题目：从键盘中输入文件的内容和要保存的文件的地址，将内容保存到该文件中；

我的代码如下，运行结果不行啊（我是自学的，代码难免有不规范之处，望指点。）


package cn;

import
import
import
import
import java.util.Scanner;

public class TestDemo3 {

    @SuppressWarnings("resource")
    public static void main(String[] args) throws IOException {

        Scanner scan = null;
        System.out.println("请输入文件名：");
        scan = new Scanner(System.in);
        File file = new File(scan.next());
        if (!file.exists()) {
            try {
                file.createNewFile();
            } catch (IOException e) {

                e.printStackTrace();
            }
        }

        OutputStream output = new FileOutputStream(file, true);

        System.out.println("请输入内容：");
        scan = new Scanner(System.in);
        scan.useDelimiter("\n");
        while (scan.hasNext() && scan.next() != "exit") {

            output.write(scan.next().getBytes());
            scan = new Scanner(System.in);
            scan.useDelimiter("\n");
        }
        output.close();
        System.exit(0);
    }
}