2015年7月29日随笔档案 - march alex's blog

2015年7月29日

Client端：

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class ChatClient {
    private static final String SERVER_IP = "127.0.0.1";
    private static final int SERVER_PORT = 8888;

    Socket socket = null;
    DataOutputStream dos = null;
    DataInputStream dis = null;
    private boolean bConnected = false;

    private static Scanner in = new Scanner(System.in);
    private static String hostInfo = null;

    Thread tRecv = new Thread(new RecvThread());

    public static void main(String[] args) {
        new ChatClient().launch();
    }

    public void launch() {
        connect();
        tRecv.start();
    }

    public void connect() {
        try {
            socket = new Socket(SERVER_IP, SERVER_PORT);
            dos = new DataOutputStream(socket.getOutputStream());
            dis = new DataInputStream(socket.getInputStream());
            bConnected = true;

            InetAddress addr = InetAddress.getLocalHost();
            String ip = addr.getHostAddress().toString();// 获得本机IP
            String address = addr.getHostName().toString();// 获得本机名称
            hostInfo = ip + "\t" + address + "\tconnected.";
            System.out.println(hostInfo);
            dos.writeUTF(hostInfo);
            dos.flush();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void disconnect() throws IOException {
        try {
            dos.close();
            dis.close();
            socket.close();
        } catch (IOException e) {
        }
    }

    private class RecvThread implements Runnable {
        public void run() {
            while (bConnected) {
                try {
                    if (in.hasNext()) {
                        String talk = in.nextLine();
                        if (talk.equals("quit")) {
                            disconnect();
                            bConnected = false;
                            break;
                        }
                        dos.writeUTF(talk);
                        dos.flush();
                    }
                    String talk = dis.readUTF();
                    System.out.println(talk);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

server端：

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.IOException;
import java.net.BindException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;

public class ChatServer {
    boolean started = false;
    ServerSocket ss = null;

    List<Client> clients = new ArrayList<Client>();

    public static void main(String[] args) {
        new ChatServer().start();
    }

    public void start() {
        try {
            ss = new ServerSocket(8888);
            started = true;
        } catch (BindException e) {
            System.err.println("port in use.please stop program using this port and restart.");
            System.exit(0);
        } catch (IOException e) {
            e.printStackTrace();
        }

        try {
            while(started) {
                Socket s = ss.accept();
                Client c = new Client(s);
                // System.out.println("a client connected.");
                new Thread(c).start();
                clients.add(c);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                ss.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

    class Client implements Runnable {
        private Socket s;
        private DataInputStream dis = null;
        private DataOutputStream dos = null;
        private boolean bConnected = false;

        public Client(Socket s) {
            this.s = s;
            try {
                dis = new DataInputStream(s.getInputStream());
                dos = new DataOutputStream(s.getOutputStream());
                bConnected = true;
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        public void send(String str) {
            try {
                dos.writeUTF(str);
                dos.flush();
            } catch (IOException e) {
                clients.remove(this);
                System.out.println("a client quit.");
                //e.printStackTrace();
            }
        }

        public void run() {
            try {
                while(bConnected) {
                    String str = dis.readUTF();
                    solveTalk(str);
                }
            } catch (EOFException e) {
                System.out.println("Client closed!");
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    if(dis != null) dis.close();
                    if(dos != null) dos.close();
                    if(s != null) {
                        s.close();
                        s = null;
                    }
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }
        }

        private void solveTalk(String talk) {
            System.out.println(talk);
            for(int i=0;i<clients.size();i++) {
                Client c = clients.get(i);
                c.send(talk);
            }
        }
    }

}

posted @ 2015-08-18 10:03 marchalex 阅读(358) | 评论 (0) | 编辑收藏

Java正则表达式

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexTestHarnessV4 {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(
                new InputStreamReader(new BufferedInputStream(System.in))
            );
        while (true) {
            System.out.print("\nEnter your regex: ");
            Pattern pattern = Pattern.compile(br.readLine());
            System.out.print("Enter input string to search: ");
            Matcher matcher = pattern.matcher(br.readLine());
            boolean found = false;
            while (matcher.find()) {
                System.out.println("I found the text \"" + matcher.group() +
                        "\" starting at index " + matcher.start() +
                        " and ending at index " + matcher.end() +
                        ".");
                found = true;
            }
            if (!found) {
                System.out.println("No match found.");
            }
        }
    }
}

样例：

Enter your regex: [0-9]+
Enter input string to search: fdsdffd9090fd
I found the text "9090" starting at index 7 and ending at index 11.

