4.16学习总结 IO流综合练习

爬虫获取网站内的数据，获得完整姓名

网站一：姓氏

网站二：男生名字

网站三：女生名字

进行拼接，获取完整的男生女生姓名。

//导包
import org.apache.commons.io.FileUtils;
import java.io.*;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class test {
    public static void main(String[] args) throws IOException {
       String familynamenet="https://hanyu.baidu.com/shici/detail?pid=0b2f26d4c0ddb3ee693fdb1137ee1b0d&from=kg0";
       String boynamenet="http://www.haoming8.cn/baobao/10881.html//oracle.com/java/technologies/javase/javase-jdk8-downloads.html";
       String girlnamenet="http://www.haoming8.cn/baobao/7641.html//oracle.com/java/technologies/javase/javase-jdk8-downloads.html";
       String familynamestr=webcrawler(familynamenet);
       String boynamestr=webcrawler(boynamenet);
       String girlnamestr=webcrawler(girlnamenet);
       ArrayList<String> boynametemplist=getData(boynamestr,"([\\u4E00-\\u9FA5]){2}(、|。)",1);
       ArrayList<String> familynametemplist=getData(familynamestr,"(.{4})(,|.)",1);
       ArrayList<String> girlnametemplist=getData(girlnamestr,"(.. ){4}..",0);
       //处理数据
        ArrayList<String> familynamelist=new ArrayList<>();
       for(String str:familynametemplist) {
           for (int i = 0; i < str.length(); i++) {
               char c = str.charAt(i);
               familynamelist.add(c+"");
           }
       }
       ArrayList<String> boynamelist=new ArrayList<>();
       for(String str:boynametemplist) {
           if(!boynamelist.contains(str)){
               boynamelist.add(str);
           }
       }
       ArrayList<String> girlnamelist=new ArrayList<>();
       for(String str:girlnametemplist) {
           String[] arr=str.split(" ");
           for(int i=0;i<arr.length;i++){
               girlnamelist.add(arr[i]);
           }
       }
       //生成数据// 姓名（唯一）]
        getinfos(familynamelist,boynamelist,girlnamelist,10,10);
    }
    /*
    方法作用：
    获取男生和女生信息
    形参一：装着姓氏的集合
    参数二：装着男生姓名的集合
    参数三：装着女生姓名的集合
    参数四；男生个数
    参数五：女生个数
     */
    public static ArrayList<String>getinfos(ArrayList<String> familynamelist,ArrayList<String> boynamelist,ArrayList<String> girlnamelist,int boycount,int girlcount){
         //生成男生不重复的名字
        HashSet<String> boyhs=new HashSet<>();
        while(true){
            if(boyhs.size()==boycount){
                break;
            }
            Collections.shuffle(familynamelist);
            Collections.shuffle(boynamelist);
            boyhs.add(familynamelist.get(0)+boynamelist.get(0));
        }
        HashSet<String> girlhs=new HashSet<>();
        while(true) {
            if (girlhs.size() == girlcount) {
                break;
            }
            Collections.shuffle(familynamelist);
            Collections.shuffle(girlnamelist);
            girlhs.add(familynamelist.get(0) + girlnamelist.get(0));
        }
        System.out.println(boyhs);
        System.out.println(girlhs);
        return null;
    }
    /*
    getData()方法作用：
    根基正则表达式获取字符串中的数据。
    参数一：完整字符串
    参数二：正则表达式
    参数三：
    返回值：真正想要的数据
     */
    public static ArrayList<String> getData(String str,String regex,int index){
        ArrayList<String> list=new ArrayList<>();
        Pattern pattern=Pattern.compile(regex);
        Matcher matcher=pattern.matcher(str);
        while(matcher.find()){
            list.add(matcher.group(index));

        }
        return list;
    }
    /*
    webcrawler()方法作用：
    从网络中爬取数据，把数据拼接成字符串返回
    形参：网址
    返回值：爬取到的所有数据。
     */
    public static String webcrawler(String net) throws IOException {
        StringBuilder sb=new StringBuilder();
        URL url=new URL(net);
        URLConnection conn=url.openConnection();
        InputStreamReader isr=new InputStreamReader(conn.getInputStream());
        int ch;
        while((ch=isr.read())!=-1){
            sb.append((char)ch);
        }
        isr.close();
        return sb.toString();
    }
}

登陆操作：

正确的用户名和密码保存在文件中，先从文件中读取，再与输入的进行比较判断。

public class test {
    public static void main(String[] args) throws IOException {
      BufferedReader br=new BufferedReader(new FileReader("src\\a.txt"));
      String line=br.readLine();
      br.close();
      String[] userInfo=line.split("&");
      String[] arr1=userInfo[0].split("=");
      String[] arr2=userInfo[1].split("=");
      String rightusername=arr1[1];
      String rightpassword=arr2[1];

      Scanner sc=new Scanner(System.in);
        System.out.println("请输入用户名：");
        sc.nextLine();
        String username=sc.nextLine();
        System.out.println("请输入密码：");
        String password=sc.nextLine();
        if(rightusername.equals(username)&&rightpassword.equals(password)){
            System.out.println("登陆成功");
        }else{
            System.out.println("登陆失败");
        }

    }
}