easyexcel一个单元格导出多张图片等
1.引入easyexcel依赖
com.alibaba easyexcel-core 3.1.2 compile
2.设置自动列宽，我是获取到导出类上注解设置的宽度
/**
* 自动列宽
*/
@Component
public class AutoColumnWidthStyleStrategy extends AbstractColumnWidthStyleStrategy {
private static final int MAX_COLUMN_WIDTH = 255;
//自定义列的列宽
private Map zdyColumnWidth = MapUtils.newHashMapWithExpectedSize(20);
private Map headNameColumnWidthMap = MapUtils.newHashMapWithExpectedSize(20);
private final Map> cache = MapUtils.newHashMapWithExpectedSize(20);
@Override
protected void setColumnWidth(WriteSheetHolder writeSheetHolder, List> cellDataList, Cell cell,
Head head,
Integer relativeRowIndex, Boolean isHead) {
boolean needSetWidth = isHead || !CollectionUtils.isEmpty(cellDataList);
if (!needSetWidth) {
return;
}
String cellString = cell.toString();
if (zdyColumnWidth.containsKey(cellString)) {
writeSheetHolder.getSheet().setColumnWidth(cell.getColumnIndex(), zdyColumnWidth.get(cellString) * 256);
return;
}
if (headNameColumnWidthMap.containsKey(cellString)){
cell.getCellStyle().setWrapText(true);
writeSheetHolder.getSheet().setColumnWidth(cell.getColumnIndex(), headNameColumnWidthMap.get(cellString) * 256);
return;
}
if (true) return ;
Map maxColumnWidthMap = cache.get(writeSheetHolder.getSheetNo());
if (maxColumnWidthMap == null) {
maxColumnWidthMap = new HashMap(16);
cache.put(writeSheetHolder.getSheetNo(), maxColumnWidthMap);
}
Integer columnWidth = dataLength(cellDataList, cell, isHead);
if (columnWidth < 0) {
return;
}
if (columnWidth > MAX_COLUMN_WIDTH) {
columnWidth = MAX_COLUMN_WIDTH;
}
Integer maxColumnWidth = maxColumnWidthMap.get(cell.getColumnIndex());
if (maxColumnWidth == null || columnWidth > maxColumnWidth) {
maxColumnWidthMap.put(cell.getColumnIndex(), columnWidth);
writeSheetHolder.getSheet().setColumnWidth(cell.getColumnIndex(), columnWidth * 256);
}
}
private Integer dataLength(List> cellDataList, Cell cell, Boolean isHead) {
if (isHead) {
return cell.getStringCellValue().getBytes().length;
}
WriteCellData cellData = cellDataList.get(0);
CellDataTypeEnum type = cellData.getType();
if (type == null) {
return -1;
}
switch (type) {
case STRING:
return cellData.getStringValue().getBytes().length;
case BOOLEAN:
return cellData.getBooleanValue().toString().getBytes().length;
case NUMBER:
return cellData.getNumberValue().toString().getBytes().length;
default:
return -1;
}
}
public void setZdyColumnWidth(Map zdyColumnWidth,Map headNameColumnWidthMap) {
this.zdyColumnWidth = zdyColumnWidth;
this.headNameColumnWidthMap = headNameColumnWidthMap;
}
} 3.将图片导出成超链接的处理类
/**
* 动态添加超链接
*/
@Component
public class ExcelHyperlinkHandler implements CellWriteHandler {
public ExcelHyperlinkHandler() {
}
@Override
public void beforeCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row,
Head head, Integer integer, Integer integer1, Boolean isHead) {
}
@Override
public void afterCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Cell cell,
Head head, Integer integer, Boolean aBoolean) {
}
@Override
public void afterCellDataConverted(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, WriteCellData cellData, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {
}
@Override
public void afterCellDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, List> cellDataList, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {
if (isHead) return ;
//当前行
int curRowIndex = cell.getRowIndex();
//当前列
int curColIndex = cell.getColumnIndex();
