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java 解析excel

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2014年2月25日 14:24:48 解析excel方法

 

 

 

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package cn.wuwenfu.excel;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
 
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
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 ExcelHand {
 
    /** 总行数 */
 
    private int totalRows = 0;
 
    /** 总列数 */
 
    private int totalCells = 0;
 
    /** 错误信息 */
 
    private String errorInfo;
 
    /** 构造方法 */
 
    public ExcelHand()
    {
 
    }
 
    /**
     *
     * @描述:得到总行数
     * @参数:@return
     *
     * @返回值:int
     */
 
    public int getTotalRows()
    {
 
        return totalRows;
 
    }
 
    /**
     *
     * @描述:得到总列数
     * @参数:@return
     *
     * @返回值:int
     */
 
    public int getTotalCells()
    {
 
        return totalCells;
 
    }
 
    /**
     *
     * @描述:得到错误信息
     *
     * @参数:@return
     *
     * @返回值:String
     */
 
    public String getErrorInfo()
    {
 
        return errorInfo;
 
    }
 
    /**
     *
     * @描述:验证excel文件
     *
     * @参数:@param filePath 文件完整路径
     *
     * @参数:@return
     *
     * @返回值:boolean
     */
 
    public boolean validateExcel(String filePath)
    {
         
        /** 检查文件名是否为空或者是否是Excel格式的文件 */
 
        if (filePath == null || !(WDWUtil.isExcel2003(filePath) || WDWUtil.isExcel2007(filePath)))
        {
 
            errorInfo = "文件名不是excel格式";
 
            return false;
 
        }
         
        System.out.println(filePath);
        /** 检查文件是否存在 */
 
        File file = new File(filePath);
 
        if (file == null || !file.exists())
        {
 
            errorInfo = "文件不存在";
 
            return false;
 
        }
 
        return true;
 
    }
 
    /**
     *
     * @描述:根据文件名读取excel文件
     *
     * @参数:@param filePath 文件完整路径
     *
     * @参数:@return
     *
     * @返回值:List
     */
 
    public List<List<String>> read(String filePath)
    {
        //String filePath = ServletActionContext.getServletContext().getRealPath(path);
        List<List<String>> dataLst = new ArrayList<List<String>>();
 
        InputStream is = null;
 
        try
        {
 
            /** 验证文件是否合法 */
 
            if (!validateExcel(filePath))
            {
 
                System.out.println(errorInfo);
 
                return null;
 
            }
 
            /** 判断文件的类型,是2003还是2007 */
 
            boolean isExcel2003 = true;
 
            if (WDWUtil.isExcel2007(filePath))
            {
 
                isExcel2003 = false;
 
            }
 
            /** 调用本类提供的根据流读取的方法 */
 
            File file = new File(filePath);
 
            is = new FileInputStream(file);
 
            dataLst = read(is, isExcel2003);
 
            is.close();
 
        }
        catch (Exception ex)
        {
 
            ex.printStackTrace();
 
        }
        finally
        {
 
            if (is != null)
            {
 
                try
                {
 
                    is.close();
 
                }
                catch (IOException e)
                {
 
                    is = null;
 
                    e.printStackTrace();
 
                }
 
            }
 
        }
 
        /** 返回最后读取的结果 */
 
        return dataLst;
 
    }
 
    /**
     *
     * @描述:根据流读取Excel文件
     *
     * @参数:@param inputStream
     *
     * @参数:@param isExcel2003
     *
     * @参数:@return
     *
     * @返回值:List
     */
 
    public List<List<String>> read(InputStream inputStream, boolean isExcel2003)
    {
 
        List<List<String>> dataLst = null;
 
        try
        {
 
            /** 根据版本选择创建Workbook的方式 */
 
            Workbook wb = null;
 
            if (isExcel2003)
            {
                wb = new HSSFWorkbook(inputStream);
            }
            else
            {
                wb = new XSSFWorkbook(inputStream);
            }
            dataLst = read(wb);
 
        }
        catch (IOException e)
        {
 
            e.printStackTrace();
 
        }
 
        return dataLst;
 
    }
 
    /**
     *
     * @描述:读取数据
     *
     * @参数:@param Workbook
     *
     * @参数:@return
     *
     * @返回值:List<List<String>>
     */
 
    private  List<List<String>> read(Workbook wb)
    {
         
        List<List<String>> dataLst = new ArrayList<List<String>>();
 
        /** 得到第一个shell */
 
        Sheet sheet = wb.getSheetAt(0);
 
        /** 得到Excel的行数 */
 
        this.totalRows = sheet.getPhysicalNumberOfRows();
 
        /** 得到Excel的列数 */
 
        if (this.totalRows >= 1 && sheet.getRow(0) != null)
        {
 
            this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
 
        }
 
        /** 循环Excel的行 */
 
        for (int r = 0; r < this.totalRows; r++)
        {
 
            Row row = sheet.getRow(r);
 
            if (row == null)
            {
 
                continue;
 
            }
 
            List<String> rowLst = new ArrayList<String>();
             
            /** 循环Excel的列 */
 
            for (int c = 0; c < this.getTotalCells(); c++)
            {
 
                Cell cell = row.getCell(c);
                //String key=row.getCell(0).getStringCellValue();
                String cellValue = "";
                 
                if (null != cell)
                {
                     
                    //cellValue=cell.getStringCellValue();
                    // 以下是判断数据的类型
                    switch (cell.getCellType())
                    {
                    case HSSFCell.CELL_TYPE_NUMERIC: // 数字
                        //cellValue = cell.getNumericCellValue() + "";
                        if (HSSFDateUtil.isCellDateFormatted(cell)) {
                            // 如果是Date类型则,取得该Cell的Date值
                            Date date = cell.getDateCellValue();
                            // 把Date转换成本地格式的字符串
                            cellValue = DateUtil.format(date, "yyyy-MM-dd HH:mm:ss");
                            System.out.println(cellValue);
                            }
                            // 如果是纯数字
                            else {
                            // 取得当前Cell的数值
                            Integer num = new Integer((int) cell.getNumericCellValue());
                            cellValue = String.valueOf(num);
                            }
 
