diff --git a/src/main/java/com/zsc/edu/gateway/common/enums/EnableState.java b/src/main/java/com/zsc/edu/gateway/common/enums/EnableState.java
new file mode 100644
index 0000000..06c6151
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/common/enums/EnableState.java
@@ -0,0 +1,23 @@
+package com.zsc.edu.gateway.common.enums;
+
+import com.baomidou.mybatisplus.annotation.IEnum;
+
+public enum EnableState implements IEnum<Boolean> {
+    ENABLE(Boolean.TRUE),
+    DISABLE(Boolean.FALSE);
+
+    private boolean value;
+
+    EnableState(Boolean value) {
+        this.value = value;
+    }
+
+    @Override
+    public Boolean getValue() {
+        return this.value;
+    }
+
+    public EnableState reverse() {
+        return this == ENABLE ? DISABLE : ENABLE;
+    }
+}
diff --git a/src/main/java/com/zsc/edu/gateway/common/enums/IState.java b/src/main/java/com/zsc/edu/gateway/common/enums/IState.java
new file mode 100644
index 0000000..7d63a58
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/common/enums/IState.java
@@ -0,0 +1,36 @@
+package com.zsc.edu.gateway.common.enums;
+
+
+import com.zsc.edu.gateway.exception.StateException;
+
+import java.util.EnumSet;
+
+/**
+ * @author harry_yao
+ */
+public interface IState<T extends Enum<T>> {
+
+    /**
+     * 用于检查对象当前状态是否等于correctStatus
+     *
+     * @param correctState 正确状态
+     */
+    default void checkStatus(T correctState) {
+        if (this != correctState) {
+            throw new StateException(correctState.getClass(), this, correctState);
+        }
+    }
+
+    /**
+     * 用于检查对象当前状态是否在集合correctStates中
+     *
+     * @param correctStates 正确状态集合
+     */
+    @SuppressWarnings("SuspiciousMethodCalls")
+    default void checkStatus(EnumSet<T> correctStates) {
+        if (!correctStates.contains(this)) {
+            throw new StateException(this.getClass(), this, correctStates);
+        }
+    }
+
+}
diff --git a/src/main/java/com/zsc/edu/gateway/common/mapstruct/BaseMapper.java b/src/main/java/com/zsc/edu/gateway/common/mapstruct/BaseMapper.java
new file mode 100644
index 0000000..e7109e6
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/common/mapstruct/BaseMapper.java
@@ -0,0 +1,23 @@
+package com.zsc.edu.gateway.common.mapstruct;
+
+import org.mapstruct.MappingTarget;
+
+import java.util.List;
+
+public interface BaseMapper<D, E> {
+    D toDto(E entity);
+
+    E toEntity(D dto);
+
+    List<D> toDto(List<E> entityList);
+
+    List<E> toEntity(List<D> dtoList);
+
+    /**
+     * 更新实体类
+     *
+     * @param dto
+     * @param entity
+     */
+    void convert(D dto, @MappingTarget E entity);
+}
diff --git a/src/main/java/com/zsc/edu/gateway/common/util/TreeUtil.java b/src/main/java/com/zsc/edu/gateway/common/util/TreeUtil.java
new file mode 100644
index 0000000..312f984
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/common/util/TreeUtil.java
@@ -0,0 +1,130 @@
+package com.zsc.edu.gateway.common.util;
+
+import java.util.*;
+import java.util.function.*;
+import java.util.stream.Collectors;
+import java.util.function.BiConsumer;
+import java.util.function.BiFunction;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+/**
+ * @Description: 树操作方法工具类
+ * @Copyright: Copyright (c) 赵侠客
+ * @Date: 2024-07-22 10:42
+ * @Version: 1.0
+ */
+public class TreeUtil {
+
+    /**
+     * 将list合成树
+     *
+     * @param list           需要合成树的List
+     * @param rootCheck      判断E中为根节点的条件，如：x->x.getPId()==-1L , x->x.getParentId()==null,x->x.getParentMenuId()==0
+     * @param parentCheck    判断E中为父节点条件，如：(x,y)->x.getId().equals(y.getPId())
+     * @param setSubChildren E中设置下级数据方法，如：Menu::setSubMenus
+     * @param <E>            泛型实体对象
+     * @return 合成好的树
+     */
+    public static <E> List<E> makeTree(List<E> list, Predicate<E> rootCheck, BiFunction<E, E, Boolean> parentCheck, BiConsumer<E, List<E>> setSubChildren) {
+        return list.stream().filter(rootCheck).peek(x -> setSubChildren.accept(x, makeChildren(x, list, parentCheck, setSubChildren))).collect(Collectors.toList());
