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  • 2021-12-27 14:53:31

    合并行:

    import com.alibaba.excel.metadata.CellData;
    import com.alibaba.excel.metadata.Head;
    import com.alibaba.excel.write.handler.CellWriteHandler;
    import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
    import com.alibaba.excel.write.metadata.holder.WriteTableHolder;
    import lombok.Data;
    import org.apache.poi.ss.usermodel.Cell;
    import org.apache.poi.ss.usermodel.CellType;
    import org.apache.poi.ss.usermodel.Row;
    import org.apache.poi.ss.usermodel.Sheet;
    import org.apache.poi.ss.util.CellRangeAddress;
    
    import java.util.List;
    
    /**
     * 合并单元格
     */
    @Data
    public class ExcelFillCellMergeStrategy implements CellWriteHandler {
        /**
         * 合并字段的下标
         */
        private int[] mergeColumnIndex;
        /**
         * 合并几行
         */
        private int mergeRowIndex;
    
        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) {
    
        }
    
    
        public void afterCellDataConverted(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder,
                                           CellData cellData, Cell cell, Head head, Integer integer, Boolean aBoolean) {
    
        }
    
        @Override
        public void afterCellDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder,
                                     List<CellData> list, Cell cell, Head head, Integer integer, Boolean aBoolean) {
            //当前行
            int curRowIndex = cell.getRowIndex();
            //当前列
            int curColIndex = cell.getColumnIndex();
    
            if (curRowIndex > mergeRowIndex) {
                for (int i = 0; i < mergeColumnIndex.length; i++) {
                    if (curColIndex == mergeColumnIndex[i]) {
                        mergeWithPrevRow(writeSheetHolder, cell, curRowIndex, curColIndex);
                        break;
                    }
                }
            }
    
        }
    
        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();
    
            // 比较当前行的第一列的单元格与上一行是否相同,相同合并当前单元格与上一行
            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);
                }
            }
        }
    }
    

    合并列:

    import com.alibaba.excel.metadata.CellData;
    import com.alibaba.excel.metadata.Head;
    import com.alibaba.excel.write.handler.CellWriteHandler;
    import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
    import com.alibaba.excel.write.metadata.holder.WriteTableHolder;
    import org.apache.poi.ss.usermodel.Cell;
    import org.apache.poi.ss.usermodel.Row;
    import org.apache.poi.ss.usermodel.Sheet;
    import org.apache.poi.ss.util.CellRangeAddress;
    
    import java.util.List;
    
    /**
     * 自定义合并某行某列
     */
    public class ExcelFillCellMergePrevCol implements CellWriteHandler {
    
        /**
         * 合并字段的下标
         */
        private int[] mergeColumnIndex;
    
        //合并哪一行
        private int row;
    
        //合并多少列
        private  int num;
    
        public ExcelFillCellMergePrevCol(int[] mergeColumnIndex, int row, int num) {
            this.mergeColumnIndex = mergeColumnIndex;
            this.row = row;
            this.num = num;
        }
    
        @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 afterCellDataConverted(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, CellData cellData, Cell cell, Head head, Integer integer, Boolean aBoolean) {
    
        }
    
        @Override
        public void afterCellDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, List<CellData> list, Cell cell, Head head, Integer integer, Boolean aBoolean) {
            //当前行
            int curRowIndex = cell.getRowIndex();
            //当前列
            int curColIndex = cell.getColumnIndex();
    
            //合并最后一行指定列
            if (curRowIndex == row) {
    
                for (int i = 0; i < mergeColumnIndex.length; i++) {
                    if (curColIndex == mergeColumnIndex[i]) {
                        // 合并最后一行 ,列
                        mergeWithPrevCol(writeSheetHolder, cell, curRowIndex, curColIndex);
                    }
                }
    
            }
        }
        private void mergeWithPrevCol(WriteSheetHolder writeSheetHolder, Cell cell, int curRowIndex, int curColIndex) {
            Sheet sheet = writeSheetHolder.getSheet();
            CellRangeAddress cellRangeAddress = new CellRangeAddress(curRowIndex, curRowIndex, curColIndex, curColIndex + num);
            sheet.addMergedRegion(cellRangeAddress);
        }
    
