根据用户查询拥有的权限

src/main/java/com/xdap/self_development/controller/PermissionController.java

@@ -83,4 +83,13 @@ public class PermissionController {
         permissionService.deleteRole(roleId);
         return Response.ok().setMessage("删除角色成功");
     }
+
+    // 根据用户查询权限
+    @GetMapping("/selectPermByUserId")
+    public Response selectPermByUserId(
+            @NotBlank String userId
+    ) {
+        List<Permission> permissions = permissionService.selectPermissionByUser(userId);
+        return Response.ok().data(permissions);
+    }
 }

src/main/java/com/xdap/self_development/service/PermissionService.java

@@ -21,4 +21,6 @@ public interface PermissionService {
     void updateRole(@Valid UpdateRoleForm form);
 
     void deleteRole(@NotBlank String roleId);
+
+    List<Permission> selectPermissionByUser(String userId);
 }

src/main/java/com/xdap/self_development/service/impl/PermissionServiceImpl.java

@@ -12,11 +12,14 @@ import com.xdap.self_development.pojo.RoleAndPermissions;
 import com.xdap.self_development.pojo.UserAndRoles;
 import com.xdap.self_development.pojo.view.UserRoleAndPermissionView;
 import com.xdap.self_development.service.PermissionService;
+import org.apache.commons.lang3.ObjectUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import javax.annotation.Resource;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -140,4 +143,31 @@ public class PermissionServiceImpl implements PermissionService {
         // 删除角色
         bd.getBusinessDatabase().eq("id", roleId).doDelete(Role.class);
     }
+
+    @Override
+    public List<Permission> selectPermissionByUser(String userId) {
+        if (StringUtils.isEmpty(userId)) {
+            throw new RuntimeException("请传入用户");
+        }
+        //查询用户所拥有的角色
+        List<UserAndRoles> userAndRoleIds = bd.getBusinessDatabase()
+                .eq("user_id", userId)
+                .doQuery(UserAndRoles.class);
+        if (ObjectUtils.isNotEmpty(userAndRoleIds)) {
+            List<String> roleIds = userAndRoleIds.stream().map(x -> x.getRoleId()).collect(Collectors.toList());
+            //查询角色权限
+            List<RoleAndPermissions> roleAndPermissions = bd.getBusinessDatabase()
+                    .in("role_id", roleIds)
+                    .doQuery(RoleAndPermissions.class);
+            if (ObjectUtils.isEmpty(roleAndPermissions)) {
+                throw new RuntimeException("该角色没有分配权限");
+            }
+            List<String> permissionIds = roleAndPermissions.stream().map(x -> x.getPermissionId()).collect(Collectors.toList());
+            //组装返回
+            return bd.getBusinessDatabase()
+                    .in("id", permissionIds)
+                    .doQuery(Permission.class);
+        }
+        return Collections.emptyList();
+    }
 }