+    }
+
+    /**
+     * 将树打平成tree
+     *
+     * @param tree           需要打平的树
+     * @param getSubChildren 设置下级数据方法，如：Menu::getSubMenus,x->x.setSubMenus(null)
+     * @param setSubChildren 将下级数据置空方法，如：x->x.setSubMenus(null)
+     * @param <E>            泛型实体对象
+     * @return 打平后的数据
+     */
+    public static <E> List<E> flat(List<E> tree, Function<E, List<E>> getSubChildren, Consumer<E> setSubChildren) {
+        List<E> res = new ArrayList<>();
+        forPostOrder(tree, item -> {
+            setSubChildren.accept(item);
+            res.add(item);
+        }, getSubChildren);
+        return res;
+    }
+
+    /**
+     * 前序遍历
+     *
+     * @param tree           需要遍历的树
+     * @param consumer       遍历后对单个元素的处理方法，如：x-> System.out.println(x)、 System.out::println打印元素
+     * @param setSubChildren 设置下级数据方法，如：Menu::getSubMenus,x->x.setSubMenus(null)
+     * @param <E>            泛型实体对象
+     */
+    public static <E> void forPreOrder(List<E> tree, Consumer<E> consumer, Function<E, List<E>> setSubChildren) {
+        for (E l : tree) {
+            consumer.accept(l);
+            List<E> es = setSubChildren.apply(l);
+            if (es != null && es.size() > 0) {
+                forPreOrder(es, consumer, setSubChildren);
+            }
+        }
+    }
+
+    /**
+     * 层序遍历
+     *
+     * @param tree           需要遍历的树
+     * @param consumer       遍历后对单个元素的处理方法，如：x-> System.out.println(x)、 System.out::println打印元素
+     * @param setSubChildren 设置下级数据方法，如：Menu::getSubMenus,x->x.setSubMenus(null)
+     * @param <E>            泛型实体对象
+     */
+    public static <E> void forLevelOrder(List<E> tree, Consumer<E> consumer, Function<E, List<E>> setSubChildren) {
+        Queue<E> queue = new LinkedList<>(tree);
+        while (!queue.isEmpty()) {
+            E item = queue.poll();
+            consumer.accept(item);
+            List<E> childList = setSubChildren.apply(item);
+            if (childList != null && !childList.isEmpty()) {
+                queue.addAll(childList);
+            }
+        }
+    }
+
+    /**
+     * 后序遍历
+     *
+     * @param tree           需要遍历的树
+     * @param consumer       遍历后对单个元素的处理方法，如：x-> System.out.println(x)、 System.out::println打印元素
+     * @param setSubChildren 设置下级数据方法，如：Menu::getSubMenus,x->x.setSubMenus(null)
+     * @param <E>            泛型实体对象
+     */
+    public static <E> void forPostOrder(List<E> tree, Consumer<E> consumer, Function<E, List<E>> setSubChildren) {
+        for (E item : tree) {
+            List<E> childList = setSubChildren.apply(item);
+            if (childList != null && !childList.isEmpty()) {
+                forPostOrder(childList, consumer, setSubChildren);
+            }
+            consumer.accept(item);
+        }
+    }
+
+    /**
+     * 对树所有子节点按comparator排序
+     *
+     * @param tree        需要排序的树
+     * @param comparator  排序规则Comparator，如：Comparator.comparing(MenuVo::getRank)按Rank正序 ,(x,y)->y.getRank().compareTo(x.getRank())，按Rank倒序
+     * @param getChildren 获取下级数据方法，如：MenuVo::getSubMenus
+     * @param <E>         泛型实体对象
+     * @return 排序好的树
+     */
+    public static <E> List<E> sort(List<E> tree, Comparator<? super E> comparator, Function<E, List<E>> getChildren) {
+        for (E item : tree) {
+            List<E> childList = getChildren.apply(item);
+            if (childList != null && !childList.isEmpty()) {
+                sort(childList, comparator, getChildren);
+            }
+        }
+        tree.sort(comparator);
+        return tree;
+    }
+
+    private static <E> List<E> makeChildren(E parent, List<E> allData, BiFunction<E, E, Boolean> parentCheck, BiConsumer<E, List<E>> children) {
+        return allData.stream().filter(x -> parentCheck.apply(parent, x)).peek(x -> children.accept(x, makeChildren(x, allData, parentCheck, children))).collect(Collectors.toList());
+    }
+}
diff --git a/src/main/java/com/zsc/edu/gateway/framework/DeptTreeUtil.java b/src/main/java/com/zsc/edu/gateway/framework/DeptTreeUtil.java
new file mode 100644
