ini复制代码int[] arr1 = new int[10]; // 定义一个长度为10的数组
int[] arr2 = {1,2,3,4,5}; // 那么此时数组的长度为5

php复制代码<div id="hh">
       打印内容展示
</div>
<button class="btn btn-default btn-xs" type="button" id ="aaa">打印</button>


$(document).ready(function(){     
      $("#aaa").click(function(){ 
         $.ajax({
            type:"post",
            url:"{:url('Mall/orderface')}",
            data:'number='+$number+'&id='+$id,
            dataType:'json',                
            success:function(data){                   
            if (data.ret == 0){                        
                 alert(data.msg);                    
            }else{                        
              $count = data.data.length;                                            
              for (var i=0;i<$count;i++){                                                    
                 $('#hh').html(data.data);                            
                 $('#hh').show();                           
                 $("#hh").printArea();                            
                 $('#hh').hide();                        
              }                    
            }                
            }            
         });
       }); 
});

public function orderface(){
    $id = $_POST['id'];
    $number = $_POST['number'];
    $config_model = new Config();
    $config = $config_model->findOne(['uid'=>UID]);
    $mall_order_model = new MallOrder();
    $order = $mall_order_model->findOne(['uid' => 2, 'id' => $id]);
    //构造电子面单提交信息
    //收件人信息 
    $receiver = [
        "Name"=>$order['linkman'],//收件人
        "Mobile"=>$order['mobile_phone'],//电话与手机，必填一个
        "ProvinceName"=>$order['province'],//收件省
        "CityName"=>$order['city'],//收件市
        "ExpAreaName"=>$order['area'],//收件区/县
        "Address"=>$order['address'],//收件人详细地址
    ];
    //发件人信息
    $sender = [
        "Name"=>$config['sender_name'],//发件人
        "Mobile"=>$config['sender_phone'],//电话与手机，必填一个
        "ProvinceName"=>$config['province'],//收件省
        "CityName"=>$config['city'],//发件市
        "ExpAreaName"=>$config['area'],//发件区/县
        "Address"=>$config['sender_address'],//发件人详细地址
    ];
    $commodity = [];
    if ($id) {
        $order_id = $id;
        $mall_order_product_model = new MallOrderProduct();
        $order_product = $mall_order_product_model->selectList(['order_id' => array('IN', $order_id)]);
        foreach ($order_product as $key => $value) {
            $sku_name = $this->skuToName($value['product_sku'], $value['product_id']);
            $arr = [
                "GoodsName"=>$value['product_name'].$sku_name,
                "Goodsquantity"=>$value['number'],
                "GoodsPrice"=>$value['product_price']
            ];
            array_push($commodity,$arr);
        }
    }
    $kdiniao_express_model = new KdiniaoExpress();
    $code = $kdiniao_express_model->where(['id'=>$order['express_id']])->find();
    $eorder = [
        "ShipperCode"=>$code['encipher'],//快递公司编码
