ComposeName/src/qh/lqg/utils/ExcelOperater.java

package qh.lqg.utils;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * ClassName: ExcelOperater <br/>
 * Function: Excel操作类. <br/>
 * date: 2016年8月7日 上午10:24:23 <br/>
 *
 * @author liuyuqi
 * @version
 * @since JDK 1.7
 */
public class ExcelOperater {
	private InputStreamReader isr = null;
	private BufferedReader br = null;

	public ExcelOperater(String file) throws FileNotFoundException {
		isr = new InputStreamReader(new FileInputStream(file));
	}

	/**
	 * readCSVFile:(解析csv文件 到一个list中 每个单元个为一个String类型记录，每一行为一个list。
	 * 再将所有的行放到一个总list中 ). <br/>
	 *
	 * @author liuyuqi
	 * @return
	 * @throws IOException
	 * @since JDK 1.7
	 */
	public List<List<String>> readCSVFile() throws IOException {
		br = new BufferedReader(isr);
		String rec = null;// 一行
		String str;// 一个单元格
		List<List<String>> listFile = new ArrayList<List<String>>();
		try {
			// 读取一行
			while ((rec = br.readLine()) != null) {
				Pattern pCells = Pattern
						.compile("(\"[^\"]*(\"{2})*[^\"]*\")*[^,]*,");
				Matcher mCells = pCells.matcher(rec);
				List<String> cells = new ArrayList<String>();// 每行记录一个list
				// 读取每个单元格
				while (mCells.find()) {
					str = mCells.group();
					str = str.replaceAll(
							"(?sm)\"?([^\"]*(\"{2})*[^\"]*)\"?.*,", "$1");
					str = str.replaceAll("(?sm)(\"(\"))", "$2");
					cells.add(str);
				}
				listFile.add(cells);
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (isr != null) {
				isr.close();
			}
			if (br != null) {
				br.close();
			}
		}
		return listFile;
	}
}