From 85dee231a94a34c35deb33fb9425efb6e8783a79 Mon Sep 17 00:00:00 2001
From: User_cyk <1020691186@qq.com>
Date: Sun, 2 Jul 2023 10:22:43 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=94=B9=E8=BF=94=E5=9B=9E=E6=A0=87?=
 =?UTF-8?q?=E7=AD=BE=E7=9A=84=E6=96=B9=E5=BC=8F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/com/hellogithub/dao/categoryDao.java      |  44 ++++++++
 .../hellogithub/service/categoryService.java  |  16 +++
 .../hellogithub/service/projectService.java   | 105 ++++--------------
 .../hellogithub/servlet/retLabelServlet.java  |  62 +++++++++++
 4 files changed, 142 insertions(+), 85 deletions(-)
 create mode 100644 src/com/hellogithub/dao/categoryDao.java
 create mode 100644 src/com/hellogithub/service/categoryService.java
 create mode 100644 src/com/hellogithub/servlet/retLabelServlet.java

diff --git a/src/com/hellogithub/dao/categoryDao.java b/src/com/hellogithub/dao/categoryDao.java
new file mode 100644
index 0000000..192960b
--- /dev/null
+++ b/src/com/hellogithub/dao/categoryDao.java
@@ -0,0 +1,44 @@
+package com.hellogithub.dao;
+
+import com.hellogithub.entity.categoryEntity;
+import com.hellogithub.entity.projectEntity;
+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 java.sql.Connection;
+import java.sql.SQLException;
+import java.util.List;
+
+public class categoryDao {
+
+    //返回所有标签
+    public List<categoryEntity> retLabel() {
+        List<categoryEntity> categoryEntity;
+        try {
+            Connection conn = JdbcUtils.getConnection();
+            QueryRunner runner = new QueryRunner();
+            String sql = "select * from category ";
+            categoryEntity = runner.query(conn, sql, new BeanListHandler<>(categoryEntity.class));
+            conn.close();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return categoryEntity;
+    }
+    //发送Id找中文名字
+    public categoryEntity  retNum(int id ) {
+        categoryEntity categoryEntity;
+        try {
+            Connection conn = JdbcUtils.getConnection();
+            QueryRunner runner = new QueryRunner();
+            String sql = "select * from category where categoryId=?";
+            categoryEntity = runner.query(conn, sql, new BeanHandler<>(categoryEntity.class),id);
+            conn.close();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return categoryEntity;
+    }
+}
diff --git a/src/com/hellogithub/service/categoryService.java b/src/com/hellogithub/service/categoryService.java
new file mode 100644
index 0000000..5d7dd7f
--- /dev/null
+++ b/src/com/hellogithub/service/categoryService.java
@@ -0,0 +1,16 @@
+package com.hellogithub.service;
+
+import com.hellogithub.dao.projectDao;
+import com.hellogithub.dao.categoryDao;
+import com.hellogithub.entity.categoryEntity;
+
+import java.util.List;
+
+public class categoryService {
+
+    private categoryDao categoryDao = new categoryDao();
+
+    public List<categoryEntity> retLabel() {return categoryDao.retLabel();}
+
+    public categoryEntity  retNum(int id ){return categoryDao.retNum(id);}
+}
diff --git a/src/com/hellogithub/service/projectService.java b/src/com/hellogithub/service/projectService.java
index 844455c..a08c6bf 100644
--- a/src/com/hellogithub/service/projectService.java
+++ b/src/com/hellogithub/service/projectService.java
@@ -1,47 +1,30 @@
 package com.hellogithub.service;
 
-import com.hellogithub.dao.UserDao;
-import com.hellogithub.dao.projectDao;
-import com.hellogithub.entity.projectEntity;
 
-import java.util.HashMap;
-import java.util.Iterator;
+import com.hellogithub.dao.categoryDao;
+import com.hellogithub.dao.projectDao;
+import com.hellogithub.entity.categoryEntity;
+import com.hellogithub.entity.projectEntity;
 import java.util.List;
-import java.util.Map;
+
 
 public class projectService {
 
 
     private projectDao projectDao = new projectDao();
+    private categoryDao categoryDao = new categoryDao();
     /**
      * 按照期刊号查询
      *
      * @param num
      */
     public List<projectEntity> retTerm(String num){
-        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.retTerm(num);
         for(int i =0;i<projectEntityList.size();i++)
         {
             projectEntity projectEntity = projectEntityList.get(i);
-            projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
+            categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
+            projectEntity.setCategoryName(categoryEntity.getCategory());
 
         }
         return projectDao.retTerm(num);
@@ -70,31 +53,14 @@ public class projectService {
     }
 
     public List<projectEntity> retLatestProject(int cate) {
-        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;
         if (cate == 0) {
             projectEntityList =projectDao.retLatestProject();
             for(int i =0;i<projectEntityList.size();i++)
             {
                 projectEntity projectEntity = projectEntityList.get(i);
-                projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
+                categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
+                projectEntity.setCategoryName(categoryEntity.getCategory());
 
             }
         } else {
@@ -102,7 +68,8 @@ public class projectService {
             for(int i =0;i<projectEntityList.size();i++)
             {
                 projectEntity projectEntity = projectEntityList.get(i);
-                projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
+                categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
+                projectEntity.setCategoryName(categoryEntity.getCategory());
 
             }
 
@@ -110,24 +77,7 @@ public class projectService {
         return projectEntityList;
     }
     public List<projectEntity> retSelcetByStar(int cate){
-        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;
 
         if (cate == 0){
@@ -136,7 +86,8 @@ public class projectService {
             {
 
                 projectEntity projectEntity = projectEntityList.get(i);
-                projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
+                categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
+                projectEntity.setCategoryName(categoryEntity.getCategory());
 
             }
         }else {
@@ -146,37 +97,21 @@ public class projectService {
             {
 
                 projectEntity projectEntity = projectEntityList.get(i);
-                projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
-
+                categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
+                projectEntity.setCategoryName(categoryEntity.getCategory());
             }
         }
         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()));
+            categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
+            projectEntity.setCategoryName(categoryEntity.getCategory());
 
         }
         return projectEntityList;
diff --git a/src/com/hellogithub/servlet/retLabelServlet.java b/src/com/hellogithub/servlet/retLabelServlet.java
new file mode 100644
index 0000000..16143b4
--- /dev/null
+++ b/src/com/hellogithub/servlet/retLabelServlet.java
@@ -0,0 +1,62 @@
+package com.hellogithub.servlet;
+
+import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.service.categoryService;
+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;
+
+public class retLabelServlet extends HttpServlet {
+    private  categoryService categoryService=new categoryService();
+    @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 jsonString = JSONObject.toJSONString(categoryService.retLabel());
+        setResultOK("success",writer);
+        writer.println(jsonString);
+        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);
+    }
+}