundColorColor();
213 if (bgColor != null && !"".equals(bgColor)) {
214 sb.append("background-color:#" + bgColor.getARGBHex().substring(2) + ";"); // 背景颜色
215 }
216 sb.append(getBorderStyle(0,cellStyle.getBorderTop(), ((XSSFCellStyle) cellStyle).getTopBorderXSSFColor()));
217 sb.append(getBorderStyle(1,cellStyle.getBorderRight(), ((XSSFCellStyle) cellStyle).getRightBorderXSSFColor()));
218 sb.append(getBorderStyle(2,cellStyle.getBorderBottom(), ((XSSFCellStyle) cellStyle).getBottomBorderXSSFColor()));
219 sb.append(getBorderStyle(3,cellStyle.getBorderLeft(), ((XSSFCellStyle) cellStyle).getLeftBorderXSSFColor()));
220
221 }else if(wb instanceof HSSFWorkbook){
222
223 HSSFFont hf = ((HSSFCellStyle) cellStyle).getFont(wb);
224 short boldWeight = hf.getBoldweight();
225 short fontColor = hf.getColor();
226 sb.append("style=‘");
227 HSSFPalette palette = ((HSSFWorkbook) wb).getCustomPalette(); // 类HSSFPalette用于求的颜色的国际标准形式
228 HSSFColor hc = palette.getColor(fontColor);
229 sb.append("font-weight:" + boldWeight + ";"); // 字体加粗
230 sb.append("font-size: " + hf.getFontHeight() / 2 + "%;"); // 字体大小
231 String align = convertAlignToHtml(alignment);
232 sb.append("text-align:" + align + ";");//表头排版样式
233 String fontColorStr = convertToStardColor(hc);
234 if (fontColorStr != null && !"".equals(fontColorStr.trim())) {
235 sb.append("color:" + fontColorStr + ";"); // 字体颜色
236 }
237 int columnWidth = sheet.getColumnWidth(cell.getColumnIndex()) ;
238 sb.append("width:" + columnWidth + "px;");
239 short bgColor = cellStyle.getFillForegroundColor();
240 hc = palette.getColor(bgColor);
241 String bgColorStr = convertToStardColor(hc);
242 if (bgColorStr != null && !"".equals(bgColorStr.trim())) {
243 sb.append("background-color:" + bgColorStr + ";"); // 背景颜色
244 }
245 sb.append( getBorderStyle(palette,0,cellStyle.getBorderTop(),cellStyle.getTopBorderColor()));
246 sb.append( getBorderStyle(palette,1,cellStyle.getBorderRight(),cellStyle.getRightBorderColor()));
247 sb.append( getBorderStyle(palette,3,cellStyle.getBorderLeft(),cellStyle.getLeftBorderColor()));
248 sb.append( getBorderStyle(palette,2,cellStyle.getBorderBottom(),cellStyle.getBottomBorderColor()));
249 }
250
251 sb.append("‘ ");
252 }
253 }
254
255 /**
256 * 单元格内容的水平对齐方式
257 * @param alignment
258 * @return
259 */
260 private static String convertAlignToHtml(short alignment) {
261
262 String align = "center";
263 switch (alignment) {
264 case CellStyle.ALIGN_LEFT:
265 align = "left";
266 break;
267 case CellStyle.ALIGN_CENTER:
268 align = "center";
269 break;
270 case CellStyle.ALIGN_RIGHT:
271 align = "right";
272 break;
273 default:
274 break;
275 }
276 return align;
277 }
278
279 /**
280 * 单元格中内容的垂直排列方式
281 * @param verticalAlignment
282 * @return
283 */
284 private static String convertVerticalAlignToHtml(short verticalAlignment) {
285
286 String valign = "middle";
287 switch (verticalAlignment) {
288 case CellStyle.VERTICAL_BOTTOM:
289 valign = "bottom";
290 break;
291 case CellStyle.VERTICAL_CENTER:
292 valign = "center";
293 break;
294 case CellStyle.VERTICAL_TOP:
295 valign = "top";
296 break;
297 default:
298 break;
299 }
300 return valign;
301 }
302
303 private static String convertToStardColor(HSSFColor hc) {
304
305 StringBuffer sb = new StringBuffer("");
306 if (hc != null) {
307 if (HSSFColor.AUTOMATIC.index == hc.getIndex()) {
308 return null;
309 }
310 sb.append("#");
311 for (int i = 0; i < hc.getTriplet().length; i++) {
312 sb.append(fillWithZero(Integer.toHexString(hc.getTriplet()[i])));
313 }
314 }
315
316 return sb.toString();
317 }
318
319 private static String fillWithZero(String str) {
320 if (str != null && str.length() < 2) {
321 return "0" + str;
322 }
323 return str;
324 }
325
326 static String[] bordesr={"border-top:","border-right:","border-bottom:","border-left:"};
327 static String[] borderStyles={"solid ","solid ","solid ","solid ","solid ","solid ","solid ","solid ","solid ","solid","solid","solid","solid","solid"};
328
329 private static String getBorderStyle( HSSFPalette palette ,int b,short s, short t){
330
331 if(s==0)return bordesr[b]+borderStyles[s]+"#d0d7e5 1px;";;
332 String borderColorStr = convertToStardColor( palette.getColor(t));
333 borderColorStr=borderColorStr==null|| borderColorStr.length()<1?"#000000":borderColorStr;
334 return bordesr[b]+borderStyles[s]+borderColorStr+" 1px;";
335
336 }
337
338 private static String getBorderStyle(int b,short s, XSSFColor xc){
339
340 if(s==0)return bordesr[b]+borderStyles[s]+"#d0d7e5 1px;";;
341 if (xc != null && !"".equals(xc)) {
342 String borderColorStr = xc.getARGBHex();//t.getARGBHex();
343 borderColorStr=borderColorStr==null|| borderColorStr.length()<1?"#000000":borderColorStr.substring(2);
344 return bordesr[b]+borderStyles[s]+borderColorStr+" 1px;";
345 }
346
347 return "";
348 }
349 /*
350 * @param content 生成的excel表格标签
351 * @param htmlPath 生成的html文件地址
352 */
353 private static void writeFile(String content,String htmlPath){
354 File file2 = new File(htmlPath);
355 StringBuilder sb = new StringBuilder();
356 try {
357 file2.createNewFile();//创建文件
358
359 sb.append("<html><head><meta http-equiv=\"Content-Type\" content=\"text/html; charset=GBK\"><title>Html Test</title></head><body>");
360 sb.append("<div>");
361 sb.append(content);
362 sb.append("</div>");
363 sb.append("</body></html>");
364
365 PrintStream printStream = new PrintStream(new FileOutputStream(file2));
366
367 printStream.println(sb.toString());//将字符串写入文件
368
369 } catch (IOException e) {
370
371 e.printStackTrace();
372 }
373
374 }
375
376
大家如果有什么不懂的，希望大家提出来，一起交流，一起进步。
时间： 2024-10-14 20:36:20