数据结构---公交线路提示系统05

                                                           
                        
                        
                        


 
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.poi.hssf.usermodel.HSSFCell;
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.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ExcelUtil {
    private static String substring;
    public static void main(String[] args) throws IOException{
        try {
            //输入文件名
            System.out.println("开始读入表格");
            ExcelUtil.read("D://dns.xls");
            } catch (IOException e) {
                e.printStackTrace();
                System.out.println("读入失败");
                }
        }
    public static void read(String filePath) throws IOException {
         
        //判断是xls还是xlsx
        String fileType = filePath.substring(filePath.lastIndexOf(".") + 1,filePath.length());
        InputStream input = new FileInputStream(filePath);
        Workbook wb = null;
        if (fileType.equals("xls")) {
            System.out.println("您的excel格式为.xls");
            wb = new HSSFWorkbook(input);
            System.out.println("成功读取表格");
        } else if (fileType.equals("xlsx")) {
            wb= new XSSFWorkbook(input);    
        } else {
            System.out.println("您输入的excel格式不正确");
        }
        //得到一个工作表对象;
        System.out.println("得到一个工作表对象");
        Sheet sheet = wb.getSheetAt(0);
        int rsRows = sheet.getLastRowNum();// 获取sheet表中的总行数
        // 遍历行
        System.out.println("遍历行");
        for (int i=0;i<=rsRows;i++) {
            Row row = sheet.getRow(i);
            StringBuffer sb = new StringBuffer();
            System.out.println("遍历单元格");
            //遍历单元格
            for(int j=0;j<row.getLastCellNum();j++){
                String value = null;
                Cell cell = row.getCell(j);
                //判断单元格是否为空
                System.out.println("判断单元格是否为空");
                if(cell==null||cell.equals(null)||cell.getCellType()==HSSFCell.CELL_TYPE_BLANK){//空值
                    value="null";
                }else {
                    //判断数据类型
                    switch (cell.getCellType()) {
                        case HSSFCell.CELL_TYPE_FORMULA:value = "" + cell.getCellFormula();//公式型
                        break;
                        case HSSFCell.CELL_TYPE_NUMERIC:value = "" + cell.getNumericCellValue();//数值型
                        break;
                        case HSSFCell.CELL_TYPE_STRING:value = cell.getStringCellValue();//字符串型
                        break;
                        }
                }                
                sb.append(value + " ");
                substring = sb.substring(0, sb.length()-1);
            }
        
        //转换为数组
        String[] strings = sb.toString().split(",");
        System.out.println(substring.toString());
        System.out.println("操作完成！");
        for(int a=0;a<strings.length;a++) {
            System.out.println(strings[a]);
        }
        }
    }
    
}