/**   
 * @Title t.java
 * @Package test
 * @Description TODO(用一句話描述該檔案做什麼)
 * @author zqs
 * @date 2013年11月28日 上午9:51:05
 * @version V1.0   
*/
package test;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
 
public class t {
 
    public static String request(String url) {
        StringBuffer res = new StringBuffer();
        HttpURLConnection conn = null;
        try {
            URL serverUrl = new URL(url);
            conn = (HttpURLConnection) serverUrl.openConnection();
            conn.setRequestMethod("GET");
            conn.setConnectTimeout(10000);
            conn.setReadTimeout(10000);
            conn.connect();
            InputStream ins = conn.getInputStream();
            String charset = "UTF-8";
            InputStreamReader inr = new InputStreamReader(ins, charset);
            BufferedReader bfr = new BufferedReader(inr);
            String line = "";
            do {
                res.append(line);
                line = bfr.readLine();
            } while (line != null);
            inr.close();
            bfr.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (conn != null) {
                conn.disconnect();
            }
        }
        return res.toString();
    }
 
    public static void main(String[] args) throws Exception {
        String keyword = "CRM";
        String site = "metasoft";
        keyword = URLEncoder.encode(keyword, "utf-8");
        int p = 1;
        int s = 10;
        String url = "http://www.baidu.com/s?wd=%s&pn=%s&ie=utf-8&usm=1&rsv_page=1";
        while (true) {
            int pn = (p - 1) * s;
            String _url = String.format(url, keyword, pn + "");
            System.out.println("Request url " + _url);
            String html = request(_url);
            if (html.indexOf(site) != -1) {
                System.out.println("Find keyword");
                break;
            }
            p++;
        }
 
    }
}

速度有點慢，執行多少行即為百度的排名值