    }

    更多相关内容
  • easyexcel合并单元格

    2022-02-11 09:45:49
    原文连接...
  • easyExcel导出合并单元格策略 WriteSheet writeSheet = EasyExcel.writerSheet(i, "Sheet" + (i + 1)) .registerWriteHandler(new CustomCellWriteHandler()) //设置合并单元格策略 .registerWriteHandler(new ...
  • easyexcel 合并单元格

    千次阅读 2020-07-25 21:15:07
    easyexcel合并单元格

    easyexcel 合并单元格

     

     

    *********************

    相关注解

     

    ContentLoopMerge:标注在字段上

    @Target({ElementType.FIELD})
    @Retention(RetentionPolicy.RUNTIME)
    @Inherited
    public @interface ContentLoopMerge {
    
        int eachRow() default -1;      //合并行
        int columnExtend() default 1;  //合并列
    }
    

     

    OnceAbsoluteMerge:标注在类上

    @Target({ElementType.TYPE})
    @Retention(RetentionPolicy.RUNTIME)
    @Inherited
    public @interface OnceAbsoluteMerge {
    
        int firstRowIndex() default -1;      //初始行
        int lastRowIndex() default -1;       //最后一行
    
        int firstColumnIndex() default -1;   //初始列
        int lastColumnIndex() default -1;    //最后一列
    }
    

     

     

    *********************

    示例

     

    Test

    @Data
    class Book{
    
        @ContentLoopMerge(eachRow = 2)
        private Integer id;
    
        private String name;
    
        private Double price;
    }
    
    public class Test {
    
        private static final String write_path="e:"+ File.separator+"java"+File.separator+"easyexcel"+File.separator+"write.xlsx";
    
        public static void write(){
            List<Book> list=new ArrayList<>();
    
            for (int i=0;i<5;i++){
                Book book=new Book();
                book.setId(i);
                book.setName("海贼王"+i);
                book.setPrice((double)(i+10));
    
                list.add(book);
            }
    
            EasyExcel.write(write_path,Book.class).sheet().doWrite(list);
        }
    
        public static void main(String[] args){
            write();
        }
    }
    

     

    ****************

    使用测试

     

                            

     

     

    展开全文
  • easyexcel 合并单元格-表头

    千次阅读 2021-02-01 09:04:18
    1. 添加依赖 <dependency> <groupId>com.alibaba</groupId> <artifactId>easyexcel</artifactId> <version>...2.表头(含单元格合并) public List<

    1. 添加依赖

        <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>easyexcel</artifactId>
                <version>2.2.6</version>
            </dependency>

    2.表头(含单元格合并)

     public List<List<String>> ExcelHead() {
            List<List<String>> headList = new ArrayList();
    
            headList.add(new ArrayList() {{
                add("时间");
                add("参数名\\回路名");
            }});
            headList.add(new ArrayList() {{
                add("时间"        }});
            headList.add(new ArrayList() {{
                add("时间");
                add("电流I(A)");
            }});
            headList.add(new ArrayList() {{
                add("环境温度:" + temperature);
                add("相电压U");
            }});
            headList.add(new ArrayList() {{
                add("环境温度");
                add("线电压U");
            }});
            headList.add(new ArrayList() {{
                   add("环境温度");
                add("频率(Hz)");
            }});
            headList.add(new ArrayList() {{
                add("环境湿度");
                add("开关分合(分\\合)");
            }});
            headList.add(new ArrayList() {{
                 add("环境湿度");
                add("总有功功率(kW)");
            }});
            headList.add(new ArrayList() {{
                add("抄表记录单");
                add("总无功功率(kVar)");
            }});
            headList.add(new ArrayList() {{
                add("抄表记录单");
                add("总功率因数");
            }});
            headList.add(new ArrayList() {{
                add("抄表记录单");
                add("正向有功电能(kW.h)");
            }});
            headList.add(new ArrayList() {{
                add("项目");
                add("正向无功电能(kVar.h)");
            }});
            headList.add(new ArrayList() {{
                add("表单号");
                add("所属变压器");
            }});
            headList.add(new ArrayList() {{
                add("表单号");
                add("变压器温度(℃)");
            }});
    
