Java解析excel

<dependencies>
      <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.14</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.14</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>3.14</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>3.14</version>
        </dependency>
  </dependencies>

package excel;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

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 TT {
    public static void main(String[] args) {
        try {
            File file=new File("src/main/java/excel/1.xls");
            String name=file.getName();
            boolean is2007=true;
            if(name.matches("^.+\.(?i)(xls)$")){
                is2007=false;
            }else if (name.matches("^.+\.(?i)(xlsx)$")) {
                is2007=true;
            }else{
                throw new Exception("未知的版本");
            }
            InputStream is=new FileInputStream(file);
            Workbook wb=null;
            if(is2007){
                wb=new XSSFWorkbook(is);
            }else{
                wb=new HSSFWorkbook(is);
            }
            Sheet sheet=wb.getSheetAt(0);
            //得到行数
            int totalRows=sheet.getPhysicalNumberOfRows();
            List<String> list=new ArrayList<String>();
            //得到列数
            int totalCells=sheet.getRow(0).getPhysicalNumberOfCells();
            for(int i=0;i<totalRows;i++){
                Row row=sheet.getRow(i);
                for(int j=0;j<totalCells;j++){
                    Cell cell=row.getCell(j);
                    if(i==0){
                        list.add(cell.getStringCellValue());
                    }else{
                        break;
                    }
                }
                break;
            }
            
            
            for(int i=0;i<totalRows;i++){
                Row row=sheet.getRow(i);
                System.out.println("============"+(i+1));
                for(int j=0;j<totalCells;j++){
                    Cell cell=row.getCell(j);
                    String v="";
                    if(cell==null){
                        v="";
                    }else{
                       int t=cell.getCellType();
                        if(XSSFCell.CELL_TYPE_NUMERIC==t){
                            double d=cell.getNumericCellValue();
                            String value=Double.toString(d);
                            int len=value.length();
                            int index=value.indexOf(".");
                            int pointW=4;//保留小数位数
                            pointW++;
                            if(index>0&&(index+pointW)<len){
                                v=value.substring(0,index+pointW);
                            }else{
                                v=value;
                            }
                        }else{
                            cell.setCellType(Cell.CELL_TYPE_STRING);
                            v=cell.getStringCellValue();
                        }
                    }
                    System.out.print(list.get(j)+":"+v+"|");
                }
                System.out.println();
            }
            
            
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        
    }
}