近期在实施一个项目。当中一项工作是处理历史数据。
客户提供过来的数据是excel表格,超过20万条记录,因为目标系统导入限制,每次仅仅能导入大小不超过8M的文件。所以须要对这些数据进行切割处理。在手工处理一遍后,认为能够通过写一个程序来自己主动实现切割。于是用JAVA写了一个程序,用于针对特定文件实现给定记录数的切割功能。
详见代码:
package cn.sean.main; import java.io.File; import java.io.IOException; import jxl.Cell; import jxl.Sheet; import jxl.Workbook; import jxl.read.biff.BiffException; import jxl.write.Label; import jxl.write.WritableSheet; import jxl.write.WriteException; import jxl.write.biff.RowsExceededException; public class AccessExcel { Cell[] titleCell; Cell[][] allCell; jxl.Workbook workBook; Sheet sheet; /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub String url = "c:\\a.xls"; AccessExcel ae = new AccessExcel(); ae.readExcel(url); ae.splitExcel(500, "c:\\"); } /* * 读取原excel文件,并将相关的数据存储到数组中 */ public void readExcel(String source) { File file = new File(source); try { workBook = Workbook.getWorkbook(file); sheet = workBook.getSheet(0); titleCell = new Cell[sheet.getColumns()];// 用于存储列标题 allCell = new Cell[sheet.getColumns()][sheet.getRows()];// 用于存储全部单元格数据 // 将列标题存储存到一个一维数组中 for (int i = 0; i < titleCell.length; i++) { titleCell[i] = sheet.getCell(i, 0); } // 将全部单元格数据存储到一个二维数组中 for (int i = 0; i < sheet.getColumns(); i++) { for (int j = 0; j < sheet.getRows(); j++) { allCell[i][j] = sheet.getCell(i, j); } } } catch (BiffException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /* *@param number代表须要分隔的行数 *@param destination代表分隔文件后存储的路径 */ public void splitExcel(int number, String destination) { int index = (int) Math.ceil(sheet.getRows() / number);//计算须要分隔多少个文件 File[] files = new File[index + 1]; //初始化文件数组 for (int i = 0; i <= index; i++) { files[i] = new File(destination + i + ".xls"); } int n = number; int y = 1;//用于记录行的位置 for (int i = 0; i <= index; i++) { try { jxl.write.WritableWorkbook ww = Workbook .createWorkbook(files[i]); WritableSheet ws = ww.createSheet("sheet1", 0); for (int t = 0; t < sheet.getColumns(); t++) { ws.addCell(new Label(t, 0, allCell[t][0].getContents())); } out: for (int m = 1; y < sheet.getRows(); y++, m++) { for (int x = 0; x < sheet.getColumns(); x++) { if (y >number) { number += n; break out; } ws.addCell(new Label(x, m, allCell[x][y].getContents())); } } ww.write(); ww.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (RowsExceededException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (WriteException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }
时间: 2024-10-13 12:07:36