写入到ByteArrayOutputStream时缺少NewLines

Question

我正在尝试读取txt文件并使用套接字传递数据，但看起来像在写入outputstream时缺少新行。

我的txt文件是：

{ 
    "firstName": "John", 
    "lastName": "Smith", 
    "isAlive": true, 
    "age": 25, 
    "address": { 
    "streetAddress": "21 2nd Street", 
    "city": "New York", 
    "state": "NY", 
    "postalCode": "10021-3100" 
    } 
} 

---

ByteArrayOutputStream：

{ “名字”： “约翰”， “姓氏”： “史密斯”， “的IsAlive”： 真，“年龄”：25，“地址”：{％“streetAddress”：“21 2nd Street”，“city”：“New York”，“state”：“NY”，
“postalCode”：“ 3100“}}

---

SCANER：

private byte[] readFile(String path) throws IOException { 

    ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
    DataOutputStream out = new DataOutputStream(baos); 

    File file = new File(path); 
    Scanner scanner = new Scanner(file); 

    while (scanner.hasNextLine()){ 
     out.writeUTF(scanner.nextLine()); 
    } 

    byte[] bytes = baos.toByteArray(); 
    return bytes; 
} 

编辑：

System.getProperty("line.separator"); 

帮我新的生产线，但我仍然得到一些无效字符baos

System.out.println(new String(baos.toByteArray())); 

Answer 1

看起来像.flush()帮我清除无效字符重写代码...

private byte[] readFile(String path) throws IOException { 

    DataOutputStream out = new DataOutputStream(socket.getOutputStream()); 

    File file = new File(path); 
    Scanner scanner = new Scanner(file); 

    while (scanner.hasNextLine()){ 
     out.writeUTF(scanner.nextLine() + System.getProperty("line.separator")); 
    } 

    byte[] bytes = out.toByteArray(); 
    out.flush(); 
    return bytes; 
} 

What is the purpose of flush() in Java streams?

Answer 2

使用下面

while (scanner.hasNextLine()){ 
     out.writeUTF(scanner.nextLine()+"\n"); 
    }