Java代码示例：用户角色分配方法实现

@Override\n public void doAssign(AssginRoleVo assginRoleVo) {\n //根据用户id删除原来分配的角色\n QueryWrapper<SysUserRole> queryWrapper = new QueryWrapper<>();\n queryWrapper.eq("user_id",assginRoleVo.getUserId());\n sysUserRoleMapper.delete(queryWrapper);\n //获取所有的角色id\n List<Long> roleIdList = assginRoleVo.getRoleIdList();\n for (Long roleId : roleIdList) {\n if (roleId != null) {\n SysUserRole sysUserRole = new SysUserRole();\n sysUserRole.setUserId(assginRoleVo.getUserId());\n sysUserRole.setRoleId(roleId);\n //保存\n sysUserRoleMapper.insert(sysUserRole);\n }\n }\n }