正文
Excel转html工具类
提示：扫一扫查出行【扫一扫了解最新限行尾号】
复制提示
有时需要将Excel展示在页面上，所以需要将Excel转化为html，这里封装一个工具类。
Excel和servlet访问效果如下图示：
工具类代码：
POIReadExcelToHtmlUtil.java
package com.alphajuns.utils; import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.*;
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;
import org.junit.Test; import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.*; /**
* excel转化为html工具类
*/
public class POIReadExcelToHtmlUtil { @Test
public void run() {
String filePath = "F:\\Test1.xlsx";
boolean isWithStyle = true;
List<Map<String, String>> excelMapList = POIReadExcelToHtmlUtil.readExcelToHtml(filePath, isWithStyle);
System.out.println(excelMapList);
} /**
* excel转html入口
* @param filePath
* @param isWithStyle
* @return
*/
public static List<Map<String, String>> readExcelToHtml(String filePath, boolean isWithStyle) {
List<Map<String, String>> excelInfoMapList = null;
// 文件对象
File file = new File(filePath);
// 文件流
InputStream inputStream = null;
try {
inputStream = new FileInputStream(file);
// 创建工作簿
Workbook workbook = WorkbookFactory.create(inputStream);
// Excel类型
if (workbook instanceof HSSFWorkbook) {
//
HSSFWorkbook hssfWorkbook = (HSSFWorkbook) workbook;
// 获取Excel信息
excelInfoMapList = getExcelInfo(hssfWorkbook, isWithStyle);
} else if (workbook instanceof XSSFWorkbook) {
//
XSSFWorkbook xssfWorkbook = (XSSFWorkbook) workbook;
// 获取Excel信息
excelInfoMapList = getExcelInfo(xssfWorkbook, isWithStyle);
}
} catch (Exception e) {
e.printStackTrace();
} return excelInfoMapList;
} /**
* 获取Excel信息
* @param workbook
* @param isWithStyle
* @return
*/
private static List<Map<String, String>> getExcelInfo(Workbook workbook, boolean isWithStyle) {
List<Map<String, String>> htmlMapList = new ArrayList<Map<String, String>>();
// 获取所有sheet
int sheets = workbook.getNumberOfSheets();
// 遍历sheets
for (int sheetIndex = 0; sheetIndex < sheets; sheetIndex++) {
// 用于保存sheet信息
Map<String, String> sheetMap = new HashMap<String, String>();
// 获取sheet名
String sheetName = workbook.getSheetName(sheetIndex);
// 存储sheet名
sheetMap.put("sheetName", sheetName);
StringBuffer stringBuffer = new StringBuffer();
// 获取第一个sheet信息
Sheet sheet = workbook.getSheetAt(sheetIndex);
// 行数
int lastRowNum = sheet.getLastRowNum();
// 获取合并后的单元格行列坐标
Map<String, String> map[] = getRowSpanColSpan(sheet);
stringBuffer.append("<table style='border-collapse:collapse;' width='100%'>");
Row row = null;
Cell cell = null;
for (int rowNum = sheet.getFirstRowNum(); rowNum <= lastRowNum; rowNum++) {
// 获取行
row = sheet.getRow(rowNum);
// 空行
if (row == null) {
stringBuffer.append("<tr><td> </td></tr>");
continue;
}
stringBuffer.append("<tr>");
// 列数
short lastCellNum = row.getLastCellNum();
for (int colNum = 0; colNum <= lastCellNum; colNum++) {
// 获取列
cell = row.getCell(colNum);
// 空白单元格
if (cell == null) {
stringBuffer.append("<td> </td>");
continue;
}
// 获取列值
String cellValue = getCellValue(cell);
if (map[0].containsKey(rowNum + "," + colNum)) {
String point = map[0].get(rowNum + "," + colNum);
map[0].remove(rowNum + "," + colNum);
int bottomRow = Integer.valueOf(point.split(",")[0]);
int bottomCol = Integer.valueOf(point.split(",")[1]);
int rowSpan = bottomRow - rowNum + 1;
int colSpan = bottomCol - colNum + 1;
stringBuffer.append("<td rowspan= '" + rowSpan + "' colSpan= '" + colSpan + "' ");
} else if (map[1].containsKey(rowNum + "," + colNum)) {
map[1].remove(rowNum + "," + colNum);
continue;
} else {
stringBuffer.append("<td ");
} // 判断是否包含样式
if (isWithStyle) {
// 处理单元格样式
dealExcelStyle(workbook, sheet, cell, stringBuffer);
} stringBuffer.append(">");
if (cellValue == null || "".equals(cellValue.trim())) {
stringBuffer.append(" ");
} else {
stringBuffer.append(cellValue.replace(String.valueOf((char) 160), " "));
}
stringBuffer.append("</td>");
}
stringBuffer.append("</tr>");
if (rowNum > 500) {
