Article directory
Blog background: JAVA project, a convenient tool class for converting Excel to HTML. Can be used quickly~
1. Call function
excelPositon is the location where excel is stored; htmlPositon is the location where html will be stored.
You can directly set the location to the specified location on the disk; the following defaults to the upper-level directory where the project runs
public void excel2Html() {
String excelPositon = "../test.xlsx";
String htmlPositon = "../test.html";
//excel转html；src为excel位置，htmlPositon为存放html文件位置
Excel2HtmlUtil.readExcelToHtml(excelPositon, htmlPositon, true, "xlsx", "test");
}
2. Excel to HTML tool class
Create the corresponding tool class Excel2HtmlUtil
and adapt the styles of some table headers and first columns; as well as the styles of links. If it is not needed, you can remove it at the corresponding position~
Call the function readExcelToHtml() to use the conversion directly~
//excel转html工具类
package com.xx.util;
import org.apache.commons.io.FileUtils;
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 java.io.*;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Excel2HtmlUtil {
/**
*
* @param filePath excel源文件文件的路径
* @param htmlPositon 生成的html文件的路径
* @param isWithStyle 是否需要表格样式 包含 字体 颜色 边框 对齐方式
* @throws Exception
*
*/
public static String readExcelToHtml(String filePath, String htmlPositon, boolean isWithStyle,String type,String attname) throws Exception {
InputStream is = null;
String htmlExcel = null;
Map<String,String> stylemap = new HashMap<String,String>();
try {
if("csv".equalsIgnoreCase(type)) {
htmlExcel = getCSVInfo(filePath,htmlPositon);
writeFile1(htmlExcel, htmlPositon,stylemap,attname);
}else {
File sourcefile = new File(filePath);
is = new FileInputStream(sourcefile);
Workbook wb = WorkbookFactory.create(is);
if (wb instanceof XSSFWorkbook) {
// 03版excel处理方法
XSSFWorkbook xWb = (XSSFWorkbook) wb;
htmlExcel = getExcelInfo(xWb, isWithStyle,stylemap);
} else if (wb instanceof HSSFWorkbook) {
// 07及10版以后的excel处理方法
HSSFWorkbook hWb = (HSSFWorkbook) wb;
htmlExcel = getExcelInfo(hWb, isWithStyle,stylemap);
}
writeFile(htmlExcel, htmlPositon,stylemap,attname);
}
} catch (Exception e) {
System.out.println("文件被损坏或不能打开，无法预览");
//throw new Exception("文件被损坏或不能打开，无法预览");
} finally {
try {
if(is!=null){
is.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return htmlPositon;
}
private static void getcscvvalue(BufferedReader reader,List col,String oldvalue,List list) {
String line = null;
try {
while((line=reader.readLine())!=null){
String[] item = line.split(",",-1);
boolean isbreak = false;
for(int i=0;i<item.length;i++) {
String value = item[i];
if(value.endsWith("\"")) {
value = oldvalue+value;
col.add(value);
}else if(item.length==1) {
value = oldvalue+value;
getcscvvalue(reader,col,value,list);
isbreak = true;
}else if(value.startsWith("\"")){
getcscvvalue(reader,col,value,list);
isbreak = true;
}else {
col.add(value);
}
}
if(!isbreak) {
list.add(col);
col = new ArrayList();
}
}
} catch (IOException e) {
}
}
private static String getCSVInfo(String filePath,String htmlPositon) {
StringBuffer sb = new StringBuffer();
DataInputStream in = null;
try {
in=new DataInputStream(new FileInputStream(filePath));
BufferedReader reader=new BufferedReader(new InputStreamReader(in));
//reader.readLine();
String line = null;
List list = new ArrayList();
while((line=reader.readLine())!=null){
String[] item = line.split(",");
List col = new ArrayList();
for(int i=0;i<item.length;i++) {
String value = item[i];
if(value.startsWith("\"")) {
getcscvvalue(reader,col,value,list);
}else {
col.add(value);
}
}
list.add(col);
}
sb.append("<table>");
for(int i=0;i<list.size();i++) {
List col = (List) list.get(i);
if(col==null||col.size()==0) {
sb.append("<tr><td ></td></tr>");
}
sb.append("<tr>");
for(int j=0;j<col.size();j++) {
String value = (String) col.get(j);
if (value == null||"".equals(value)) {
