POI EXCEL多表头的处理代码

最新推荐文章于 2024-01-16 15:29:44 发布

转载最新推荐文章于 2024-01-16 15:29:44 发布 · 1.9k 阅读

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#excel #string #header #hashmap #file #exception

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本文介绍了一个使用Java和Apache POI库来创建复杂Excel报告的方法。该报告包含多种样式及合并单元格的功能，并能够处理大量的数据列，使得创建专业的Excel文件变得简单。文章详细展示了如何设置字体、边框、背景颜色等样式，以及如何根据数据动态调整表格结构。

import java.io.File; import java.io.FileOutputStream; import java.util.HashMap; import java.util.Map; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFCellStyle; import org.apache.poi.hssf.usermodel.HSSFFont; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.hssf.util.HSSFColor; import org.apache.poi.hssf.util.Region; public class test{ public static void main(String[] args) { // TODO Auto-generated method stub FileOutputStream fileOut = null; File file = new File("c:/1.xls"); String[] header = { "服务器名", "IP地址", "库cache命中率_最大值", "库cache命中率_平均值", "连接数_最大值", "连接数_平均值", "游标数_最大值", "游标数_平均值", "session数_最大值", "session数_平均值", "事务数_最大值", "事务数_平均值", "数据库锁数_最大值", "数据库锁数_平均值", "缓冲池命中数_最大值", "缓冲池命中数_平均值", "表空间_使用率_最大值", "表空间_使用率_平均值", "表空间_已用空间_最大值", "表空间_已用空间_平均值", "表空间_剩余率_最大值", "表空间_剩余率_平均值", "表空间_剩余空间_最大值", "表空间_剩余空间_平均值", "表空间_总容量_最大值", "表空间_总容量_平均值", "连接状态" }; try { HSSFWorkbook wb = new HSSFWorkbook(); HSSFSheet sheet = wb.createSheet("new sheet"); HSSFFont fontinfo = wb.createFont(); fontinfo.setFontHeightInPoints((short) 8); // 字体大小 HSSFFont fonthead = wb.createFont(); fonthead.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 加粗 HSSFCellStyle cellStylename = wb.createCellStyle();// 表名样式 cellStylename.setFont(fonthead); HSSFCellStyle cellStyleinfo = wb.createCellStyle();// 表信息样式 cellStyleinfo.setAlignment(HSSFCellStyle.ALIGN_RIGHT);// 对齐 cellStyleinfo.setFont(fontinfo); HSSFCellStyle cellStylehead = wb.createCellStyle();// 表头样式 cellStylehead.setFont(fonthead); cellStylehead.setAlignment(HSSFCellStyle.ALIGN_CENTER); cellStylehead.setBorderBottom(HSSFCellStyle.BORDER_THIN);// 边框 cellStylehead.setBottomBorderColor(HSSFColor.BLACK.index); cellStylehead.setBorderLeft(HSSFCellStyle.BORDER_THIN); cellStylehead.setLeftBorderColor(HSSFColor.BLACK.index); cellStylehead.setBorderRight(HSSFCellStyle.BORDER_THIN); cellStylehead.setRightBorderColor(HSSFColor.BLACK.index); cellStylehead.setBorderTop(HSSFCellStyle.BORDER_THIN); cellStylehead.setTopBorderColor(HSSFColor.BLACK.index); cellStylehead.setFillForegroundColor(HSSFColor.ORANGE.index); cellStylehead.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); HSSFCellStyle cellStyle = wb.createCellStyle();// 数据单元样式 cellStyle.setWrapText(true);// 自动换行 cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); cellStyle.setBottomBorderColor(HSSFColor.BLACK.index); cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN); cellStyle.setLeftBorderColor(HSSFColor.BLACK.index); cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN); cellStyle.setRightBorderColor(HSSFColor.BLACK.index); cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN); cellStyle.setTopBorderColor(HSSFColor.BLACK.index); int col = header.length; HSSFRow row = sheet.createRow((short) 0); HSSFCell cell = row.createCell((short) 0); cell.setEncoding(HSSFCell.ENCODING_UTF_16); cell.setCellStyle(cellStylename); cell.setCellValue("oracle");// 表名 sheet.addMergedRegion(new Region(0, (short) 0, 0, (short) 1)); cell = row.createCell((short) 2); cell.setEncoding(HSSFCell.ENCODING_UTF_16); cell.setCellStyle(cellStyleinfo); cell.setCellValue("oracle"); // 信息 sheet.addMergedRegion(new Region(0, (short) 2, 0, (short) col)); int rows_max = 0; for (int i = 0; i < header.length; i++) { String h = header[i]; if (h.split("_").length > rows_max) { rows_max = h.split("_").length; } } Map map = new HashMap(); for (int k = 0; k < rows_max; k++) { row = sheet.createRow((short) k + 1); if (k == 0) { cell = row.createCell((short) (0)); cell.setEncoding(HSSFCell.ENCODING_UTF_16); cell.setCellStyle(cellStylehead); cell.setCellValue("序号"); sheet.addMergedRegion(new Region(k + 1, (short) 0, k + rows_max, (short) 0)); } for (int i = 0; i < header.length; i++) { String headerTemp = header[i]; String[] s = headerTemp.split("_"); String sk = ""; int num = i + 1; if (s.length == 1) { cell = row.createCell((short) (num)); cell.setEncoding(HSSFCell.ENCODING_UTF_16); cell.setCellStyle(cellStylehead); sheet.addMergedRegion(new Region(1, (short) (num), rows_max, (short) (num))); sk = headerTemp; cell.setCellValue(sk); } else { System.out.println(sk); cell = row.createCell((short) (num)); cell.setEncoding(HSSFCell.ENCODING_UTF_16); cell.setCellStyle(cellStylehead); int cols = 0; if (map.containsKey(headerTemp)) { continue; } for (int d = 0; d <= k; d++) { if (d != k) { sk += s[d] + "_"; } else{ sk += s[d]; } } if(map.containsKey(sk)){ continue; } for (int j = 0; j < header.length; j++) { if (header[j].indexOf(sk) != -1) { cols++; } } cell.setCellValue(s[k]); sheet .addMergedRegion(new Region(k + 1, (short) num, k + 1, (short) (num + cols-1))); if (sk.equals(headerTemp)) { sheet.addMergedRegion(new Region(k + 1, (short) num, k + 1 + rows_max - s.length, (short) num)); } } if (s.length > k) { if (!map.containsKey(sk)) { String key = ""; if (k > 0) { key = sk; } else { key = s[k]; } map.put(key, null); } } } } fileOut = new FileOutputStream(file); // modify by xywang(2007-11-19) end wb.write(fileOut); } catch (Exception e) { e.printStackTrace(); } } }