1. Rendering
2. Export interface code
@PostMapping("selectAllMagicExport")
public void selectAllMagicExport(HttpServletRequest request, HttpServletResponse response) throws IOException {
ServiceResult<SearchResult<TestMetLineFe2o3Export>> result = success(searcher.search(TestMetLineFe2o3Export.class, MapUtils.flat(request.getParameterMap())));
SearchResult<TestMetLineFe2o3Export> searchResult = result.getData();
List<TestMetLineFe2o3Export> dataList = searchResult.getDataList();
// Excel格式：入厂日期相同日期合并
// 设置响应头信息
response.setContentType("application/vnd.ms-excel");
response.setCharacterEncoding("utf-8");
response.setHeader("Content-disposition", "attachment;filename=chatEduExport.xlsx");
// 使用EasyExcel进行导出
ExcelWriter excelWriter = EasyExcel.write(response.getOutputStream(), TestMetLineFe2o3Export.class)
.registerWriteHandler(new LongestMatchColumnWidthStyleStrategy())
.registerWriteHandler(new ExcelFillCellMergeStrategy(1, new int[]{1, 4, 5, 6, 12, 14}))
.build();
WriteSheet writeSheet = EasyExcel.writerSheet("铁红").build();
excelWriter.write(dataList, writeSheet);
excelWriter.finish();
}
3. Interceptor
import cn.hutool.core.util.ReUtil;
import cn.hutool.core.util.StrUtil;
import com.alibaba.excel.metadata.Head;
import com.alibaba.excel.metadata.data.WriteCellData;
import com.alibaba.excel.write.handler.CellWriteHandler;
import com.alibaba.excel.write.handler.context.CellWriteHandlerContext;
import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
import com.alibaba.excel.write.metadata.holder.WriteTableHolder;
import com.alibaba.excel.write.metadata.style.WriteCellStyle;
import com.ciih.workshop.entity.TestMetLineFe2o3Export;
import com.ciih.workshop.utils.HexToRGB;
import com.ejlchina.searcher.BeanSearcher;
import lombok.Data;
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.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import java.util.HashMap;
import java.util.List;
/**
* 合并单元格
*/
@Component
@Data
public class ExcelFillCellMergeStrategy implements CellWriteHandler {
@Resource
private BeanSearcher searcher;
// 先声明一个对象
private static ExcelFillCellMergeStrategy excelFillCellMergeStrategy;
//启动注入
@PostConstruct
public void init() {
excelFillCellMergeStrategy = this;
excelFillCellMergeStrategy.searcher = this.searcher;
}
/**
* 合并字段的下标，如第一到五列new int[]{0,1,2,3,4}
*/
private int[] mergeColumnIndex;
/**
* 从第几行开始合并，如果表头占两行，这个数字就是2
*/
private int mergeRowIndex;
public ExcelFillCellMergeStrategy() {
}
public ExcelFillCellMergeStrategy(int mergeRowIndex, int[] mergeColumnIndex) {
this.mergeRowIndex = mergeRowIndex;
this.mergeColumnIndex = mergeColumnIndex;
}
@Override
public void beforeCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row,
Head head, Integer integer, Integer integer1, Boolean aBoolean) {
}
@Override
public void afterCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Cell cell,
Head head, Integer integer, Boolean aBoolean) {
}
@Override
public void afterCellDispose(CellWriteHandlerContext context) {
// 当前单元格
Cell cell = context.getCell();
//当前行
int curRowIndex = context.getCell().getRowIndex();
//当前列
int curColIndex = context.getCell().getColumnIndex();
if (curRowIndex > mergeRowIndex) {
for (int i = 0; i < mergeColumnIndex.length; i++) {
if (curColIndex == mergeColumnIndex[i]) {
// 合并单元格
mergeWithPrevRow(context.getWriteSheetHolder(), context.getCell(), curRowIndex, curColIndex);
break;
}
}
}
// 设置内容居中
WriteCellData<?> cellData = context.getFirstCellData();
WriteCellStyle writeCellStyle = cellData.getOrCreateStyle();
writeCellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
writeCellStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);
// 设置边框
writeCellStyle.setBorderBottom(BorderStyle.THIN);