sb.append("<td> </td>");
continue;
}else {
sb.append("<td>"+value+"</td>");
}
}
sb.append("</tr>");
}
sb.append("</table>");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
//读取excel文件，返回转换后的html字符串
private static String getExcelInfo(Workbook wb, boolean isWithStyle, Map<String,String> stylemap) {
StringBuffer sb = new StringBuffer();
StringBuffer ulsb = new StringBuffer();
ulsb.append("<ul>");
int num = wb.getNumberOfSheets();
//遍历excel文件里的每一个sheet
for(int i=0;i<num;i++) {
Sheet sheet = wb.getSheetAt(i);// 获取第i个Sheet的内容
String sheetName = sheet.getSheetName();
if(i==0) {
//ulsb.append("<li id='li_"+i+"' class='cur' οnclick='changetab("+i+")'>"+sheetName+"</li>");
ulsb.append("<h3 style=\"background-color:LightSkyBlue ;\">" + sheetName + "</h3>");
}else {
//sheet名字 加上了蓝色底色
//ulsb.append("<li id='li_"+i+"' οnclick='changetab("+i+")'>"+sheetName+"</li>");
ulsb.append("<h3 style=\"background-color:LightSkyBlue ;\">" + sheetName + "</h3>");
}
int lastRowNum = sheet.getLastRowNum();
Map<String, String> map[] = getRowSpanColSpanMap(sheet);
Map<String, String> map1[] = getRowSpanColSpanMap(sheet);
sb.append("<table id='table_"+i+"' ");
if(i==0) {
sb.append("class='block'");
}
sb.append(">");
Row row = null; // 兼容
Cell cell = null; // 兼容
int maxRowNum = 0;
int maxColNum = 0;
//遍历每一行
for (int rowNum = sheet.getFirstRowNum(); rowNum <= lastRowNum; rowNum++) {
row = sheet.getRow(rowNum);
if (row == null) {
continue;
}
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
continue;
}
String stringValue = getCellValue1(cell);
if (map1[0].containsKey(rowNum + "," + colNum)) {
map1[0].remove(rowNum + "," + colNum);
if(maxRowNum<rowNum) {
maxRowNum = rowNum;
}
if(maxColNum<colNum) {
maxColNum = colNum;
}
} else if (map1[1].containsKey(rowNum + "," + colNum)) {
map1[1].remove(rowNum + "," + colNum);
if(maxRowNum<rowNum) {
maxRowNum = rowNum;
}
if(maxColNum<colNum) {
maxColNum = colNum;
}
continue;
}
if (stringValue == null || "".equals(stringValue.trim())) {
continue;
}else {
if(maxRowNum<rowNum) {
maxRowNum = rowNum;
}
if(maxColNum<colNum) {
maxColNum = colNum;
}
}
}
}
for (int rowNum = sheet.getFirstRowNum(); rowNum <= maxRowNum; 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 <= maxColNum; 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);
if (stringValue.equals("")) {
// 空字符串返空
sb.append(stringValue.replace(String.valueOf((char) 160), " "));
}
String pattrenStr = "[a-zA-z]+://[^\\s]*";
Pattern pattern = Pattern.compile(pattrenStr);
Matcher matcher = pattern.matcher(stringValue);
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;
if(rowNum == 0){
sb.append("<td style=\"background-color:WhiteSmoke;font-weight:bold;\",rowspan= '" + rowSpan + "' colspan= '" + colSpan + "' ");
}else{
sb.append("<td rowspan= '" + rowSpan + "' colspan= '" + colSpan + "' ");
}
} else if (map[1].containsKey(rowNum + "," + colNum)) {
map[1].remove(rowNum + "," + colNum);
continue;
} else {
if(rowNum == 0 || colNum == 0){
//列表头加粗&底色
sb.append("<td style=\"background-color:WhiteSmoke;font-weight:bold;\"");
}else{
sb.append("<td ");
}
}
if (isWithStyle) {
dealExcelStyle(wb, sheet, cell, sb,stylemap);// 处理单元格样式
}
sb.append("><nobr>");
//如果单元格为空要判断该单元格是不是通过其他单元格计算得到的
if (stringValue == null) {
// if (stringValue == null || "".equals(stringValue.trim())) {
FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
if (evaluator.evaluate(cell) != null) {
//如果单元格的值是通过其他单元格计算来的，则通过单元格计算获取
String cellnumber = evaluator.evaluate(cell).getNumberValue() + "";
//如果单元格的值是小数，保留两位
if (null != cellnumber && cellnumber.contains(".")) {
String[] decimal = cellnumber.split("\\.");
if (decimal[1].length() > 2) {
int num1 = decimal[1].charAt(0) - '0';
int num2 = decimal[1].charAt(1) - '0';
int num3 = decimal[1].charAt(2) - '0';
if (num3 == 9) {
num2 = 0;
} else if (num3 >= 5) {
num2 = num2 + 1;
}
cellnumber = decimal[0] + "." + num1 + num2;
}
}
stringValue = cellnumber;