            return headList;
        }

    3. 数据逻辑

        List<HashMap> data = statisticmapper.runreport(statisticdto);
            for (int i = 0; i < data.size(); i++) {
                String id = data.get(i).get("id").toString();
                String name = data.get(i).get("equipment_name").toString();
                if (data.get(i).get("paramid") == null) continue;
                String paramid = data.get(i).get("paramid").toString();
                String point_id = data.get(i).get("point_id").toString();
                String value = data.get(i).get("value").toString();
                switch (paramid) {
                    case "e2fa092c-6146-11eb-82f0-6c2b59bec1ff":
                        temperature = value + "℃ ";
                        continue;
                    case "70536171-6147-11eb-82f0-6c2b59bec1ff":
                        humidity = value + "%";
                        continue;
                }
    
                if (!devicecheck.contains(id)) {
                    tosave.add(rowdata(name, "A相"));
                    tosave.add(rowdata(name, "B相"));
                    tosave.add(rowdata(name, "C相"));
                    devicecheck.add(id);
                }
    
                if (dic.containsKey(id + point_id)) continue;
                dic.put(id + point_id, i);
    
                int index = devicecheck.indexOf(id) * 3;
                switch (paramid) {
                    case "069d9c73-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index).set(5, value);
                        tosave.get(index + 1).set(5, value);
                        tosave.get(index + 2).set(5, value);
                        break;
                    case "068d17d6-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index).set(7, value);
                        tosave.get(index + 1).set(7, value);
                        tosave.get(index + 2).set(7, value);
                        break;
                    case "071ce9e3-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index).set(8, value);
                        tosave.get(index + 1).set(8, value);
                        tosave.get(index + 2).set(8, value);
                        break;
                    case "05b23645-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index).set(9, value);
                        tosave.get(index + 1).set(9, value);
                        tosave.get(index + 2).set(9, value);
                        break;
                    case "062ee255-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index).set(10, value);
                        tosave.get(index + 1).set(10, value);
                        tosave.get(index + 2).set(10, value);
                        break;
                    case "06dd3edb-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index).set(11, value);
                        tosave.get(index + 1).set(11, value);
                        tosave.get(index + 2).set(11, value);
                        break;
                    case "061fa440-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index).set(2, value);
                        break;
                    case "06fa867e-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index).set(3, value + "kV");
                        break;
                    case "05952cc2-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index).set(4, "Uab(" + value + "kV)");
                        break;
                    case "06805737-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index + 1).set(2, value);
                        break;
                    case "05f1ca1b-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index + 1).set(3, value + "kV");
                        break;
                    case "06ab9dbf-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index + 1).set(4, "Uab(" + value + "kV)");
                        break;
                    case "0604e966-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index + 2).set(2, value);
                        break;
                    case "058946a7-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index + 2).set(3, value + "kV");
                        break;
                    case "06b858c6-6148-11eb-82f0-6c2b59bec1ff":
                        tosave.get(index + 2).set(4, "Uab(" + value + "kV)");
                        break;
                }
            }
     public List<String> rowdata(String name, String type) {
            return new ArrayList() {{
                add(name);
                add(type);
                add("-");
                add("-");
                add("-");
                add("-");
                add("-");
                add("-");
                add("-");
                add("-");
                add("-");
                add("-");
                add("无");
                add("-");
            }};
        }

    3.excel

       List<List<String>> head = ExcelHead();
    
            EasyExcel.write(fileUrl).head(head).sheet(sheetname)
               //     .registerWriteHandler(StyleStrategy())
               //     .registerWriteHandler(new ReportMergeStrategy(devicecheck.size()))//自定义合并 单元格
               //     .registerWriteHandler(new RowWriteHandler())
                    .doWrite(tosave);

