POI EXCEL多表头的处理代码收藏

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();
}


}
}

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(); } } }