}
sb.append(stringValue.replace(String.valueOf((char) 160), " "));
} else {
//如果是链接则使用该语句
if(matcher.matches()){
sb.append("<a href=\""+ stringValue + "\">点击查看内容</a>");
}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("</nobr></td>");
}
sb.append("</tr>");
}
sb.append("</table>");
}
ulsb.append("</ul>");
return ulsb.toString()+sb.toString();
}
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);
// System.out.println(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;
}
private static String getCellValue1(Cell cell) {
String result = new String();
switch (cell.getCellType()) {
case NUMERIC:// 数字类型
result = "1";
break;
case STRING:// String类型
result = "1";
break;
case BLANK:
result = "";
break;
default:
result = "";
break;
}
return result;
}
/**
* 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 NUMERIC:// 数字类型
if (DateUtil.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 STRING:// String类型
result = cell.getRichStringCellValue().toString();
break;
case BLANK:
result = "";
break;
default:
result = "";
break;
}
return result;
}
/**
* 处理表格样式
*
* @param wb
* @param sheet
* @param sb
*/
private static void dealExcelStyle(Workbook wb, Sheet sheet, Cell cell, StringBuffer sb,Map<String,String> stylemap) {
CellStyle cellStyle = cell.getCellStyle();
if (cellStyle != null) {
HorizontalAlignment alignment = cellStyle.getAlignment();
// sb.append("align='" + convertAlignToHtml(alignment) + "' ");//单元格内容的水平对齐方式
VerticalAlignment verticalAlignment = cellStyle.getVerticalAlignment();
String _style = "vertical-align:"+convertVerticalAlignToHtml(verticalAlignment)+";";
if (wb instanceof XSSFWorkbook) {
XSSFFont xf = ((XSSFCellStyle) cellStyle).getFont();
//short boldWeight = xf.getBoldweight();
short boldWeight = 400;
String align = convertAlignToHtml(alignment);
int columnWidth = sheet.getColumnWidth(cell.getColumnIndex());
_style +="font-weight:" + boldWeight + ";font-size: " + xf.getFontHeight() / 2 + "%;width:" + columnWidth + "px;text-align:" + align + ";";
XSSFColor xc = xf.getXSSFColor();
if (xc != null && !"".equals(xc)) {
_style +="color:#" + xc.getARGBHex().substring(2) + ";";
}
XSSFColor bgColor = (XSSFColor) cellStyle.getFillForegroundColorColor();
if (bgColor != null && !"".equals(bgColor)) {
_style +="background-color:#" + bgColor.getARGBHex().substring(2) + ";"; // 背景颜色
}
_style +=getBorderStyle(0, cellStyle.getBorderTop().getCode(),((XSSFCellStyle) cellStyle).getTopBorderXSSFColor());
_style +=getBorderStyle(1, cellStyle.getBorderRight().getCode(),((XSSFCellStyle) cellStyle).getRightBorderXSSFColor());
_style +=getBorderStyle(2, cellStyle.getBorderBottom().getCode(),((XSSFCellStyle) cellStyle).getBottomBorderXSSFColor());
_style +=getBorderStyle(3, cellStyle.getBorderLeft().getCode(),((XSSFCellStyle) cellStyle).getLeftBorderXSSFColor());
} else if (wb instanceof HSSFWorkbook) {
HSSFFont hf = ((HSSFCellStyle) cellStyle).getFont(wb);
short boldWeight = hf.getFontHeight();
short fontColor = hf.getColor();
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);
String align = convertAlignToHtml(alignment);
int columnWidth = sheet.getColumnWidth(cell.getColumnIndex());
_style +="font-weight:" + boldWeight + ";font-size: " + hf.getFontHeight() / 2 + "%;text-align:" + align + ";width:" + columnWidth + "px;";
String fontColorStr = convertToStardColor(hc);
if (fontColorStr != null && !"".equals(fontColorStr.trim())) {
_style +="color:" + fontColorStr + ";"; // 字体颜色
}
short bgColor = cellStyle.getFillForegroundColor();
hc = palette.getColor(bgColor);
String bgColorStr = convertToStardColor(hc);
if (bgColorStr != null && !"".equals(bgColorStr.trim())) {
_style +="background-color:" + bgColorStr + ";"; // 背景颜色
}
_style +=getBorderStyle(palette, 0, cellStyle.getBorderTop().getCode(), cellStyle.getTopBorderColor());
_style +=getBorderStyle(palette, 1, cellStyle.getBorderRight().getCode(), cellStyle.getRightBorderColor());
