DataInputStream和OutputStream的写入/读取字符串长度

Question

如何与DataInputStream，这是存储与此代码读取String：

DataOutputStream dataOut = new DataOutputStream (out); // Some other stream 
String title = processed.getTitle(); 
dataOut.writeInt(title.length()); 
dataOut.writeBytes(title); 

Answer 1

你可以这样写。

DataInputStream dataIn = new DataInputStream (input); 
int length = dataIn.readInt(); 
byte[] array = new byte[length]; 
dataIn.read(array); 

Answer 2

您可以使用ByteArrayOutputStream和ByteArrayInputStream和字节数组作为中间缓冲..

ByteArrayOutputStream out = new ByteArrayOutputStream(); 

// Some other streams 
DataOutputStream dataOut = new DataOutputStream (out); 
String title = processed.getTitle(); 
dataOut.writeInt(title.length()); 
dataOut.writeBytes(title); 

ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray()); 
DataInputStream dataIn = new DataInputStream(in); 

Answer 3

dataOut.writeUTF(title); 
// ... 
String title = dataIn.readUTF(); 

...写在这个时候提供的标题并不需要超过65533个字节格式：请参阅Javadoc。