一、需求分析

公司业务部门需要，根据一些数据，加上表头，导出需要的excel表格。效果如下：

 二、代码实现

【依赖准备】

        <!-- POI --><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.16</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.16</version></dependency>

对于excel样式，笔者的做法是，读取设置好的xlsx模板样式，设置导出表格的样式。

poi导出的各类样式设置

笔者的样式设置：

    public static void setPrintSetupInfoMargin(Sheet templeteSheet, Sheet outputSheet, String type) {PrintSetup psTemplete = templeteSheet.getPrintSetup();PrintSetup psOutput = outputSheet.getPrintSetup();//页眉边距设置psOutput.setHeaderMargin(psTemplete.getHeaderMargin());psOutput.setFooterMargin(psTemplete.getFooterMargin());//设置宽、高页数以适合纸张psOutput.setFitWidth(psTemplete.getFitWidth());psOutput.setFitHeight(psTemplete.getFitHeight());//设置纸张尺寸psOutput.setPaperSize(psTemplete.getPaperSize());//设置页码开始psOutput.setPageStart(psTemplete.getPageStart());//设置是否横向打印psOutput.setLandscape(psTemplete.getLandscape());//设置是按顺序从左到右还是自上而下psOutput.setLeftToRight(psTemplete.getLeftToRight());//设置是否处于草稿模式psOutput.setDraft(psTemplete.getDraft());//设置比例psOutput.setScale(psTemplete.getScale());//页边距设置psOutput.setHeaderMargin(psTemplete.getHeaderMargin());psOutput.setFooterMargin(psTemplete.getFooterMargin());if (".xls".equals(type)) {psOutput.setScale((short) (psTemplete.getScale()+5));outputSheet.setMargin(HSSFSheet.TopMargin, templeteSheet.getMargin(SXSSFSheet.TopMargin));outputSheet.setMargin(HSSFSheet.BottomMargin, templeteSheet.getMargin(SXSSFSheet.BottomMargin));outputSheet.setMargin(HSSFSheet.RightMargin, templeteSheet.getMargin(SXSSFSheet.RightMargin));outputSheet.setMargin(HSSFSheet.LeftMargin, templeteSheet.getMargin(SXSSFSheet.LeftMargin));}else {outputSheet.setMargin(SXSSFSheet.TopMargin, templeteSheet.getMargin(SXSSFSheet.TopMargin));outputSheet.setMargin(SXSSFSheet.BottomMargin, templeteSheet.getMargin(SXSSFSheet.BottomMargin));outputSheet.setMargin(SXSSFSheet.RightMargin, templeteSheet.getMargin(SXSSFSheet.RightMargin));outputSheet.setMargin(SXSSFSheet.LeftMargin, templeteSheet.getMargin(SXSSFSheet.LeftMargin));}//页面打印选项设置（根据模板的选择来设置）outputSheet.setFitToPage(templeteSheet.getFitToPage());//页脚设置Footer psTempletefooter = templeteSheet.getFooter();Footer psOutputfooter = outputSheet.getFooter();psOutputfooter.setCenter(psTempletefooter.getCenter());//页眉设置省略。。。//设置标题（实现打印时每一页都有同个头部标题）outputSheet.setRepeatingRows(templeteSheet.getRepeatingRows());outputSheet.setRepeatingColumns(templeteSheet.getRepeatingColumns());}

 根据模板设置长宽：

//设置行宽度、行高度
for (int i = 0; i < items.get(0).length + 3; i++) {sheet.setColumnWidth(i, tempSheet.getColumnWidth(i));
}

设置表头样式：

//设置合并区域
sheet.addMergedRegion(new CellRangeAddress(startLine + 2, startLine + 3, itemLists.length - 1, itemLists.length - 1));

效果图片：

手动控制分页的情况：

//设置分页符
sheet.setRowBreak(currNowCow - 1);

效果如下： 

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项目涉密，不能贴完整代码，谢谢理解哈！