_style +=getBorderStyle(palette, 3, cellStyle.getBorderLeft().getCode(), cellStyle.getLeftBorderColor());
_style +=getBorderStyle(palette, 2, cellStyle.getBorderBottom().getCode(), cellStyle.getBottomBorderColor());
}
String calssname="";
if(!stylemap.containsKey(_style)) {
int count = stylemap.size();
calssname = "td"+count;
stylemap.put(_style, calssname);
}else {
calssname = stylemap.get(_style);
}
if(!"".equals(calssname)) {
sb.append("class='"+calssname+"'");
}
}
}
/**
* 单元格内容的水平对齐方式
*
* @param alignment
* @return
*/
private static String convertAlignToHtml(HorizontalAlignment alignment) {
String align = "center";
switch (alignment) {
case LEFT:
align = "left";
break;
case CENTER:
align = "center";
break;
case 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(VerticalAlignment verticalAlignment) {
String valign = "middle";
switch (verticalAlignment) {
case BOTTOM:
valign = "bottom";
break;
case CENTER:
valign = "middle";
break;
case TOP:
valign = "top";
break;
default:
break;
}
return valign;
}
private static String convertToStardColor(HSSFColor hc) {
StringBuffer sb = new StringBuffer("");
if (hc != null) {
if (HSSFColor.HSSFColorPredefined.AUTOMATIC.getIndex() == 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 "";
}
/*
* @param content 生成的excel表格标签
*
* @param htmlPath 生成的html文件地址
*/
private static void writeFile(String content, String htmlPath, Map<String,String> stylemap,String name) {
File file2 = new File(htmlPath);
StringBuilder sb = new StringBuilder();
try {
file2.createNewFile();// 创建文件
sb.append("<html><head><meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"><title>"+name+"</title><style type=\"text/css\">");
sb.append("ul{list-style: none;max-width: calc(100%);padding: 0px;margin: 0px;overflow-x: scroll;white-space: nowrap;} ul li{padding: 3px 5px;display: inline-block;border-right: 1px solid #768893;} ul li.cur{color: #F59C25;} table{border-collapse:collapse;display:none;width:100%;} table.block{display: block;}");
for(Map.Entry<String, String> entry : stylemap.entrySet()){
String mapKey = entry.getKey();
String mapValue = entry.getValue();
sb.append(" ."+mapValue+"{"+mapKey+"}");
}
sb.append("</style><script>");
sb.append("function changetab(i){var block = document.getElementsByClassName(\"block\");block[0].className = block[0].className.replace(\"block\",\"\");var cur = document.getElementsByClassName(\"cur\");cur[0].className = cur[0].className.replace(\"cur\",\"\");var curli = document.getElementById(\"li_\"+i);curli.className += ' cur';var curtable = document.getElementById(\"table_\"+i);curtable.className=' block';}");
sb.append("</script></head><body>");
sb.append("<div>");
sb.append(content);
sb.append("</div>");
sb.append("</body></html>");
FileUtils.write(file2, sb.toString(),"UTF-8");
} catch (IOException e) {
e.printStackTrace();
}
}
private static void writeFile1(String content, String htmlPath, Map<String,String> stylemap,String name) {
File file2 = new File(htmlPath);
StringBuilder sb = new StringBuilder();
try {
file2.createNewFile();// 创建文件
sb.append("<html><head><meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"><title>"+name+"</title><style type=\"text/css\">");
sb.append("ul{list-style: none;max-width: calc(100%);padding: 0px;margin: 0px;overflow-x: scroll;white-space: nowrap;} ul li{padding: 3px 5px;display: inline-block;border-right: 1px solid #768893;} ul li.cur{color: #F59C25;} table{border-collapse:collapse;width:100%;} td{border: solid #000000 1px; min-width: 200px;}");
sb.append("</style></head><body>");
sb.append("<div>");
sb.append(content);
sb.append("</div>");
sb.append("</body></html>");
FileUtils.write(file2, sb.toString(),"UTF-8");
} catch (IOException e) {
e.printStackTrace();
}
}
}
3. HTML style analysis
3.1 Load image-URL link
src sets the address of the image to be loaded, and alt is the prompt displayed when the linked content is not loaded.
