1、引入
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-boot-starter</artifactId>
    <version>3.0.0</version>
</dependency>
2、配置到WebMvcConfigurer
@Bean
public Docket createRestApi() {
    return new Docket(DocumentationType.OAS_30)//
            .apiInfo(apiInfo())//
            .select()//
            .apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))//
            .paths(PathSelectors.any())//
            .build();
}

private ApiInfo apiInfo() {
    return new ApiInfoBuilder().title("文档说明")// 文档说明
            .description("描述")// 文档描述
            .version("1.0.0")// 文档版本说明
            .build();

}
3、注解到Controller上
@Api(tags = "学生信息Controller")
4、注解到方法上
@ApiOperation(value ="json入参",notes = "注意点说明：接口通过id获取用户的详细信息，id必须传递")
方式一.
@ApiImplicitParams({
        @ApiImplicitParam(name = "sid", value = "用户id", required = true, dataType = "String", paramType = "query",defaultValue = "01"),
        @ApiImplicitParam(name = "sname", value = "用户姓名", required = false, dataType = "String", paramType = "query",defaultValue = "赵雷"),
})
方式二.
findAllStudent(@ApiParam(value = "id",name="id",required = true,defaultValue = "01") String id){

实体类注解：
@ApiModelProperty(value = "用户名")
private String username;

5、
访问http://localhost:8081/swagger-ui/index.html