Permission management - delete menu (recursive)

    //============ Recursively delete menu ==================================
    @Override
    public void removeChildByIdGuli(String id) {
        //1  establish list aggregate , Used to encapsulate all delete menus id value 
        List<String> idList = new ArrayList<>();
        //2  towards idList Set settings delete menu id,（ according to Id Delete menu ）				
        this.selectPermissionChildById(id,idList);
        // Put the present id Package to list Inside 
        idList.add(id);
        baseMapper.deleteBatchIds(idList);// Start with the end , Finally, I want to delete a collection , So a new set is created on it 
    }
 
    //2  According to the current menu id, Sub menu in the query menu id, Package to list aggregate 
    private void selectPermissionChildById(String id, List<String> idList) {
        // Sub menu in the query menu id
        QueryWrapper<Permission>  wrapper = new QueryWrapper<>();
        wrapper.eq("pid",id);
        wrapper.select("id");
        List<Permission> childIdList = baseMapper.selectList(wrapper);
        // hold childIdList Inside the menu id It's worth getting , encapsulation idList Inside , Do recursive queries 
        childIdList.stream().forEach(item -> {
            // encapsulation idList Inside 
            idList.add(item.getId());// adopt Id Batch query , Because it's deleteBatchIds(idList）
            // recursive query 
            this.selectPermissionChildById(item.getId(),idList);
        });
    }

 //============ Recursively delete menu ==================================
    @Override
    public void removeChildByIdGuli(String id) {
        //1  establish list aggregate , Used to encapsulate all delete menus id value 
        List<String> idList【 Encapsulate the to be deleted Id】 = new ArrayList<>();
        //2  towards idList Set settings delete menu id,（ according to Id Delete menu ）                
        this.selectPermissionChildById(id,idList);
        // Put the present id Package to list Inside 
        idList【 Encapsulate the to be deleted Id】 .add(id);
        baseMapper.deleteBatchIds(idList【 Encapsulate the to be deleted Id】 );// Start with the end , Finally, I want to delete a collection , So a new set is created on it 
    }

    //2  According to the current menu id, Sub menu in the query menu id, Package to list aggregate 
    private void selectPermissionChildById(String id, List<String> idList【 Encapsulate the to be deleted Id】) {
        // Sub menu in the query menu id
        QueryWrapper<Permission>  wrapper = new QueryWrapper<>();
        wrapper.eq("pid【1 level Id】 ",id【2 level Id】);
        wrapper.select("id");// Put all the 2 level id Is in the 1 level id Of id They're all screened out 
        List<Permission> childIdList = baseMapper.selectList(wrapper);//【 Meet the above conditions 2 level Id】
        // hold childIdList Inside the menu id It's worth getting , encapsulation idList Inside , Do recursive queries 
        childIdList.stream().forEach(item -> {
            // encapsulation idList Inside 
            idList【 Encapsulate the to be deleted Id】.add(item.getId());// adopt Id Batch query , Because it's deleteBatchIds(idList）
            // recursive query 
            this.selectPermissionChildById(item.getId()【 Meet the above conditions 2 level Id】,idList【 Encapsulate the to be deleted Id】);
        });
    }