思路：先整理好所有域名后辍的whois主机地址，把他做成xml打包进APP，查域名的时候获取这个XML对应的主机地址，再用socket连接到这个地址，发送/接收信息（这个XML文件在assets下）。
先上截图：
（这个whois.xml是我十年前做的，我发了很长时间收集了大部分可靠的WHOIS主机，在这里这个文件才最有价值）
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MainActivity代码：
class="brush:java;gutter:true;">package cn.net.vb.whois.whois;
import android.app.ProgressDialog;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.List;
public class MainActivity extends ActionBarActivity {
private static final int DEFAULT_PORT = 43;
TextView tv1;
String strinfo;
EditText txtdomain;
//装载Beauty类型的链表，其内容由XML文件解析得到
private List<Beauty> beautyList;
private ProgressDialog pd;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv1 = (TextView) findViewById(R.id.tv1);
txtdomain = (EditText) findViewById(R.id.txtdomain);
//开始按钮
Button button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//提示框，这样写在WINFORM是动画是动不了的，但Activity可以
pd = ProgressDialog.show(MainActivity.this, "请稍等", "正在从whois主机获取信息");
//启动线程
mHandler(txtdomain.getText().toString());
}
});
}
//获取XML里的WHOIS主机
private String get_whois_xml_server(String domain) {
String result = "";
String[] arr;
String tld="";
String serv="";
try {
//通过assertmanager的open方法获取到beauties.xml文件的输入流
InputStream is = getResources().getAssets().open("whois.xml"); // 这个文件在assets下
//初始化自定义的实现类BeautyParserImpl
BeautyParserImpl pbp = new BeautyParserImpl();
//调用pbp的parse()方法，将输入流传进去解析，返回的链表结果赋给beautyList
beautyList = pbp.parse(is);
} catch (Exception e) {
e.printStackTrace();
}
for (Beauty b : beautyList) {
result = b.toString();
//看Beauty.java文件，arr[0]是域名后辍，arr[1]就是主机名
arr=result.split("===");
//在JAVA中，判断字符串相等要用equals，而不是像其它程序那样用==，习惯害死人
if(getTLD(domain).equals(arr[0].toString())){
serv =arr[1].toString();
break;
}
}
return serv;
}
//子线程，当接收到WHOIS信息就关半那个提示框
private void mHandler(final String strname) {
Thread thread = new Thread() {
@Override
public void run() {
Message message = handler2.obtainMessage();
message.arg1 = 1;
message.obj = getwhois(strname).toString();
handler2.sendMessage(message);
pd.dismiss();// 关闭ProgressDialog
}
};
thread.start();
thread = null;
}
//更新UI
final Handler handler2 = new Handler() {
@Override
public void handleMessage(Message msg) {
tv1.setText(String.valueOf(msg.obj.toString()));
}
};
//用Socket连接到WHOIS服务器获取信息
private String getwhois(String domain) {
try {
//获取xml里的whois地址
String whoisaddress = get_whois_xml_server(domain);
Log.i("whois_server=======",whoisaddress.toString());
//创建socket，并指定主机和端口
Socket socket = new Socket(whoisaddress, DEFAULT_PORT);
String lineSeparator = "\r\n";
PrintWriter out = new PrintWriter(socket.getOutputStream());
out.println(domain);
out.flush();
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
StringBuilder ret = new StringBuilder();
String line;
while ((line = in.readLine()) != null) {
ret.append(line + lineSeparator);
}
socket.close();
//Log.i("WHOIS_info======:", ret.toString());
return ret.toString();
} catch (IOException e) {
e.printStackTrace();
return e.getMessage().toString();
}
}
//获取域名后辍
private String getTLD(String domain) {
final int index;
return (domain == null || (index = domain.lastIndexOf('.') + 1) < 1) ? domain
: (index < (domain.length())) ? domain.substring(index) : "";
}
// 读取assets文件
/* private void assetsRead(){
String fileName = "whois.xml";
String ret = "";
try {
InputStream is = getResources().getAssets().open(fileName);
int len = is.available();
byte []buffer = new byte[len];
is.read(buffer);
ret = EncodingUtils.getString(buffer, "utf-8");
is.close();
} catch (Exception e) {
e.printStackTrace();
}
tv1 = (TextView) findViewById(R.id.tv1);
tv1.setText(ret);
}*/
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
总结：
1、socket 肯定是不能运行在主线程上的，所以要创建一个新线程来运行socket
2、android解析XML好麻烦，不懂的同学请复制网上实例(我是直接从网上复制的) http://www.cnblogs.com/devinzhang/archive/2012/01/16/2323668.html
3、按习惯我都是把XML直接转成datatable，，，，可JAVA没有datatable，很郁闷，很不习惯。
4、不知为何，，，JAVA要不断的try，否则编译不过
项目源文件下载：http://files.cnblogs.com/files/LCX/whois.rar
APP下载：http://files.cnblogs.com/files/LCX/whois.apk
有兴趣的同学可以下载到真机测试
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