冲刺作业：个人作业---爬取

dao

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package dao;
 
import dbutil.DBUtil;
import work.Content;
import work.paqu;
 
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
 
public class Dao {
    private paqu pa=new paqu();
    public List<Content> addpaqu() throws Exception {
        List<Content> contents = pa.parseJD();
        Connection conn = DBUtil.getConn();
        PreparedStatement pstmt = null;
        int a=0;
 
        int i=0;
        boolean f = false;
        try {
            while(i!=250){
                String sql = "insert into paqu(id,title,author,booktitle,month,year) value(?,?,?,?,?,?)";
                pstmt = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
 
 
                    pstmt.setInt(1, contents.get(i).getId());
                    pstmt.setString(2, String.valueOf(contents.get(i).getTitle()));
                    pstmt.setString(3, String.valueOf(contents.get(i).getAuthor()));
                    pstmt.setString(4, String.valueOf(contents.get(i).getBooktitle()));
                    pstmt.setString(5, String.valueOf(contents.get(i).getMonth()));
                    pstmt.setString(6, String.valueOf(contents.get(i).getYear()));
 
                    a=pstmt.executeUpdate();
                    i++;
                }
 
        }
        catch(SQLException e) {
            e.printStackTrace();
        }
        finally {
            DBUtil.close(pstmt, conn);
        }
        return contents;
    }
 
    public static boolean delete(String id) {
        Connection con=DBUtil.getConn();
        PreparedStatement pstmt=null;
        boolean f=false;
        int a=0;
        try {
            String sql="delete from paqu where id=?";
            pstmt=con.prepareStatement(sql);
            pstmt.setString(1,id);
 
            a=pstmt.executeUpdate();
 
        }catch(SQLException e) {
            e.printStackTrace();
        }finally {
            DBUtil.close(pstmt, con);
        }
        if(a>0) {
            f=true;
        }
        return f;
    }
 
    public  List<Content> liulanall() {
 
        List<Content> contents=new ArrayList<>();
        Connection con=DBUtil.getConn();
        PreparedStatement pstmt=null;
        ResultSet rs=null;
 
        try {
            String sql="select * from paqu ";
            pstmt=con.prepareStatement(sql);
 
            rs=pstmt.executeQuery();
 
            while(rs.next()) {
                int id=rs.getInt("id");
                String title=rs.getString("title");
                String author=rs.getString("author");
                String booktitle=rs.getString("booktitle");
                String month=rs.getString("month");
                String year=rs.getString("year");
                Content conts=new Content(id,title,author,booktitle,month,year);
                contents.add(conts);
 
            }
        }catch(SQLException e) {
            e.printStackTrace();
        }finally {
            DBUtil.close(rs,pstmt, con);
        }
        return contents;
    }
 
    public List<Content> searchTitle(String title){
        List<Content> contents = new ArrayList<Content>();
        String sql="select * from paqu where title like ?";
        ResultSet rs = null;
        PreparedStatement pstmt=null;
        try{
            Connection conn = DBUtil.getConn();
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1,"%"+title+"%");
            rs=pstmt.executeQuery();
            while(rs.next()){
                Content cont=new Content(rs.getInt(1),
                        rs.getString(2),rs.getString(3),
                        rs.getString(4),rs.getString(5),rs.getString(6));
                contents.add(cont);
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return contents;
    }
 
    public List<Content> searchAuthor(String name) {
        List<Content> contents = new ArrayList<Content>();
        String sql="select * from paqu where author like ?";
        ResultSet rs = null;
        PreparedStatement pstmt=null;
        try{
            Connection conn = DBUtil.getConn();
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1,"%"+name+"%");
            rs=pstmt.executeQuery();
            while(rs.next()){
                Content cont=new Content(rs.getInt(1),
                        rs.getString(2),rs.getString(3),
                        rs.getString(4),rs.getString(5),rs.getString(6));
                contents.add(cont);
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return contents;
    }
 
    public boolean update(Content c,String old_title){//修改信息
        boolean f=false;
        int a=0;
        String sql = "update paqu set id='"+c.getId()+"',title='"+c.getTitle()+"',author='"+c.getAuthor()+"',booktitle='"+c.getBooktitle()+"',month='"+c.getMonth()+"',year='"+c.getYear()+"'where title='"+old_title+"'";
        try {
            Connection conn=DBUtil.getConn();
            PreparedStatement pstmt=conn.prepareStatement(sql);
            a=pstmt.executeUpdate();
            System.out.println(a);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        if(a>0) f=true;
 
        return f;
 