stringBuffer.append("<tr><td>数据量太大，请下载Excel查看更多数据</td></tr>");
break;
}
}
stringBuffer.append("</table>");
sheetMap.put("content", stringBuffer.toString());
htmlMapList.add(sheetMap);
}
return htmlMapList;
} /**
* 获取列值
* @param cell
* @return
*/
private static String getCellValue(Cell cell) {
String result = new String();
switch(cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC: // 数字类型
if (HSSFDateUtil.isCellDateFormatted(cell)) {
SimpleDateFormat simpleDateFormat = null;
// 时间
if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {
simpleDateFormat = new SimpleDateFormat("HH:mm");
} else {
// 日期
simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
}
Date date = cell.getDateCellValue();
result = simpleDateFormat.format(date);
} else if (cell.getCellStyle().getDataFormat() == 58) {
// 处理自定义日期格式：m月d日（通过判断单元格格式的id解决，id值为58）
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
double value = cell.getNumericCellValue();
Date date = DateUtil.getJavaDate(value);
result = simpleDateFormat.format(date);
} else {
double value = cell.getNumericCellValue();
CellStyle cellStyle = cell.getCellStyle();
DecimalFormat decimalFormat = new DecimalFormat();
String temp = cellStyle.getDataFormatString();
// 单元格设置成常规
if (temp.equals("General")) {
decimalFormat.applyPattern("#");
}
result = decimalFormat.format(value);
}
break;
case Cell.CELL_TYPE_STRING: // 字符串
result = cell.getStringCellValue().toString();
break;
case Cell.CELL_TYPE_BLANK:
result = "";
break;
default:
result = "";
break;
}
return result;
} /**
* 合并单元格
* @param sheet
* @return
*/
private static Map<String, String>[] getRowSpanColSpan(Sheet sheet) {
Map<String, String> map0 = new HashMap<String, String>();
Map<String, String> map1 = new HashMap<String, String>();
// 获取合并后的单元格数量
int mergeNum = sheet.getNumMergedRegions();
CellRangeAddress range = null;
for (int i = 0; i < mergeNum; i++) {
range = sheet.getMergedRegion(i);
int topRow = range.getFirstRow();
int topCol = range.getFirstColumn();
int bottomRow = range.getLastRow();
int bottomCol = range.getLastColumn();
map0.put(topRow + "," + topCol, bottomRow + "," +bottomCol);
int tempRow = topRow;
while (tempRow <= bottomRow) {
int tempCol = topCol;
while (tempCol <= bottomCol) {
map1.put(tempRow + "," + tempCol, "");
tempCol++;
}
tempRow++;
}
map1.remove(topRow + "," + topCol);
}
Map[] map = {map0, map1};
return map;
} static String[] bordesr = { "border-top:", "border-right:", "border-bottom:", "border-left:" };
static String[] borderStyles = { "solid ", "solid ", "solid ", "solid ", "solid ", "solid ", "solid ", "solid ", "solid ", "solid", "solid", "solid", "solid", "solid" }; /**
* 处理单元格样式
* @param wb
* @param sheet
* @param cell
* @param sb
*/
private static void dealExcelStyle(Workbook wb, Sheet sheet, Cell cell, StringBuffer sb) {
CellStyle cellStyle = cell.getCellStyle();
if (cellStyle != null) {
short alignment = cellStyle.getAlignment();
// 单元格内容的水平对齐方式
sb.append("align='" + convertAlignToHtml(alignment) + "' ");
short verticalAlignment = cellStyle.getVerticalAlignment();
// 单元格中内容的垂直排列方式
sb.append("valign='" + convertVerticalAlignToHtml(verticalAlignment) + "' "); if (wb instanceof XSSFWorkbook) { XSSFFont xf = ((XSSFCellStyle) cellStyle).getFont();
short boldWeight = xf.getBoldweight();
sb.append("style='");
sb.append("font-weight:" + boldWeight + ";"); // 字体加粗
sb.append("font-size: " + xf.getFontHeight() / 2 + "%;"); // 字体大小
int columnWidth = sheet.getColumnWidth(cell.getColumnIndex());
sb.append("width:" + columnWidth + "px;"); XSSFColor xc = xf.getXSSFColor();
if (xc != null && !"".equals(xc)) {
sb.append("color:#" + xc.getARGBHex().substring(2) + ";"); // 字体颜色
} XSSFColor bgColor = (XSSFColor) cellStyle.getFillForegroundColorColor();
if (bgColor != null && !"".equals(bgColor)) {
sb.append("background-color:#" + bgColor.getARGBHex().substring(2) + ";"); // 背景颜色
}