<img src="http://www.baidu.com/images/xx.jpg" alt="暂未加载图像">
3.2 Set image size
You can directly set the proportion to 100%; you can also directly set the proportion to 100px.
width="图片宽度" height="图片高度"
width=100%
3.3 Set title - background color & bold
hX is the title setting; background-color sets the background color; font-weight:bold is bold
<h4 style="background-color:LightSkyBlue;font-weight:bold;">标题</h4>
3.4 Dot style
Set as statement with dot style
<li id='li_1' οnclick='changetab(1)'>第一张</li>
3.5 The url link is displayed as the setting content
The link is not displayed directly. It is displayed as "Click to view the content". You can click to jump and
click to view the content.
3.6 Table – one row and three columns
<table border="1">
<tr>
<td>100</td>
<td>200</td>
<td>300</td>
</tr>
</table>
3.6 Table – two rows and three columns
<table border="1">
<tr>
<td> 1 </td>
<td> 2 </td>
<td> 3 </td>
</tr>
<tr>
<td>400</td>
<td>500</td>
<td>600</td>
</tr>
3.7 Paragraphs
Specific content in the body of the paragraph
<p>段落段落段落段落段落段落段落</p>
4. Time tools
A time tool class specifically designed for table use to solve the problem of format conversion.
//DateUtil
public class DateUtil {
public static boolean isCellDateFormatted(Cell cell)
{
if (cell == null) {
return false;
}
boolean bDate = false;
double d = cell.getNumericCellValue();
if (isValidExcelDate(d)) {
CellStyle style = cell.getCellStyle();
if (style == null) {
return false;
}
int i = style.getDataFormat();
String f = style.getDataFormatString();
bDate = isADateFormat(i, f);
}
return bDate;
}
public static boolean isADateFormat(int formatIndex, String formatString)
{
if (isInternalDateFormat(formatIndex)) {
return true;
}
if ((formatString == null) || (formatString.length() == 0)) {
return false;
}
String fs = formatString;
//添加以支持汉字格式wingzing
fs = fs.replaceAll("[\"|\']","").replaceAll("[年|月|日|时|分|秒|毫秒|微秒]", "");
fs = fs.replaceAll("\\\\-", "-");
fs = fs.replaceAll("\\\\,", ",");
fs = fs.replaceAll("\\\\.", ".");
fs = fs.replaceAll("\\\\ ", " ");
fs = fs.replaceAll(";@", "");
fs = fs.replaceAll("^\\[\\$\\-.*?\\]", "");
fs = fs.replaceAll("^\\[[a-zA-Z]+\\]", "");
return (fs.matches("^[yYmMdDhHsS\\-/,. :]+[ampAMP/]*$"));
}
public static boolean isInternalDateFormat(int format)
{
switch (format) {
case 14:
case 15:
case 16:
case 17:
case 18:
case 19:
case 20:
case 21:
case 22:
case 45:
case 46:
case 47:
return true;
case 23:
case 24:
case 25:
case 26:
case 27:
case 28:
case 29:
case 30:
case 31:
case 32:
case 33:
case 34:
case 35:
case 36:
case 37:
case 38:
case 39:
case 40:
case 41:
case 42:
case 43:
case 44: } return false;
}
public static boolean isValidExcelDate(double value)
{
return (value > -4.940656458412465E-324D);
}
}
Reference:
https://www.runoob.com/html/html-colornames.html
https://www.cnblogs.com/mythz/p/14177739.html
https://blog.csdn.net/qq_33697094/article/ details/122736603