easypoi导出隔行样式设置

导出excel需要设置隔行背景样式，如下图：

1、ExcelUtil 导出工具类

/** * 导出设置隔行背景色 * @param params * @param list * @param pojoClass * @param fileName * @param response */
 public static void exportExcel( ExportParams params,List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response) throws IOException {
    
     Workbook workbook = ExcelExportUtil.exportExcel(params,pojoClass,list);
     if (workbook != null);
     setRowBackground(workbook);
     downLoadExcel(fileName, response, workbook);
 }

 /** * 偶数行设置背景色 */
 private static void setRowBackground(Workbook workbook){
    
     Sheet sheet = workbook.getSheetAt(0);
     CellStyle styles = ExcelStyleUtil.getStyles(workbook,false,(short) 12);
     for(int i = 0; i <= sheet.getLastRowNum(); i ++) {
    
         Row row = sheet.getRow(i);
         if (i%2==0 && i>0){
    //标题用全局的标题样式，就不单独设置样式了，所以排除标题
             for(int j = 0; j < row.getPhysicalNumberOfCells(); j ++) {
    
                 Cell cell = row.getCell(j);
                 cell.setCellStyle(styles);
             }
         }
     }
 }

/** * 下载 * @param fileName 文件名称 * @param response * @param workbook excel数据 */
 public static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) throws IOException {
    
     try {
    
         response.setCharacterEncoding("UTF-8");
         response.setHeader("content-Type", "application/vnd.ms-excel");
         response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName + "." + ExcelTypeEnum.XLS.getValue(), "UTF-8"));
         workbook.write(response.getOutputStream());
     } catch (Exception e) {
    
         throw new IOException(e.getMessage());
     }
 }

2、ExcelStyleUtil 样式工具类

import cn.afterturn.easypoi.excel.entity.params.ExcelExportEntity;
import cn.afterturn.easypoi.excel.entity.params.ExcelForEachParams;
import cn.afterturn.easypoi.excel.export.styler.IExcelExportStyler;
import org.apache.poi.ss.usermodel.*;

public class ExcelStyleUtil implements IExcelExportStyler {
    
    private static final short STRING_FORMAT = (short) BuiltinFormats.getBuiltinFormat("TEXT");
    private static final short FONT_SIZE_TEN = 12;
    private static final short FONT_SIZE_ELEVEN = 14;
    private static final short FONT_SIZE_TWELVE = 18;
    /** * 大标题样式 */
    private CellStyle headerStyle;
    /** * 每列标题样式 */
    private CellStyle titleStyle;
    /** * 数据行样式 */
    private CellStyle styles;

    public ExcelStyleUtil(Workbook workbook) {
    
        this.init(workbook);
    }

    /** * 初始化样式 * * @param workbook */
    private void init(Workbook workbook) {
    
        this.headerStyle = initHeaderStyle(workbook);
        this.titleStyle = initTitleStyle(workbook);
        this.styles = initStyles(workbook);
    }

    /** * 大标题样式 * * @param color * @return */
    @Override
    public CellStyle getHeaderStyle(short color) {
    
        return headerStyle;
    }

    /** * 每列标题样式 * * @param color * @return */
    @Override
    public CellStyle getTitleStyle(short color) {
    
        return titleStyle;
    }

    /** * 数据行样式 * * @param parity 可以用来表示奇偶行 * @param entity 数据内容 * @return 样式 */
    @Override
    public CellStyle getStyles(boolean parity, ExcelExportEntity entity) {
    
        return styles;
    }

    /** * 获取样式方法 * * @param dataRow 数据行 * @param obj 对象 * @param data 数据 */
    @Override
    public CellStyle getStyles(Cell cell, int dataRow, ExcelExportEntity entity, Object obj, Object data) {
    
        return getStyles(true, entity);
    }

    /** * 模板使用的样式设置 */
    @Override
    public CellStyle getTemplateStyles(boolean isSingle, ExcelForEachParams excelForEachParams) {
    
        return null;
    }

    /** * 设置隔行背景色 */
    public static CellStyle getStyles(Workbook workbook,boolean isBold,short size) {
    
        CellStyle style = getBaseCellStyle(workbook);
        style.setFont(getFont(workbook, size,isBold));
        //背景色
        style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        style.setDataFormat(STRING_FORMAT);
        return style;
    }

    /** * 初始化--大标题样式 * * @param workbook * @return */
    private CellStyle initHeaderStyle(Workbook workbook) {
    
        CellStyle style = getBaseCellStyle(workbook);
        style.setFont(getFont(workbook, FONT_SIZE_TWELVE, true));
        return style;
    }

    /** * 初始化--每列标题样式 * * @param workbook * @return */
    private CellStyle initTitleStyle(Workbook workbook) {
    
        CellStyle style = getBaseCellStyle(workbook);
        style.setFont(getFont(workbook, FONT_SIZE_ELEVEN, true));
        //背景色
        style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        return style;
    }

    /** * 初始化--数据行样式 * * @param workbook * @return */
    private CellStyle initStyles(Workbook workbook) {
    
        CellStyle style = getBaseCellStyle(workbook);
        style.setFont(getFont(workbook, FONT_SIZE_TEN, false));
        style.setDataFormat(STRING_FORMAT);
        return style;
    }

    /** * 基础样式 * * @return */
    private static CellStyle getBaseCellStyle(Workbook workbook) {
    
        CellStyle style = workbook.createCellStyle();
        //下边框
        style.setBorderBottom(BorderStyle.THIN);
        //左边框
        style.setBorderLeft(BorderStyle.THIN);
        //上边框
        style.setBorderTop(BorderStyle.THIN);
        //右边框
        style.setBorderRight(BorderStyle.THIN);
        //水平居中
        style.setAlignment(HorizontalAlignment.CENTER);
        //上下居中
        style.setVerticalAlignment(VerticalAlignment.CENTER);
        //设置自动换行
        style.setWrapText(true);
        return style;
    }

    /** * 字体样式 * * @param size 字体大小 * @param isBold 是否加粗 * @return */
    private static Font getFont(Workbook workbook, short size, boolean isBold) {
    
        Font font = workbook.createFont();
        //字体样式
        font.setFontName("宋体");
        //是否加粗
        font.setBold(isBold);
        //字体大小
        font.setFontHeightInPoints(size);
        return font;
    }
}

3、导出

/** * 导出 */
 @RequestMapping("/export")
 public void export(SysUser query, HttpServletResponse response) throws IOException {
    
     ExportParams params = new ExportParams();
     params.setTitleHeight((short) 15);
     params.setHeight((short) 12);
     params.setStyle(ExcelStyleUtil.class);
     List<SysUser> list = sysUserService.list(query);
     ExcelUtils.exportExcel(params,list, SysUser.class,"用户列表",response);
 }