        "OrderCode"=>$order['order_number'],//订单编号(自定义，不可重复)
        "PayType"=>1,//邮费支付方式:1-现付，2-到付，3-月结，4-第三方支付(仅SF支持)
        "ExpType"=>1,//快递类型：1-标准快件
        "Sender"=>$sender,
        "Receiver"=>$receiver,
        "Commodity"=>$commodity,
        "Quantity"=>(int)$number,//包裹数(最多支持30件)
        "Remark"=>"",//备注
        "IsReturnPrintTemplate"=>1//返回电子面单模板：0-不需要；1-需要
    ];
    $jsonParam = json_encode($eorder, JSON_UNESCAPED_UNICODE);
    $jc_api_model = new JcApi();
    $result = $jc_api_model->getExterFaceByKdniao($jsonParam);
    //解析电子面单返回结果
    $result = json_decode($result, true);
    if ($result['Success'] == false){
        return ajaxFalse($result['Reason']);
    }
    $PrintTemplate = [
        $result['PrintTemplate']
    ];
    if (array_key_exists('SubPrintTemplates',$result)){
        foreach($result['SubPrintTemplates'] as $kay => $val){
            array_push($PrintTemplate,$val);
        }
    }
    return ajaxSuccess($PrintTemplate);
}
function getExterFaceByKdniao($content)
{
        $jc_third_party_config_model = new JcThirdPartyConfig();
        $deliver_kdniao_config = $jc_third_party_config_model->getKdniaoDeliveryConfig();
        // 测试$deliver_kdniao_config = ['kdniao_user_id'=>'test1597343','kdniao_api_key'=>'07ca9479-e5ff-4e72-81cf-32511eb30000'];
        $datas = array(
            'EBusinessID' => $deliver_kdniao_config['kdniao_user_id'],//客户id
            'RequestType' => '1007',
            'RequestData' => urlencode($content) ,
            'DataType' => '2',
        );
        $datas['DataSign'] = $this->encrypt($content, $deliver_kdniao_config['kdniao_api_key']);
//        $url = "http://sandboxapi.kdniao.com:8080/kdniaosandbox/gateway/exterfaceInvoke.json";//测试
        $url = "https://api.kdniao.com/api/EOrderService";//正式
        $result = $this->sendPost($url, $datas);
        return $result;
    }
//生成签名
function encrypt($data, $appkey) 
{
    return urlencode(base64_encode(md5($data.$appkey)));
}/** *  post提交数据 * @param */
function sendPost($url, $datas) {
    $temps = array();
    foreach ($datas as $key => $value) {
        $temps[] = sprintf('%s=%s', $key, $value);
    }
    $post_data = implode('&', $temps);
    $url_info = parse_url($url);
    if(empty($url_info['port']))
    {
        $url_info['port']=80;
    }
    $httpheader = "POST " . $url_info['path'] . " HTTP/1.0\r\n";
    $httpheader.= "Host:" . $url_info['host'] . "\r\n";
    $httpheader.= "Content-Type:application/x-www-form-urlencoded\r\n";
    $httpheader.= "Content-Length:" . strlen($post_data) . "\r\n";
    $httpheader.= "Connection:close\r\n\r\n";
    $httpheader.= $post_data;
    $fd = fsockopen($url_info['host'], $url_info['port']);
    fwrite($fd, $httpheader);
    $gets = "";
    $headerFlag = true;
    while (!feof($fd)) {
        if (($header = @fgets($fd)) && ($header == "\r\n" || $header == "\n")) {
            break;
        }
    }
    while (!feof($fd)) {
        $gets.= fread($fd, 128);
    }
    fclose($fd);
    return $gets;
}

