Java文件解析

今天写博客比较上头，一股脑的想把自己用过的工具类都给分享出来，下面是一个常用的文件解析的工具类，支持文件类型是xls和xlsx。一起来看代码吧：

package cn.com.hxfz.util;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.log4j.Logger;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class AnalysisFile {

    private static final Logger LOGGER = Logger.getLogger(ImportFile.class);
    private final static String excel2003L = ".xls"; // 2003- 版本的excel
    private final static String excel2007U = ".xlsx"; // 2007+ 版本的excel

    public static List<Map<String, Object>> parseExcel(InputStream in,
                                                       String fileName, Map<String, String> mapping, String[] titleName)
            throws Exception {
        LOGGER.info("---------正在解析文件----------------");
        // 根据文件名来创建Excel工作薄
        Workbook work = getWorkbook(in, fileName);
        if (null == work) {
            throw new Exception("创建Excel工作薄为空！");
        }
        Sheet sheet = null;
        Row row = null;
        Cell cell = null;
        // 返回数据
        List<Map<String, Object>> ls = new ArrayList<Map<String, Object>>();

        // 遍历Excel中所有的sheet
        for (int i = 0; i < work.getNumberOfSheets(); i++) {
            sheet = work.getSheetAt(0);
            if (sheet == null)
                continue;

            // 取第一行标题
            row = sheet.getRow(0);
            String title[] = null;
            if (row != null) {
                title = new String[row.getLastCellNum()];
                for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {
                    cell = row.getCell(y);
                    title[y] = replaceBlank((String) getCellValue(cell));
                }

            } else
                continue;

            // 比较内容是否正确
            String titleString = arrayToString(title);
            String nameString = arrayToString(titleName);
            if (!titleString.equals(nameString)) {
                return ls;
            }
            // 遍历当前sheet中的所有行
            for (int j = 1; j < sheet.getLastRowNum() + 1; j++) {
                boolean result = isRowEmpty(row, j);
                if (true == result) {
                    continue;
                }
                row = sheet.getRow(j);
                Map<String, Object> m = new HashMap<String, Object>();
                // 遍历所有的列
                for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {
                    cell = row.getCell(y);
                    String key = title[y];
                    // log.info(JSON.toJSONString(key));
                    m.put(mapping.get(key), getCellValue(cell));
                }
                ls.add(m);
            }
            break;

        }
        return ls;
    }

    /**
     * 描述：根据文件后缀，自适应上传文件的版本
     *
     * @param inStr ,fileName
     * @return
     * @throws Exception
     */
    public static Workbook getWorkbook(InputStream inStr, String fileName)
            throws Exception {
        Workbook wb = null;
        String fileType = fileName.substring(fileName.lastIndexOf("."));
        if (excel2003L.equals(fileType)) {
            wb = new HSSFWorkbook(inStr); // 2003-
        } else if (excel2007U.equals(fileType)) {
            wb = new XSSFWorkbook(inStr); // 2007+
        } else {
            throw new Exception("解析的文件格式有误！");
        }
        return wb;
    }

    /**
     * 描述：对表格中数值进行格式化
     *
     * @param cell
     * @return
     */
    public static Object getCellValue(Cell cell) {
        Object value = null;
        DecimalFormat df = new DecimalFormat("0"); // 格式化number String字符
        SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd"); // 日期格式化
        DecimalFormat df2 = new DecimalFormat("0"); // 格式化数字

        switch (cell.getCellType()) {
            case Cell.CELL_TYPE_STRING:
                value = cell.getRichStringCellValue().getString();
                break;
            case Cell.CELL_TYPE_NUMERIC:
                if ("General".equals(cell.getCellStyle().getDataFormatString())) {
                    value = df.format(cell.getNumericCellValue());
                } else if ("m/d/yy".equals(cell.getCellStyle()
                        .getDataFormatString())) {
                    value = sdf.format(cell.getDateCellValue());
                } else {
                    value = df2.format(cell.getNumericCellValue());
                }
                break;
            case Cell.CELL_TYPE_BOOLEAN:
                value = cell.getBooleanCellValue();
                break;
            case Cell.CELL_TYPE_BLANK:
                value = "";
                break;
            default:
                break;
        }
        return value;
    }

    /**
     * 去除数据的空格、回车、换行符、制表符
     *
     * @param @param  str
     * @param @return
     * @return String
     * @throws
     * @Title: replaceBlank
     * @Description:
     * @author wp
     */
    public static String replaceBlank(String str) {
        String dest = "";
        if (str != null) {
            // 空格\t、回车\n、换行符\r、制表符\t
            Pattern p = Pattern.compile("\\s*|\t|\r|\n");
            Matcher m = p.matcher(str);
            dest = m.replaceAll("");
        }
        return dest;
    }

    /**
     * 判断行是否为空
     *
     * @param @param  row
     * @param @return
     * @return boolean
     * @throws
     * @Title: isRowEmpty
     * @Description:
     * @author wp
     */
    public static boolean isRowEmpty(Row row, int j) {
        for (j = row.getFirstCellNum(); j < row.getLastCellNum(); j++) {
            Cell cell = row.getCell(j);
            String str = cell.toString();
            if (cell != null && cell.getCellType() != Cell.CELL_TYPE_BLANK
                    && str.trim().length() != 0) {
                return false;
            }
        }
        return true;
    }

    /**
     * 数组转字符串
     *
     * @param @param  arr
     * @param @return
     * @return String
     * @throws
     * @Title: arrayToString
     * @Description:
     * @author wp
     */
    public static String arrayToString(String[] arr) {
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < arr.length; i++) {
            sb.append(arr[i]);
        }
        String sb1 = sb.toString();
        return sb1;
    }
}

copy直接用，是不是很舒服呢，哈哈哈，欢迎大家指教