如何从DatagramPacket类检索字符串 [英] How to retrieve String from DatagramPacket

问题描述

下面code打印

[B@40545a60,[B@40545a60abc exp 

不过，我想打印农行，这样我就可以检索来自接收系统的正确的信息。

But I want to print abc, so that I can retrieve the correct message from the receiving system.

public class Operation {
InetAddress ip;
DatagramSocket dsock;
DatagramPacket pack1;
byte[] bin,bout;
WifyOperation(InetAddress Systemip)
{
    ip=Systemip;
    try {
        dsock=new DatagramSocket();

        } catch (SocketException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        }

}

void sendbyte()
{
    String senddata="abc"; 
    bout=senddata.getBytes();
    pack1=new DatagramPacket(bout,bout.length,ip,3322);
    try {
        dsock.send(pack1);
        Log.d(pack1.getData().toString(),"abc exp");
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}
}

我怎么可以检索字符串，而不是字节的数据包 PACK1 ？

推荐答案

做这样的事情：

byte[] data = pack1.getData();
InputStreamReader input = new InputStreamReader(
    new ByteArrayInputStream(data), Charset.forName("UTF-8"));

StringBuilder str = new StringBuilder();
for (int value; (value = input.read()) != -1; )
    str.append((char) value);

此假定字节数据重新presents（恰好）UTF-8文本，这可能并非如此。

This assumes the byte data represents (just) UTF-8 text, which may not be the case.

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