java读取CSV文件

public class CsvUtil1 {
private String filename = null;

private BufferedReader bufferedreader = null;

private List list = new ArrayList();

public CsvUtil1() {

}

public CsvUtil1(String filename) throws IOException {
  this.filename = filename;
  bufferedreader = new BufferedReader(new FileReader(filename));
  String stemp;
  while ((stemp = bufferedreader.readLine()) != null) {
   list.add(stemp);
  }
}

public List getList() throws IOException {
  return list;
}

public int getRowNum() {
  return list.size();
}

public int getColNum() {
  if (!list.toString().equals("[]")) {
   if (list.get(0).toString().contains(",")) {
    return list.get(0).toString().split(",").length;
   } else if (list.get(0).toString().trim().length() != 0) {
    return 1;
   } else {
    return 0;
   }
  } else {
   return 0;
  }
}

public String getRow(int index) {
  if (this.list.size() != 0)
   return (String) list.get(index);
  else
   return null;
}

public String getCol(int index) {
  if (this.getColNum() == 0) {
   return null;
  }
  StringBuffer scol = new StringBuffer();
  String temp = null;
  int colnum = this.getColNum();
  if (colnum > 1) {
   for (Iterator it = list.iterator(); it.hasNext();) {
    temp = it.next().toString();

    scol = scol.append(temp.split(",")[index] + ",");
   }
  } else {
   for (Iterator it = list.iterator(); it.hasNext();) {
    temp = it.next().toString();
    scol = scol.append(temp + ",");
   }
  }
  String str = new String(scol.toString());
  str = str.substring(0, str.length() - 1);
  return str;
}

public String getString(int row, int col) {
  String temp = null;
  int colnum = this.getColNum();
  if (colnum > 1) {
   temp = list.get(row).toString().split(",")[col];
  } else if (colnum == 1) {
   temp = list.get(row).toString();
  } else {
   temp = null;
  }
  return temp;
}

public void CsvClose() throws IOException {
  this.bufferedreader.close();
}

public void test() throws IOException {
  CsvUtil1 cu = new CsvUtil1("D:/学习/00dw.csv");
  List tt = cu.getList();
  for (Iterator itt = tt.iterator(); itt.hasNext();) {
   System.out.println(itt.next().toString()+"||");
  }
//  System.out.println(cu.getRowNum());
//  System.out.println(cu.getColNum());
//  System.out.println(cu.getRow(0));
//  System.out.println(cu.getCol(0));
//  System.out.println(cu.getString(0, 0));
  cu.CsvClose();

}

public void createCsvTest1(HttpServletResponse Response) throws IOException {
  CsvUtil1 cu = new CsvUtil1("D:/学习/00dw.csv");
  List tt = cu.getList();
  String data = "";
 

  SimpleDateFormat dataFormat = new SimpleDateFormat("yyyyMMddHHmm");
  Date today = new Date();
     String dateToday = dataFormat.format(today);
     File file=new File("D:/学习/001dw.csv");
     if(!file.exists())
     file.createNewFile(); 
//     else
//      file.delete() ;
     String str[]  ;
     StringBuilder sb = new StringBuilder("");
   BufferedWriter output=new BufferedWriter(new FileWriter(file,true));
  for (Iterator itt = tt.iterator(); itt.hasNext();) {
   String fileStr = itt.next().toString() ;
   str = fileStr.split(",");
   for(int i=0;i<=str.length-1;i++){ //拆分成数组 用于插入数据库中
    System.out.print("str["+i+"]="+str[i]+" ");
   }
   System.out.println("");
   sb.append(fileStr+"/r/n") ;
  }
  //System.out.println(sb.toString());
  output.write(sb.toString());   
  output.flush() ;
  output.close();
  cu.CsvClose();

}
public static void main(String[] args) throws IOException {
  CsvUtil1 test = new CsvUtil1();
  //test.test();
  HttpServletResponse response = null ;
  test.createCsvTest1(response);
}
}