我正在使用终端仿真器库来创建终端,然后我用它将通过串口输入的数据发送到串行设备。不是我有那个工作我想在屏幕上创建一些其他图形界面,可能只是一个textBox,它显示了用户的结果的简短版本以及终端中的完整版本。他们只需浏览一下即可快速查看结果。我想知道如何最好地解析它。当我发送一个命令时,一个字节数组被发回给我,包含这样的数据作为一组结果的例子:
Interface IP-Address Status Protocol
vlan1 192.168.1.1 up up
Fa0/1i unassigned administratively down down
Fa0/1o unassigned down down
Fa1/0 unassigned down down
Fa1/1 unassigned down down
Fa1/2 unassigned down down
Fa1/3 unassigned down down
Fa1/4 unassigned down down
Fa1/5 unassigned down down
Fa1/6 unassigned down down
Fa1/7 unassigned down down
Fa1/8 unassigned up up
Fa1/9 unassigned down down
Fa1/10 unassigned up up
Fa1/11 unassigned down down
Gi0 unassigned up up
switch#
我该如何解析这个?我想要的是“接口vlan1的IP为192.1.1.168”或“接口Fa1 / 8接收到未分配的IP地址”。为用户显示,只列出最相关的数据。我会说些什么:
if (dataReceived.charAt(i) == 'v'
&& dataReceived.charAt(i + 1) == 'l'
&& dataReceived.charAt(i + 2) == 'a'
&& dataReceived.charAt(i + 3) == 'n')
&& dataReceived.charAt(i + 4) == '1')
&& etc //check i is in bounds, check is the next non-whitespace character a number or a u somehow and so on
{
//do things here
//print out "The interface vlan1 is up with an IP of 192.1.1.168"
}
这种方式看起来相当繁琐,检查每个字节,查看下一个字节是什么等等。这是最好/最正确的方式吗?
编辑:这是我目前的样本,我正在接收数据,我正在测试某些数据:
public void onDataReceived(int id, byte[] data) {
dataReceived = new String(data);
try {
dataReceivedByte = dataReceived.getBytes("ASCII");
} catch (UnsupportedEncodingException e) {
Log.d(TAG, "exception");
e.printStackTrace();
}
statusBool = true;
Log.d(TAG, "in data received " + dataReceived);
((MyBAIsWrapper) bis).renew(data);
runOnUiThread(new Runnable(){
@Override
public void run() {
}});
viewHandler.post(updateView);
}
Handler viewHandler = new Handler();
Runnable updateView = new Runnable() {
@Override
public void run() {
mEmulatorView.invalidate();
if (statusBool == true) {
for (int i = 1; i < dataReceived.length() - 1; i++) {
if (dataReceived.charAt(i) == '>') {
Log.d(TAG, "found >");
deviceStatus = 0;
}
if (dataReceived.charAt(i) == '#'
&& dataReceived.charAt(i - 1) != ')') {
Log.d(TAG, "found #");
deviceStatus = 1;
}
if ((i + 1) <= (dataReceived.length())
&& dataReceived.charAt(i) == ')'
&& dataReceived.charAt(i + 1) == '#') {
Log.d(TAG, "found config )#");
deviceStatus = 2;
}
}
statusBool = false;
viewHandler.postDelayed(updateView, 1000);
}
}
};
答案 0 :(得分:1)
当您使用charAt()
时,我认为dataReceived
是String
。如果没有,将数据转换为字符串可能会很方便,因为您可以使用方便的String
方法。您可以使用String(byte[])
构造函数将字节数组转换为字符串。
因此,您还可以使用contains()
方法检查字符串是否包含特定的子字符串:
if(dataReceived.contains("vlan1")) {
// do things here
}
或者,如果您对子字符串的位置感兴趣,可以使用indexOf()
。
答案 1 :(得分:1)
这将非常容易正确解析,但它在一个地方从结构良好的表降级为自由文本。下面的代码使用补丁替换;这不是很干净的解决方案。如果某些分隔符(如\ t)仅存在于列之间而不存在于列中的单词之间,则使用它会更好。解析固定宽度的部分是可能的,但也是一团糟。
假设输入是字符串x:
class Record {
String mItf, mIp, mStatus, mProt;
}
ArrayList<Record> records = new ArrayList<Record>();
StringTokenizer st = new StringTokenizer(x,"\r\n");
// Line by line but do not split at spaces.
st.nextToken(); // Discard the header line.
while (st.hasMoreTokens()) {
String line = st.nextToken();
// Group in a single word problematic two word cases (may be multiple):
line = line.replace("administratively down","administratively_down");
StringTokenizer sr = new StringTokenizer(line);
if (sr.countTokens() >= 4) {
Record r = new Record();
r.mItf = sr.nextToken();
r.mIp = sr.nexttoken();
r.mStatus = sr.nextToken();
r.mProt = sr.nextToken();
records.add(r);
}
}
之后,你可以做你喜欢的概括。