easyexcel导出&自定义策略合并单元格

easyexcel导出&自定义策略合并单元格

效果图

导入easyexcel依赖 pom

		<dependency>
            <groupId>com.alibabagroupId>
            <artifactId>easyexcelartifactId>
            <version>2.2.6version>
        dependency>

导出VO对象

@Data
@TableName("t_person")
public class TPerson implements Serializable {
    @ExcelIgnore // 用该注解标记忽略字段
    private Long id;

    @ExcelProperty({"人员信息","姓名"}) // 标题，写多个标题可以让标题具有层级关系
    private String personName;

    @ExcelProperty({"人员信息","年龄"})
    private Integer age;

    @ExcelProperty({"人员信息","性别"})
    private Integer sex;
 
    @ExcelProperty({"身份证号码"})
    private String idCard;

    @ExcelProperty({"手机号码"})
    private String phoneNumber;

}

导出的service层逻辑

其中使用自定义策略在 .registerWriteHandler(new CustomMergeStrategy())这个方法中，添加自定义策略实现类

	@Override
    public void testExportPersonExcel(HttpServletResponse response) throws IOException {
        List<TPerson> personList = personMapper.selectList(null); // 可更换自己数据源
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf8");
        response.setHeader("Content-disposition", "attachment;filename=" + "全部数据.xlsx" );

        EasyExcel.write(response.getOutputStream())
                .head(TPerson.class)
                .registerWriteHandler(new CustomMergeStrategy()) // 使用自定义策略
                .excelType(ExcelTypeEnum.XLSX)
                .sheet("人员列表")
                .doWrite(personList);
    }

自定义策略

package com.tfxing.persondaily.entity.strategy;
import com.alibaba.excel.write.handler.RowWriteHandler;
import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
import com.alibaba.excel.write.metadata.holder.WriteTableHolder;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;

public class CustomMergeStrategy implements RowWriteHandler {


    public CustomMergeStrategy() {}

       @Override
    public void beforeRowCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Integer rowIndex,
                                Integer relativeRowIndex, Boolean isHead) {
        Sheet sheet = writeSheetHolder.getSheet();

    }

    @Override
    public void afterRowCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row,
                               Integer relativeRowIndex, Boolean isHead) {
            Sheet sheet = writeSheetHolder.getSheet();
    }

    @Override
    public void afterRowDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row,
                                Integer relativeRowIndex, Boolean isHead) {
        
       	// 处理标题，可以自定义标题
       	titleHandle(writeSheetHolder.getSheet(),"titleName","titleName2"); 
        
       	// 合并单元格
        // 参数说明：开始行，结束行，开始列，结束列
        CellRangeAddress cellRangeAddress = new CellRangeAddress(0, 2, 1, 3); // 合并第1-3行，第2-4列
        sheet.addMergedRegionUnsafe(cellRangeAddress);
    }

    private void titleHandle(Sheet sheet, String titleName, String titleName2) {
       	// 设置单元格风格
        Workbook workbook = sheet.getWorkbook();
        Font font = workbook.createFont();
        font.setBold(true); // 字体加粗
        font.setFontHeightInPoints((short)14); // 字体大小14

        CellStyle cellStyle = workbook.createCellStyle();
        cellStyle.setAlignment(HorizontalAlignment.LEFT); // 内容居左
        cellStyle.setFont(font);

        // 将行的标题设置为titleName
        for (int i = 0; i < 7; i++) {
            Cell cell = sheet.getRow(1).getCell(i);
            cell.setCellValue(titleName);
            cell.setCellStyle(cellStyle);
        }

        CellStyle cellStyle1 = workbook.createCellStyle();
        cellStyle1.setAlignment(HorizontalAlignment.RIGHT); // 内容居右
        cellStyle1.setFont(font);

        for (int i = 7; i < 12; i++) {
            Cell cell = sheet.getRow(1).getCell(i);
            cell.setCellValue(titleName2);
            cell.setCellStyle(cellStyle1);
        }


    }

}

参数解析

• writeSheetHolder：
  包含了excel中整个sheet的信息，以下是比较重要有意义的参数：

  • sheet：
    • workbook:
      • stylesSource: 包含了样式风格，例如：fonts:字体大小，borders:边框大小
    • rows: 当前sheet的所有行列表
      • cells: 行中的单元格的列表
  • sheetName：sheet名称
  • writeSheet:

• writeTableHolder：

• rowIndex：当前所处于excel的第几行，从1开始

• relativeRowIndex：去除标题后，当前所处于excel的第几行，从1开始

• isHead：boolean类型，是否为标题

• row：当前行的信息

  • cells: 行中的单元格的列表

测试

将1，2，3列的第4-6行分别合并

for (int i = 0; i < 3; i++) {   
	CellRangeAddress cellRangeAddress = new CellRangeAddress(3, 6, i, i);    	writeSheetHolder.getSheet().addMergedRegionUnsafe(cellRangeAddress);
	}

效果图

后面写的一篇，合并单元格策略，更详细，更清晰
excel单元格合并策略