```c#
// 如果有几十个属性是相当的可怕的
var users = new Users
{
Email = user.Email,
Password = user.Password,
UserName = user.UserName
};
// 使用Automapper就容易多了
var model = _mapper.Map<Users>(user);
```
先安装依赖包
在项目根目录的 AutoMapper 文件夹中 新建 AutoMapperConfig 类，来管理我们的映射关系。
```c#
using AutoMapper;
using CodeUin.Dapper.Entities;
using CodeUin.WebApi.Models;
namespace CodeUin.WebApi.AutoMapper
{
public class AutoMapperConfig : Profile
{
public AutoMapperConfig()
{
CreateMap<UserRegisterModel, Users>().ReverseMap();
CreateMap<UserLoginModel, Users>().ReverseMap();
CreateMap<UserLoginModel, UserModel>().ReverseMap();
CreateMap<UserModel, Users>().ReverseMap();
}
}
}
```
最后，在 Startup 文件的 ConfigureServices 方法中 添加 services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies()) 即可。
#### 使用JWT
下面将集成JWT，来处理授权等信息。首先，需要安装依赖包。
修改 appsttings.json 文件，添加 Jwt 配置信息。
```c#
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"AllowedHosts": "*",
"Jwt": {
"Key": "e816f4e9d7a7be785a", // 这个key必须大于16位数，非常生成的时候会报错
"Issuer": "codeuin.com"
}
}
```
最后，在 Startup 类的 ConfigureServices 方法中添加 Jwt 的使用。
```c#
services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
.AddJwtBearer(options =>
{
options.TokenValidationParameters = new TokenValidationParameters
{
ValidateIssuer = true,
ValidateAudience = true,
ValidateLifetime = true,
ClockSkew = TimeSpan.FromMinutes(5), //缓冲过期时间 默认5分钟
ValidateIssuerSigningKey = true,
ValidIssuer = Configuration["Jwt:Issuer"],
ValidAudience = Configuration["Jwt:Issuer"],
IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["Jwt:Key"]))
};
});
```
好了，最终我们的 Startup 类是这样子的，关于自定义的参数验证后面会讲到。
```c#
using Autofac;
using AutoMapper;
using CodeUin.WebApi.Autofac;
using CodeUin.WebApi.Filters;
using CodeUin.WebApi.Helpers;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.IdentityModel.Tokens;
using System;
using System.Text;
namespace CodeUin.WebApi
{
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
public void ConfigureContainer(ContainerBuilder builder)
{
// 依赖注入
builder.RegisterModule(new CustomAutofacModule());
}
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
.AddJwtBearer(options =>
{
options.TokenValidationParameters = new TokenValidationParameters
{
ValidateIssuer = true,
ValidateAudience = true,
ValidateLifetime = true,
ClockSkew = TimeSpan.FromMinutes(5), //缓冲过期时间 默认5分钟
ValidateIssuerSigningKey = true,
ValidIssuer = Configuration["Jwt:Issuer"],
ValidAudience = Configuration["Jwt:Issuer"],
IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["Jwt:Key"]))
};
});
services.AddHttpContextAccessor();
// 使用AutoMapper
services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());
// 关闭参数自动校验
services.Configure<ApiBehaviorOptions>((options) =>
{
options.SuppressModelStateInvalidFilter = true;
});
// 使用自定义验证器
services.AddControllers(options =>
{
options.Filters.Add<ValidateModelAttribute>();
}).
AddJsonOptions(options =>
{
// 忽略null值
options.JsonSerializerOptions.IgnoreNullValues = true;
});
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
// 请求错误提示配置
app.UseErrorHandling();
// 授权
app.UseAuthentication();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
```
#### 新建实体类
我将新建三个实体类，分别是 UserLoginModel 用户登录，UserRegisterModel 用户注册，UserModel 用户基本信息。
UserLoginModel 和 UserRegisterModel 将根据我们在属性中配置的特性自动验证合法性，就不需要在控制器中单独写验证逻辑了，极大的节省了工作量。
```c#
using System;
using System.ComponentModel.DataAnnotations;
namespace CodeUin.WebApi.Models
{
/// <summary>
/// 用户实体类
/// </summary>
public class UserModel
{
public int Id { get; set; }
public string Email { get; set; }
public string UserName { get; set; }
public string Mobile { get; set; }
public int Gender { get; set; }
public int Age { get; set; }
public string Avatar { get; set; }
}
public class UserLoginModel
{
[Required(ErrorMessage = "请输入邮箱")]
public string Email { get; set; }
[Required(ErrorMessage = "请输入密码")]
public string Password { get; set; }
}