Java实现多级表头和复杂表头的导出功能
作者:IT行业小趴菜
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前言
大概内容:
多级表头,复杂表头的导出功能都可以仿照这个例子去编写
提示:以下是本篇文章正文内容,下面案例可供参考
一、实现的效果
二、调用工具类
业务层调用
//假设这是需要导出的数据 List<MonitorFoldLineTable> data = new ArrayList(); //调用导出工具类 FileExportUtil.testExcelDemo(data,response);
对应的实体类
public class MonitorFoldLineTable { private String cdbh; private String sd; private Double dcsg; private Double dcdsf; private Double dcc; private Double ljsg; private Double ljdsf; private Double ljc;; private Double bxsg; private Double bxdsf; private Double bxc; private String time; }
三、详细工具类
直接copy改吧改吧就可以使用,有详细注释
import com.iS3.manager.monitoring.domain.vo.MonitorFoldLineTable; import org.apache.poi.ss.usermodel.*; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.util.IOUtils; import org.apache.poi.xssf.usermodel.*; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.net.URLEncoder; import java.util.List; /** * Created with IntelliJ IDEA. * * @Author: yangyongzhuo * @Date: 2021/07/21/8:58 * @Description: */ public class FileExportUtil { /** * @param list 需要写入excel的数据 从数据库或者其他途径读取 * @Description: 导出监测对比数据的工具类 * @return: * @Author: yangyongzhuo * @Date: 2021/7/25 9:29 */ public static void testExcelDemo(List<MonitorFoldLineTable> list, HttpServletResponse response) { /** 第一步,创建一个Workbook,对应一个Excel文件 */ XSSFWorkbook wb = new XSSFWorkbook(); /** 第二步,在Workbook中添加一个sheet,对应Excel文件中的sheet */ XSSFSheet sheet = wb.createSheet("excel导出标题"); /** 第三步,设置样式以及字体样式*/ XSSFCellStyle titleStyle = createTitleCellStyle(wb); XSSFCellStyle headerStyle = createHeadCellStyle(wb); XSSFCellStyle contentStyle = createContentCellStyle(wb); /** 第四步,创建标题 ,合并标题单元格 */ // 行号 int rowNum = 0; // 创建第一页的第一行,索引从0开始 XSSFRow row0 = sheet.createRow(rowNum++); row0.setHeight((short) 600);// 设置行高 String[] row_Text = {"测点编号", "单次变化量", "", "", "累计变化量", "", "", "变形速率", "", "", "监测时间"}; for (int i = 0; i < row_Text.length; i++) { XSSFCell c00 = row0.createCell(i); c00.setCellValue(row_Text[i]); c00.setCellStyle(headerStyle); } // 合并单元格,参数依次为起始列,结束列,起始行,结束行 (索引0开始) sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, 0));//标题合并单元格操作,4为总列数 sheet.addMergedRegion(new CellRangeAddress(0, 0, 1, 3));//标题合并单元格操作,4为总列数 sheet.addMergedRegion(new CellRangeAddress(0, 0, 4, 6));//标题合并单元格操作,4为总列数 sheet.addMergedRegion(new CellRangeAddress(0, 0, 7, 9));//标题合并单元格操作,4为总列数 sheet.addMergedRegion(new CellRangeAddress(0, 1, 10, 10));//标题合并单元格操作,4为总列数 //第二行 XSSFRow row2 = sheet.createRow(rowNum++); row2.setHeight((short) 700); String[] row_third = {"", "施工监测", "第三方监测", "前后差值", "施工监测", "第三方监测", "前后差值", "施工监测", "第三方监测", "前后差值"}; for (int i = 0; i < row_third.length; i++) { XSSFCell tempCell = row2.createCell(i); tempCell.setCellValue(row_third[i]); tempCell.setCellStyle(headerStyle); } for (MonitorFoldLineTable value : list) { XSSFRow tempRow = sheet.createRow(rowNum++); tempRow.setHeight((short) 500); // 循环单元格填入数据 for (int j = 0; j < 12; j++) { //列宽自适应,j为自适应的列,true就是自适应,false就是不自适应,默认不自适应 sheet.autoSizeColumn(j, true); XSSFCell tempCell = tempRow.createCell(j); tempCell.setCellStyle(contentStyle); String tempValue = ""; switch (j) { case 0: tempValue = value.getCdbh(); break; case 1: tempValue = value.getSd(); break; case 2: tempValue = value.getDcsg().toString(); break; case 3: tempValue = value.getDcdsf().toString(); break; case 4: tempValue = value.getDcc().toString(); break; case 5: tempValue = value.getLjsg().toString(); break; case 