更新下一个大版本，基本上算是重写了一遍吧～

src/cqbot/item/Group.php

@@ -0,0 +1,105 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: jerry
+ * Date: 2018/5/2
+ * Time: 下午1:59
+ */
+
+class Group
+{
+    private $group_id;
+    private $group_name;
+    private $prefix;
+    private $members = [];
+
+    public function __construct($group_id, $info) {
+        $this->group_id = $group_id;
+        $this->group_name = $info["group_name"];
+        $this->prefix = $info["prefix"];
+        $member_list = $info["member"];
+        $this->members = [];
+        foreach ($member_list as $k => $v) {
+            $this->members[$v["user_id"]] = new GroupMember($v["user_id"], $this, $v);
+        }
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getGroupId() {
+        return $this->group_id;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getGroupName() {
+        return $this->group_name;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getPrefix() {
+        return $this->prefix;
+    }
+
+    /**
+     * @return array
+     */
+    public function getMembers(): array {
+        return $this->members;
+    }
+
+    /**
+     * @param $user_id
+     * @return GroupMember|null
+     */
+    public function getMember($user_id) {
+        return isset($this->members[$user_id]) ? $this->members[$user_id] : null;
+    }
+
+    /**
+     * @param mixed $group_name
+     */
+    public function setGroupName($group_name) {
+        $this->group_name = $group_name;
+    }
+
+    /**
+     * set自定义群称号的方法
+     * @param mixed $prefix
+     */
+    public function setPrefix($prefix) {
+        $this->prefix = $prefix;
+    }
+
+    /**
+     * set群成员的类
+     * @param array $members
+     */
+    public function setMembers(array $members) {
+        $this->members = $members;
+    }
+
+    /**
+     * set群成员的类
+     * @param $user_id
+     * @param GroupMember $member
+     */
+    public function setMember($user_id, GroupMember $member) {
+        $this->members[$user_id] = $member;
+    }
+
+    /**
+     * 更新群信息
+     * @param bool $with_members
+     */
+    public function updateData($with_members = false) {
+        CQUtil::sendAPI(["action" => "get_group_list"], ["update_group_info", $this->getGroupId()]);
+        if ($with_members) {
+            CQUtil::sendAPI(["action" => "get_group_member_list", "params" => ["group_id" => $this->getGroupId()]], ["update_group_member_list", strval($this->getGroupId())]);
+        }
+    }
+}