index 0000000..544aaef
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/framework/DeptTreeUtil.java
@@ -0,0 +1,69 @@
+package com.zsc.edu.gateway.framework;
+
+import com.zsc.edu.gateway.modules.system.entity.Dept;
+import com.zsc.edu.gateway.modules.system.entity.User;
+import com.zsc.edu.gateway.modules.system.vo.DeptTree;
+import com.zsc.edu.gateway.modules.system.vo.UserTree;
+import org.springframework.stereotype.Component;
+
+import java.util.*;
+import java.util.function.BiConsumer;
+import java.util.function.BiFunction;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+/**
+ * @author zhuang
+ */
+@Component
+public class DeptTreeUtil {
+
+    public static <E> List<E> makeTree(List<E> list, Predicate<E> rootCheck, BiFunction<E, E, Boolean> parentCheck, BiConsumer<E, List<E>> setSubChildren) {
+        return list.stream()
+                .filter(rootCheck)
+                .peek(x -> setSubChildren.accept(x, makeChildren(x, list, parentCheck, setSubChildren)))
+                .collect(Collectors.toList());
+    }
+
+    private static <E> List<E> makeChildren(E parent, List<E> allData, BiFunction<E, E, Boolean> parentCheck, BiConsumer<E, List<E>> setSubChildren) {
+        return allData.stream()
+                .filter(x -> parentCheck.apply(parent, x))
+                .peek(x -> setSubChildren.accept(x, makeChildren(x, allData, parentCheck, setSubChildren)))
+                .collect(Collectors.toList());
+    }
+
+    public static List<DeptTree> buildDeptTree(List<Dept> depots, Map<Long, List<User>> userMap) {
+        List<DeptTree> deptTrees = depots.stream()
+                .map(DeptTreeUtil::convertToDeptTree)
+                .collect(Collectors.toList());
+
+        deptTrees.forEach(deptTree -> {
+            List<User> users = userMap.getOrDefault(deptTree.getId(), Collections.emptyList());
+            deptTree.setMembers(users.stream()
+                    .map(DeptTreeUtil::convertToUserTree)
+                    .collect(Collectors.toList()));
+        });
+
+        return makeTree(
+                deptTrees,
+                deptTree -> deptTree.getPid() == null || deptTree.getPid() == 0L,
+                (parent, child) -> parent.getId().equals(child.getPid()),
+                DeptTree::setChildren
+        );
+    }
+
+    private static DeptTree convertToDeptTree(Dept dept) {
+        DeptTree deptTree = new DeptTree();
+        deptTree.setId(dept.getId());
+        deptTree.setPid(dept.getPid());
+        deptTree.setName(dept.getName());
+        return deptTree;
+    }
+
+    private static UserTree convertToUserTree(User user) {
+        UserTree userTree = new UserTree();
+        userTree.setId(user.getId());
+        userTree.setName(user.getName());
+        return userTree;
+    }
+}
diff --git a/src/main/java/com/zsc/edu/gateway/framework/JsonExceptionUtil.java b/src/main/java/com/zsc/edu/gateway/framework/JsonExceptionUtil.java
new file mode 100644
index 0000000..2bb5042
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/framework/JsonExceptionUtil.java
@@ -0,0 +1,21 @@
+package com.zsc.edu.gateway.framework;
+
+import org.springframework.http.HttpStatus;
+
+import java.util.Calendar;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+/**
+ * @author harry yao
+ */
+public class JsonExceptionUtil {
+    public static Map<String, Object> jsonExceptionResult(HttpStatus code, String message, String path) {
+        Map<String, Object> exceptionMap = new LinkedHashMap<>();
+        exceptionMap.put("timestamp", Calendar.getInstance().getTime());
+        exceptionMap.put("message", message);
+        exceptionMap.put("path", path);
+        exceptionMap.put("code", code.value());
+        return exceptionMap;
+    }
+}
diff --git a/src/main/java/com/zsc/edu/gateway/framework/TreeUtil.java b/src/main/java/com/zsc/edu/gateway/framework/TreeUtil.java
new file mode 100644
index 0000000..2fb31cb
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/framework/TreeUtil.java
@@ -0,0 +1,130 @@
