热敏网口打印机连接方式

打印机用Socket连接，端口号一般固定为9100。

private Socket socket;

/**
 * 连接打印机
 */
public boolean connecte(String ipAddress) {
    try {
        if (socket != null && socket.isConnected()) {
            socket.close();
        }
        SocketAddress ipe = new InetSocketAddress(ipAddress, 9100);
        socket = new Socket();
        //设置连接和超时时间
        socket.connect(ipe, 2000);
        return socket.isConnected();
    } catch (IOException e) {
    }
    return false;
}

/**
 * 断开打印机
 * @return
 */
@Override
public boolean close() {
    try {
        if (socket != null && socket.isConnected()) {
            socket.close();
        }
        socket = null;
        return true;
    } catch (IOException e) {
    }

    return false;
}

/**
 * 打印操作
 * @throws IOException
 */
public void print(byte[] bs) throws IOException {
    if (bs.length > 0) {
        socket.getOutputStream().write(bs);
        socket.getOutputStream().flush();
    }
}

/**
 * 打印机是否连接
 */
public boolean isConnected() {
    return (socket != null && socket.isConnected());
}