| public void ConfigureServices(IServiceCollection services){
 services.AddControllers();
 services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)//默认授权机制
 .AddJwtBearer(options =>
 {
 options.TokenValidationParameters=new TokenValidationParameters()
 {
 ValidateIssuer = true,
 ValidateAudience = true,
 ValidateLifetime = true,
 ValidateIssuerSigningKey = true,
 ValidIssuer = _tokenParameter.Issuer,
 ValidAudience = _tokenParameter.Audience,
 IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_tokenParameter.SecurityKey))
 };
 });
 }
 public void Configure(IApplicationBuilder app, IWebHostEnvironment env){
 if (env.IsDevelopment())
 {
 app.UseDeveloperExceptionPage();
 }
 app.UseRouting();app.UseAuthentication();
 app.UseAuthorization();
 app.UseEndpoints(endpoints =>{
 endpoints.MapControllers();
 });
 }
 }
 }
 3、在资源控制器上添加[Authorize]属性,以启用认证授权访问API资源    [ApiController][Route("[controller]")]
 [Authorize]
 public class WeatherForecastController : ControllerBase
 {
 private static readonly string[] Summaries = new[]
 {
 "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
 };
 private readonly ILogger<WeatherForecastController> _logger; public WeatherForecastController(ILogger<WeatherForecastController> logger){
 _logger = logger;
 }
 [HttpGet]public IEnumerable<WeatherForecast> Get()
 {
 var rng = new Random();
 return Enumerable.Range(1, 5).Select(index => new WeatherForecast
 {
 Date = DateTime.Now.AddDays(index),
 TemperatureC = rng.Next(-20, 55),
 Summary = Summaries[rng.Next(Summaries.Length)]
 })
 .ToArray();
 }
 }
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