cmd复制代码# 下载镜像
docker pull mysql
# 运行
docker run -itd --name 容器名称 -p 3306:3306 -e MYSQL_ROOT_PASSWORD=你的密码 mysql

shell复制代码# 查看当前运行的容器
docker ps 
# 进入容器
docker exec -it 容器名称 bash
# 访问MySQL
mysql -u root -p
# 查看加密规则
select host,user,plugin,authentication_string from mysql.user;
# 对远程连接进行授权
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;
# 更改密码加密规则
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '你的密码';
# 刷新权限
flush privileges;

shell复制代码# 下载镜像
docker pull redis
# 运行
docker run -itd -p 6379:6379 redis

shell复制代码# 安装SDK
sudo dnf install dotnet-sdk-5.0
# 安装运行时
sudo dnf install aspnetcore-runtime-5.0

c#复制代码using System;

namespace CodeUin.Dapper
{
    /// <summary>
    /// 基础实体类
    /// </summary>
    public class BaseModel
    {
        /// <summary>
        /// 主键Id
        /// </summary>
        public int Id { get; set; }

        /// <summary>
        /// 创建时间
        /// </summary>
        public DateTime CreateTime { get; set; }
    }
}

c#复制代码using MySql.Data.MySqlClient;
using System.Data;

namespace CodeUin.Dapper
{
    public class DataBaseConfig
    {
        private static string MySqlConnectionString = @"Data Source=数据库地址;Initial Catalog=codeuin;Charset=utf8mb4;User 		ID=root;Password=数据库密码;";
        
        public static IDbConnection GetMySqlConnection(string sqlConnectionString = null)
        {
            if (string.IsNullOrWhiteSpace(sqlConnectionString))
            {
                sqlConnectionString = MySqlConnectionString;
            }
            IDbConnection conn = new MySqlConnection(sqlConnectionString);
            conn.Open();
            return conn;
        }
    }
}

c#复制代码using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace CodeUin.Dapper
{
    public interface IRepositoryBase<T>
    {
        Task<int> Insert(T entity, string insertSql);

        Task Update(T entity, string updateSql);

        Task Delete(int Id, string deleteSql);

        Task<List<T>> Select(string selectSql);

        Task<T> Detail(int Id, string detailSql);
    }
}

c#复制代码using Dapper;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Threading.Tasks;

namespace CodeUin.Dapper
{
    public class RepositoryBase<T> : IRepositoryBase<T>
    {
        public async Task Delete(int Id, string deleteSql)
        {
            using (IDbConnection conn = DataBaseConfig.GetMySqlConnection())
            {
                await conn.ExecuteAsync(deleteSql, new { Id });
            }
        }

        public async Task<T> Detail(int Id, string detailSql)
        {
            using (IDbConnection conn = DataBaseConfig.GetMySqlConnection())
            {
                return await conn.QueryFirstOrDefaultAsync<T>(detailSql, new { Id });
            }
        }

        public async Task<List<T>> ExecQuerySP(string SPName)
        {
            using (IDbConnection conn = DataBaseConfig.GetMySqlConnection())
            {
                return await Task.Run(() => conn.Query<T>(SPName, null, null, true, null, CommandType.StoredProcedure).ToList());
            }
        }

        public async Task<int> Insert(T entity, string insertSql)
        {
            using (IDbConnection conn = DataBaseConfig.GetMySqlConnection())
            {
                return await conn.ExecuteAsync(insertSql, entity);
            }
        }

        public async Task<List<T>> Select(string selectSql)
        {
            using (IDbConnection conn = DataBaseConfig.GetMySqlConnection())
            {
                return await Task.Run(() => conn.Query<T>(selectSql).ToList());
            }
        }

        public async Task Update(T entity, string updateSql)
        {
            using (IDbConnection conn = DataBaseConfig.GetMySqlConnection())
            {
                await conn.ExecuteAsync(updateSql, entity);
            }
        }
    }
}

c#复制代码namespace CodeUin.Dapper.Entities
{
    /// <summary>
    /// 用户表
    /// </summary>
    public class Users : BaseModel
    {
        /// <summary>
        /// 用户名
        /// </summary>
        public string UserName { get; set; }

        /// <summary>
        /// 密码
        /// </summary>
        public string Password { get; set; }

        /// <summary>
        /// 盐
        /// </summary>
        public string Salt { get; set; }

        /// <summary>
        /// 邮箱
        /// </summary>
        public string Email { get; set; }

        /// <summary>
        /// 手机号
        /// </summary>
        public string Mobile { get; set; }

        /// <summary>
        /// 性别
        /// </summary>
        public int Gender { get; set; }

        /// <summary>
        /// 年龄
        /// </summary>
        public int Age { get; set; }

        /// <summary>
        /// 头像
        /// </summary>
        public string Avatar { get; set; }

        /// <summary>
        /// 是否删除
        /// </summary>
        public int IsDelete { get; set; }
    }
}

c#复制代码using CodeUin.Dapper.Entities;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace CodeUin.Dapper.IRepository
{
    public interface IUserRepository : IRepositoryBase<Users>
    {
        Task<List<Users>> GetUsers();

        Task<int> AddUser(Users entity);

        Task DeleteUser(int d);

        Task<Users> GetUserDetail(int id);

