完成用户的角色分配，妥妥的。睡觉~

src/main/java/cn/iocoder/dashboard/modules/system/service/permission/SysPermissionService.java

@@ -59,6 +59,22 @@ public interface SysPermissionService {
      */
     void assignRoleMenu(Long roleId, Set<Long> menuIds);
 
+    /**
+     * 获得用户拥有的角色编号集合
+     *
+     * @param userId 用户编号
+     * @return 角色编号集合
+     */
+    Set<Long> listUserRoleIs(Long userId);
+
+    /**
+     * 设置用户角色
+     *
+     * @param userId 角色编号
+     * @param roleIds 角色编号集合
+     */
+    void assignUserRole(Long userId, Set<Long> roleIds);
+
     /**
      * 设置角色的数据权限
      *

src/main/java/cn/iocoder/dashboard/modules/system/service/permission/SysRoleService.java

@@ -6,6 +6,7 @@ import cn.iocoder.dashboard.modules.system.controller.permission.vo.role.SysRole
 import cn.iocoder.dashboard.modules.system.controller.permission.vo.role.SysRoleUpdateReqVO;
 import cn.iocoder.dashboard.modules.system.dal.mysql.dataobject.permission.SysRoleDO;
 
+import javax.annotation.Nullable;
 import java.util.Collection;
 import java.util.List;
 import java.util.Set;
@@ -30,6 +31,14 @@ public interface SysRoleService {
      */
     SysRoleDO getRoleFromCache(Long id);
 
+    /**
+     * 获得角色列表
+     *
+     * @param statuses 筛选的状态。允许空，空时不筛选
+     * @return 角色列表
+     */
+    List<SysRoleDO> listRoles(@Nullable Collection<Integer> statuses);
+
     /**
      * 获得角色数组，从缓存中
      *

src/main/java/cn/iocoder/dashboard/modules/system/service/permission/impl/SysPermissionServiceImpl.java

@@ -142,6 +142,29 @@ public class SysPermissionServiceImpl implements SysPermissionService {
         }
     }
 
+    @Override
+    public Set<Long> listUserRoleIs(Long userId) {
+        return CollectionUtils.convertSet(userRoleMapper.selectListByUserId(userId),
+                SysUserRoleDO::getRoleId);
+    }
+
+    @Override
+    public void assignUserRole(Long userId, Set<Long> roleIds) {
+        // 获得角色拥有角色编号
+        Set<Long> dbRoleIds = CollectionUtils.convertSet(userRoleMapper.selectListByUserId(userId),
+                SysUserRoleDO::getRoleId);
+        // 计算新增和删除的角色编号
+        Collection<Long> createRoleIds = CollUtil.subtract(roleIds, dbRoleIds);
+        Collection<Long> deleteMenuIds = CollUtil.subtract(dbRoleIds, roleIds);
+        // 执行新增和删除。对于已经授权的角色，不用做任何处理
+        if (!CollectionUtil.isEmpty(createRoleIds)) {
+            userRoleMapper.insertList(userId, createRoleIds);
+        }
+        if (!CollectionUtil.isEmpty(deleteMenuIds)) {
+            userRoleMapper.deleteListByUserIdAndRoleIdIds(userId, deleteMenuIds);
+        }
+    }
+
     @Override
     public void assignRoleDataScope(Long roleId, Integer dataScope, Set<Long> dataScopeDeptIds) {
         roleService.updateRoleDataScope(roleId, dataScope, dataScopeDeptIds);

src/main/java/cn/iocoder/dashboard/modules/system/service/permission/impl/SysRoleServiceImpl.java

@@ -21,6 +21,7 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.StringUtils;
 
+import javax.annotation.Nullable;
 import javax.annotation.PostConstruct;
 import javax.annotation.Resource;
 import java.util.*;
@@ -71,6 +72,11 @@ public class SysRoleServiceImpl implements SysRoleService {
         return roleCache.get(id);
     }
 
+    @Override
+    public List<SysRoleDO> listRoles(@Nullable Collection<Integer> statuses) {
+        return roleMapper.selectListByStatus(statuses);
+    }
+
     @Override
     public List<SysRoleDO> listRolesFromCache(Collection<Long> ids) {
         if (CollectionUtil.isEmpty(ids)) {