+package com.zsc.edu.gateway.framework;
+
+import java.util.*;
+import java.util.function.*;
+import java.util.stream.Collectors;
+import java.util.function.BiConsumer;
+import java.util.function.BiFunction;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+/**
+ * @Description: 树操作方法工具类
+ * @Copyright: Copyright (c) 赵侠客
+ * @Date: 2024-07-22 10:42
+ * @Version: 1.0
+ */
+public class TreeUtil {
+
+    /**
+     * 将list合成树
+     *
+     * @param list           需要合成树的List
+     * @param rootCheck      判断E中为根节点的条件，如：x->x.getPId()==-1L , x->x.getParentId()==null,x->x.getParentMenuId()==0
+     * @param parentCheck    判断E中为父节点条件，如：(x,y)->x.getId().equals(y.getPId())
+     * @param setSubChildren E中设置下级数据方法，如：Menu::setSubMenus
+     * @param <E>            泛型实体对象
+     * @return 合成好的树
+     */
+    public static <E> List<E> makeTree(List<E> list, Predicate<E> rootCheck, BiFunction<E, E, Boolean> parentCheck, BiConsumer<E, List<E>> setSubChildren) {
+        return list.stream().filter(rootCheck).peek(x -> setSubChildren.accept(x, makeChildren(x, list, parentCheck, setSubChildren))).collect(Collectors.toList());
+    }
+
+    /**
+     * 将树打平成tree
+     *
+     * @param tree           需要打平的树
+     * @param getSubChildren 设置下级数据方法，如：Menu::getSubMenus,x->x.setSubMenus(null)
+     * @param setSubChildren 将下级数据置空方法，如：x->x.setSubMenus(null)
+     * @param <E>            泛型实体对象
+     * @return 打平后的数据
+     */
+    public static <E> List<E> flat(List<E> tree, Function<E, List<E>> getSubChildren, Consumer<E> setSubChildren) {
+        List<E> res = new ArrayList<>();
+        forPostOrder(tree, item -> {
+            setSubChildren.accept(item);
+            res.add(item);
+        }, getSubChildren);
+        return res;
+    }
+
+    /**
+     * 前序遍历
+     *
+     * @param tree           需要遍历的树
+     * @param consumer       遍历后对单个元素的处理方法，如：x-> System.out.println(x)、 System.out::println打印元素
+     * @param setSubChildren 设置下级数据方法，如：Menu::getSubMenus,x->x.setSubMenus(null)
+     * @param <E>            泛型实体对象
+     */
+    public static <E> void forPreOrder(List<E> tree, Consumer<E> consumer, Function<E, List<E>> setSubChildren) {
+        for (E l : tree) {
+            consumer.accept(l);
+            List<E> es = setSubChildren.apply(l);
+            if (es != null && es.size() > 0) {
+                forPreOrder(es, consumer, setSubChildren);
+            }
+        }
+    }
+
+    /**
+     * 层序遍历
+     *
+     * @param tree           需要遍历的树
+     * @param consumer       遍历后对单个元素的处理方法，如：x-> System.out.println(x)、 System.out::println打印元素
+     * @param setSubChildren 设置下级数据方法，如：Menu::getSubMenus,x->x.setSubMenus(null)
+     * @param <E>            泛型实体对象
+     */
+    public static <E> void forLevelOrder(List<E> tree, Consumer<E> consumer, Function<E, List<E>> setSubChildren) {
+        Queue<E> queue = new LinkedList<>(tree);
+        while (!queue.isEmpty()) {
+            E item = queue.poll();
+            consumer.accept(item);
+            List<E> childList = setSubChildren.apply(item);
+            if (childList != null && !childList.isEmpty()) {
+                queue.addAll(childList);
+            }
+        }
+    }
+
+    /**
+     * 后序遍历
+     *
+     * @param tree           需要遍历的树
+     * @param consumer       遍历后对单个元素的处理方法，如：x-> System.out.println(x)、 System.out::println打印元素
+     * @param setSubChildren 设置下级数据方法，如：Menu::getSubMenus,x->x.setSubMenus(null)
+     * @param <E>            泛型实体对象
+     */
+    public static <E> void forPostOrder(List<E> tree, Consumer<E> consumer, Function<E, List<E>> setSubChildren) {
+        for (E item : tree) {
+            List<E> childList = setSubChildren.apply(item);
+            if (childList != null && !childList.isEmpty()) {
+                forPostOrder(childList, consumer, setSubChildren);
+            }
+            consumer.accept(item);
+        }
+    }
+
+    /**
+     * 对树所有子节点按comparator排序
+     *
+     * @param tree        需要排序的树
