java 操作 xls

package com.parse.wallmonkey.excelparse;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
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.poifs.filesystem.POIFSFileSystem;

public class ExcelOperate {

	public static void main(String[] args) throws Exception {
		test2();
	}

	public static void test2() throws Exception {
		File file = new File(
				"C:\\Users\\ThinkPad\\Desktop\\需求\\高清图片和维基百科图片匹配结果输出out123\\out2 - 副本.xls");

		String[][] result = getData(file, 0);

		int rowLength = result.length;
		System.out.println(rowLength);
		for (int i = 0; i < rowLength; i++) {
			System.out.println(i + result[i][16]);
		}
	}

	/**
	 * 
	 * 读取Excel的内容，第一维数组存储的是一行中格列的值，二维数组存储的是多少个行
	 * 
	 * @param file
	 *            读取数据的源Excel
	 * 
	 * @param ignoreRows
	 *            读取数据忽略的行数，比喻行头不需要读入 忽略的行数为1
	 * 
	 * @return 读出的Excel中数据的内容
	 * 
	 * @throws FileNotFoundException
	 * 
	 * @throws IOException
	 */

	public static String[][] getData(File file, int ignoreRows)

	throws FileNotFoundException, IOException {

		List<String[]> result = new ArrayList<String[]>();

		int rowSize = 0;

		BufferedInputStream in = new BufferedInputStream(new FileInputStream(

		file));

		// 打开HSSFWorkbook

		POIFSFileSystem fs = new POIFSFileSystem(in);

		HSSFWorkbook wb = new HSSFWorkbook(fs);

		HSSFCell cell = null;

		for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {

			HSSFSheet st = wb.getSheetAt(sheetIndex);

			// 第一行为标题，不取

			for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {

				HSSFRow row = st.getRow(rowIndex);

				if (row == null) {

					continue;

				}

				int tempRowSize = row.getLastCellNum() + 1;

				if (tempRowSize > rowSize) {

					rowSize = tempRowSize;

				}

				String[] values = new String[rowSize];

				Arrays.fill(values, "");

				boolean hasValue = false;

				for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) {

					String value = "";

					cell = row.getCell(columnIndex);

					if (cell != null) {

						switch (cell.getCellType()) {

						case HSSFCell.CELL_TYPE_STRING:

							value = cell.getStringCellValue();

							break;

						case HSSFCell.CELL_TYPE_NUMERIC:

							if (HSSFDateUtil.isCellDateFormatted(cell)) {

								Date date = cell.getDateCellValue();

								if (date != null) {

									value = new SimpleDateFormat("yyyy-MM-dd")

									.format(date);

								} else {

									value = "";

								}

							} else {

								value = new DecimalFormat("0").format(cell

								.getNumericCellValue());

							}

							break;

						case HSSFCell.CELL_TYPE_FORMULA:

							// 导入时如果为公式生成的数据则无值

							if (!cell.getStringCellValue().equals("")) {

								value = cell.getStringCellValue();

							} else {

								value = cell.getNumericCellValue() + "";

							}

							break;

						case HSSFCell.CELL_TYPE_BLANK:

							break;

						case HSSFCell.CELL_TYPE_ERROR:

							value = "";

							break;

						case HSSFCell.CELL_TYPE_BOOLEAN:

							value = (cell.getBooleanCellValue() == true ? "Y"

							: "N");

							break;

						default:

							value = "";

						}

					}

					if (columnIndex == 0 && value.trim().equals("")) {

						break;

					}

					values[columnIndex] = rightTrim(value);

					hasValue = true;

				}

				if (hasValue) {

					result.add(values);

				}

			}

		}

		in.close();

		String[][] returnArray = new String[result.size()][rowSize];

		for (int i = 0; i < returnArray.length; i++) {

			returnArray[i] = (String[]) result.get(i);

		}

		return returnArray;

	}

	/**
	 * 
	 * 去掉字符串右边的空格
	 * 
	 * @param str
	 *            要处理的字符串
	 * 
	 * @return 处理后的字符串
	 */

	public static String rightTrim(String str) {

		if (str == null) {

			return "";

		}

		int length = str.length();

		for (int i = length - 1; i >= 0; i--) {

			if (str.charAt(i) != 0x20) {

				break;

			}

			length--;

		}

		return str.substring(0, length);

	}

}