Android中Socket通訊類【Json】

轉載，不清楚原文出處，不貼連結了

public class SocketClient {    public boolean mClientFlag = false;    private static Socket client;            public SocketClient()    {        Log.d("WineStock", "WineStock SocketClient()");        client = new Socket();    }            public SocketClient(String HostName, int iPort)    {        client=new Socket();        SocketAddress socketAddress = new InetSocketAddress(HostName, iPort);        try        {            Log.d("WineStock", "WineStock SocketClient connect");            client.connect(socketAddress, 3000);        }        catch (IOException e) {            // TODO Auto-generated catch block            Log.d("WineStock", "WineStock SocketClient IOException");                    } catch (IllegalArgumentException e1) {            // TODO: handle exception            Log.d("WineStock", "WineStock SocketClient IllegalArgumentException ");                   }                return ;    }        public boolean SocketConnect(String HostName, int iPort)    {                SocketAddress socketAddress = new InetSocketAddress(HostName, iPort);        try        {            Log.d("WineStock", "WineStock SocketConnect connect ");                        client.connect(socketAddress, 3000);        }        catch (IOException e) {            // TODO Auto-generated catch block            Log.d("WineStock", "WineStock SocketConnect IOException ");                    } catch (IllegalArgumentException e1) {            // TODO: handle exception            Log.d("WineStock", "WineStock SocketConnect IllegalArgumentException ");                    }                return true;    }        public void SocketClose()     {        try {            client.close();        } catch (IOException e) {            // TODO Auto-generated catch block            Log.d("WineStock", "socket close error"+e.getMessage());        }            }        // 建立串連    public static boolean SClient(SocketSendModel SendModel) throws UnknownHostException, IOException    {        boolean bRet = false;        try        {            if(client.isConnected())            {                //發送請求                sendMessage(SendModel);                bRet    =    true;            }        }        catch (UnknownHostException e)        {             Log.d("WineStock", "socket SClienterror"+e.getMessage());        }        catch (IOException e1)        {             Log.d("WineStock", "socket SClienterror"+e.getMessage());        }                return bRet;                    }    // 發送請求    private static void sendMessage(SocketSendModel model) throws IOException     {        //boolean bRet = false;        try        {            PrintWriter out = new PrintWriter(client.getOutputStream());            out.print(objToJsonString(model).replace("\n", " "));            out.flush();            //bRet = true;        }        catch (IOException e)        {                    }                return;    }            // 接收伺服器資料    public static String readMessage() throws IOException    {        String str    =    "";        try        {            BufferedReader br = new BufferedReader(new InputStreamReader(client.getInputStream()));            str    =    br.readLine().replace("{", "").replace("}", "").replace("\"", "");        }        catch ( IOException e)        {                    }                return str;            }    // 將Java Object對象轉換為Json對象    private  static String objToJsonString(Object obj) {        // 初始化傳回值        String json = "str_empty";        if (obj == null) {            return json;        }        StringBuilder buff = new StringBuilder();        Field fields[] = obj.getClass().getFields();        try {            buff.append("[");            buff.append("{");            int i = 0;            for (Field field : fields) {                if (i != 0) {                    buff.append(",");                }                buff.append(field.getName());                buff.append(":");                buff.append("\"");                buff.append(field.get(obj) == null ? "" : field.get(obj));                buff.append("\"");                i++;            }            buff.append("}");            buff.append("]");            json = buff.toString();        } catch (Exception e) {            throw new RuntimeException("cause:" + e.toString());        }        return json;    }}