        Task<Users> GetUserDetailByEmail(string email);
    }
}

c#复制代码using CodeUin.Dapper.Entities;
using CodeUin.Dapper.IRepository;
using Dapper;
using System.Collections.Generic;
using System.Data;
using System.Threading.Tasks;

namespace CodeUin.Dapper.Repository
{
    public class UserRepository : RepositoryBase<Users>, IUserRepository
    {
        public async Task DeleteUser(int id)
        {
            string deleteSql = "DELETE FROM [dbo].[Users] WHERE Id=@Id";
            await Delete(id, deleteSql);
        }


        public async Task<Users> GetUserDetail(int id)
        {
            string detailSql = @"SELECT Id, Email, UserName, Mobile, Password, Age, Gender, CreateTime,Salt, IsDelete FROM Users WHERE Id=@Id";
            return await Detail(id, detailSql);
        }

        public async Task<Users> GetUserDetailByEmail(string email)
        {
            string detailSql = @"SELECT Id, Email, UserName, Mobile, Password, Age, Gender, CreateTime, Salt, IsDelete FROM Users WHERE Email=@email";

            using (IDbConnection conn = DataBaseConfig.GetMySqlConnection())
            {
                return await conn.QueryFirstOrDefaultAsync<Users>(detailSql, new { email });
            }
        }

        public async Task<List<Users>> GetUsers()
        {
            string selectSql = @"SELECT * FROM Users";
            return await Select(selectSql);
        }

        public async Task<int> AddUser(Users entity)
        {
            string insertSql = @"INSERT INTO Users (UserName, Gender, Avatar, Mobile, CreateTime, Password, Salt, IsDelete, Email) VALUES (@UserName, @Gender, @Avatar, @Mobile, now(),@Password, @Salt, @IsDelete,@Email);SELECT @id= LAST_INSERT_ID();";
            return await Insert(entity, insertSql);
        }
    }
}

sql复制代码DROP TABLE IF EXISTS `Users`;
CREATE TABLE `Users` (
  `Id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键',
  `Email` varchar(255) DEFAULT NULL COMMENT '邮箱',
  `UserName` varchar(20) DEFAULT NULL COMMENT '用户名称',
  `Mobile` varchar(11) DEFAULT NULL COMMENT '手机号',
  `Age` int(11) DEFAULT NULL COMMENT '年龄',
  `Gender` int(1) DEFAULT '0' COMMENT '性别',
  `Avatar` varchar(255) DEFAULT NULL COMMENT '头像',
  `Salt` varchar(255) DEFAULT NULL COMMENT '加盐',
  `Password` varchar(255) DEFAULT NULL COMMENT '密码',
  `IsDelete` int(2) DEFAULT '0' COMMENT '0-正常 1-删除',
  `CreateTime` datetime DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  PRIMARY KEY (`Id`),
  UNIQUE KEY `USER_MOBILE_INDEX` (`Mobile`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=10000 DEFAULT CHARSET=utf8mb4 COMMENT='用户信息表';

c#复制代码using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System;
using System.Threading.Tasks;

namespace CodeUin.WebApi.Helpers
{
    public class ErrorHandlingMiddleware
    {
        private readonly RequestDelegate next;
        private readonly ILogger<ErrorHandlingMiddleware> _logger;

        public ErrorHandlingMiddleware(RequestDelegate next, ILogger<ErrorHandlingMiddleware> logger)
        {
            this.next = next;
            _logger = logger;
        }

        public async Task Invoke(HttpContext context)
        {
            try
            {
                await next(context);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex.Message);

                var statusCode = 500;

                await HandleExceptionAsync(context, statusCode, ex.Message);
            }
            finally
            {
                var statusCode = context.Response.StatusCode;
                var msg = "";

                if (statusCode == 401)
                {
                    msg = "未授权";
                }
                else if (statusCode == 404)
                {
                    msg = "未找到服务";
                }
                else if (statusCode == 502)
                {
                    msg = "请求错误";
                }
                else if (statusCode != 200)
                {
                    msg = "未知错误";
                }
                if (!string.IsNullOrWhiteSpace(msg))
                {
                    await HandleExceptionAsync(context, statusCode, msg);
                }
            }
        }