CellStyle cellStyle = cell.getCellStyle();
// 设置换行
cellStyle.setWrapText(true);
if (curColIndex == 6 || curColIndex == 7 || curColIndex == 8) {
// 设置字体颜色
XSSFFont xssfFont = new XSSFFont();
xssfFont.setColor(IndexedColors.BLUE.index);
cellStyle.setFont(xssfFont);
String stringCellValue = cell.getCellType()==CellType.STRING ? cell.getStringCellValue():null;
if (StringUtils.isNotBlank(stringCellValue)){
//获得超链接，当前单元格的内容就是一个超链接
CreationHelper creationHelper = writeSheetHolder.getSheet().getWorkbook().getCreationHelper();
Hyperlink hyperlink = creationHelper.createHyperlink(HyperlinkType.URL);
String[] picUrlArr = stringCellValue.split(",");
// 处理图片超链接
if (curColIndex == 6){
hyperlink.setAddress(picUrlArr[0]);
cell.setHyperlink(hyperlink);//添加超链接
cell.setCellValue("图片1");
} else if (curColIndex == 7){
if (picUrlArr.length > 1){
hyperlink.setAddress(picUrlArr[1]);
cell.setHyperlink(hyperlink);//添加超链接
cell.setCellValue("图片2");
}else{
cell.setCellValue("");
}
} else if(curColIndex == 8){
if (picUrlArr.length > 2){
hyperlink.setAddress(picUrlArr[2]);
cell.setHyperlink(hyperlink);//添加超链接
cell.setCellValue("图片3");
}else{
cell.setCellValue("");
}
}
}
}
}
4.设置表格头和内容样式
/*
EasyExcel 表格样式工具类
*/
@Component
public class SetCellStyle extends AbstractVerticalCellStyleStrategy {
//表格头样式
@Override
protected WriteCellStyle headCellStyle(Head head) {
WriteCellStyle writeCellStyle = new WriteCellStyle();
writeCellStyle.setWrapped(true);
WriteFont font = new WriteFont();
//自定义字体颜色, 默认黑色
font.setColor(IndexedColors.BLACK.index);
writeCellStyle.setWriteFont(font);
return writeCellStyle;
}
//单元格格内样式 写法与上面类似
@Override
protected WriteCellStyle contentCellStyle(Head head) {
WriteCellStyle writeCellStyle = new WriteCellStyle();
WriteFont font = new WriteFont();
Integer columnIndex = head.getColumnIndex();
//自定义字体颜色, 默认黑色
if (columnIndex == 6 || columnIndex == 7 || columnIndex == 8){
font.setColor(IndexedColors.BLUE.index);
}else{
font.setColor(IndexedColors.BLACK.index);
}
writeCellStyle.setWriteFont(font);
writeCellStyle.setWrapped(true);
return writeCellStyle;
}
public static HorizontalCellStyleStrategy getHorizontalStyleStrategy(){
// 头的策略
WriteCellStyle headWriteCellStyle = new WriteCellStyle();
// // 背景设置为灰色
// headWriteCellStyle.setFillForegroundColor(IndexedColors.LIGHT_ORANGE.getIndex());
// WriteFont headWriteFont = new WriteFont();
// headWriteFont.setFontHeightInPoints((short)10);
// // 字体样式
// headWriteFont.setFontName("Frozen");
// headWriteFont.setColor(IndexedColors.BLUE.getIndex());
// headWriteCellStyle.setWriteFont(headWriteFont);
// //自动换行
// headWriteCellStyle.setWrapped(true);
// // 水平对齐方式
// headWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);
// // 垂直对齐方式
// headWriteCellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
// 内容的策略
WriteCellStyle contentWriteCellStyle = new WriteCellStyle();
contentWriteCellStyle.setWrapped(true);
// // 这里需要指定 FillPatternType 为FillPatternType.SOLID_FOREGROUND 不然无法显示背景颜色.头默认了 FillPatternType所以可以不指定
// // contentWriteCellStyle.setFillPatternType(FillPatternType.SQUARES);
// // 背景白色
// contentWriteCellStyle.setFillForegroundColor(IndexedColors.WHITE.getIndex());
// // 字体样式
// WriteFont contentWriteFont = new WriteFont();
// // 字体大小
// contentWriteFont.setFontHeightInPoints((short)10);
// // 字体样式
// contentWriteFont.setFontName("Calibri");
// contentWriteFont.setColor(IndexedColors.BLACK.getIndex());
