管理员登陆时间

src/com/hellogithub/dao/AdminDao.java

@@ -253,4 +253,26 @@ public class AdminDao {
         }
         return num;
     }
+
+    public String ret_logintime(String adminame){
+        String time = null;
+        String sql="SELECT loginTime FROM `admin` WHERE adminName = ?;";
+        PreparedStatement prep = null;
+        Connection conn = null;
+        ResultSet rs =null;
+        try{
+            conn = JdbcUtils.getConnection();
+            prep = conn.prepareStatement(sql);
+            prep.setString(1, adminame);
+            rs = prep.executeQuery();
+            while(rs.next()){
+                time = rs.getString(1);
+            }
+            JdbcUtils.closeConnection(prep, conn);
+            return time;
+        }catch(Exception e){
+            e.printStackTrace();
+        }
+        return time;
+    }
 }

src/com/hellogithub/service/AdminService.java

@@ -42,4 +42,6 @@ public class AdminService {
     public int updateAdminDetail(int adminId , int isValid , String   adminName, String adminPassword,String loginTime )
     { return adminDao.updateAdminDetail(adminId,isValid,adminName,adminPassword,loginTime);
     }
+
+    public String ret_logintime(String adminame){return adminDao.ret_logintime(adminame);}
 }

src/com/hellogithub/servlet/systemAdmin/ret_Logintime.java

@@ -0,0 +1,43 @@
+package com.hellogithub.servlet.systemAdmin;
+
+import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.service.AdminService;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import javax.servlet.annotation.WebServlet;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.random.RandomGenerator;
+
+@WebServlet("/retlogintime")
+public class ret_Logintime extends HttpServlet {
+
+    private AdminService adminService = new AdminService();
+    @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 adminame = req.getParameter("adminName");
+        String logintime = JSONObject.toJSONString(adminService.ret_logintime(adminame));
+        writer.println(logintime);
+        writer.close();
+    }
+}