改bug

src/com/hellogithub/dao/UserDao.java

@@ -4,7 +4,6 @@ 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.*;
 
@@ -172,18 +171,21 @@ public class UserDao {
         return num;
     }
 
-    public Long retUserNum(){
+    /*
-        Long count;
+     *
+     * 返回用户总数
+     * */
+    public int  queryUserCount(){
+        int num;
         try {
             Connection conn = JdbcUtils.getConnection();
-            ScalarHandler handler=new ScalarHandler<Integer>();
             QueryRunner runner = new QueryRunner();
-            String sql = "select count(*) from user";
+            String sql="select count(*) from user";
-            count =(Long) runner.query( conn,sql,new ScalarHandler());
+            num = runner.query(conn,sql,new BeanHandler<>(Integer.class));
-            conn.close();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         }
-        return count;
+
+        return num;
     }
 }

src/com/hellogithub/dao/projectDao.java

@@ -5,11 +5,8 @@ import com.hellogithub.utils.JdbcUtils;
 import org.apache.commons.dbutils.QueryRunner;
 import org.apache.commons.dbutils.handlers.BeanHandler;
 import org.apache.commons.dbutils.handlers.BeanListHandler;
-import org.apache.commons.dbutils.handlers.ScalarHandler;
 
-import java.lang.ref.PhantomReference;
 import java.sql.Connection;
-import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.util.List;
 
@@ -53,17 +50,19 @@ public class projectDao {
         return projectEntity.getPeriodicals();
     }
     /**
-     * 返回最所有项目总数
+     * 返回所有项目总数
      *
      *
      */
     public int countAll() {
         int count;
+        projectEntity p;
         try {
             Connection conn = JdbcUtils.getConnection();
             QueryRunner runner = new QueryRunner();
-            String sql = "select count(1) from project";
+            String sql = "select count(*) as projectId from project";
-            count  = runner.query(conn, sql, new BeanHandler<>(Integer.class));
+            p  = runner.query(conn, sql, new BeanHandler<>(projectEntity.class));
+            count = p.getProjectId();
             conn.close();
         } catch (SQLException e) {
             throw new RuntimeException(e);
@@ -96,16 +95,12 @@ public class projectDao {
             QueryRunner runner = new QueryRunner();
             String sql = "select * from project;";
             projectEntityList = runner.query(conn, sql, new BeanListHandler<>(projectEntity.class));
+            conn.close();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         }
         return projectEntityList;
     }
-    /**
-     * 按照分类检索项目
-     *
-     *
-     */
     public List<projectEntity> retSelcetByCate(int cateid){
         List<projectEntity> projectEntityList;
         try {
@@ -113,47 +108,65 @@ public class projectDao {
             QueryRunner runner = new QueryRunner();
             String sql = "select * from project where projectId in (select projectId from project_category where categoryId=?)";
             projectEntityList = runner.query(conn, sql, new BeanListHandler<>(projectEntity.class),cateid);
+            conn.close();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         }
         return projectEntityList;
     }
-    /**
+
-     * 按照分类检索最热门项目
-     *
-     *
-     */
     public List<projectEntity> retSelcetByStartNum(int cateid){
         List<projectEntity> projectEntityList;
         try {
             Connection conn = JdbcUtils.getConnection();
             QueryRunner runner = new QueryRunner();
-            String sql = "select * from project where projectId in (select projectId from project_category where categoryId=?) order by startNum";
+            String sql = "select * from project where projectId in (select projectId from project_category where categoryId=?) order by lookCount desc";
             projectEntityList = runner.query(conn, sql, new BeanListHandler<>(projectEntity.class),cateid);
+            conn.close();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         }
         return projectEntityList;
     }
-    /**
+    public List<projectEntity> retMostStar( ){
-     * 检索所有最热门的项目
-     *
-     *
-     */
-    public List<projectEntity> retMostStar(){
         List<projectEntity> projectEntityList;
         try {
             Connection conn = JdbcUtils.getConnection();
             QueryRunner runner = new QueryRunner();
-            String sql = "select * from project order by startNum desc";
+            String sql = "select * from project order by lookCount desc";
             projectEntityList = runner.query(conn, sql, new BeanListHandler<>(projectEntity.class));
+            conn.close();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         }
         return projectEntityList;
     }
-
+    //搜索框
-
+    public List<projectEntity> selectByInput(String str) {
-
+        List<projectEntity> projectEntityList;
-
+        try {
+            Connection conn = JdbcUtils.getConnection();
+            QueryRunner runner = new QueryRunner();
+            String sql = "SELECT * FROM project WHERE projectName LIKE %?%";
+            projectEntityList = runner.query(conn, sql, new BeanListHandler<>(projectEntity.class), str);
+            conn.close();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return projectEntityList;
+    }
+    //返回标签
+//    public List<> retLabelBy(String str) {
+//        List<projectEntity> projectEntityList;
+//        try {
+//            Connection conn = JdbcUtils.getConnection();
+//            QueryRunner runner = new QueryRunner();
+//            String sql = "SELECT * FROM project WHERE projectName LIKE %?%";
+//            projectEntityList = runner.query(conn, sql, new BeanListHandler<>(projectEntity.class), str);
+//            conn.close();
+//        } catch (SQLException e) {
+//            throw new RuntimeException(e);
+//        }
+//        return ;
+//    }
 }

