添加配置

builder.Services.AddSwaggerGen(s =>
{
    //添加安全定义
    s.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
    {
        Description = "请输入token,格式为 Bearer xxxxxxxx（注意中间必须有空格）",
        Name = "Authorization",
        In = ParameterLocation.Header,
        Type = SecuritySchemeType.ApiKey,
        BearerFormat = "JWT",
        Scheme = "Bearer"
    });
    //添加安全要求
    s.AddSecurityRequirement(new OpenApiSecurityRequirement {
        {
            new OpenApiSecurityScheme{
                Reference =new OpenApiReference{
                    Type = ReferenceType.SecurityScheme,
                    Id ="Bearer"
                }
            },new string[]{ }
        }
    });
});

测试

参考：.Net6+webApi 给swagger添加token_net6 webapi openapisecurityscheme_菜鸟爱飞不飞的博客-CSDN博客