读取一个arrayList并将其存储在File Java中

Question

我想读取一个arrayList并将这些字符串存储到一个文件中。 这是我的一些代码：

output = new Formatter(nameFile + ".txt");

 while (textLines.hasNext()){
        output.format(nameFile, textLines);
    }

Answer 1

public class test1 {

    public static void main(String args[]) throws IOException{

        StringBuffer sb = new StringBuffer();
        String filepath = "test.txt";
        List<String> list = new ArrayList<String>(); 
        list.add("1");
        list.add("2");
        list.add("3");
        list.add("4");
        list.add("5");
        list.add("6");

        Iterator<String> it = list.iterator();
        while(it.hasNext())
        {
            sb.append(it.next());
            sb.append(",");
        }

        BufferedWriter bw = new BufferedWriter(new FileWriter(filepath));
        bw.write(sb.toString());
        bw.flush();
        bw.close();
    }
}

Answer 2

试试这个

 PrintWriter writer = new PrintWriter("file-name.txt");
 for(String s:yourList)    //iterate your ArrayList here
 {
    writer.println(s);
 }
 writer.close();