        // 异常错误信息捕获，将错误信息用Json方式返回
        private static Task HandleExceptionAsync(HttpContext context, int statusCode, string msg)
        {
            var result = JsonConvert.SerializeObject(new { Msg = msg, Code = statusCode });

            context.Response.ContentType = "application/json;charset=utf-8";

            return context.Response.WriteAsync(result);
        }
    }

    // 扩展方法
    public static class ErrorHandlingExtensions
    {
        public static IApplicationBuilder UseErrorHandling(this IApplicationBuilder builder)
        {
            return builder.UseMiddleware<ErrorHandlingMiddleware>();
        }
    }
}

c#复制代码public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }

    app.UseHttpsRedirection();

    // 请求错误提示配置
    app.UseErrorHandling();

    app.UseRouting();

    app.UseAuthorization();

    app.UseEndpoints(endpoints =>
    {
  		endpoints.MapControllers();
    });
}

xml复制代码<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true"
      internalLogLevel="Info"
      internalLogFile="c:\temp\internal-nlog.txt">

	<!-- enable asp.net core layout renderers -->
	<extensions>
		<add assembly="NLog.Web.AspNetCore"/>
	</extensions>

	<!-- the targets to write to -->
	<targets>

		<target xsi:type="File" name="allfile" fileName="${currentdir}\logs\nlog-all-${shortdate}.log"
				layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${aspnet-request-ip}|${logger}|${message} ${exception:format=tostring}" />

		<target xsi:type="Console" name="ownFile-web"
				layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${aspnet-request-ip}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}" />
	</targets>
	<!-- rules to map from logger name to target -->
	<rules>
		<!--All logs, including from Microsoft-->
		<logger name="*" minlevel="Info" writeTo="allfile" />

		<!--Skip non-critical Microsoft logs and so log only own logs-->
		<logger name="Microsoft.*" maxlevel="Info" final="true" />
		<!-- BlackHole without writeTo -->
		<logger name="*" minlevel="Info" writeTo="ownFile-web" />
	</rules>
</nlog>

c#复制代码using Autofac.Extensions.DependencyInjection;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using NLog.Web;

namespace CodeUin.WebApi
{
    public class Program
    {
        public static void Main(string[] args)
        {
            NLogBuilder.ConfigureNLog("nlog.config");
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .UseServiceProviderFactory(new AutofacServiceProviderFactory())
                .ConfigureLogging(logging =>
                {
                    logging.ClearProviders();
                    logging.AddConsole();
                })
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                })
                .UseNLog();
    }
}

c#复制代码using Autofac;
using CodeUin.Dapper.IRepository;
using CodeUin.Dapper.Repository;

namespace CodeUin.WebApi.Autofac
{
    public class CustomAutofacModule:Module
    {
        protected override void Load(ContainerBuilder builder)
        {
            builder.RegisterType<UserRepository>().As<IUserRepository>();
        }
    }
}

c#复制代码public void ConfigureContainer(ContainerBuilder builder)
{
    // 依赖注入
    builder.RegisterModule(new CustomAutofacModule());
}

c#复制代码// 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);

c#复制代码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();
        }
    }
}

c#复制代码{
    "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"
    }
}

c#复制代码     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"]))
                };
            });

c#复制代码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();
            });
        }
    }
}

c#复制代码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; }
    }

    public class UserRegisterModel
    {
        [Required(ErrorMessage = "请输入邮箱")]
        [EmailAddress(ErrorMessage = "请输入正确的邮箱地址")]
        public string Email { get; set; }

        [Required(ErrorMessage = "请输入用户名")]
        [MaxLength(length: 12, ErrorMessage = "用户名最大长度不能超过12")]
        [MinLength(length: 2, ErrorMessage = "用户名最小长度不能小于2")]
        public string UserName { get; set; }

