修改

zxdt-api/src/main/java/api/controller/online/MessageController.java

 package api.controller.online;
 
+import api.controller.BaseController;
+import api.entity.database.online.Message;
 import api.entity.database.system.Customer;
+import api.entity.input.PageInput;
 import api.entity.input.online.MessageInput;
+import api.model.AjaxResult;
+import api.service.online.IMessageService;
 import api.service.system.ICustomerService;
 import api.service.websocket.WebSocket;
-import api.util.annotation.Anonymous;
+import api.util.annotation.Log;
+import api.util.enums.BusinessType;
 import api.util.helper.AsyncHelper;
 import api.util.helper.DateHelper;
 import api.util.helper.FileUploadHelper;
-import com.alibaba.fastjson2.JSON;
+import api.util.helper.StringHelper;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
-import api.controller.BaseController;
-import api.entity.database.online.Message;
-import api.entity.input.PageInput;
-import api.model.AjaxResult;
-import api.service.online.IMessageService;
-import api.util.annotation.Log;
-import api.util.enums.BusinessType;
-import api.util.helper.StringHelper;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.multipart.MultipartFile;
 
 import javax.annotation.Resource;
-import java.io.IOException;
+import java.text.SimpleDateFormat;
 import java.util.*;
 import java.util.stream.Collectors;
 
             }
         }
 
+        Collections.sort(list, new Comparator() {
+            SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+            @Override
+            public int compare(Object o1, Object o2) {
+                try {
+
+                    Date dt1 = sf.parse( ((Map) o1).get("time").toString());
+                    Date dt2 = sf.parse( ((Map) o2).get("time").toString());
+                    if (dt1.getTime() > dt2.getTime()) {
+                        return -1;
+                    } else if (dt1.getTime() < dt2.getTime()) {
+                        return 1;
+                    } else {
+                        return 0;
+                    }
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+                return 0;
+            }
+        });
+
         return Success("成功", list);
     }