writeCellStyle.setBorderLeft(BorderStyle.THIN);
writeCellStyle.setBorderRight(BorderStyle.THIN);
writeCellStyle.setBorderTop(BorderStyle.THIN);
// 忽略表头
if (cell.getRowIndex() > 0) {
// 底色
coloring(context, writeCellStyle, cell, curRowIndex, curColIndex);
}
}
/**
* 着色
*
* @param writeCellStyle
* @param cell
* @param curRowIndex 当前行
* @param curColIndex 当前列
*/
private void coloring(CellWriteHandlerContext context, WriteCellStyle writeCellStyle, Cell cell, int curRowIndex, int curColIndex) {
// 设置单元格颜色
// 拿到当前行的所有数据
Cell curInDateCell = cell.getSheet().getRow(curRowIndex).getCell(0); // 唯一编号
double id = curInDateCell.getNumericCellValue();
// 完整数据
HashMap<String, Object> flat = new HashMap<>();
flat.put("id", (long) id);
TestMetLineFe2o3Export fe2o3Export = excelFillCellMergeStrategy.searcher.searchFirst(TestMetLineFe2o3Export.class, flat);
// 渲染入场批号的颜色
if (cell.getColumnIndex() == 4) {
coloringAction(fe2o3Export.getTestMetInnumStandardColor(), writeCellStyle);
// 加批注
noteAction(context, cell, fe2o3Export.getTestMetInnumStandardLevel());
}
// 氯根着色
if (cell.getColumnIndex() == 7) {
coloringAction(fe2o3Export.getLgStandardColor(), writeCellStyle);
noteAction(context, cell, fe2o3Export.getLgStandardLevel());
}
// 水分着色
if (cell.getColumnIndex() == 8) {
coloringAction(fe2o3Export.getWaterStandardColor(), writeCellStyle);
noteAction(context, cell, fe2o3Export.getWaterStandardLevel());
}
// 粒度着色
if (cell.getColumnIndex() == 10) {
coloringAction(fe2o3Export.getLdStandardColor(), writeCellStyle);
noteAction(context, cell, fe2o3Export.getLdStandardLevel());
}
// Na2O着色
if (cell.getColumnIndex() == 17) {
coloringAction(fe2o3Export.getNa2oStandardColor(), writeCellStyle);
noteAction(context, cell, fe2o3Export.getNa2oStandardLevel());
}
// Al2O3着色
if (cell.getColumnIndex() == 19) {
coloringAction(fe2o3Export.getAl2o3StandardColor(), writeCellStyle);
noteAction(context, cell, fe2o3Export.getAl2o3StandardLevel());
}
// SiO2着色
if (cell.getColumnIndex() == 20) {
coloringAction(fe2o3Export.getSio2StandardColor(), writeCellStyle);
noteAction(context, cell, fe2o3Export.getSio2StandardLevel());
}
// CaO着色
if (cell.getColumnIndex() == 24) {
coloringAction(fe2o3Export.getCaoStandardColor(), writeCellStyle);
noteAction(context, cell, fe2o3Export.getCaoStandardLevel());
}
// Cr2O3着色
if (cell.getColumnIndex() == 26) {
coloringAction(fe2o3Export.getCr2o3StandardColor(), writeCellStyle);
noteAction(context, cell, fe2o3Export.getCr2o3StandardLevel());
}
// MnO着色
if (cell.getColumnIndex() == 27) {
coloringAction(fe2o3Export.getMnoStandardColor(), writeCellStyle);
noteAction(context, cell, fe2o3Export.getMnoStandardLevel());
}
// Fe2O3着色
if (cell.getColumnIndex() == 28) {
coloringAction(fe2o3Export.getFe2o3StandardColor(), writeCellStyle);
noteAction(context, cell, fe2o3Export.getFe2o3StandardLevel());
}
}
/**
* 批注
*/
private void noteAction(CellWriteHandlerContext context, Cell cell, String content) {
if (StrUtil.isBlank(content)) {
return;
}
Sheet sheet = context.getWriteSheetHolder().getSheet();
ClientAnchor anchor = new XSSFClientAnchor();
//关键修改
anchor.setDx1(0);
anchor.setDx2(0);
anchor.setDy1(0);
anchor.setDy2(0);
anchor.setCol1(cell.getColumnIndex());
anchor.setRow1(cell.getRowIndex());
anchor.setCol2(cell.getColumnIndex());
anchor.setRow2(cell.getRowIndex());
Drawing<?> drawingPatriarch = sheet.createDrawingPatriarch();
Comment cellComment = drawingPatriarch.createCellComment(anchor);
cellComment.setString(new XSSFRichTextString(content));
cell.setCellComment(cellComment);
}
/**
* 着色动作
*/
private void coloringAction(String color, WriteCellStyle writeCellStyle) {
if (color == null) {
return;
}
Integer r = null;
Integer g = null;
Integer b = null;
//
if (color.startsWith("#")) {
