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Merge branch 'dev' into main
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‎221801121&221801131/README.md

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# 顶会热词统计
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## 作业链接
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## 结对学号
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221801121&221801131
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## 项目介绍
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我们的项目是一个顶会热词统计网站，包含查询顶会论文、删除论文、三大顶会的热词词频分析展示、10大热词词云图等功能。
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项目已部署至阿里云上，地址：http://116.62.208.168:8080/demo_war
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## 构建运行
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* 所需环境
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Tomcat
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* 具体步骤
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下载文件，将其解压
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将解压后的文件置入Tomcat服务目录下,重启tomcat
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打开浏览器，进入localhost:8080/即可进入

‎221801121&221801131/codestyle.md

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#### 包命名
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包名称必须全部用小写。
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命名方式：com.业务领域名.业务模块.业务子模块.系统分层
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如com.hcepms.proj.ownerunit.dao
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com.hcepms.proj.ownerunit.controller
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#### 类命名
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类名以英文单词取名，首字母必须大写，多个英文单词以大写字母间隔，避免使用单词的 缩写，除非它的缩写已经广为人知，如HTTP。类名中不允许‘_’、‘-’等符号。
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#### 常量命名
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所有常量名均全部大写，单词间以‘_’隔开。例如：MAX_NUM
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#### 异常处理
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在当前的系统架构中，系统自上而下被分为控制器层、业务逻辑层、数据访问层、数据持久层、界面层。本规范约定各层的异常处理机制。
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异常处理原则：
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1、下层有常异，必须抛向上一层。
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2、为了使系统能够更好的跟踪运行情况，必须把底层异常放入新异常中。
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3、如果一个层要抛出多个异常，那么所有自定义异常必须统一继承一个父类异常。这样上层可以通过父类异常捕获。
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4、异常统一在控制器层处理，控制器层以下的层次在处理异常时，只需要把低层的异常类放到本层约定的异常类中，并抛出，如有需要可以加适当的异常消息。
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#### 对于业务逻辑复杂方法的处理约定
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如果一个方法业务逻辑比较复杂，在一个方法中进行处理，该方法将会臃肿、不宜阅读和维护，建议每个方法代码行不要大于50行，建议多使用方法重构。建议对方法中需要进行说明的地方进行注释，如参数、方法中多个步骤的业务逻辑处理。（备注，代码行数指的是代码语句行数，不是编辑器行数）
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#### 缩进
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- 四个空格
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***
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#### 命名
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***
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#### 空行
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- 每个函数定义结束后，相对独立的程序块之间必须加空行。
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- 括号使用：单独一行
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```
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for(;;)
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{
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XXX；
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}
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```
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‎221801121&221801131/java/edu/fzu/postsearch/dao/PostDAO.java

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int getTotal();
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void add(Post post);
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void update(Post post);
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void delete(String title) ;
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void delete(int id) ;
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Post get(String title);
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List<Post> list();
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public List<Post> listSearch(String search);
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List<Post> list(int start, int count) ;
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boolean isExist(String name) ;
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}

‎221801121&221801131/java/edu/fzu/postsearch/dao/PostDAOimpl.java

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}
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@Override
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public void delete(String title) {
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public void delete(int id) {
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try (Connection c = DBUtil.getConnection(); Statement s = c.createStatement()) {
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String sql = "delete from post where id = '" + id + "'";
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s.executeUpdate(sql);
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} catch (SQLException e) {
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e.printStackTrace();
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}
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}
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@Override
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public Post get(String title) {
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return null;
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public List<Post> list() {
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List<Post> postList = new ArrayList<>();
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try (Connection c = DBUtil.getConnection(); Statement s = c.createStatement()) {
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String sql = "select * from post";
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String sql = "select * from post order by year desc,type";
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ResultSet rs = s.executeQuery(sql);
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while (rs.next()){
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int id = rs.getInt("id");
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String title = rs.getString("title");
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String keywords = rs.getString("keywords");
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String abs = rs.getString("abstract");
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String link = rs.getString("link");
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String year = rs.getString("year");
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String type = rs.getString("type");
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List<String> kwds= Arrays.asList(keywords.split(","));
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postList.add(new Post(id,title,kwds,abs,link,year,type));
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}
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}catch (SQLException e) {
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e.printStackTrace();
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}
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return postList;
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}
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public List<Post> listSearch(String search) {
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List<Post> postList = new ArrayList<>();
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try (Connection c = DBUtil.getConnection(); Statement s = c.createStatement()) {
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String sql = "select * from post where title like \'%%" + search +"%%\'" + "or keywords like \'%%" + search +"%%\'order by year desc,type";
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ResultSet rs = s.executeQuery(sql);
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while (rs.next()){
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int id = rs.getInt("id");
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String title = rs.getString("title");
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String keywords = rs.getString("keywords");
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String abs = rs.getString("abstract");
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String link = rs.getString("link");
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String year = rs.getString("year");
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String type = rs.getString("type");
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List<String> kwds= Arrays.asList(keywords.split(","));
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postList.add(new Post(title,kwds,abs,link,year,type));
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postList.add(new Post(id,title,kwds,abs,link,year,type));
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}
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}catch (SQLException e) {
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e.printStackTrace();