        [Required(ErrorMessage = "请输入密码")]
        [MaxLength(length: 20, ErrorMessage = "密码最大长度不能超过20")]
        [MinLength(length: 6, ErrorMessage = "密码最小长度不能小于6")]
        public string Password { get; set; }
    }
}

c#复制代码using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;
using System.Linq;

namespace CodeUin.WebApi.Filters
{
    public class ValidateModelAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext context)
        {
            if (!context.ModelState.IsValid)
            {
                var item = context.ModelState.Keys.ToList().FirstOrDefault();

                //返回第一个验证参数错误的信息
                context.Result = new BadRequestObjectResult(new
                {
                    Code = 400,
                    Msg = context.ModelState[item].Errors[0].ErrorMessage
                });
            }
        }
    }
}

c#复制代码using System.ComponentModel.DataAnnotations;
using System.Text.RegularExpressions;

namespace CodeUin.WebApi.Filters
{
    public class ChineMobileAttribute : ValidationAttribute
    {
        public override bool IsValid(object value)
        {
            if (!(value is string)) return false;

            var val = (string)value;

            return Regex.IsMatch(val, @"^[1]{1}[2,3,4,5,6,7,8,9]{1}\d{9}$");
        }
    }
}

c#复制代码using System;
using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;
using AutoMapper;
using CodeUin.Dapper.Entities;
using CodeUin.Dapper.IRepository;
using CodeUin.Helpers;
using CodeUin.WebApi.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using Microsoft.IdentityModel.Tokens;

namespace CodeUin.WebApi.Controllers
{
    [Route("api/[controller]/[action]")]
    [ApiController]
    [Authorize]
    public class UsersController : Controller
    {
        private readonly ILogger<UsersController> _logger;
        private readonly IUserRepository _userRepository;
        private readonly IMapper _mapper;
        private readonly IConfiguration _config;
        private readonly IHttpContextAccessor _httpContextAccessor;

        public UsersController(ILogger<UsersController> logger, IUserRepository userRepository, IMapper mapper, IConfiguration config, IHttpContextAccessor httpContextAccessor)
        {
            _logger = logger;
            _userRepository = userRepository;
            _mapper = mapper;
            _config = config;
            _httpContextAccessor = httpContextAccessor;
        }

        [HttpGet]
        public async Task<JsonResult> Get()
        {
            var userId = int.Parse(_httpContextAccessor.HttpContext.User.FindFirst(ClaimTypes.NameIdentifier).Value);

            var userInfo = await _userRepository.GetUserDetail(userId);

            if (userInfo == null)
            {
                return Json(new { Code = 200, Msg = "未找到该用户的信息" });
            }

            var outputModel = _mapper.Map<UserModel>(userInfo);

            return Json(new { Code = 200, Data = outputModel }); ;
        }

        [HttpPost]
        [AllowAnonymous]
        public async Task<JsonResult> Login([FromBody] UserLoginModel user)
        {
            // 查询用户信息
            var data = await _userRepository.GetUserDetailByEmail(user.Email);

            // 账号不存在
            if (data == null)
            {
                return Json(new { Code = 200, Msg = "账号或密码错误" });
            }

            user.Password = Encrypt.Md5(data.Salt + user.Password);

            // 密码不一致
            if (!user.Password.Equals(data.Password))
            {
                return Json(new { Code = 200, Msg = "账号或密码错误" });
            }

            var userModel = _mapper.Map<UserModel>(data);

            // 生成token
            var token = GenerateJwtToken(userModel);

            // 存入Redis
            await new RedisHelper().StringSetAsync($"token:{data.Id}", token);

            return Json(new
            {
                Code = 200,
                Msg = "登录成功",
                Data = userModel,
                Token = token
            });
        }