+     * @param comparator  排序规则Comparator，如：Comparator.comparing(MenuVo::getRank)按Rank正序 ,(x,y)->y.getRank().compareTo(x.getRank())，按Rank倒序
+     * @param getChildren 获取下级数据方法，如：MenuVo::getSubMenus
+     * @param <E>         泛型实体对象
+     * @return 排序好的树
+     */
+    public static <E> List<E> sort(List<E> tree, Comparator<? super E> comparator, Function<E, List<E>> getChildren) {
+        for (E item : tree) {
+            List<E> childList = getChildren.apply(item);
+            if (childList != null && !childList.isEmpty()) {
+                sort(childList, comparator, getChildren);
+            }
+        }
+        tree.sort(comparator);
+        return tree;
+    }
+
+    private static <E> List<E> makeChildren(E parent, List<E> allData, BiFunction<E, E, Boolean> parentCheck, BiConsumer<E, List<E>> children) {
+        return allData.stream().filter(x -> parentCheck.apply(parent, x)).peek(x -> children.accept(x, makeChildren(x, allData, parentCheck, children))).collect(Collectors.toList());
+    }
+}
diff --git a/src/main/java/com/zsc/edu/gateway/modules/notice/entity/BulletinUser.java b/src/main/java/com/zsc/edu/gateway/modules/notice/entity/BulletinUser.java
new file mode 100644
index 0000000..16c3f19
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/modules/notice/entity/BulletinUser.java
@@ -0,0 +1,31 @@
+package com.zsc.edu.gateway.modules.notice.entity;
+
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+/**
+ * @author zhuang
+ */
+@Setter
+@Getter
+@NoArgsConstructor
+@AllArgsConstructor
+@TableName("sys_bulletin_user")
+public class BulletinUser {
+
+    /**
+     * 公告ID
+     */
+    public Long bulletinId;
+    /**
+     * 用户ID
+     */
+    public Long userId;
+    /**
+     * 是否已读
+     */
+    public Boolean isRead = true;
+}
diff --git a/src/main/java/com/zsc/edu/gateway/modules/notice/mapper/BulletinAttachmentMapper.java b/src/main/java/com/zsc/edu/gateway/modules/notice/mapper/BulletinAttachmentMapper.java
new file mode 100644
index 0000000..e3b4d0e
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/modules/notice/mapper/BulletinAttachmentMapper.java
@@ -0,0 +1,15 @@
+package com.zsc.edu.gateway.modules.notice.mapper;
+
+import com.zsc.edu.gateway.common.mapstruct.BaseMapper;
+import com.zsc.edu.gateway.modules.notice.dto.BulletinAttachmentDto;
+import com.zsc.edu.gateway.modules.notice.entity.BulletinAttachment;
+import org.mapstruct.Mapper;
+import org.mapstruct.ReportingPolicy;
+
+/**
+ * @author zhuang
+ */
+@Mapper(componentModel = "spring", unmappedTargetPolicy = ReportingPolicy.IGNORE)
+public interface BulletinAttachmentMapper extends BaseMapper<BulletinAttachmentDto, BulletinAttachment> {
+
+}
diff --git a/src/main/java/com/zsc/edu/gateway/modules/notice/repo/BulletinUserRepository.java b/src/main/java/com/zsc/edu/gateway/modules/notice/repo/BulletinUserRepository.java
new file mode 100644
index 0000000..79d8b52
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/modules/notice/repo/BulletinUserRepository.java
@@ -0,0 +1,16 @@
+package com.zsc.edu.gateway.modules.notice.repo;
+
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.zsc.edu.gateway.modules.notice.entity.BulletinUser;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
+
+/**
+ * @author zhuang
+ */
+public interface BulletinUserRepository extends BaseMapper<BulletinUser> {
+
+//    @Select("select * from sys_bulletin_user sbu where sbu.bulletin_id=#{bulletinId} and sbu.user_id=#{userId}")
+//    Boolean selectByBulletinIdAndUserId(@Param("bulletinId") Long bulletinId, @Param("userId") Long userId);
+}
diff --git a/src/main/java/com/zsc/edu/gateway/modules/notice/service/BulletinUserService.java b/src/main/java/com/zsc/edu/gateway/modules/notice/service/BulletinUserService.java
new file mode 100644
index 0000000..23a6996
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/modules/notice/service/BulletinUserService.java
@@ -0,0 +1,16 @@
+package com.zsc.edu.gateway.modules.notice.service;
+
+
+import com.baomidou.mybatisplus.extension.service.IService;
+import com.zsc.edu.gateway.framework.security.UserDetailsImpl;
