最近需要在项目里集成一个excel检错的功能，对excel里的数据校验错误的单元格数据标记背景色，去年年初做大数据量excel操作的时候选用了easyexcel, 研究了一下里面对单元格的样式定义支持不太友好，但是这个工具用起来个人感觉挺爽，所以又去研究了下easyexcel的新功能，看了下支持的功能已经很丰富，已经可以操作自定义样式了，应该是从19年10月份更新的2.1.0版本开始支持，附上easyexcel的git地址：https://github.com/alibaba/easyexcel

我这里是选用的版本是2.1.6，附上语雀参考说明：https://www.yuque.com/easyexcel/doc/write#591ee418：

里面功能挺丰富的，自定义格式转换、自定义样式、图片、插入批注、注解操作等，这里只把这次用的自定义样式做为记录：

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>easyexcel</artifactId>
    <version>2.1.6</version>
</dependency>

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.extern.slf4j.Slf4j;
import org.apache.poi.ss.usermodel.*;

import java.util.List;

/**
 * @Desc 自定义拦截器操作单元格样式
 * @Author wadu
 * @Date 2020/3/27
 * @Version 1.0
 **/
@Slf4j
public class CustomCellWriteHandle implements CellWriteHandler {
    int[][] checks = {};

    public CustomCellWriteHandle() {
    }

    public CustomCellWriteHandle(int[][] checks ) {
        this.checks = checks;
    }

    @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(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, List<CellData> list, Cell cell, Head head, Integer integer, Boolean aBoolean) {
//        log.info("第{}行每{}列！" , cell.getRowIndex(), cell.getColumnIndex());
        Workbook workbook = writeSheetHolder.getSheet().getWorkbook();
        CellStyle cellStyle = CellStyleUtil.cellStyle(workbook);
        //根据校验结果设置单元格文字颜色
        if(checks[cell.getRowIndex()][cell.getColumnIndex()] == 1){
            //设置单元格背景色
//            cellStyle.setFillForegroundColor(IndexedColors.RED.getIndex());
            Font font = workbook.createFont();
            font.setColor(IndexedColors.RED.getIndex());
            //设置背景色
            
            cellStyle.setFont(font);
        }
        cell.setCellStyle(cellStyle);
    }

}

public class CellStyleUtil {
    /**
     *  通用样式
     * @param workbook
     * @return
     */
    public static CellStyle cellStyle(Workbook workbook) {
        CellStyle cellStyle = workbook.createCellStyle();
        //居中
        cellStyle.setAlignment(HorizontalAlignment.LEFT);
        cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
        cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        cellStyle.setFillForegroundColor(IndexedColors.WHITE.getIndex());
        //设置边框
        cellStyle.setBorderBottom(BorderStyle.THIN);
        cellStyle.setBorderLeft(BorderStyle.THIN);
        cellStyle.setBorderRight(BorderStyle.THIN);
        cellStyle.setBorderTop(BorderStyle.THIN);
        return cellStyle;
    }


}

@Test
    public void test2(){
       String fileName= "D:\\tmp\\"+ System.currentTimeMillis()+".xlsx";
        int[][] ints = new int[11][11];
        ints[2][3] = 1;
        ints[1][2] = 1;
        ints[3][7] = 1;
        EasyExcel.write(fileName, CheckDictDTO.class)
                .registerWriteHandler(new CustomCellWriteHandle(ints))
                .sheet("check1")
                .doWrite(data());
    }

    private List data() {
        List<CheckDictDTO> responses = new ArrayList<>();
        for (int i = 1; i <= 5; i++) {
//            CheckDictDTO response = CheckDictDTO.builder().word("abc" + i)
//                    .ipa("test1")
//                    .kk("test2").build();
//            responses.add(response);
        }
        return responses;
    }