int[] ints = HexToRGB.hexToRGB(color);
r = ints[0];
g = ints[1];
b = ints[2];
} else {
List<String> all01 = ReUtil.findAll("(?<=\\().*?(?=\\))", color, 0);
if (all01 != null && all01.size() > 0 && all01.get(0).split(",").length >= 3) {
String[] split = all01.get(0).split(",");
// RGB颜色转换
r = Integer.parseInt(split[0].trim());
g = Integer.parseInt(split[1].trim());
b = Integer.parseInt(split[2].trim());
}
}
if (r != null && g != null && b != null) {
HSSFWorkbook wb = new HSSFWorkbook();
HSSFPalette palette = wb.getCustomPalette();
HSSFColor hssfColor = palette.findSimilarColor(r, g, b);
// writeCellStyle.setFillForegroundColor(IndexedColors.RED.getIndex());
writeCellStyle.setFillForegroundColor(hssfColor.getIndex());
writeCellStyle.setFillPatternType(FillPatternType.SOLID_FOREGROUND);
}
}
private void mergeWithPrevRow(WriteSheetHolder writeSheetHolder, Cell cell, int curRowIndex, int curColIndex) {
//获取当前行的当前列的数据和上一行的当前列列数据，通过上一行数据是否相同进行合并
Object curData = cell.getCellTypeEnum() == CellType.STRING ? cell.getStringCellValue() :
cell.getNumericCellValue();
Cell preCell = cell.getSheet().getRow(curRowIndex - 1).getCell(curColIndex);
Object preData = preCell.getCellTypeEnum() == CellType.STRING ? preCell.getStringCellValue() :
preCell.getNumericCellValue();
// 如果是日期列,即第一列，只要相同就合并
if (cell.getColumnIndex() == 1) {
if (curData.equals(preData)) {
Sheet sheet = writeSheetHolder.getSheet();
List<CellRangeAddress> mergeRegions = sheet.getMergedRegions();
boolean isMerged = false;
for (int i = 0; i < mergeRegions.size() && !isMerged; i++) {
CellRangeAddress cellRangeAddr = mergeRegions.get(i);
// 若上一个单元格已经被合并，则先移出原有的合并单元，再重新添加合并单元
if (cellRangeAddr.isInRange(curRowIndex - 1, curColIndex)) {
sheet.removeMergedRegion(i);
cellRangeAddr.setLastRow(curRowIndex);
sheet.addMergedRegion(cellRangeAddr);
isMerged = true;
}
}
// 若上一个单元格未被合并，则新增合并单元
if (!isMerged) {
CellRangeAddress cellRangeAddress = new CellRangeAddress(curRowIndex - 1, curRowIndex, curColIndex,
curColIndex);
sheet.addMergedRegion(cellRangeAddress);
}
}
} else {
// 如果日期和批号与上一行的日期和批号相同。则进行当前行列的合并
// 当前行的日期和批号
Cell curInDateCell = cell.getSheet().getRow(curRowIndex).getCell(1);
Object curInDate = curInDateCell.getCellTypeEnum() == CellType.STRING ? curInDateCell.getStringCellValue() : curInDateCell.getNumericCellValue();
Cell curInNumCell = cell.getSheet().getRow(curRowIndex).getCell(4);
Object curInNum = curInNumCell.getCellTypeEnum() == CellType.STRING ? curInNumCell.getStringCellValue() : curInNumCell.getNumericCellValue();
// 上一行的日期和批号
Cell preInDateCell = cell.getSheet().getRow(curRowIndex - 1).getCell(1);
Object preInDate = preInDateCell.getCellTypeEnum() == CellType.STRING ? preInDateCell.getStringCellValue() : preInDateCell.getNumericCellValue();
Cell preInNumCell = cell.getSheet().getRow(curRowIndex - 1).getCell(4);
Object preInNum = preInNumCell.getCellTypeEnum() == CellType.STRING ? preInNumCell.getStringCellValue() : preInNumCell.getNumericCellValue();
if (curInDate.equals(preInDate) && curInNum.equals(preInNum)) {
Sheet sheet = writeSheetHolder.getSheet();
List<CellRangeAddress> mergeRegions = sheet.getMergedRegions();
boolean isMerged = false;
for (int i = 0; i < mergeRegions.size() && !isMerged; i++) {
CellRangeAddress cellRangeAddr = mergeRegions.get(i);
// 若上一个单元格已经被合并，则先移出原有的合并单元，再重新添加合并单元
if (cellRangeAddr.isInRange(curRowIndex - 1, curColIndex)) {
sheet.removeMergedRegion(i);
cellRangeAddr.setLastRow(curRowIndex);
sheet.addMergedRegion(cellRangeAddr);
isMerged = true;
}
}
// 若上一个单元格未被合并，则新增合并单元
if (!isMerged) {
CellRangeAddress cellRangeAddress = new CellRangeAddress(curRowIndex - 1, curRowIndex, curColIndex,
curColIndex);
sheet.addMergedRegion(cellRangeAddress);
}
}
}
}
}