根据标签查询最新的项目和最热门的项目，默认标签为0时查询全部项目。

src/com/hellogithub/dao/UserDao.java

@@ -4,6 +4,7 @@ import com.hellogithub.entity.userEntity;
 import com.hellogithub.utils.JdbcUtils;
 import org.apache.commons.dbutils.QueryRunner;
 import org.apache.commons.dbutils.handlers.BeanHandler;
+import org.apache.commons.dbutils.handlers.ScalarHandler;
 
 import java.sql.*;
 
@@ -171,24 +172,6 @@ public class UserDao {
         return num;
     }
 
-    /*
-     *
-     * 返回用户总数
-     * */
-    public int  queryUserCount(){
-        int num;
-        try {
-            Connection conn = JdbcUtils.getConnection();
-            QueryRunner runner = new QueryRunner();
-            String sql="select count(*) from user";
-            num = runner.query(conn,sql,new BeanHandler<>(Integer.class));
-        } catch (SQLException e) {
-            throw new RuntimeException(e);
-        }
-
-        return num;
-    }
-
     public Long retUserNum(){
         Long count;
         try {

src/com/hellogithub/dao/projectDao.java

@@ -153,4 +153,7 @@ public class projectDao {
         return projectEntityList;
     }
 
+
+
+
 }

src/com/hellogithub/service/projectService.java

@@ -4,10 +4,8 @@ import com.hellogithub.dao.UserDao;
 import com.hellogithub.dao.projectDao;
 import com.hellogithub.entity.projectEntity;
 
-import java.util.HashMap;
+import java.sql.Array;
-import java.util.Iterator;
+import java.util.*;
-import java.util.List;
-import java.util.Map;
 
 public class projectService {
 
@@ -109,76 +107,17 @@ public class projectService {
         }
         return projectEntityList;
     }
+    /**
+     * 返回根据标签查询最热门的项目
+     * */
     public List<projectEntity> retSelcetByStar(int cate){
-        Map<Integer,String> dataMap=new HashMap<>();
+        if (cate==0){
-        dataMap.put(1,"C项目");
+            return projectDao.retMostStar();
-        dataMap.put(2,"C#项目");
-        dataMap.put(3,"C++项目");
-        dataMap.put(4,"CSS项目");
-        dataMap.put(5,"Go项目");
-        dataMap.put(6,"Java项目");
-        dataMap.put(7,"Javascript项目");
-        dataMap.put(8,"Kotlin项目");
-        dataMap.put(9,"Obejctive-C项目");
-        dataMap.put(10,"PHP项目");
-        dataMap.put(11,"Python项目");
-        dataMap.put(12,"Ruby项目");
-        dataMap.put(13,"Rust项目");
-        dataMap.put(14,"Swift项目");
-        dataMap.put(15,"其他");
-        dataMap.put(16,"开源书籍");
-        dataMap.put(17,"机器学习");
-        List<projectEntity> projectEntityList;
-
-        if (cate == 0){
-            projectEntityList =projectDao.retMostStar();
-            for(int i =0;i<projectEntityList.size();i++)
-            {
-
-                projectEntity projectEntity = projectEntityList.get(i);
-                projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
-
-            }
         }else {
-            projectEntityList =projectDao.retSelcetByStartNum(cate);
+            return projectDao.retSelcetByStartNum(cate);
-
-            for(int i =0;i<projectEntityList.size();i++)
-            {
-
-                projectEntity projectEntity = projectEntityList.get(i);
-                projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
-
-            }
         }
-        return projectEntityList;
     }
 
-    public List<projectEntity> selectByInput(String str){
-        Map<Integer,String> dataMap=new HashMap<>();
-        dataMap.put(1,"C项目");
-        dataMap.put(2,"C#项目");
-        dataMap.put(3,"C++项目");
-        dataMap.put(4,"CSS项目");
-        dataMap.put(5,"Go项目");
-        dataMap.put(6,"Java项目");
-        dataMap.put(7,"Javascript项目");
-        dataMap.put(8,"Kotlin项目");
-        dataMap.put(9,"Obejctive-C项目");
-        dataMap.put(10,"PHP项目");
-        dataMap.put(11,"Python项目");
-        dataMap.put(12,"Ruby项目");
-        dataMap.put(13,"Rust项目");
-        dataMap.put(14,"Swift项目");
-        dataMap.put(15,"其他");
-        dataMap.put(16,"开源书籍");
-        dataMap.put(17,"机器学习");
-        List<projectEntity> projectEntityList = projectDao.selectByInput(str);
-        for(int i =0;i<projectEntityList.size();i++)
-        {
-            projectEntity projectEntity = projectEntityList.get(i);
-            projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
 
