EasyExcel自定义表头

表头可以根据业务进行设置，然后后续赋值对应的值。

	@Test
    public void easyExcelTest() {
        List<List<String>> heads = Lists.newArrayList();
        heads.add(Lists.newArrayList("表头1"));
        heads.add(Lists.newArrayList("表头2"));
        heads.add(Lists.newArrayList("表头3"));
        heads.add(Lists.newArrayList("表头4"));
        heads.add(Lists.newArrayList("表头5"));

        List<List<String>> contents = Lists.newArrayList();
        for (int i = 0; i <= 10; i++) {
            List<String> content = Lists.newArrayList();
            for (int j = 0; j < 5; j++) {
                content.add("第" + i + "行第" + j + "例内容");
            }
            contents.add(content);
        }

        // 表头样式策略
        WriteCellStyle headWriteCellStyle = new WriteCellStyle();
        // 设置数据格式
        headWriteCellStyle.setDataFormat((short) BuiltinFormats.getBuiltinFormat("m/d/yy h:mm"));
        // 是否换行
        headWriteCellStyle.setWrapped(false);
        // 水平对齐方式
        headWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.LEFT);
        // 垂直对齐方式
        headWriteCellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
        // 前景色
        headWriteCellStyle.setFillForegroundColor(IndexedColors.WHITE.getIndex());
        // 背景色
        headWriteCellStyle.setFillBackgroundColor(IndexedColors.WHITE.getIndex());
        // 设置为1时，单元格将被前景色填充
        headWriteCellStyle.setFillPatternType(FillPatternType.NO_FILL);
        // 控制单元格是否应自动调整大小以适应文本过长时的大小
        headWriteCellStyle.setShrinkToFit(false);
        // 单元格边框类型
        headWriteCellStyle.setBorderBottom(BorderStyle.NONE);
        headWriteCellStyle.setBorderLeft(BorderStyle.NONE);
        headWriteCellStyle.setBorderRight(BorderStyle.NONE);
        headWriteCellStyle.setBorderTop(BorderStyle.NONE);
        // 单元格边框颜色
        headWriteCellStyle.setLeftBorderColor(IndexedColors.BLACK.index);
        headWriteCellStyle.setRightBorderColor(IndexedColors.BLACK.index);
        headWriteCellStyle.setTopBorderColor(IndexedColors.BLACK.index);
        headWriteCellStyle.setBottomBorderColor(IndexedColors.BLACK.index);
        // 字体策略
        WriteFont writeFont = new WriteFont();
        // 是否加粗/黑体
        writeFont.setBold(false);
        // 字体颜色
        writeFont.setColor(Font.COLOR_NORMAL);
        // 字体名称
        writeFont.setFontName("宋体");
        // 字体大小
        writeFont.setFontHeightInPoints((short) 11);
        // 是否使用斜体
        writeFont.setItalic(false);
        // 是否在文本中使用横线删除
        writeFont.setStrikeout(false);
        // 设置要使用的文本下划线的类型
        writeFont.setUnderline(Font.U_NONE);
        // 设置要使用的字符集
        writeFont.setCharset(FontCharset.DEFAULT.getNativeId());
        headWriteCellStyle.setWriteFont(writeFont);

        // 内容样式策略策略
        WriteCellStyle contentWriteCellStyle = new WriteCellStyle();
        contentWriteCellStyle.setFillForegroundColor(IndexedColors.WHITE.getIndex());
        contentWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.GENERAL);
        contentWriteCellStyle.setBorderBottom(BorderStyle.NONE);
        contentWriteCellStyle.setBorderLeft(BorderStyle.NONE);
        contentWriteCellStyle.setBorderRight(BorderStyle.NONE);
        contentWriteCellStyle.setBorderTop(BorderStyle.NONE);
        contentWriteCellStyle.setFillPatternType(FillPatternType.NO_FILL);
        contentWriteCellStyle.setWrapped(false);

        EasyExcel.write("D:\\test.xlsx").head(heads)
                .registerWriteHandler(new HorizontalCellStyleStrategy(headWriteCellStyle, contentWriteCellStyle))
                .registerWriteHandler(new SimpleColumnWidthStyleStrategy(16)) // 列宽
                .registerConverter(new LocalDateTimeConverter())
                .sheet("销售订单").doWrite(contents);

		// 通过接口调用，使用流生成文件
        /*String fileName = "导出测试";
        response.setCharacterEncoding("utf-8");
        fileName = URLEncoder.encode(fileName, "UTF-8") + ".xlsx";
        response.setHeader("Content-disposition", "attachment;filename=" + fileName);
        response.setHeader("content-Type", "application/vnd.ms-excel");
        response.setHeader("filename", fileName);

        EasyExcel.write(response.getOutputStream()).head(heads)
                .registerWriteHandler(new HorizontalCellStyleStrategy(headWriteCellStyle, contentWriteCellStyle))
                .registerWriteHandler(new SimpleColumnWidthStyleStrategy(16)) // 列宽
                .registerConverter(new LocalDateTimeConverter())
                .sheet("销售订单").doWrite(contents);*/
    }