// contentWriteCellStyle.setWriteFont(contentWriteFont);
// // 设置边框
// contentWriteCellStyle.setBorderBottom(BorderStyle.THIN);
// contentWriteCellStyle.setBorderTop(BorderStyle.THIN);
// contentWriteCellStyle.setBorderLeft(BorderStyle.THIN);
// contentWriteCellStyle.setBorderRight(BorderStyle.THIN);
// 这个策略是 头是头的样式 内容是内容的样式 其他的策略可以自己实现
return new HorizontalCellStyleStrategy(headWriteCellStyle, contentWriteCellStyle);
}
}5.将图片导出在单元格
/**
* 生成有图片的excel
* @param dataList 数据列表
*/
public void generateImageExcel(HttpServletResponse response,List dataList) throws Exception {
if (CollectionUtils.isEmpty(dataList)) return ;
String fileName = "数据列表";
String sheetName = "数据列表";
String picHeadName = "截图";
//图片列最大图片数
AtomicReference maxImageSize = new AtomicReference<>(0);
dataList.forEach(item -> {
String picUrls = item.getReportPicUrl();
if (StringUtils.isNotEmpty(picUrls)){
if (picUrls.split(",").length > maxImageSize.get()) {
maxImageSize.set(picUrls.split(",").length);
}
}
});
// 表头名称和列宽的映射
Map stringIntegerMap = HandleObjDataUtil.headNameColumnWidthMap(ReportQuestionReplyExportDTO.class);
//设置列长度所用类
AutoColumnWidthStyleStrategy longWidth = new AutoColumnWidthStyleStrategy();
Integer partitionSize = dataList.size()/10;
// 对集合切割分区并发处理
List> dataPartition = Lists.partition(dataList, partitionSize > 20? 20 : partitionSize);
dataPartition.parallelStream().forEach(objList -> {
objList.forEach(item -> {
WriteCellData writeCellData = new WriteCellData<>();
if (StringUtils.isNotEmpty(item.getReportPicUrl())) {
//每张图片间距
Integer splitWidth = -2;
//每张图片的长度
Integer imageWidth = 60;
//图片列的最大长度
Integer sumWidth = maxImageSize.get() * (imageWidth + splitWidth);
List imageDataList = new ArrayList<>();
List imagePathList = Lists.newArrayList(item.getReportPicUrl().split(","));
for (int i = 1; i <= imagePathList.size(); i++) {
String path = imagePathList.get(i - 1);
Integer left = imageWidth * (i - 1) + i * splitWidth;
Integer right = sumWidth - imageWidth - left;
ImageData imageData = new ImageData();
byte[] bytes = null;
InputStream inputStream = null;
ByteArrayOutputStream outputStream = null;
try {
inputStream = new URL(path).openStream();
outputStream = new ByteArrayOutputStream();
// 对图片进行压缩
Thumbnails.of(inputStream).scale(0.9f).outputQuality(0.3f).toOutputStream(outputStream);
bytes = outputStream.toByteArray();
} catch (IOException e) {
e.printStackTrace();
continue;
} finally {
if (inputStream != null){
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
if (bytes.length < 1) continue;
imageData.setImage(bytes);
imageData.setImageType(ImageData.ImageType.PICTURE_TYPE_PNG);
//距离单元格顶部距离
imageData.setTop(1);
//距离单元格底部距离
imageData.setBottom(1);
//距离单元格左边距离
imageData.setLeft(left);
//距离单元格右边距离
imageData.setRight(right);
imageData.setAnchorType(ClientAnchorData.AnchorType.MOVE_AND_RESIZE);
imageDataList.add(imageData);
}
writeCellData.setImageDataList(imageDataList);
Map zdyColumnWidth = new HashMap<>();
//图片列名称，对应导出对象的列名称，图片列长度
zdyColumnWidth.put(picHeadName, sumWidth / 6);
//设置列长度所用类
longWidth.setZdyColumnWidth(zdyColumnWidth,stringIntegerMap);
}
item.setWriteCellDataFile(writeCellData);
});
});
ResponseDataUtils.setExcelRespProp(response,fileName);
EasyExcel.write(response.getOutputStream())
.registerWriteHandler(longWidth)
.head(ReportQuestionReplyExportDTO.class)
.excelType(ExcelTypeEnum.XLSX)
.sheet(sheetName)
.doWrite(dataList);
} 最后由于导出图片太多的话，很慢，导致导出超时，并且excel很大，最后方案改成将图片链接导成excel超链接