    }
    public Content selectinfor(String title) {//查询信息
        String sql="select * from paqu where title=?";
        Content c=new Content();
        try {
            ResultSet rs=null;
            Connection conn=DBUtil.getConn();
            PreparedStatement pstmt=conn.prepareStatement(sql);
            pstmt.setString(1,title);
            rs=pstmt.executeQuery();
            while(rs.next()) {
                c=new Content(rs.getInt(1),
                        rs.getString(2),rs.getString(3),
                        rs.getString(4),rs.getString(5),rs.getString(6));
            }
 
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return c ;
 
    }
    public static boolean add(Content contents) {
        Connection con=DBUtil.getConn();
        PreparedStatement pstmt=null;
        boolean f=false;
        int a=0;
        try {
            String sql="insert into paqu(id,title,author,booktitle,month,year) value(?,?,?,?,?,?)";
            pstmt=con.prepareStatement(sql);
            pstmt.setInt(1,contents.getId());
            pstmt.setString(2,contents.getTitle());
            pstmt.setString(3,contents.getAuthor());
            pstmt.setString(4,contents.getBooktitle());
            pstmt.setString(5,contents.getMonth());
            pstmt.setString(6,contents.getYear());
            a=pstmt.executeUpdate();
 
        }catch(SQLException e) {
            e.printStackTrace();
        }finally {
            DBUtil.close(pstmt, con);
        }
        if(a>0) {
            f=true;
        }
        return f;
    }
}

　　

dbutil

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package dbutil;
 
import java.sql.*;
 
/**
 * 数据库连接工具
 * @author Hu
 *
 */
public class DBUtil {
 
    public static String url =  "jdbc:mysql://localhost:3306/course?useUnicode=true&characterEncoding=GB18030&useSSL=false&serverTimezone=GMT&allowPublicKeyRetrieval=true";
    public static String user = "root";
    public static String password = "123456";
 
    public static Connection getConn () {
        Connection conn = null;
 
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");//加载驱动
            conn = DriverManager.getConnection(url, user, password);
        } catch (Exception e) {
            e.printStackTrace();
        }
 
        return conn;
    }
 
 
    public static void close (PreparedStatement preparedState, Connection conn) {
        if (preparedState != null) {
            try {
                preparedState.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
 
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
 
    public static void close (ResultSet rs, PreparedStatement preparedState, Connection conn) {
        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
 
        if (preparedState != null) {
            try {
                preparedState.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
 
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
 
    /**
     * 关闭连接
     * @param state
     * @param conn
     */
    public static void close (Statement state, Connection conn) {
        if (state != null) {
            try {
                state.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
 
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
 
    public static void close (ResultSet rs, Statement state, Connection conn) {
        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
 
        if (state != null) {
            try {
                state.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
 
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
 
    public static void main(String[] args) throws SQLException {
        Connection conn = getConn();
        PreparedStatement preparedStatement = null;
        ResultSet rs = null;
        String sql ="select * from xuanke";
        preparedStatement = conn.prepareStatement(sql);
        rs = preparedStatement.executeQuery();
        if(rs.next()){
            System.out.println("数据库为空");
        }
        else{
            System.out.println("数据库不为空");
        }
    }
}

　　

servlet

 

DeleteServlet

package servlet;

import dao.Dao;
import lombok.SneakyThrows;
import work.Content;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.List;
@WebServlet("/DeleteServlet")
public class DeleteServlet extends HttpServlet {
    @SneakyThrows
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, UnsupportedEncodingException {
        request.setCharacterEncoding("utf-8");
        Dao dao=new Dao();
        String method = request.getParameter("method");
        if(Dao.delete(method)) {
            response.sendRedirect("LiulanallServlet?method=liulanall");
        }else{
            response.getWriter().println("删除失败");
        }
    }
    @SneakyThrows
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }


}

LiulanallServlet

package servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import dao.Dao;
import work.Content;


@WebServlet("/LiulanallServlet")
public class LiulanallServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;



    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        Dao dao=new Dao();
        request.setCharacterEncoding("utf-8");
        String method = request.getParameter("method");
        if("liulanall".equals(method)) {
            List<Content> contents=dao.liulanall();

            request.setAttribute("contents",contents);
            request.getRequestDispatcher("index.jsp").forward(request, response);
        }

