添加文章类相关代码

src/com/hellogithub/dao/articleDao.java

@@ -0,0 +1,94 @@
+package com.hellogithub.dao;
+
+import com.hellogithub.entity.articleEntity;
+import com.hellogithub.entity.projectEntity;
+import com.hellogithub.entity.userEntity;
+import com.hellogithub.utils.JdbcUtils;
+import org.apache.commons.dbutils.QueryRunner;
+import org.apache.commons.dbutils.ResultSetHandler;
+import org.apache.commons.dbutils.handlers.BeanListHandler;
+
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class articleDao {
+    private articleEntity articleEntity = new articleEntity();
+
+    /**
+     按照最新排序文章
+     */
+    public List<articleEntity> ArticleSortBylast(){
+        Connection conn = null;
+        PreparedStatement preparedStatement = null;
+        ResultSet rs = null;
+        String sql = "SELECT * FROM `article` ORDER BY publishTime DESC;";
+        ArrayList<com.hellogithub.entity.articleEntity> articleEntities = new ArrayList<articleEntity>();
+        try {
+            conn = JdbcUtils.getConnection();
+            preparedStatement = conn.prepareStatement(sql);
+            rs = preparedStatement.executeQuery();
+            while (rs.next()) {
+                int articleid = rs.getInt(1);
+                int userid = rs.getInt(2);
+                String articlecontent = rs.getString(3);
+                String datetime = rs.getString(4);
+                int isvalid = rs.getInt(5);
+                int readcount = rs.getInt(6);
+                articleEntity entity = new articleEntity(articleid, userid, articlecontent, datetime, isvalid, readcount);
+                articleEntities.add(entity);
+            }
+            return articleEntities;
+        }catch(Exception e){
+            e.printStackTrace();
+        }finally{
+            try{
+                conn.close();
+                preparedStatement.close();
+                rs.close();
+            }catch(Exception e) {
+                e.printStackTrace();
+            }
+        }return articleEntities;
+    }
+
+    /**
+     * 按浏览量最多排序文章
+     * @return
+     */
+    public List<articleEntity> ArticleSortByhot(){
+        Connection conn = null;
+        PreparedStatement preparedStatement = null;
+        ResultSet rs = null;
+        String sql = "SELECT * FROM `article` ORDER BY readCount DESC";
+        ArrayList<com.hellogithub.entity.articleEntity> articleEntities = new ArrayList<articleEntity>();
+        try {
+            conn = JdbcUtils.getConnection();
+            preparedStatement = conn.prepareStatement(sql);
+            rs = preparedStatement.executeQuery();
+            while (rs.next()) {
+                int articleid = rs.getInt(1);
+                int userid = rs.getInt(2);
+                String articlecontent = rs.getString(3);
+                String datetime = rs.getString(4);
+                int isvalid = rs.getInt(5);
+                int readcount = rs.getInt(6);
+                articleEntity entity = new articleEntity(articleid, userid, articlecontent, datetime, isvalid, readcount);
+                articleEntities.add(entity);
+            }
+            return articleEntities;
+        }catch(Exception e){
+            e.printStackTrace();
+        }finally{
+            try{
+                conn.close();
+                preparedStatement.close();
+                rs.close();
+            }catch(Exception e) {
+                e.printStackTrace();
+            }
+        }return articleEntities;
+    }
+}

src/com/hellogithub/entity/articleEntity.java

@@ -1,11 +1,28 @@
 package com.hellogithub.entity;
 
 public class articleEntity {
+    public articleEntity(){}  //无参构造函数
+    public articleEntity(int articleId,int userId,String articleContent,String publishTime,int isValid,int readCount){
+        this.articleId = articleId;
+        this.userId = userId;
+        this.articleContent = articleContent;
+        this.publishTime = publishTime;
+        this.isValid = isValid;
+        this.readCount = readCount;
+    }
 
     int articleId;
 
     int userId;
 
+    String articleContent;
+
+    String publishTime;
+    int isValid;
+
+    int readCount;
+
+
     public int getArticleId() {
         return articleId;
     }
@@ -46,9 +63,7 @@ public class articleEntity {
         this.isValid = isValid;
     }
 
-    String articleContent;
+    public int getReadCount(){return readCount;}
-
-    String publishTime;
-    int isValid;
 
+    public void setReadCount(int readCount){this.readCount = readCount;}
 }

src/com/hellogithub/service/articleService.java

@@ -0,0 +1,23 @@
+package com.hellogithub.service;
+
+import com.hellogithub.dao.articleDao;
+import com.hellogithub.entity.articleEntity;
+
+
+import java.util.List;
+
+public class articleService {
+    public articleService(){
+
+    }
+
+    public List<articleEntity> ArticleSortBylast(){
+        articleDao articleDao = new articleDao();
+        return articleDao.ArticleSortBylast();
+    }
+
+    public List<articleEntity> ArticleSortByhot(){
+        articleDao articleDao = new articleDao();
+        return articleDao.ArticleSortByhot();
+    }
+}

src/com/hellogithub/servlet/article/articleSortServlet.java

@@ -0,0 +1,69 @@
+package com.hellogithub.servlet.article;
+
+import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.entity.articleEntity;
+import com.hellogithub.service.articleService;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.lang.reflect.Array;
+import java.util.HashMap;
+import java.util.List;
+
+
+/**
+ * 最新时间排序文章
+ */
+@WebServlet("/articleSort")
+public class articleSortServlet extends HttpServlet {
+    protected articleService articleservice = new articleService();
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        doPost(req, resp);
+    }
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+
+        resp.setCharacterEncoding("UTF-8");
+        //        设置响应头允许ajax跨域访问
+        String curOrigin = req.getHeader("Origin");
+        resp.setHeader("Access-Control-Allow-Origin", curOrigin == null ? "true" : curOrigin);
+        resp.setHeader("Access-Control-Allow-Credentials", "true");
+        resp.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, HEAD");
+        resp.setHeader("Access-Control-Max-Age", "3600");
+        resp.setHeader("Access-Control-Allow-Headers", "access-control-allow-origin, authority, content-type, version-info, X-Requested-With");
+        resp.setContentType("application/json;charset=UTF-8");
+
+//        传入参数?sort_by = last 或者?sort_by = hot  默认是last界面
+        PrintWriter writer = resp.getWriter();
+        List<articleEntity> articleEntityListLast = articleservice.ArticleSortBylast();
+        List<articleEntity> articleEntityListHot = articleservice.ArticleSortByhot();
+        String sortby = req.getParameter("sort_by");
+        String jsonString1 = JSONObject.toJSONString(articleEntityListLast);
+        String jsonString2 = JSONObject.toJSONString(articleEntityListHot);
+        if ("last".equals(sortby)) {
+            writer.println(jsonString1);
+        }else if("hot".equals(sortby)){
+            writer.println(jsonString2);
+        }else{
+            setResultError("false", writer);
+        }
+        writer.close();
+    }
+    public void setResult(Integer code, String msg, PrintWriter writer) {
+        HashMap<String, Object> result = new HashMap<>();
+        result.put("code", code);
+        result.put("msg", msg);
+        String jsonString = JSONObject.toJSONString(result);
+        writer.println(jsonString);
+        writer.close();
+    }
+    public void setResultError(String msg, PrintWriter writer) {
+        setResult(500, msg, writer);
+    }
+}