Enter your regex: class="fav-num[^"]*"[^>]*>[^<]*
Enter input string to search: <i class="litb-icon-fav-on"></i><i class="litb-icon-fav-off"></i><span class="fav-num">(151)</span>
I found the text "class="fav-num">(151)" starting at index 71 and ending at index 92.

资料：

http://blog.csdn.net/yaerfeng/article/details/28855587

posted @ 2015-08-12 13:58 marchalex 阅读(309) | 评论 (0) | 编辑收藏

Java获得某个URL对于某个关键词在Google搜索结果中的排名的程序（3）

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class GoogleFinderNew {

    private static String address = "https://www.google.com.hk/search?hl=en&q=";
    private static String query = "";
    private static String charset = "UTF-8";

    private static List<String> useragentList = new ArrayList<String>();

    private static void initUserAgentList(String filename) throws IOException {
        BufferedReader reader = new BufferedReader(new FileReader(filename));
        String line = null;
        while((line = reader.readLine()) != null){
            useragentList.add(line.trim());
        }
        reader.close();
        return;
    }

    private static List<String> getpages(URL url) throws IOException {
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        BufferedReader reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
        String line;
        String ans = "";
        while ((line = reader.readLine()) != null){
             ans += line + "\n";
        }
        int st = -1, ed = 0;
        List<String> pagesList = new ArrayList<String>();

        while((st = ans.indexOf("<h3 class=\"r\"><a href=\"", ed)) != -1) {
            ed = ans.indexOf("\"", st+23);
            //System.out.println(ans.substring(st+23, ed));
            pagesList.add(ans.substring(st+23, ed));
        }
        return pagesList;
    }

    public static void main(String[] args) throws MalformedURLException, IOException, InterruptedException {

        Scanner in = new Scanner(System.in);
        String askurl = in.nextLine();
        query = in.nextLine();

        initUserAgentList("D:\\useragent.txt");

        //System.setProperty("http.agent", "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/525.19 (KHTML, like Gecko) Chrome/0.3.154.9 Safari/525.19");

        int pages = 10;

        for(int i=0;i<pages;i++) {
            System.out.println((i+1) + " ..");

            int index = (int)(useragentList.size()*Math.random());
            if(index == useragentList.size()) index --;
            String theUserAgent = useragentList.get(index);

            System.setProperty("http.agent", theUserAgent);

            String urlString = address + URLEncoder.encode(query, charset);
            if(i != 0) urlString += "&start=" + i + "0";
            //System.out.println(urlString);
            List<String> list = getpages(new URL(urlString));
            for(String page : list) {
                if(page.contains(askurl)) {
//                if(page.equals(askurl)) {
                    System.out.println(askurl + " found in the " + (i+1) + " th page.");
                    System.out.println(page);
                    return;
                }
            }
            int extraTime = 0; //(int)(3000 * Math.random());
            Thread.sleep(1000 + extraTime);
        }

        System.out.println("can't find " + askurl + " in the first " + pages + " pages.");
    }
}

posted @ 2015-07-29 16:41 marchalex 阅读(262) | 评论 (0) | 编辑收藏

Java获得某个URL对于某个关键词在Google搜索结果中的排名的程序

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.List;
import java.util.Scanner;
import java.util.StringTokenizer;

import com.google.gson.Gson;

public class GoogleFinder {

    public static void main(String[] args) throws IOException, InterruptedException {

        String address = "http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=";
        String query = "";
        String charset = "UTF-8";

        Scanner in = new Scanner(System.in);
        String targeturl = in.nextLine();
        query = in.nextLine();

        for(int i=0;i<125;i++) {

            URL url = new URL(address + URLEncoder.encode(query, charset) + "&start=" + i);