    }


    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

SelectServlet

package servlet;

import dao.Dao;
import lombok.SneakyThrows;
import work.Content;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.List;
@WebServlet("/SelectServlet")
public class SelectServlet extends HttpServlet {
    @SneakyThrows
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, UnsupportedEncodingException {
        request.setCharacterEncoding("utf-8");
        Dao dao=new Dao();
        String method = request.getParameter("method");
        String keyword= request.getParameter("keyword");
        String name = request.getParameter("name");
        System.out.println(name);
        if("search".equals(method)) {
            if(keyword!=null&&keyword!="") {
                System.out.println(keyword);
                List<Content> contents = dao.searchTitle(keyword);
                request.setAttribute("contents", contents);
                request.getRequestDispatcher("index.jsp").forward(request, response);
            }else if(name!=null&&name!=""){
               // System.out.println(name);
                List<Content> contents = dao.searchAuthor(name);
                request.setAttribute("contents", contents);
                request.getRequestDispatcher("index.jsp").forward(request, response);
            }
        }
    }
    @SneakyThrows
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }


}

Servlet

package servlet;

import dao.Dao;
import lombok.SneakyThrows;
import work.Content;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.List;
@WebServlet("/Servlet")
public class Servlet extends HttpServlet {
    @SneakyThrows
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, UnsupportedEncodingException {
        request.setCharacterEncoding("utf-8");
        Dao dao=new Dao();
        String method = request.getParameter("method");
        if("index".equals(method)) {
                List<Content> contents=dao.addpaqu();
                request.setAttribute("contents",contents);
                request.getRequestDispatcher("index.jsp").forward(request, response);
        }else if("add".equals(method)){
            String id=request.getParameter("id");
            String title=request.getParameter("title");
            String author=request.getParameter("author");
            String booktitle=request.getParameter("booktitle");
            String month=request.getParameter("month");
            String year=request.getParameter("year");

            Content contents=new Content(Integer.parseInt(id),title,author,booktitle,month,year);
            if(Dao.add(contents)) {
                System.out.println("添加成功");
                response.sendRedirect("LiulanallServlet?method=liulanall");
            }
        }
    }
    @SneakyThrows
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }


}

UpdateServlet

package servlet;

import dao.Dao;
import lombok.SneakyThrows;
import work.Content;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.List;
@WebServlet("/UpdateServlet")
public class UpdateServlet extends HttpServlet {
    @SneakyThrows
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, UnsupportedEncodingException {
        request.setCharacterEncoding("utf-8");
        Dao dao=new Dao();
        String method = request.getParameter("method");
         if("update".equals(method))
        {
            String id=request.getParameter("id");
            String title=request.getParameter("title");
            String author=request.getParameter("author");
            String booktitle=request.getParameter("booktitle");
            String month = request.getParameter("month");
            String year = request.getParameter("year");
            String old_title=request.getParameter("old_title");
            Content c=new Content(Integer.parseInt(id),title,author,booktitle,month,year);
            dao.update(c,old_title);
            request.setAttribute("message", "添加成功");
            response.sendRedirect("LiulanallServlet?method=liulanall");
        }else{
            String title=method;
            Content c=new Content();
            c.setTitle(title);
            c= dao.selectinfor(title);
            request.setAttribute("c", c);
            request.getRequestDispatcher("update.jsp").forward(request, response);
        }
    }
    @SneakyThrows
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }


}

work

Content

package work;

public class Content {
    private int id;
    private String title;
    private String author;
    private String booktitle;
    private String month;
    private String year;

    public Content(){}
    public Content(int id, String title, String author, String booktitle, String month, String year) {
        this.id = id;
        this.title = title;
        this.author = author;
        this.booktitle = booktitle;
        this.month = month;
        this.year = year;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

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

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public String getBooktitle() {
        return booktitle;
    }

    public void setBooktitle(String booktitle) {
        this.booktitle = booktitle;
    }

    public String getMonth() {
        return month;
    }

    public void setMonth(String month) {
        this.month = month;
    }

    public String getYear() {
        return year;
    }

    public void setYear(String year) {
        this.year = year;
    }


}paqu
package work;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;


import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

public class paqu {

        public  List<Content> parseJD() throws Exception {
            String url = "https://openaccess.thecvf.com/CVPR2020?day=2020-06-18";
            Document document = Jsoup.parse(new URL(url), 30000);
            Elements elements = document.getElementsByClass("bibref");
            List<Content> goodList = new ArrayList<>();
            int x=1,id=0;
            for (Element el : elements) {
                //String img = el.getElementsByTag("img").eq(0).attr("data-lazy-img");
               // String author = el.getElementsByClass("bibref").eq(0).text();

