求解，写入csv文件怎么做

Answer 1

public static void addCloumn(List<String> pList, String filePath) throws IOException{
 BufferedReader bufReader = new BufferedReader(new FileReader(filePath));
 String lineStr = "";
 int rowNumber = 0;
 StringBuffer nContent = new StringBuffer();
 while((lineStr = bufReader.readLine()) != null){
  String addValue = "";
  if(rowNumber < pList.size()){
   addValue = pList.get(rowNumber);
  }
  if(lineStr.endsWith(",")){
   nContent.append(lineStr).append("\""+addValue+"\"");
  }else{
   nContent.append(lineStr).append(",\""+addValue+"\"");
  }
  rowNumber++;
  nContent.append("\r\n");
 }
 bufReader.close();
 
 FileOutputStream fileOs = new FileOutputStream(new File(filePath), false);
 fileOs.write(nContent.toString().getBytes());
 fileOs.close();
}