            //System.out.println(url);
            Reader reader = new InputStreamReader(url.openStream(), charset);
            GoogleResults results = new Gson().fromJson(reader, GoogleResults.class);

            for(int t=0;t<30;t++) {
                System.out.print(".");
                Thread.sleep(2000);
            } System.out.println("");

            for(int j=0;j<4;j++) {

                String ss = results.getResponseData().getResults().get(j).getUrl().toLowerCase();
                if(ss.contains(targeturl)) {
                    System.out.println(ss);
                    System.out.println(results.getResponseData().getResults().get(j).getTitle());
                    System.out.println("Found in the " + (i*4+j+1) + " th");
                    return;
                }
            }
            System.out.println("" + ((i+1)*4) + " pages found.");
        }

        System.out.println("Can find " + targeturl + " in the first 500 pages");

    }
}

class GoogleResults {

    private ResponseData responseData;

    public ResponseData getResponseData() {
        return responseData;
    }

    public void setResponseData(ResponseData responseData) {
        this.responseData = responseData;
    }

    public String toString() {
        return "ResponseData[" + responseData + "]";
    }

    static class ResponseData {
        private List<Result> results;

        public List<Result> getResults() {
            return results;
        }

        public void setResults(List<Result> results) {
            this.results = results;
        }

        public String toString() {
            return "Results[" + results + "]";
        }
    }

    static class Result {
        private String url;
        private String title;

        public String getUrl() {
            return url;
        }

        public String getTitle() {
            return title;
        }

        public void setUrl(String url) {
            this.url = url;
        }

        public void setTitle(String title) {
            this.title = title;
        }

        public String toString() {
            return "Result[url:" + url + ",title:" + title + "]";
        }
    }
}

posted @ 2015-07-29 14:16 marchalex 阅读(280) | 评论 (0) | 编辑收藏

Java获得某个URL对于某个关键词在Google搜索结果中的排名的程序（2）

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class GoogleFinderNew {

    private static String address = "https://www.google.com.hk/search?hl=en&q=";
    private static String query = "";
    private static String charset = "UTF-8";

    private static void test() {
        String ans = "abc<h3>helloworld</h3>hehe<h3>nicetomeetyou</h3>";
        int st = ans.indexOf("<h3>");
        int ed = ans.indexOf("</h3>");
        System.out.println(st + "   " + ed);
        System.out.println(ans.substring(st+4, ed));
    }

    private static List<String> getpages(URL url) throws IOException {
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        BufferedReader reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
        String line;
        String ans = "";
        while ((line = reader.readLine()) != null){
             ans += line + "\n";
        }
        int st = -1, ed = 0;
        List<String> pagesList = new ArrayList<String>();

        while((st = ans.indexOf("<h3 class=\"r\"><a href=\"", ed)) != -1) {
            ed = ans.indexOf("\"", st+23);
            //System.out.println(ans.substring(st+23, ed));
            pagesList.add(ans.substring(st+23, ed));
        }
        return pagesList;
    }

    public static void main(String[] args) throws MalformedURLException, IOException, InterruptedException {

        Scanner in = new Scanner(System.in);
        String askurl = in.nextLine();
        query = in.nextLine();

        System.setProperty("http.agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.11 TaoBrowser/2.0 Safari/536.11");

        int pages = 100;

        for(int i=0;i<pages;i++) {
            System.out.println((i+1) + " ..");
            String urlString = address + URLEncoder.encode(query, charset);
            if(i != 0) urlString += "&start=" + i + "0";
            //System.out.println(urlString);
            List<String> list = getpages(new URL(urlString));
            for(String page : list) {
                if(page.contains(askurl)) {
//                if(page.equals(askurl)) {
                    System.out.println(askurl + " found in the " + (i+1) + " th page.");
                    System.out.println(page);
                    return;
                }
            }
            Thread.sleep(1000);
        }

        System.out.println("can't find " + askurl + " in the first " + pages + " pages.");
    }
}

posted @ 2015-07-29 14:16 marchalex 阅读(300) | 评论 (0) | 编辑收藏

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