增加点赞功能

src/com/hellogithub/service/projectService.java

@@ -14,7 +14,7 @@ import java.util.*;
 public class projectService {
 
 
-    private static projectDao projectDao = new projectDao();
+    private  projectDao projectDao = new projectDao();
     private categoryDao categoryDao = new categoryDao();
     /**
      * 按照期刊号查询

src/com/hellogithub/service/supportService.java

@@ -1,14 +1,15 @@
 package com.hellogithub.service;
 
+import com.hellogithub.dao.UserDao;
 import com.hellogithub.dao.supportDao;
 import com.hellogithub.entity.supportEntity;
 
-public class supprotService {
+public class supportService {
     private supportDao supportDao = new supportDao();
-
+    private UserDao userDao = new UserDao();
-    public int retNum(int userId,int projectId){
+    public int retNum(String username,int projectId){
         int num ;
-        supportEntity supportEntity = supportDao.selectSupport(userId,projectId);
+        supportEntity supportEntity = supportDao.selectSupport(userDao.selectIdByName(username),projectId);
         if(supportEntity == null)
         {
            num =0;
@@ -19,10 +20,10 @@ public class supprotService {
         return num ;
     }
 
-    public String  insertSupport(int userId , int projectId)
+    public String  insertSupport(String username, int projectId)
     {
         String tip;
-        int num = supportDao.insertSupport(userId,projectId);
+        int num = supportDao.insertSupport(userDao.selectIdByName(username),projectId);
         if(num == 1)
         {
             tip="点赞成功";
@@ -33,16 +34,16 @@ public class supprotService {
        return tip;
     }
 
-    public String  deleteSupport(int userId , int projectId)
+    public String  deleteSupport(String username, int projectId)
     {
         String tip;
-        int num = supportDao.deleteSupport(userId,projectId);
+        int num = supportDao.deleteSupport(userDao.selectIdByName(username),projectId);
         if(num == 1)
         {
-            tip="删除成功";
+            tip="取消成功";
         }
         else{
-            tip="删除失败";
+            tip="取消失败";
         }
         return tip;
     }

src/com/hellogithub/servlet/whetherAddLikeServlet.java

@@ -0,0 +1,72 @@
+package com.hellogithub.servlet;
+
+import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.entity.userEntity;
+import com.hellogithub.service.supportService;
+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 jakarta.servlet.http.HttpSession;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.HashMap;
+
+@WebServlet("/whetherAddLike")
+public class whetherAddLikeServlet extends HttpServlet {
+    private com.hellogithub.service.supportService supportService = new supportService();
+    @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");
+        PrintWriter writer = resp.getWriter();
+        String proId  = req.getParameter("proId");
+        HttpSession session = req.getSession();
+        userEntity userEntity= null;
+        userEntity=(userEntity)session.getAttribute("user");
+        if(userEntity == null){
+            setResultError("用户未登录，无法点赞",writer);
+        }else{
+            String tip = supportService.insertSupport(userEntity.getUserName(),Integer.parseInt(proId));
+            writer.println(tip);
+        }
+    }
+
+    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/whetherCancelLikeServlet.java

@@ -0,0 +1,74 @@
+package com.hellogithub.servlet;
+
+import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.entity.userEntity;
+import com.hellogithub.service.supportService;
+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 jakarta.servlet.http.HttpSession;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.HashMap;
+
+@WebServlet("/whetherCancelLike")
+public class whetherCancelLikeServlet extends HttpServlet {
+    private com.hellogithub.service.supportService supportService = new supportService();
+    @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");
+        PrintWriter writer = resp.getWriter();
+        String proId  = req.getParameter("proId");
+        HttpSession session = req.getSession();
+        userEntity userEntity= null;
+        userEntity=(userEntity)session.getAttribute("user");
+        if(userEntity == null){
+            setResultError("用户未登录，无法点赞",writer);
+        }else{
+            String tip = supportService.deleteSupport(userEntity.getUserName(),Integer.parseInt(proId));
+            writer.println(tip);
+        }
+
+    }
+
+
+    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/whetherLikeServlet.java

@@ -0,0 +1,75 @@
+package com.hellogithub.servlet;
+
+import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.entity.userEntity;
+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 com.hellogithub.service.supportService;
+import jakarta.servlet.http.HttpSession;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.HashMap;
+
+@WebServlet("/whetherLike")
+public class whetherLikeServlet extends HttpServlet {
+    private supportService supportService = new supportService();
+    @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");
+        PrintWriter writer = resp.getWriter();
+        String proId  = req.getParameter("proId");
+        HttpSession session = req.getSession();
+        userEntity userEntity= null;
+        userEntity=(userEntity)session.getAttribute("user");
+        if(userEntity == null)
+        {
+            writer.println(0);
+        }
+        else{
+            int num = supportService.retNum(userEntity.getUserName(),Integer.parseInt(proId));
+            writer.println(num);
+        }
+       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);
+    }
+}