    4. 结果

    时间环境温度环境湿度抄表记录单项目表单号
    参数名\回路名电流I(A)相电压U线电压U频率(Hz)开关分合(分\合)总有功功率(kW)总无功功率(kVar)总功率因数正向有功电能(kW.h)正向无功电能(kVar.h)所属变压器变压器温度(℃)
    1#高压出线A相0.0010.54kVUab(10.54kV)50.00-0.00-0.00---
    1#高压出线B相0.0010.52kVUab(10.50kV)50.00-0.00-0.00---
    1#高压出线C相0.0010.50kVUab(10.52kV)50.00-0.00-0.00---

     

    展开全文
  • EasyExcel合并单元格(一)

    千次阅读 2021-02-01 01:21:09
    前言 导出excel,这里介绍每隔2行... * 合并单元格 * @date 01/31/2021 03:11 */ public class Demo { /** * 合并单元格 */ @Test public void testMyMergeWrite() { // String fileName = TestFileUtil.getPat

    前言

    导出excel,介绍如何使用LoopMergeStrategy实现简单的合并

    效果

    每隔2行,合并一次

    在这里插入图片描述

    横向合并

    在这里插入图片描述

    横向和纵向合并

    在这里插入图片描述

    实现

    导入依赖

     <!-- https://mvnrepository.com/artifact/com.alibaba/easyexcel -->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>easyexcel</artifactId>
                <version>2.2.7</version>
            </dependency>
    
            <!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
            <dependency>
                <groupId>com.google.guava</groupId>
                <artifactId>guava</artifactId>
                <version>30.1-jre</version>
            </dependency>
    
            <!-- springboot test启动器 -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
            </dependency>
    

    单元测试

    /**
     * 合并单元格
     * @date 01/31/2021 03:11
     */
    public class Demo {
    
        /**
         * 合并单元格
         */
        @Test
        public void testMyMergeWrite() {
    
            String fileName = "/Users/quanlinglong/Downloads/mergeDemo/" + "mymergeWrite" + System.currentTimeMillis() + ".xlsx";
            System.out.println("fileName = " + fileName);
    
            // 每隔2行合并一次,横向合并1列,从第0列开始
    //        LoopMergeStrategy loopMergeStrategy = new LoopMergeStrategy(2, 1, 0);
            // 上面的等价于
    //        LoopMergeStrategy loopMergeStrategy = new LoopMergeStrategy(2, 0);
    
            // 从第columnIndex列开始,向右合并(columnExtend-1)列
    //        LoopMergeStrategy loopMergeStrategy = new LoopMergeStrategy(1, 2, 0);
    
            // 合并2行2列
            LoopMergeStrategy loopMergeStrategy = new LoopMergeStrategy(2, 2, 0);
    
            EasyExcel.write(fileName, WriteDemo.DemoData.class)
                    .registerWriteHandler(loopMergeStrategy)
                    .sheet("aaa")
                    .doWrite(data());
        }
    
        private List<List<Object>> data() {
            List<List<Object>> result = new ArrayList<>();
            for (int i = 0; i < 3; i++) {
                result.add(Lists.newArrayList("标题" + i, new Date(), i * 0.1));
            }
            return result;
        }
    }
    
    

    分析LoopMergeStrategy类,它继承AbstractRowWriteHandler,在afterRowDispose方法里对每行做了处理,LoopMergeStrategy的构造函数传参是用来设置合并范围CellRangeAddress,再添加到当前sheet。

    public void afterRowDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row, Integer relativeRowIndex, Boolean isHead) {
            if (!isHead) {
                if (relativeRowIndex % this.eachRow == 0) {
                    CellRangeAddress cellRangeAddress = new CellRangeAddress(row.getRowNum(), row.getRowNum() + this.eachRow - 1, this.columnIndex, this.columnIndex + this.columnExtend - 1);
                    writeSheetHolder.getSheet().addMergedRegionUnsafe(cellRangeAddress);
                }
    
