问题

@Data
@Accessors(chain = true)
public class CreateTemplateReq {
    @ApiModelProperty(value = "**名称")
    @Pattern(regexp = "^.{0,100}", message = "名称长度不可超过100")
    @NotBlank(message = "**名称必填")
    private String templateTitle;

    @ApiModelProperty(value = "描述")
    @Pattern(regexp = "^.{0,255}", message = "描述长度不可超过255")
    @NotBlank(message = "描述必填")
    private String templateDesc;

    @ApiModelProperty(value = "类型")
    @NotNull(message = "类型不能为空")
    private Integer templateType;

    @ApiModelProperty(value = "**")
    private List<CreateTemplateStagesReq> stages;

}

@Data
@Accessors(chain = true)
public class CreateTemplateStagesReq {
    @ApiModelProperty(value = "**名称")
    @Pattern(regexp = "^.{0,20}", message = "**名称长度不可超过20")
    private String stageTitle;

    @ApiModelProperty(value = "**描述")
    @Pattern(regexp = "^.{0,255}", message = "描述长度不可超过255")
    private String stageDesc;

    @ApiModelProperty(value = "****")
    private Integer formType;

    @ApiModelProperty(value = "**索引")
    private Integer templateStageIndex;

    @ApiModelProperty(value = "**")
    private List<CreateTemplateDeliversReq> delivers;

}

多层嵌套对象，发现里面的对象 注解不生效

public Result create(@RequestBody @Valid CreateTemplateReq param) {

}

解决方法

    @ApiModelProperty(value = "**")
    @Valid
    private List<CreateTemplateStagesReq> stages;

    @ApiModelProperty(value = "**")
    @Valid
    private List<CreateTemplateDeliversReq> delivers;

这样就解决了