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jxl切割excel文件

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();
			}
		}

	}
}




jxl切割excel文件