-        }
+
-        return projectEntityList;
-    }
 }

src/com/hellogithub/servlet/selectByInputServlet.java

@@ -1,73 +0,0 @@
-package com.hellogithub.servlet;
-
-import com.alibaba.fastjson.JSONObject;
-import com.hellogithub.entity.projectEntity;
-import com.hellogithub.service.projectService;
-import jakarta.servlet.ServletConfig;
-import jakarta.servlet.ServletException;
-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.util.HashMap;
-import java.util.List;
-
-public class selectByInputServlet extends HttpServlet {
-    private com.hellogithub.service.projectService projectService=new projectService();
-    @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");
-        //返回最新期刊数字
-        PrintWriter writer = resp.getWriter();
-        String str = req.getParameter("xxxxx");
-        List<projectEntity> projectEntityList = projectService.selectByInput(str);
-        if(projectEntityList.size() == 0 ){
-            setResultError("查询结果为空",writer);
-        }
-        else{
-            String jsonString = JSONObject.toJSONString(projectEntityList);
-            setResultOK("success",writer);
-            writer.println(jsonString);
-            writer.close();
-            setResultOK("success",writer);
-        }
-
-    }
-    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);
-    }
-
-    public void setResultOK(String msg, PrintWriter writer) {
-        setResult(200, msg, writer);
-    }
-}

src/com/hellogithub/servlet/selectLastByCateServlet.java

@@ -42,7 +42,7 @@ public class selectLastByCateServlet extends HttpServlet {
         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 cate = req.getParameter("num");
+        String cate = req.getParameter("cate");
         PrintWriter writer = resp.getWriter();
         String jsonString = JSONObject.toJSONString(projectService.retLatestProject(Integer.valueOf(cate)));
         writer.println(jsonString);

src/com/hellogithub/servlet/selectMostStarServlet.java

@@ -11,7 +11,11 @@ import jakarta.servlet.http.HttpServletResponse;
 
 import java.io.IOException;
 import java.io.PrintWriter;
-
+/**
+ * 根据标签查询最热门的项目
+ *
+ *
+ */
 @WebServlet("/selectMostStar")
 public class selectMostStarServlet extends HttpServlet {
     private projectService projectService=new projectService();
@@ -38,8 +42,7 @@ public class selectMostStarServlet extends HttpServlet {
         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 cate = req.getParameter("num");
+        String cate = req.getParameter("cate");
-
         PrintWriter writer = resp.getWriter();
         String jsonString = JSONObject.toJSONString(projectService.retSelcetByStar(Integer.valueOf(cate)));
         writer.println(jsonString);

src/com/hellogithub/servlet/userNumServlet.java

@@ -5,9 +5,6 @@ import com.hellogithub.dao.UserDao;
 import jakarta.servlet.ServletConfig;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.annotation.WebServlet;
-import com.hellogithub.service.UserService;
-import jakarta.servlet.ServletConfig;
-import jakarta.servlet.ServletException;
 import jakarta.servlet.http.HttpServlet;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
@@ -23,20 +20,12 @@ public class userNumServlet extends HttpServlet {
     @Override
     public void init(ServletConfig config) throws ServletException {
         super.init(config);
-import java.util.HashMap;
-
-public class userNumServlet extends HttpServlet {
-    private UserService userService = new UserService();
-    @Override
-    public void init(ServletConfig config) throws ServletException {
-
     }
 
     @Override
     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 
         doPost(req,resp);
-        doPost(req, resp);
     }
 
     @Override
@@ -62,33 +51,5 @@ public class userNumServlet extends HttpServlet {
     @Override
     protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
         super.service(req, resp);
-        int num = userService.queryUserCount();
-        String  str= "num:"+num ;
-        String jsonString = JSONObject.toJSONString(str);
-        writer.println(jsonString);
-        if(num == 0)
-        {
-            setResultError("用户总数为空",writer);
-        }else{
-            setResultOK("success",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);
-    }
-
-    public void setResultOK(String msg, PrintWriter writer) {
-        setResult(200, msg, writer);
     }
 }

src/config.properties

@@ -1,4 +1,4 @@
 driverClass=com.mysql.cj.jdbc.Driver
 url=jdbc:mysql://127.0.0.1:3306/hellogithub?serverTimezone=GMT%2B8
 user=root
-password=1611
+password=123456