        [HttpPost]
        [AllowAnonymous]
        public async Task<JsonResult> Register([FromBody] UserRegisterModel user)
        {
            // 查询用户信息
            var data = await _userRepository.GetUserDetailByEmail(user.Email);

            if (data != null)
            {
                return Json(new { Code = 200, Msg = "该邮箱已被注册" });
            }

            var salt = Guid.NewGuid().ToString("N");

            user.Password = Encrypt.Md5(salt + user.Password);

            var users = new Users
            {
                Email = user.Email,
                Password = user.Password,
                UserName = user.UserName
            };

            var model = _mapper.Map<Users>(user);

            model.Salt = salt;

            await _userRepository.AddUser(model);

            return Json(new { Code = 200, Msg = "注册成功" });
        }

        /// <summary>
        /// 生成Token
        /// </summary>
        /// <param name="user">用户信息</param>
        /// <returns></returns>
        private string GenerateJwtToken(UserModel user)
        {
            var securityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_config["Jwt:Key"]));
            var credentials = new SigningCredentials(securityKey, SecurityAlgorithms.HmacSha256);

            var claims = new[] {
                new Claim(JwtRegisteredClaimNames.Email, user.Email),
                new Claim(JwtRegisteredClaimNames.Gender, user.Gender.ToString()),
                new Claim(ClaimTypes.NameIdentifier,user.Id.ToString()),
                new Claim(ClaimTypes.Name,user.UserName),
                new Claim(ClaimTypes.MobilePhone,user.Mobile??""),
            };

            var token = new JwtSecurityToken(_config["Jwt:Issuer"],
                _config["Jwt:Issuer"],
                claims,
                expires: DateTime.Now.AddMinutes(120),
                signingCredentials: credentials);

            return new JwtSecurityTokenHandler().WriteToken(token);
        }
    }
}

sql复制代码#See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.

FROM mcr.microsoft.com/dotnet/aspnet:5.0-buster-slim AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:5.0-buster-slim AS build
WORKDIR /src
COPY ["CodeUin.WebApi/CodeUin.WebApi.csproj", "CodeUin.WebApi/"]
COPY ["CodeUin.Helpers/CodeUin.Helpers.csproj", "CodeUin.Helpers/"]
COPY ["CodeUin.Dapper/CodeUin.Dapper.csproj", "CodeUin.Dapper/"]
RUN dotnet restore "CodeUin.WebApi/CodeUin.WebApi.csproj"
COPY . .
WORKDIR "/src/CodeUin.WebApi"
RUN dotnet build "CodeUin.WebApi.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "CodeUin.WebApi.csproj" -c Release -o /app/publish

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "CodeUin.WebApi.dll"]

cmd复制代码# 在当前文件夹（末尾的句点）中查找 Dockerfile
docker build -t codeuin-api .
# 查看镜像
docker images
# 保存镜像到本地
docker save -o codeuin-api.tar codeuin-api

cmd复制代码# 加载镜像
docker load -i codeuin-api.tar
# 运行镜像
docker run -itd -p 8888:80 --name codeuin-api codeuin-api
# 查看运行状态
docker stats

ruby复制代码[root@localhost ~]#wget https:
//raw.githubusercontent.com/major/MySQLTuner-perl/master/mysqltuner.pl

ruby复制代码[root@localhost ~]# ./mysqltuner.pl --socket /var/lib/mysql/mysql.sock
>> MySQLTuner1.7.4- MajorHayden<major@mhtx.net>
>> Bug reports, feature requests, and downloads at http://mysqltuner.com/
>> Runwith'--help'for additional options and output filtering
[--] Skipped version check forMySQLTuner script
Please enter your MySQL administrative login: root
Please enter your MySQL administrative password: [OK] Currently running supported MySQL version 5.7.
[OK] Operating on 64-bit architecture

bash复制代码[root@localhost ~]#wget https:
//launchpad.net/mysql-tuning-primer/trunk/1.6-r1/+download/tuning-primer.sh

sql复制代码[root@localhost ~]# [root@localhost dba]# ./tuning-primer.sh

-- MYSQL PERFORMANCE TUNING PRIMER --
- By: MatthewMontgomery-

less复制代码[root@localhost ~]#wget https://www.percona.com/downloads/perconatoolkit/3.0.13/binary/redhat/7/x86_64/pecona-toolkit-3.0.13-re85ce15-el7-x86_64-bundle.tar
[root@localhost ~]#yum install percona-toolkit-3.0.13-1.el7.x86_64.rpm

