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);
    }
}

import
import
import
import java.util.Scanner;

/** 用FileOutputStream类往指定文件中写入数据 */
public class FileOutputStreamTest {
    public static void main(String[] args) {
        FileOutputStream out = null;
        Scanner scan=new Scanner(System.in);
        try {
            //step1: 创建一个向指定名的文件中写入数据的FileOutputStream
            //第二个参数设置为true表示：使用追加模式添加字节
            out = new FileOutputStream("E:\\fname.txt",true);
            
            //step2: 写数据
           System.out.println("请输入内容：");
            out.write(scan.next().getBytes());
         
            
            //step3: 刷新此输出流
            out.flush();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) { // 捕获IO异常
            e.printStackTrace();
        }finally{
            if(out != null){
                try {
                    out.close();  //step4: 关闭输出流
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
我按照我的想法写了一个，你参考下。

import
import
import
import java.util.Scanner;

/** 用FileOutputStream类往指定文件中写入数据 */
public class FileOutputStreamTest {
    public static void main(String[] args) {
        FileOutputStream out = null;
        Scanner scan=new Scanner(System.in);
        System.out.println("请输入文件名");
        String str=scan.next();
        try {
            //step1: 创建一个向指定名的文件中写入数据的FileOutputStream
            //第二个参数设置为true表示：使用追加模式添加字节
            out = new FileOutputStream("E:\\"+str,true);
            
            //step2: 写数据
            System.out.println("请输入内容：");
            out.write(scan.next().getBytes());
            
            //step3: 刷新此输出流
            out.flush();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) { // 捕获IO异常
            e.printStackTrace();
        }finally{
            if(out != null){
                try {
                    out.close();  //step4: 关闭输出流
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
又完善了下，可以实现你想要做的功能了