                String text = el.text();
                System.out.println(text);
                String[] arr = text.split("=");
                String author="",title="",booktitle="",month="",year="";
                id=x;
                for(int i=0;i<arr.length;i++){

                    if(arr[i].charAt(0)=='@') {
                    continue;
                    }
                    else {
                        switch (i) {
                            case 1: author = arr[i].substring(2, arr[i].indexOf("}"));break;
                            case 2: title = arr[i].substring(2, arr[i].indexOf("}"));break;
                            case 3: booktitle = arr[i].substring(2, arr[i].indexOf("}"));break;
                            case 4: month = arr[i].substring(2, arr[i].indexOf("}"));break;
                            case 5: year = arr[i].substring(2, arr[i].indexOf("}"));break;
                        }
                    }
                }
                Content content = new Content();
                content.setId(id);
                content.setAuthor(author);
                content.setTitle(title);
                content.setBooktitle(booktitle);
                content.setMonth(month);
                content.setYear(year);
                x++;


                //content.setAuthor(author);
                //content.setImg(img);
                goodList.add(content);
            }
            return goodList;

        }

}

webapp前端

add.jsp

<%--
  Created by IntelliJ IDEA.
  User: DELL
  Date: 2022/5/15
  Time: 9:00
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<form action="Servlet?method=add" method="post">
    <table>
        <tr>
            <td>
                请准备一个ID号：<input type="number" name="id" id="id">
            </td>
        </tr>
        <tr>
            <td>
                请输入标题：<input type="text" name="title" id="title">
            </td>
        </tr>
        <tr>
            <td>
                请输入作者姓名：<input type="text" name="author" id="author">
            </td>
        </tr>
        <tr>
            <td>
                请输入书签：<input type="text" name="booktitle" id="booktitle">
            </td>
        </tr>
        <tr>
            <td>
                请输入月份：<input type="text" name="month" id="month">
            </td>
        </tr>
        <tr>
            <td>
                请输入年份：<input type="text" name="year" id="year">
            </td>
        </tr>
        <tr>
            <td>
                <input type="submit" name="submit" value="提交">
            </td>
        </tr>
    </table>

</form>

</body>
</html>

index.jsp

<%--
  Created by IntelliJ IDEA.
  User: DELL
  Date: 2022/5/15
  Time: 9:00
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<form action="Servlet?method=add" method="post">
    <table>
        <tr>
            <td>
                请准备一个ID号：<input type="number" name="id" id="id">
            </td>
        </tr>
        <tr>
            <td>
                请输入标题：<input type="text" name="title" id="title">
            </td>
        </tr>
        <tr>
            <td>
                请输入作者姓名：<input type="text" name="author" id="author">
            </td>
        </tr>
        <tr>
            <td>
                请输入书签：<input type="text" name="booktitle" id="booktitle">
            </td>
        </tr>
        <tr>
            <td>
                请输入月份：<input type="text" name="month" id="month">
            </td>
        </tr>
        <tr>
            <td>
                请输入年份：<input type="text" name="year" id="year">
            </td>
        </tr>
        <tr>
            <td>
                <input type="submit" name="submit" value="提交">
            </td>
        </tr>
    </table>

</form>

</body>
</html>

update.jsp

<%@ page import="work.Content" %>
<%@ page import="java.util.List" %><%--
  Created by IntelliJ IDEA.
  User: DELL
  Date: 2022/5/15
  Time: 3:39
  To change this template use File | Settings | File Templates.
--%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>Title</title>
</head>
<body>
<%
   Content c=(Content) request.getAttribute("c");
%>
<form action="UpdateServlet?method=update" method="post">
    <input type="hidden" name="old_title" value="<%=c.getTitle()%>"/>
    序号:<input type="text" name="id" id="id" value="<%=c.getId()%>"><br>
    标题:<input type="text" name="title" id="title" value="<%=c.getTitle()%>"><br>
    作者：<input type="text" name="author" id="author" value="<%=c.getAuthor()%>"><br>
    书签:<input type="text" name="booktitle" id="booktitle" value="<%=c.getBooktitle()%>"><br>
    月份:<input type="text" name="month" id="month" value="<%=c.getMonth()%>"><br>
    年:<input type="text" name="year" id="year" value="<%=c.getYear()%>"><br>
    <input type="submit" value="修改">
</form>
</body>
</html>
posted @   stdrush  阅读(19)  评论(0)  编辑  收藏  举报
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