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1，maven项目加入依赖
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.9</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.9</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
2，新建一个ExcelUtil.java的工具类文件
package com.twf.excel2html.Excel2html;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
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;
public class ExcelUtil {
private static final DecimalFormat decimalFormat = new DecimalFormat("#.###");
/**
* 功能描述：将sheet末位为空的行去掉，得到实际有数据的行数 输入参数：<按照参数定义顺序>
*
* @param HSSFSheet
* :Excel表单封装对象 返回值: 类型 <说明>
* @return
* @throws Exception
*/
public static int filterNullRow(Sheet childSheet) {
int rowNum = childSheet.getLastRowNum();
int j = 1;
// 判断末行，如果不为空，直接返回行数
Row lastRow = childSheet.getRow(rowNum);
if (!isNullRow(lastRow))
return rowNum;
// 如果末行为空，则进入循环，直到遇到不为空的为止
for (int i = rowNum - 1; i > 0; i--) {
Row row = childSheet.getRow(i);
if (row == null || isNullRow(row)) {
j++;
} else {
break;
}
}
return rowNum - j;
}
/**
* 功能描述：判断一行是否是空行，true 是 false 不是 输入参数：<按照参数定义顺序>
*
* @param HSSFRow
* :Excel表单行封装对象 返回值: 类型 <说明>
* @return boolean
* @throws Exception
*/
public static boolean isNullRow(Row row) {
if (row == null)
return true;
boolean nullFlag = true;
for (int k = 0; k < row.getLastCellNum(); k++) {
Cell cell = row.getCell((short) k);
if (!"".equals(transferToString(cell))) {
nullFlag = false;
break;
}
}
return nullFlag;
}
/**
* 功能描述：处理cell中的值 输入参数：<按照参数定义顺序>
*
* @param HSSFCell
* :Excel表单单元格封装对象 返回值: 类型 <说明>
* @return String
* @throws Exception
*/
public static String transferToString(Cell cell) {
String transferedStr = "";
if (cell == null) {
return "";
}
switch (cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC: // 数字
if (HSSFDateUtil.isCellDateFormatted(cell)) {
// 如果是date类型则 ，获取该cell的date值
transferedStr = HSSFDateUtil.getJavaDate(cell.getNumericCellValue()).toString();
} else { // 纯数字
double cellValue = cell.getNumericCellValue();
transferedStr = decimalFormat.format(cellValue);
}
break;
case Cell.CELL_TYPE_STRING: // 字符串
transferedStr = cell.getStringCellValue() + "";
break;
default:
transferedStr = "";
break;
}
return transferedStr;
}
/**
* 获取表格单元格Cell内容
*
* @param cell
* @return
*/
public 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)) {// 处理日期格式、时间格式
SimpleDateFormat sdf = null;
if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {
sdf = new SimpleDateFormat("HH:mm");
} else {// 日期
sdf = new SimpleDateFormat("yyyy-MM-dd");
}
Date date = cell.getDateCellValue();
result = sdf.format(date);
} else if (cell.getCellStyle().getDataFormat() == 58) {
// 处理自定义日期格式：m月d日(通过判断单元格的格式id解决，id的值是58)
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
double value = cell.getNumericCellValue();
Date date = org.apache.poi.ss.usermodel.DateUtil.getJavaDate(value);
result = sdf.format(date);
} else {
double value = cell.getNumericCellValue();
CellStyle style = cell.getCellStyle();
DecimalFormat format = new DecimalFormat();
String temp = style.getDataFormatString();
// 单元格设置成常规
if (temp.equals("General")) {
format.applyPattern("#");
}
result = format.format(value);
}
break;
case Cell.CELL_TYPE_STRING:// String类型
result = cell.getRichStringCellValue().toString();
break;
case Cell.CELL_TYPE_BLANK:
result = "";
break;
default:
result = "";
break;
}
return result;
}
}
3，新建ExcelToHtml.java文件。
package com.twf.excel2html.Excel2html;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.Writer;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