sb.append(getBorderStyle(0, cellStyle.getBorderTop(), ((XSSFCellStyle) cellStyle).getTopBorderXSSFColor()));
sb.append(getBorderStyle(1, cellStyle.getBorderRight(), ((XSSFCellStyle) cellStyle).getRightBorderXSSFColor()));
sb.append(getBorderStyle(2, cellStyle.getBorderBottom(), ((XSSFCellStyle) cellStyle).getBottomBorderXSSFColor()));
sb.append(getBorderStyle(3, cellStyle.getBorderLeft(), ((XSSFCellStyle) cellStyle).getLeftBorderXSSFColor())); } else if (wb instanceof HSSFWorkbook) { HSSFFont hf = ((HSSFCellStyle) cellStyle).getFont(wb);
short boldWeight = hf.getBoldweight();
short fontColor = hf.getColor();
sb.append("style='");
HSSFPalette palette = ((HSSFWorkbook) wb).getCustomPalette(); // 类HSSFPalette用于求的颜色的国际标准形式
HSSFColor hc = palette.getColor(fontColor);
sb.append("font-weight:" + boldWeight + ";"); // 字体加粗
sb.append("font-size: " + hf.getFontHeight() / 2 + "%;"); // 字体大小
String fontColorStr = convertToStardColor(hc);
if (fontColorStr != null && !"".equals(fontColorStr.trim())) {
sb.append("color:" + fontColorStr + ";"); // 字体颜色
}
int columnWidth = sheet.getColumnWidth(cell.getColumnIndex());
sb.append("width:" + columnWidth + "px;");
short bgColor = cellStyle.getFillForegroundColor();
hc = palette.getColor(bgColor);
String bgColorStr = convertToStardColor(hc);
if (bgColorStr != null && !"".equals(bgColorStr.trim())) {
sb.append("background-color:" + bgColorStr + ";"); // 背景颜色
}
sb.append(getBorderStyle(palette, 0, cellStyle.getBorderTop(), cellStyle.getTopBorderColor()));
sb.append(getBorderStyle(palette, 1, cellStyle.getBorderRight(), cellStyle.getRightBorderColor()));
sb.append(getBorderStyle(palette, 3, cellStyle.getBorderLeft(), cellStyle.getLeftBorderColor()));
sb.append(getBorderStyle(palette, 2, cellStyle.getBorderBottom(), cellStyle.getBottomBorderColor()));
} sb.append("' ");
}
} /**
* 垂直对齐方式
* @param verticalAlignment
* @return
*/
private static String convertVerticalAlignToHtml(short verticalAlignment) {
String valign = "middle";
switch (verticalAlignment) {
case CellStyle.VERTICAL_BOTTOM:
valign = "bottom";
break;
case CellStyle.VERTICAL_CENTER:
valign = "center";
break;
case CellStyle.VERTICAL_TOP:
valign = "top";
break;
default:
break;
}
return valign;
} /**
* 水平对齐方式
* @param alignment
* @return
*/
private static String convertAlignToHtml(short alignment) {
String align = "left";
switch (alignment) {
case CellStyle.ALIGN_LEFT:
align = "left";
break;
case CellStyle.ALIGN_CENTER:
align = "center";
break;
case CellStyle.ALIGN_RIGHT:
align = "right";
break;
default:
break;
}
return align;
} private static String getBorderStyle(int b, short s, XSSFColor xc) {
if (s == 0)
return bordesr[b] + borderStyles[s] + "#d0d7e5 1px;";
;
if (xc != null && !"".equals(xc)) {
String borderColorStr = xc.getARGBHex();// t.getARGBHex();
borderColorStr = borderColorStr == null || borderColorStr.length() < 1 ? "#000000" : borderColorStr.substring(2);
return bordesr[b] + borderStyles[s] + borderColorStr + " 1px;";
} return "";
} private static String getBorderStyle(HSSFPalette palette, int b, short s, short t) {
if (s == 0)
return bordesr[b] + borderStyles[s] + "#d0d7e5 1px;";
;
String borderColorStr = convertToStardColor(palette.getColor(t));
borderColorStr = borderColorStr == null || borderColorStr.length() < 1 ? "#000000" : borderColorStr;
return bordesr[b] + borderStyles[s] + borderColorStr + " 1px;"; } private static String convertToStardColor(HSSFColor hc) {
StringBuffer sb = new StringBuffer("");
if (hc != null) {
if (HSSFColor.AUTOMATIC.index == hc.getIndex()) {
return null;
}
sb.append("#");
for (int i = 0; i < hc.getTriplet().length; i++) {
sb.append(fillWithZero(Integer.toHexString(hc.getTriplet()[i])));
}
}
return sb.toString();
} private static String fillWithZero(String str) {
if (str != null && str.length() < 2) {
return "0" + str;
}
return str;
}
}
servlet和jsp:
