java8 分页查询

SsoUserRoleDto实体对象
    @ApiModelProperty(value = "角色所属的应用系统id")
    private Long appSystemId;

    @ApiModelProperty(value = "角色所属的应用系统code")
    private String appSystemCode;

    @ApiModelProperty(value = "角色所属的应用系统名称")
    private String appSystemName;

    @ApiModelProperty(value = "角色id")
    private Long roleId;

    @ApiModelProperty(value = "角色code")
    private String roleCode;

    @ApiModelProperty(value = "角色名称")
    private String roleName;

// 按照 系统分组

Map<Long, List<SsoUserRoleDto>> groupBy =
    ssoUserRoleDtos.stream().collect(Collectors.groupingBy(SsoUserRoleDto::getAppSystemId));

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转载自blog.csdn.net/qq_39999478/article/details/112973111