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.FormulaEvaluator;
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;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ExcelToHtml {
private static final Logger logger = LoggerFactory.getLogger(ExcelToHtml.class);
/**
* 测试
*
* @param args
*/
public static void main(String[] args) {
String path = "G:\\temp\\123.xlsx";// E://Microsoft Excel 工作表.xlsx
String outPath = "G:\\temp\\123.html";
InputStream is = null;
String htmlExcel = null;
Writer or = null;
BufferedWriter bor = null;
try {
File sourcefile = new File(path);
File source = new File(outPath);
is = new FileInputStream(sourcefile);
or = new FileWriter(source);
bor = new BufferedWriter(or);
Workbook wb = WorkbookFactory.create(is);// 此WorkbookFactory在POI-3.10版本中使用需要添加dom4j
if (wb instanceof XSSFWorkbook) {
XSSFWorkbook xWb = (XSSFWorkbook) wb;
htmlExcel = ExcelToHtml.getExcelInfo(xWb, true);
} else if (wb instanceof HSSFWorkbook) {
HSSFWorkbook hWb = (HSSFWorkbook) wb;
htmlExcel = ExcelToHtml.getExcelInfo(hWb, true);
}
logger.debug("ExcelToHtml:"+htmlExcel);
bor.write(htmlExcel);
bor.flush();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
logger.debug("ExcelToHtml IOException:"+e);
}
try {
bor.close();
} catch (IOException e) {
logger.debug("ExcelToHtml IOException:"+e);
}
try {
or.close();
} catch (IOException e) {
logger.debug("ExcelToHtml IOException:"+e);
}
}
}
/**
* 程序入口方法将sourceFile文件保存为html并存入resultFile
* @param sourceFile
* @param resultFile
* @param isWithStyle
* @return
*/
public String readExcelToHtml(File sourceFile, File resultFile, boolean isWithStyle) {
logger.debug("ExcelToHtml:fileName="+sourceFile.getName());
InputStream is = null;
String htmlExcel = null;
Writer or = null;
BufferedWriter bor = null;
try {
is = new FileInputStream(sourceFile);
or = new FileWriter(resultFile);
bor = new BufferedWriter(or);
Workbook wb = WorkbookFactory.create(is);
if (wb instanceof XSSFWorkbook) {
XSSFWorkbook xWb = (XSSFWorkbook) wb;
htmlExcel = ExcelToHtml.getExcelInfo(xWb, isWithStyle);
} else if (wb instanceof HSSFWorkbook) {
HSSFWorkbook hWb = (HSSFWorkbook) wb;
htmlExcel = ExcelToHtml.getExcelInfo(hWb, isWithStyle);
}
logger.debug("ExcelToHtml:"+htmlExcel);
bor.write(htmlExcel);
bor.flush();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
logger.debug("ExcelToHtml IOException:"+e);
}
try {
bor.close();
} catch (IOException e) {
logger.debug("ExcelToHtml IOException:"+e);
}
try {
or.close();
} catch (IOException e) {
logger.debug("ExcelToHtml IOException:"+e);
}
}
return htmlExcel;
}
/**
* 获取表格数据转为html元素
* @param wb
* @param isWithStyle
* @return
*/
public static String getExcelInfo(Workbook wb, boolean isWithStyle) {
StringBuffer sb = new StringBuffer();
Sheet sheet = wb.getSheetAt(0);// 获取第一个Sheet的内容
// 去掉表格中没有值的行，获取表格的实际的行数
int lastRowNum = ExcelUtil.filterNullRow(sheet);
Map<String, String> map[] = getRowSpanColSpanMap(sheet);
sb.append("<table style='border-collapse:collapse;' width='100%'>");
Row row = null; // 兼容
Cell cell = null; // 兼容
for (int rowNum = sheet.getFirstRowNum(); rowNum <= lastRowNum; rowNum++) {
row = sheet.getRow(rowNum);
if (row == null) {
sb.append("<tr><td > </td></tr>");
continue;
}
sb.append("<tr>");
int lastColNum = row.getLastCellNum();
for (int colNum = 0; colNum < lastColNum; colNum++) {
cell = row.getCell(colNum);
if (cell == null) { // 特殊情况 空白的单元格会返回null
sb.append("<td> </td>");
continue;
}
String stringValue = getCellValue(cell);
