点赞排序

src/com/hellogithub/dao/commentDao.java

@@ -32,7 +32,7 @@ public class commentDao {
         try {
             Connection conn = JdbcUtils.getConnection();
             QueryRunner runner = new QueryRunner();
-            String sql = "INSERT INTO comment (userId,projectId,content,isUsed,commentTime,isValid,star) VALUES (?,?,?,?,?,1,?)";
+            String sql = "INSERT INTO comment (userId,projectId,content,isUsed,commentTime,isValid,star,likeNum) VALUES (?,?,?,?,?,1,?,0)";
             num = runner.update(conn, sql,userid,projectId,content,isUsed,commentTime,star);
             conn.close();
         } catch (SQLException e) {
@@ -55,4 +55,20 @@ public class commentDao {
         }
         return commentEntityList;
     }
+
+    public List<commentEntity> selectByTrait(String id,String trait)
+    {
+        List<commentEntity> commentEntityList ;
+        try {
+            Connection conn = JdbcUtils.getConnection();
+            QueryRunner runner = new QueryRunner();
+            String sql = "select * from comment where projectId = ? and isValid = 1 Order BY ?";
+            commentEntityList = runner.query(conn, sql,new BeanListHandler<>(commentEntity.class),id,trait);
+            conn.close();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return commentEntityList;
+    }
+
 }

src/com/hellogithub/entity/commentEntity.java

@@ -75,4 +75,14 @@ public class commentEntity {
     public void setStar(int star) {
         this.star = star;
     }
+
+    int likeCount;
+
+    public int getLikeCount() {
+        return likeCount;
+    }
+
+    public void setLikeCount(int likeCount) {
+        this.likeCount = likeCount;
+    }
 }

src/com/hellogithub/service/commentService.java

@@ -48,4 +48,19 @@ public class commentService {
         List<commentEntity> commentEntityList = commentDao.selectByUserId(id);
         return JSONObject.toJSONString(commentEntityList);
     }
+
+    public String  selectByTrait(String id,String trait)
+    {
+        List<commentEntity> commentEntityList = commentDao.selectByTrait(id,trait);
+        if(trait.equals("last"))
+        {
+            commentEntityList = commentDao.selectByTrait(id,"creatTime");
+        }
+        if(trait.equals("hot"))
+        {
+            commentEntityList = commentDao.selectByTrait(id,"likeNum");
+        }
+
+        return JSONObject.toJSONString(commentEntityList);
+    }
 }

src/com/hellogithub/servlet/selectCommentByServlet.java

@@ -0,0 +1,48 @@
+package com.hellogithub.servlet;
+
+import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.service.commentService;
+import jakarta.servlet.ServletConfig;
+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;
+
+@WebServlet("/selectCommentBy")
+public class selectCommentByServlet extends HttpServlet {
+    private commentService commentService = new commentService();
+    @Override
+    public void init(ServletConfig config) throws ServletException {
+
+    }
+
+    @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");
+        resp.setContentType("text/html; charset=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");
+
+
+        String id = req.getParameter("id");
+        String trait = req.getParameter("trait");
+        PrintWriter writer = resp.getWriter();
+        writer.println(commentService.selectByTrait(id,trait));
+        writer.close();
+    }
+}