POI進(jìn)行跨行需要用到對象HSSFSheet對象，現(xiàn)在就當(dāng)我們程序已經(jīng)定義了一個HSSFSheet對象sheet。?

跨第1行第1個到第2個單元格的操作為?
sheet.addMergedRegion(new Region(0,(short)0,0,(short)1));?

跨第1行第1個到第2行第1個單元格的操作為?
sheet.addMergedRegion(new Region(0,(short)0,1,(short)0));?


重點注意事項：?
1.單元格CELL和ROW對象下標(biāo)都是從0開始的。?
2.單元格合并時Region(1,2,3,4)第1個值的行號必須要比3位置的行號小，如果大于3就不能正常合并單元格?
3.合并單元格的時候要合并的單單元格必須先創(chuàng)建，這樣方便后面再次獲取這個單元格來填充數(shù)據(jù)，主要就是因為合并時不能由后向前進(jìn)行合并引起的。?

Java代碼??

import?java.io.IOException;??

??

import?org.apache.poi.hssf.usermodel.HSSFCell;??

import?org.apache.poi.hssf.usermodel.HSSFCellStyle;??

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.Region;??

??

??

public?class?ExcelTest?{??????

?????

????/**????

?????*?@param?args????

?????*/?????

????public?static?void?main(String[]?args)?throws?IOException?{??????

?????

????????try?{??????

????????????HSSFWorkbook?wb?=?new?HSSFWorkbook();??????

????????????HSSFSheet?sheet?=?wb.createSheet("new???sheet");??????

????????????HSSFCellStyle?style?=?wb.createCellStyle();?//?樣式對象??????

?????

????????????style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//?垂直??????

????????????style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//?水平??????

????????????HSSFRow?row?=?sheet.createRow((short)?0);??????

????????????HSSFRow?row2?=?sheet.createRow((short)?1);??????

?????

????????????sheet.addMergedRegion(new?Region(0,?(short)?0,?1,?(short)?0));??????

????????????HSSFCell?ce?=?row.createCell((short)?0);??????

????????????ce.setEncoding(HSSFCell.ENCODING_UTF_16);//?中文處理??????

????????????ce.setCellValue("項目\\日期");?//?表格的第一行第一列顯示的數(shù)據(jù)??????

????????????ce.setCellStyle(style);?//?樣式，居中??????

????????????int?num?=?0;??????

????????????for?(int?i?=?0;?i?<?9;?i++)?{?//?循環(huán)9次，每一次都要跨單元格顯示??????

????????????????//?計算從那個單元格跨到那一格??????

????????????????int?celln?=?0;??????

????????????????int?celle?=?0;??????

????????????????if?(i?==?0)?{??????

????????????????????celln?=?0;??????

????????????????????celle?=?1;??????

????????????????}?else?{??????

????????????????????celln?=?(i?*?2);??????

????????????????????celle?=?(i?*?2?+?1);??????

????????????????}??????

????????????????//?單元格合并??????

????????????????//?四個參數(shù)分別是：起始行，起始列，結(jié)束行，結(jié)束列??????

????????????????sheet.addMergedRegion(new?Region(0,?(short)?(celln?+?1),?0,??????

????????????????????????(short)?(celle?+?1)));??????

????????????????HSSFCell?cell?=?row.createCell((short)?(celln?+?1));??????

????????????????cell.setCellValue("merging"?+?i);?//?跨單元格顯示的數(shù)據(jù)??????

????????????????cell.setCellStyle(style);?//?樣式??????

????????????????//?不跨單元格顯示的數(shù)據(jù)，如：分兩行，上一行分別兩格為一格，下一行就為兩格，“數(shù)量”，“金額”??????

????????????????HSSFCell?cell1?=?row2.createCell((short)?celle);??????

????????????????HSSFCell?cell2?=?row2.createCell((short)?(celle?+?1));??????

????????????????cell1.setEncoding(HSSFCell.ENCODING_UTF_16);??????