            }
        }
    

    CellRangeAddress构造函数有4个参数
    参数
    0:合并起始行
    1:合并终止行
    2:合并起始列
    3:合并终止列

     CellRangeAddress cellRangeAddress = new CellRangeAddress(row.getRowNum(), row.getRowNum() + this.eachRow - 1, this.columnIndex, this.columnIndex + this.columnExtend - 1);
     writeSheetHolder.getSheet().addMergedRegionUnsafe(cellRangeAddress);
    

    构造函数传进来的eachRow, columnExtend, columnIndex,都用在这里了

    相关链接
    easyexcel 动态合并单元格

    展开全文
  • easyexcel 合并单元格(非注解)

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  • EasyExcel导出合并单元格

    千次阅读 2021-03-01 15:09:30
    //需要做合并单元格,对应的列数 int[] mergeColumeIndex = {0,1,2,3,4,5,6,7,8,9,10,11}; 以上可多可少 , 看自己实际需要 。 然后就是, EasyExcel.write(response.getOutputStream(), 导出.class)
  • EasyExcel 单元格合并

    千次阅读 2022-02-23 09:09:14
    countryCount 合并行数集合。 如下图 list则为6,5。同理productTypeCount import com.alibaba.excel.metadata.Head; import com.alibaba.excel.write.merge.AbstractMergeStrategy; import org.apache.poi.ss....
  • easyexcel 动态合并单元格

    千次阅读 2020-12-01 14:54:08
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  • 自定义EasyExcel单元格合并策略,动态合并单元格
  • EasyExcel自定义合并单元格导出

    热门讨论 2021-07-27 15:56:59
    根据业务需求会有导出中需要合并的功能,但是当根据数据合并时又不能使用注解来进行合并,只能自定义合并,根据官网中介绍可以使用第二种方式,官网地址https://www.yuque.com/easyexcel/doc/write#cac25459 ...
  • 目前网上找到的EasyExcel自定义合并单元格都是ExcelFillCellMergeStrategy,这个工具类只要下一行的cell和上一行的cell内容相同就会合并,不符合目前的需求。本例也是在此基础上进行逻辑修改。 参考链接。 测试代码 ...
  • 相信很多同学都用过EasyExcel做过导出功能,现在阿Q也碰到一个需求,就是要把导出的Excel中内容相同的纵向单元格合并,然后还需要给Excel设置动态标题,再进行格式定义调整,现将这个功能的实现过程记录下,给同学...
  • EasyExcel导入存在合并单元格的Excel

    千次阅读 2021-08-09 19:50:56
    因为POI/EasyExcel合并单元格的数据只读取一次,需要把为空的单元格也赋值,这是核心技术难点。 对数据进行校验、封装然后写入数据库 存在校验不通过的数据返回给前端,所有数据校验通过写入数据库。 相关代码 ...
  • easyexcel 导出导入合并单元格的表格

    千次阅读 2021-09-29 18:04:58
    easyexcel 导入、导出合并单元格的表格 现在经常遇到导入导出表格,又有列重复的数据,想要合并,手动有太慢的(所以直接导入或导入和并的表格) 1. 引入pom 引入pom 参考 java导入Excel(使用阿里巴巴的easyexcel...
  • /** * 合并单元格 */ @Data public class ExcelFillCellMergeStrategy implements CellWriteHandler { /** * 合并字段的下标 */ private int[] mergeColumnIndex; /** * 合并几行 */ private int mergeRowIndex; ...
  • poi导入/导出Excel表格,合并单元格的读取和设置
  • 1 Maven配置文件 2 MergeCellModel 3 CustomMergeCellHandler 4 调试代码 5 调试结果 注: 1 Maven配置文件 cn.hutool hutool-all 5.5.1 com.alibaba easyexcel 2.2.8 2 MergeCellModel 合并单元格信息...
  • EasyExcel填充时合并单元格

    千次阅读 热门讨论 2021-01-20 17:03:41
    由于填充时第二行开始,easyexcel不会自动合并单元格,所以需要自定义handler根据上一行的合并信息自行合并 public class MyHandler extends AbstractMergeStrategy { @Override protected void merge(Sheet ...

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