‎221801121&221801131/java/edu/fzu/postsearch/pojo/Post.java

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import java.util.List;
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public class Post {
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private int id;
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private String title;
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private List<String> kwds;
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private String abs;
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private String link;
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private String year;
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private String type;
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public Post(String title,List<String> kwds,String abs,String link,String year,String type){
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public Post(int id,String title,List<String> kwds,String abs,String link,String year,String type){
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this.id = id;
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this.title = title;
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this.kwds = kwds;
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this.abs = abs;
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this.type = type;
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}
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public int getId() {
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return id;
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}
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public void setId(int id) {
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this.id = id;
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}
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public String getTitle() {
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return title;
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}

‎221801121&221801131/java/edu/fzu/postsearch/servlet/BaseBackServlet.java

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package edu.fzu.postsearch.servlet;
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import jakarta.servlet.http.HttpServlet;
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import jakarta.servlet.http.HttpServletRequest;
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import jakarta.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.lang.reflect.Method;
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‎221801121&221801131/java/edu/fzu/postsearch/servlet/DeleteServlet.java

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package edu.fzu.postsearch.servlet;
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import edu.fzu.postsearch.dao.PostDAO;
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import edu.fzu.postsearch.dao.PostDAOimpl;
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import javax.servlet.*;
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import javax.servlet.http.*;
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import javax.servlet.annotation.*;
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import java.io.IOException;
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@WebServlet(name = "DeleteServlet", value = "/DeleteServlet")
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public class DeleteServlet extends HttpServlet {
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private PostDAO postDAO = new PostDAOimpl();
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@Override
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protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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int id = Integer.parseInt(req.getParameter("id"));
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String search = req.getParameter("search");
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postDAO.delete(id);
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req.getRequestDispatcher("/postList?search="+search).forward(req, resp);
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}
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@Override
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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}
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@Override
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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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}
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}

‎221801121&221801131/java/edu/fzu/postsearch/servlet/PostServlet.java

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package edu.fzu.postsearch.servlet;
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import edu.fzu.postsearch.dao.PostDAOimpl;
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import edu.fzu.postsearch.pojo.Post;
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import edu.fzu.postsearch.dao.PostDAO;
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import edu.fzu.postsearch.dao.PostDAOimpl;
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import jakarta.servlet.ServletException;
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import jakarta.servlet.ServletRequest;
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import jakarta.servlet.ServletResponse;
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import jakarta.servlet.annotation.WebServlet;
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import jakarta.servlet.http.HttpServlet;
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import jakarta.servlet.http.HttpServletRequest;
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import jakarta.servlet.http.HttpServletResponse;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.util.List;
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@WebServlet("/postList")
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public class PostServlet extends BaseBackServlet{
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private PostDAO postDAO;
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@Override
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public void service(ServletRequest req, ServletResponse resp) throws ServletException, IOException {
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List posts = (List) req.getAttribute("posts");// 取得共享里面的数据
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public void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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List<Post> posts = (List<Post>) req.getAttribute("posts");// 取得共享里面的数据
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if (posts == null){
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String search = req.getParameter("search");
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req.setAttribute("search",search);
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postDAO = new PostDAOimpl();
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posts = postDAO.list();
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if(search.equals(""))posts = postDAO.list();
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else posts = postDAO.listSearch(search);
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}
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//List<Post> posts = postDAO.list();
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// 接收分页页面传递过来的页面数
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String strNum = req.getParameter("pageNum");
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int pageNum = 0;// 表示当前要显示的页面数
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int maxPage = 0;// 最大页
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int pageCount = posts.size();// 得到查询出来的所有数据的数目
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// 如果是第一次执行,就会接收不到数据
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if (strNum == null) {
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strNum = "0";
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} else {// 接收到了用户点击的第几(pageNum)页
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pageNum = Integer.parseInt(strNum);
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}
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// 计算出要分多少页
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if (pageCount % 4 == 0) {
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maxPage = pageCount / 4;
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if (pageCount % 31 == 0) {
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maxPage = pageCount / 31;
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} else {
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maxPage = pageCount / 4 + 1;
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maxPage = pageCount / 31 + 1;
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}
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//System.out.println(posts.get(0).getTitle());
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req.setAttribute("maxPage", maxPage);// 存储最大页数
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req.setAttribute("pageNum", pageNum);// 将当前页面存储起来,给分页页面使用
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req.setAttribute("posts", posts);

‎221801121&221801131/java/edu/fzu/postsearch/util/DBUtil.java

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package edu.fzu.postsearch.util;
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import edu.fzu.postsearch.dao.PostDAO;
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import edu.fzu.postsearch.dao.PostDAOimpl;
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import edu.fzu.postsearch.pojo.Post;
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import java.sql.*;
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import java.util.List;
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public class DBUtil {
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static String loginName = "root";
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static String password = "root";
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public static void main(String[] args) throws SQLException {
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System.out.println(getConnection());
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PostDAO postDAO = new PostDAOimpl();
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List<Post> posts = postDAO.listSearch("");
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System.out.println(posts.get(0).getTitle());
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}
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}

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