+import com.zsc.edu.gateway.modules.notice.entity.BulletinUser;
+
+/**
+ * @author zhuang
+ */
+public interface BulletinUserService extends IService<BulletinUser> {
+
+    Boolean isRead(UserDetailsImpl userDetails, Long id);
+
+    void toggleIsRead(Long id);
+}
diff --git a/src/main/java/com/zsc/edu/gateway/modules/notice/service/impl/BulletinUserServiceImpl.java b/src/main/java/com/zsc/edu/gateway/modules/notice/service/impl/BulletinUserServiceImpl.java
new file mode 100644
index 0000000..4ecd28b
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/modules/notice/service/impl/BulletinUserServiceImpl.java
@@ -0,0 +1,61 @@
+package com.zsc.edu.gateway.modules.notice.service.impl;
+
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.zsc.edu.gateway.framework.security.UserDetailsImpl;
+import com.zsc.edu.gateway.modules.notice.entity.BulletinUser;
+import com.zsc.edu.gateway.modules.notice.repo.BulletinUserRepository;
+import com.zsc.edu.gateway.modules.notice.service.BulletinUserService;
+import lombok.AllArgsConstructor;
+import org.springframework.stereotype.Service;
+
+
+/**
+ * @author zhuang
+ */
+@AllArgsConstructor
+@Service
+public class BulletinUserServiceImpl extends ServiceImpl<BulletinUserRepository, BulletinUser> implements BulletinUserService {
+
+    /**
+     * 已读公告，每次已读自动获取用户id与公告id加入联表
+     *
+     * @param userDetails userDetails
+     * @param id          id
+     *                    return true
+     */
+    @Override
+    public Boolean isRead(UserDetailsImpl userDetails, Long id) {
+        if (id == null || userDetails.getId() == null) {
+            throw new IllegalArgumentException("Bulletin ID and User ID cannot be null");
+        }
+        QueryWrapper<BulletinUser> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq("bulletin_id", id)
+                .eq("user_id", userDetails.getId());
+        BulletinUser existingUser = getOne(queryWrapper);
+        if (existingUser == null) {
+            BulletinUser newUser = new BulletinUser();
+            newUser.setBulletinId(id);
+            newUser.setUserId(userDetails.getId());
+            newUser.setIsRead(false);
+            save(newUser);
+        } else {
+            UpdateWrapper<BulletinUser> updateWrapper = new UpdateWrapper<>();
+            updateWrapper.eq("bulletin_id", id).eq("user_id", userDetails.getId()).set("is_read", false);
+        }
+        return true;
+    }
+
+    /**
+     * 更新公告后修改已读状态
+     *
+     * @param id id
+     */
+    @Override
+    public void toggleIsRead(Long id) {
+        UpdateWrapper<BulletinUser> updateWrapper = new UpdateWrapper<>();
+        updateWrapper.eq("bulletin_id", id).set("is_read", true);
+    }
+
+}
diff --git a/src/main/java/com/zsc/edu/gateway/modules/system/vo/DeptTree.java b/src/main/java/com/zsc/edu/gateway/modules/system/vo/DeptTree.java
new file mode 100644
index 0000000..93a3657
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/modules/system/vo/DeptTree.java
@@ -0,0 +1,26 @@
+package com.zsc.edu.gateway.modules.system.vo;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.zsc.edu.gateway.modules.system.entity.User;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author zhuang
+ */
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class DeptTree {
+
+    private Long id;
+    @JsonIgnore
+    private Long pid;
+    private String name;
+    List<DeptTree> children = new ArrayList<>();
+    List<UserTree> members = new ArrayList<>();
+}
diff --git a/src/main/java/com/zsc/edu/gateway/modules/system/vo/UserTree.java b/src/main/java/com/zsc/edu/gateway/modules/system/vo/UserTree.java
new file mode 100644
index 0000000..7a35ea4
--- /dev/null
+++ b/src/main/java/com/zsc/edu/gateway/modules/system/vo/UserTree.java
@@ -0,0 +1,16 @@
+package com.zsc.edu.gateway.modules.system.vo;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * @author zhuang
+ */
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class UserTree {
+    private Long id;
+    private String name;
+}