????????????????cell1.setCellValue("數(shù)量");??????

????????????????cell1.setCellStyle(style);??????

????????????????cell2.setEncoding(HSSFCell.ENCODING_UTF_16);??????

????????????????cell2.setCellValue("金額");??????

????????????????cell2.setCellStyle(style);??????

????????????????num++;??????

????????????}??????

?????

????????????//?在后面加上合計百分比??????

?????

????????????//?合計?在最后加上，還要跨一個單元格??????

????????????sheet.addMergedRegion(new?Region(0,?(short)?(2?*?num?+?1),?0,??????

????????????????????(short)?(2?*?num?+?2)));??????

????????????HSSFCell?cell?=?row.createCell((short)?(2?*?num?+?1));??????

????????????cell.setEncoding(HSSFCell.ENCODING_UTF_16);??????

????????????cell.setCellValue("合計");??????

????????????cell.setCellStyle(style);??????

????????????HSSFCell?cell1?=?row2.createCell((short)?(2?*?num?+?1));??????

????????????HSSFCell?cell2?=?row2.createCell((short)?(2?*?num?+?2));??????

????????????cell1.setEncoding(HSSFCell.ENCODING_UTF_16);??????

????????????cell1.setCellValue("數(shù)量");??????

????????????cell1.setCellStyle(style);??????

????????????cell2.setEncoding(HSSFCell.ENCODING_UTF_16);??????

????????????cell2.setCellValue("金額");??????

????????????cell2.setCellStyle(style);??????

?????

????????????//?百分比?同上??????

????????????sheet.addMergedRegion(new?Region(0,?(short)?(2?*?num?+?3),?0,??????

????????????????????(short)?(2?*?num?+?4)));??????

????????????HSSFCell?cellb?=?row.createCell((short)?(2?*?num?+?3));??????

????????????cellb.setEncoding(HSSFCell.ENCODING_UTF_16);??????

?????????????

????????????cellb.setCellValue("百分比");??????

????????????cellb.setCellStyle(style);??????

??????????????

????????????HSSFCell?cellb1?=?row2.createCell((short)?(2?*?num?+?3));??????

????????????HSSFCell?cellb2?=?row2.createCell((short)?(2?*?num?+?4));??????

????????????cellb1.setEncoding(HSSFCell.ENCODING_UTF_16);??????

????????????cellb1.setCellValue("數(shù)量");??????

????????????cellb1.setCellStyle(style);??????

????????????cellb2.setEncoding(HSSFCell.ENCODING_UTF_16);??????

????????????cellb2.setCellValue("金額");??????

????????????cellb2.setCellStyle(style);??????

?????

????????????/***這里是問題的關(guān)鍵，將這個工作簿寫入到一個流中就可以輸出相應(yīng)的名字，這里需要寫路徑就ok了。?

????????????FileOutputStream?fileOut?=?new?FileOutputStream("workbook.xls");?????

????????????wb.write(fileOut);?????

????????????fileOut.close();?

?????????????**/??

??????????????

??????????????

????????????/**第二種是輸出到也面中的excel名稱?

?????????????*?pName="欄目統(tǒng)計表";????

????response.reset();????

????response.setContentType("application/x-msdownload");????

????response.setHeader("Content-Disposition","attachment;?filename="+new?String(pName.getBytes("gb2312"),"ISO-8859-1")+".xls");????

????ServletOutputStream?outStream=null;????

???

????try{????

????????outStream?=?response.getOutputStream();????

????????wb.write(outStream);????

????}catch(Exception?e)????

????{????

?????e.printStackTrace();????

????}finally{????

????????outStream.close();????

????}????

?????????????*?*/??

????????????System.out.print("OK");??????

????????}?catch?(Exception?ex)?{??????

????????????ex.printStackTrace();??????

????????}??????

?????

????}??????

?????

} ? ?

轉(zhuǎn)載于:https://www.cnblogs.com/langtianya/p/6345012.html

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