// 如果是空值要进行计算判断是否有计算的结果值。
if (stringValue==null||"".equals(stringValue.trim())){
FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
stringValue = evaluator.evaluate(cell).getNumberValue()+"";
}
if (map[0].containsKey(rowNum + "," + colNum)) {
String pointString = map[0].get(rowNum + "," + colNum);
map[0].remove(rowNum + "," + colNum);
int bottomeRow = Integer.valueOf(pointString.split(",")[0]);
int bottomeCol = Integer.valueOf(pointString.split(",")[1]);
int rowSpan = bottomeRow - rowNum + 1;
int colSpan = bottomeCol - colNum + 1;
sb.append("<td rowspan= '" + rowSpan + "' colspan= '" + colSpan + "' ");
} else if (map[1].containsKey(rowNum + "," + colNum)) {
map[1].remove(rowNum + "," + colNum);
continue;
} else {
sb.append("<td ");
}
// 判断是否需要样式
if (isWithStyle) {
dealExcelStyle(wb, sheet, cell, sb);// 处理单元格样式
}
sb.append(">");
if (stringValue == null || "".equals(stringValue.trim())) {
sb.append(" ");
} else {
// 将ascii码为160的空格转换为html下的空格（ ）
sb.append(stringValue.replace(String.valueOf((char) 160), " "));
}
sb.append("</td>");
}
sb.append("</tr>");
}
sb.append("</table>");
return sb.toString();
}
@SuppressWarnings("unchecked")
private static Map<String, String>[] getRowSpanColSpanMap(Sheet sheet) {
Map<String, String> map0 = new HashMap<String, String>();
Map<String, String> map1 = new HashMap<String, String>();
int mergedNum = sheet.getNumMergedRegions();
CellRangeAddress range = null;
for (int i = 0; i < mergedNum; 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);
}
@SuppressWarnings("rawtypes")
Map[] map = { map0, map1 };
return map;
}
/**
* 获取表格单元格Cell内容
*
* @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)) {// 处理日期格式、时间格式
SimpleDateFormat sdf = null;
if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {
sdf = new SimpleDateFormat("HH:mm");
} else {// 日期
sdf = new SimpleDateFormat("yyyy-MM-dd");
}
Date date = cell.getDateCellValue();
result = sdf.format(date);
} else if (cell.getCellStyle().getDataFormat() == 58) {
// 处理自定义日期格式：m月d日(通过判断单元格的格式id解决，id的值是58)
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
double value = cell.getNumericCellValue();
Date date = org.apache.poi.ss.usermodel.DateUtil.getJavaDate(value);
result = sdf.format(date);
} else {
double value = cell.getNumericCellValue();
CellStyle style = cell.getCellStyle();
DecimalFormat format = new DecimalFormat();
String temp = style.getDataFormatString();
// 单元格设置成常规
if (temp.equals("General")) {
format.applyPattern("#");
}
result = format.format(value);
}
break;
case Cell.CELL_TYPE_STRING:// String类型
result = cell.getRichStringCellValue().toString();
break;
case Cell.CELL_TYPE_BLANK:
result = "";
break;
default:
result = "";
break;
}
return result;
}
/**
* 处理表格样式
*
* @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();
sb.append("align='" + convertAlignToHtml(alignment) + "' ");// 单元格内容的水平对齐方式
short verticalAlignment = cellStyle.getVerticalAlignment();
sb.append("valign='" + convertVerticalAlignToHtml(verticalAlignment) + "' ");// 单元格中内容的垂直排列方式
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("' ");
}
}
/**
* 单元格内容的水平对齐方式
*
* @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;
}
/**
* 单元格中内容的垂直排列方式
*
* @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;
}
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;
}
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" };
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 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 "";
}
}
执行main方法可以直接将excel文件转为html。