Easypoi export interlaced style settings

export excel You need to set the interlaced background style , Here's the picture ：

1、ExcelUtil Export tool class

/** *  Export set interlaced background color  * @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);
 }

 /** *  Set the background color for even rows  */
 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){
    // The title uses the global title style , Don't set the style separately , So exclude the title 
             for(int j = 0; j < row.getPhysicalNumberOfCells(); j ++) {
    
                 Cell cell = row.getCell(j);
                 cell.setCellStyle(styles);
             }
         }
     }
 }

/** *  download  * @param fileName  File name  * @param response * @param workbook excel data  */
 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 Style tool class

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;
    /** *  Headline style  */
    private CellStyle headerStyle;
    /** *  Each column header style  */
    private CellStyle titleStyle;
    /** *  Data line style  */
    private CellStyle styles;

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

    /** *  Initialize style  * * @param workbook */
    private void init(Workbook workbook) {
    
        this.headerStyle = initHeaderStyle(workbook);
        this.titleStyle = initTitleStyle(workbook);
        this.styles = initStyles(workbook);
    }

    /** *  Headline style  * * @param color * @return */
    @Override
    public CellStyle getHeaderStyle(short color) {
    
        return headerStyle;
    }

    /** *  Each column header style  * * @param color * @return */
    @Override
    public CellStyle getTitleStyle(short color) {
    
        return titleStyle;
    }

    /** *  Data line style  * * @param parity  Can be used to represent even and odd rows  * @param entity  The data content  * @return  style  */
    @Override
    public CellStyle getStyles(boolean parity, ExcelExportEntity entity) {
    
        return styles;
    }

    /** *  Get style method  * * @param dataRow  data row  * @param obj  object  * @param data  data  */
    @Override
    public CellStyle getStyles(Cell cell, int dataRow, ExcelExportEntity entity, Object obj, Object data) {
    
        return getStyles(true, entity);
    }

    /** *  The style settings used by the template  */
    @Override
    public CellStyle getTemplateStyles(boolean isSingle, ExcelForEachParams excelForEachParams) {
    
        return null;
    }

    /** *  Set interlaced background color  */
    public static CellStyle getStyles(Workbook workbook,boolean isBold,short size) {
    
        CellStyle style = getBaseCellStyle(workbook);
        style.setFont(getFont(workbook, size,isBold));
        // Background color 
        style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        style.setDataFormat(STRING_FORMAT);
        return style;
    }

    /** *  initialization -- Headline style  * * @param workbook * @return */
    private CellStyle initHeaderStyle(Workbook workbook) {
    
        CellStyle style = getBaseCellStyle(workbook);
        style.setFont(getFont(workbook, FONT_SIZE_TWELVE, true));
        return style;
    }

    /** *  initialization -- Each column header style  * * @param workbook * @return */
    private CellStyle initTitleStyle(Workbook workbook) {
    
        CellStyle style = getBaseCellStyle(workbook);
        style.setFont(getFont(workbook, FONT_SIZE_ELEVEN, true));
        // Background color 
        style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        return style;
    }

    /** *  initialization -- Data line style  * * @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;
    }

    /** *  Basic style  * * @return */
    private static CellStyle getBaseCellStyle(Workbook workbook) {
    
        CellStyle style = workbook.createCellStyle();
        // Under the frame 
        style.setBorderBottom(BorderStyle.THIN);
        // The left margin 
        style.setBorderLeft(BorderStyle.THIN);
        // On the border 
        style.setBorderTop(BorderStyle.THIN);
        // Right margin 
        style.setBorderRight(BorderStyle.THIN);
        // Horizontal center 
        style.setAlignment(HorizontalAlignment.CENTER);
        // Center up and down 
        style.setVerticalAlignment(VerticalAlignment.CENTER);
        // Set auto wrap 
        style.setWrapText(true);
        return style;
    }

    /** *  Font style  * * @param size  font size  * @param isBold  Is it bold  * @return */
    private static Font getFont(Workbook workbook, short size, boolean isBold) {
    
        Font font = workbook.createFont();
        // Font style 
        font.setFontName(" Song style ");
        // Is it bold 
        font.setBold(isBold);
        // font size 
        font.setFontHeightInPoints(size);
        return font;
    }
}

3、 export

/** *  export  */
 @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," User list ",response);
 }