6: tempValue = value.getLjdsf().toString(); break; case 7: tempValue = value.getLjc().toString(); break; case 8: tempValue = value.getBxsg().toString(); break; case 9: tempValue = value.getBxdsf().toString(); break; case 10: tempValue = value.getBxc().toString(); break; case 11: tempValue = value.getTime(); break; } tempCell.setCellValue(tempValue); } } //导出到浏览器下载 buildExcelDocument("监测数据", wb, response); } /** * @Description: [导出到浏览器] * @Param: [fileName, wb, response] * @return: void * @Author: yangyongzhuo * @Date: 2021/7/25 9:40 */ private static void buildExcelDocument(String fileName, Workbook wb, HttpServletResponse response) { try { response.setContentType("application/octet-stream"); // 可自行定义编码格式 response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "utf-8")); //清除jsp编译html文件的空白,防止excel出现空行 response.flushBuffer(); //写出 wb.write(response.getOutputStream()); } catch (IOException e) { e.printStackTrace(); } finally { IOUtils.closeQuietly(wb); } } //---------------------------------------以下是封装的样式----------------------------- /** * 创建标题样式 * * @param wb * @return */ private static XSSFCellStyle createTitleCellStyle(XSSFWorkbook wb) { XSSFCellStyle cellStyle = wb.createCellStyle(); cellStyle.setAlignment(HorizontalAlignment.CENTER);//水平居中 cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直对齐 cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND); // cellStyle.setFillForegroundColor(IndexedColors.GREY_40_PERCENT.getIndex());//背景颜色 XSSFFont headerFont1 = (XSSFFont) wb.createFont(); // 创建字体样式 headerFont1.setBold(true); //字体加粗 headerFont1.setFontName("黑体"); // 设置字体类型 headerFont1.setFontHeightInPoints((short) 15); // 设置字体大小 cellStyle.setFont(headerFont1); // 为标题样式设置字体样式 return cellStyle; } /** * 创建表头样式 * * @param wb * @return */ private static XSSFCellStyle createHeadCellStyle(XSSFWorkbook wb) { XSSFCellStyle cellStyle = wb.createCellStyle(); cellStyle.setWrapText(true);// 设置自动换行 cellStyle.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());//背景颜色 cellStyle.setAlignment(HorizontalAlignment.CENTER); //水平居中 cellStyle.setVerticalAlignment(VerticalAlignment.CENTER); //垂直对齐 cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND); // cellStyle.setBottomBorderColor(IndexedColors.BLACK.index); cellStyle.setBorderBottom(BorderStyle.THIN); //下边框 cellStyle.setBorderLeft(BorderStyle.THIN); //左边框 cellStyle.setBorderRight(BorderStyle.THIN); //右边框 cellStyle.setBorderTop(BorderStyle.THIN); //上边框 XSSFFont headerFont = (XSSFFont) wb.createFont(); // 创建字体样式 headerFont.setBold(true); //字体加粗 headerFont.setFontName("黑体"); // 设置字体类型 headerFont.setFontHeightInPoints((short) 12); // 设置字体大小 cellStyle.setFont(headerFont); // 为标题样式设置字体样式 return cellStyle; } /** * 创建内容样式 * * @param wb * @return */ private static XSSFCellStyle createContentCellStyle(XSSFWorkbook wb) { XSSFCellStyle cellStyle = wb.createCellStyle(); cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);// 垂直居中 cellStyle.setAlignment(HorizontalAlignment.CENTER);// 水平居中 cellStyle.setWrapText(true);// 设置自动换行 cellStyle.setBorderBottom(BorderStyle.THIN); //下边框 cellStyle.setBorderLeft(BorderStyle.THIN); //左边框 cellStyle.setBorderRight(BorderStyle.THIN); //右边框 cellStyle.setBorderTop(BorderStyle.THIN); //上边框 // 生成12号字体 XSSFFont font = wb.createFont(); font.setColor((short) 8); font.setFontHeightInPoints((short) 12); cellStyle.setFont(font); return cellStyle; } }
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