src/com/hellogithub/service/UserService.java

@@ -47,10 +47,5 @@ public class UserService {
      * @param name
      * */
     public int  dedleteAllLabel(String name){return userDao.dedleteAllLabel(name);}
-    /**
+    public int queryUserCount(){return userDao.queryUserCount();}
-     * 查询用户表中的用户总数
-     * */
-    public Long retUserNums(){return userDao.retUserNum();}
-
-
 }

src/com/hellogithub/service/projectService.java

@@ -4,8 +4,10 @@ import com.hellogithub.dao.UserDao;
 import com.hellogithub.dao.projectDao;
 import com.hellogithub.entity.projectEntity;
 
-import java.sql.Array;
+import java.util.HashMap;
-import java.util.*;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
 
 public class projectService {
 
@@ -39,7 +41,7 @@ public class projectService {
         for(int i =0;i<projectEntityList.size();i++)
         {
             projectEntity projectEntity = projectEntityList.get(i);
-            projectEntity.setCategoryName(dataMap.get(projectEntity.getProjectId()));
+            projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
 
         }
         return projectDao.retTerm(num);
@@ -92,7 +94,7 @@ public class projectService {
             for(int i =0;i<projectEntityList.size();i++)
             {
                 projectEntity projectEntity = projectEntityList.get(i);
-                projectEntity.setCategoryName(dataMap.get(projectEntity.getProjectId()));
+                projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
 
             }
         } else {
@@ -100,24 +102,83 @@ public class projectService {
             for(int i =0;i<projectEntityList.size();i++)
             {
                 projectEntity projectEntity = projectEntityList.get(i);
-                projectEntity.setCategoryName(dataMap.get(projectEntity.getProjectId()));
+                projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
 
             }
 
         }
         return projectEntityList;
     }
-    /**
-     * 返回根据标签查询最热门的项目
-     * */
     public List<projectEntity> retSelcetByStar(int cate){
-        if (cate==0){
+        Map<Integer,String> dataMap=new HashMap<>();
-            return projectDao.retMostStar();
+        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;
+
+        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 {
-            return projectDao.retSelcetByStartNum(cate);
+            projectEntityList =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

@@ -0,0 +1,73 @@
+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("cate");
+        String cate = req.getParameter("num");
         PrintWriter writer = resp.getWriter();
         String jsonString = JSONObject.toJSONString(projectService.retLatestProject(Integer.valueOf(cate)));
         writer.println(jsonString);

src/com/hellogithub/servlet/selectMostStarServlet.java

@@ -11,11 +11,7 @@ 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();
@@ -42,7 +38,8 @@ 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("cate");
+        String cate = req.getParameter("num");
+
         PrintWriter writer = resp.getWriter();
         String jsonString = JSONObject.toJSONString(projectService.retSelcetByStar(Integer.valueOf(cate)));
         writer.println(jsonString);

src/com/hellogithub/servlet/userNumServlet.java

@@ -1,31 +1,27 @@
 package com.hellogithub.servlet;
 
 import com.alibaba.fastjson.JSONObject;
-import com.hellogithub.dao.UserDao;
+import com.hellogithub.service.UserService;
 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;
-/**
+import java.util.HashMap;
- * 返回数据库中用户的总人数
+
- * */
-@WebServlet("/userNum")
 public class userNumServlet extends HttpServlet {
-    UserDao userDao = new UserDao();
+    private UserService userService = new UserService();
     @Override
     public void init(ServletConfig config) throws ServletException {
-        super.init(config);
+
     }
 
     @Override
     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
-
+        doPost(req, resp);
-        doPost(req,resp);
     }
 
     @Override
@@ -42,14 +38,33 @@ public class userNumServlet extends HttpServlet {
         resp.setContentType("application/json;charset=UTF-8");
 
         PrintWriter writer = resp.getWriter();
-        String  str= "num:"+ userDao.retUserNum();
+        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();
     }
 
-    @Override
+    public void setResultError(String msg, PrintWriter writer) {
-    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        setResult(500, msg, writer);
-        super.service(req, resp);
+    }
+
+    public void setResultOK(String msg, PrintWriter writer) {
+        setResult(200, msg, writer);
     }
 }

web/index.jsp

@@ -11,6 +11,7 @@
     <title>$Title$</title>
   </head>
   <body>
-  $END$
+  你说的对，但是hellogithub是一个....
+  <a></a>
   </body>
 </html>