java - CSVWriter 不允许写入文件

Question

我想将数据保存到 CSV 文件中。我使用 Scanner 读取 -> CSVWriter 保存。

我收到错误:不兼容的类型:List[String] 无法转换为 String[]。

方法:

private static void insertToFile(String source, String target)
{   
    List<String> data = new ArrayList<String>();
    try{
    Scanner sc = new Scanner(new File(source));

    while (sc.hasNextLine()) {
        data.add(sc.nextLine());
    }
    sc.close();
    }
    catch(Exception e){
    e.printStackTrace();
    }

       File resfile = new File(target);      

        try{
            CSVWriter writer = new CSVWriter(new FileWriter(resfile, true));

             //BufferedWriter bufferedWriter = new BufferedWriter(writer);

            for (String j : data) {
              //writer.writeAll(data);//error here
            }

               writer.close();
            }
        catch(Exception e){
                e.printStackTrace();
        }
    }

Answer 1

问题是

writer.writeAll接受String[]作为输入，您传递 List<String>

改变

for (String j : data) {
   //writer.writeAll(data);//error here
}

至

writer.writeAll(data.toArray(new String[data.size()]));将解决问题。