                        break;
 
                    case HSSFCell.CELL_TYPE_STRING: // 字符串
                        cellValue = cell.getStringCellValue();
                        break;
 
                    case HSSFCell.CELL_TYPE_BOOLEAN: // Boolean
                        cellValue = cell.getBooleanCellValue() + "";
                        break;
 
                    case HSSFCell.CELL_TYPE_FORMULA: // 公式
                        cellValue = cell.getCellFormula() + "";
                        break;
 
                    case HSSFCell.CELL_TYPE_BLANK: // 空值
                        cellValue = "";
                        break;
 
                    case HSSFCell.CELL_TYPE_ERROR: // 故障
                        cellValue = "非法字符";
                        break;
 
                    default:
                        cellValue = "未知类型";
                        break;
                    }
                }
                 
            //    System.out.print(cellValue+"  ");
                rowLst.add(cellValue);
 
            }
        //    System.out.println();
            /** 保存第r行的第c列 */
 
            dataLst.add(rowLst);
 
        }
 
        return dataLst;
 
    }
 
 
    /**
     * 将excel解析后的集合封装成Map形式,在这我没有直接在excel解析的时候就封装,看个人需求
     * @param list
     * @return
     */
    public static List<Map<String,String>> reflectMapList(List<List<String>> list){
        ExcelHand poi = new ExcelHand();
        List<Map<String, String>> mlist=new ArrayList<Map<String,String>>();
         
        Map<String, String> map = new HashMap<String, String>();
        if (list != null)
        {
 
            for (int i = 1; i < list.size(); i++)
            {
                map = new HashMap<String, String>();
            //    System.out.print("第" + (i) + "行");
 
                List<String> cellList = list.get(i);
 
                for (int j = 0; j < cellList.size(); j++)
                {
                    map.put(list.get(0).get(j), cellList.get(j));
                    // System.out.print("    第" + (j + 1) + "列值:");
            //    System.out.print(list.get(0).get(j)+"--" + cellList.get(j)+"  ");
 
                }
                //System.out.println();
                //System.out.println(map);
                mlist.add(map);
            }
 
        }
         
        return mlist;
    }
}
 
/**
 *
 * @描述:工具类
 */
 
class WDWUtil
{
 
     
    /**
     *
     * @描述:是否是2003的excel,返回true是2003
     *
     * @参数:@param filePath 文件完整路径
     *
     * @参数:@return
     *
     * @返回值:boolean
     */
 
    public static boolean isExcel2003(String filePath)
    {
 
        return filePath.matches("^.+\\.(?i)(xls)$");
 
    }
 
    /**
     *
     * @描述:是否是2007的excel,返回true是2007
     *
     * @参数:@param filePath 文件完整路径
     *
     * @参数:@return
     *
     * @返回值:boolean
     */
 
    public static boolean isExcel2007(String filePath)
    {
 
        return filePath.matches("^.+\\.(?i)(xlsx)$");
 
    }
}

 //测试类

我的excel文件放在c盘,单独取出了excel中的第三个单元格的字段,然后组合成字符串,写入了txt中。

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package cn.wuwenfu.excel;
 
import java.util.List;
 
public class TestMain {
     
    /**
     *
     * @描述:main测试方法
     *
     * @参数:@param args
     *
     * @参数:@throws Exception
     *
     * @返回值:void
     *
     */
    public static void main(String[] args) throws Exception
    {
 
        ExcelHand poi = new ExcelHand();
        //获取解析后的集合
        List<List<String>> lists = poi.read("c:/1.xls");
        System.out.println(lists.size());
        String str="";
        int j=0;
        for (List<String> t : lists) {
            if(j==0){
                //跳过表格的第一行
                j++;
                continue;
            }
            int i=0;
            String temp ="";
            for(String s: t){
                System.out.print(s+"    ");
                 
                //如果是第三个单元格就添加到字符串中
                 
                if(i==2){
                    str +=s+",";
                    temp=s;
                     
                     
                }
                //第四个单元格有数据,替换第三个单元格的
                if(i==3&&!s.isEmpty()){
                     
                     
                    //System.out.println("字符串:"+str);
                    str = str.substring(0, str.indexOf(temp));
                    str +=s+",";
                     
                    // str = str.replace(temp, s);
                    }
                 
                i++;
                 
            }
            System.out.println();
           }
         
        System.out.println(str);
         
        //写入日志
        Log.write(str, "c:/sds.txt");
        System.out.println("写入到c:/sds.txt");
         
         
        //首先获得需要的字符串
         
        /*
        //对集合进行重新组装 Map<字段,值>
        List<Map<String,String>> list=    ExcelHand.reflectMapList(lists);
        //调用工具类,组成对象集合
        List<TravelerInfo> ts=Tool.reflectObj(TravelerInfo.class, list);
        //遍历
        for (TravelerInfo t : ts) {
            System.out.println(t.getAirline_code()+" | "+ t.getFlight_num()+" | "+t.getSto()+" | "+t.getNationality()+"| ………………");
        }
*/
    }
 
}

java 解析excel

原文:http://www.cnblogs.com/jsRunner/p/3566645.html

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