css复制代码[root@localhost ~]# pt-variable-advisor localhost --socket /var/lib/mysql/mysql.sock

csharp复制代码[root@localhost ~]# pt-query-digest /var/lib/mysql/slowtest-slow.log

c复制代码pt-query-digest /var/lib/mysql/slowtest-slow.log > slow_report.log

c复制代码pt-query-digest --since=12h/var/lib/mysql/slowtest-slow.log > slow_report2.log

matlab复制代码pt-query-digest /var/lib/mysql/slowtest-slow.log --since '2017-01-07 09:30:00'--until'2017-01-07 10:00:00'> > slow_report3.log

c复制代码pt-query-digest --filter '$event->{fingerprint} =~ m/^select/i'/var/lib/mysql/slowtest-slow.log> slow_report4.log

c复制代码pt-query-digest --filter '($event->{user} || "") =~ m/^root/i'/var/lib/mysql/slowtest-slow.log> slow_report5.log

swift复制代码pt-query-digest --filter '(($event->{Full_scan} || "") eq "yes") ||(($event->{Full_join} || "") eq "yes")'/var/lib/mysql/slowtest-slow.log> slow_report6.log

scss复制代码sa-token的API调用非常简单，有多简单呢？以登录验证为例，你只需要：
// 在登录时写入当前会话的账号id 
StpUtil.setLoginId(10001);    
// 然后在任意需要校验登录处调用以下API  --- 如果当前会话未登录，这句代码会抛出 `NotLoginException`异常
StpUtil.checkLogin();    

如果上面的示例能够证明sa-token的简单，那么以下API则可以证明sa-token的强大

StpUtil.setLoginId(10001);          // 标记当前会话登录的账号id
StpUtil.getLoginId();               // 获取当前会话登录的账号id
StpUtil.isLogin();                  // 获取当前会话是否已经登录, 返回true或false
StpUtil.logout();                   // 当前会话注销登录
StpUtil.logoutByLoginId(10001);     // 让账号为10001的会话注销登录（踢人下线）
StpUtil.hasRole("super-admin");     // 查询当前账号是否含有指定角色标识, 返回true或false
StpUtil.hasPermission("user:add");  // 查询当前账号是否含有指定权限, 返回true或false
StpUtil.getSession();               // 获取当前账号id的Session 
StpUtil.getSessionByLoginId(10001); // 获取账号id为10001的Session
StpUtil.getTokenValueByLoginId(10001);  // 获取账号id为10001的token令牌值
StpUtil.setLoginId(10001, "PC");        // 指定设备标识登录
StpUtil.logoutByLoginId(10001, "PC");   // 指定设备标识进行强制注销 (不同端不受影响)
StpUtil.switchTo(10044);                // 将当前会话身份临时切换为其它账号

scss复制代码  StpUtil.setLoginId(Object loginId)
  标记当前会话登录的账号id
  建议的参数类型：long | int | String， 不可以传入复杂类型，如：User、Admin等等

  StpUtil.logout()
  当前会话注销登录

  StpUtil.isLogin()
  获取当前会话是否已经登录，返回true=已登录，false=未登录

  StpUtil.checkLogin()
  检验当前会话是否已经登录, 如果未登录，则抛出异常：NotLoginException
  扩展：NotLoginException 对象可通过 getLoginKey() 方法获取具体是哪个 StpLogic 抛出的异常
  扩展：NotLoginException 对象可通过 getType() 方法获取具体的场景值，详细参考章节：未登录场景值

  StpUtil.getLoginId()
  获取当前会话登录id, 如果未登录，则抛出异常：NotLoginException
  类似API还有：![](https://p6-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/86e5e3863c6740dabe03d44976540c92~tplv-k3u1fbpfcp-watermark.image)
  StpUtil.getLoginIdAsString() 获取当前会话登录id, 并转化为String类型
  StpUtil.getLoginIdAsInt() 获取当前会话登录id, 并转化为int类型
  StpUtil.getLoginIdAsLong() 获取当前会话登录id, 并转化为long类型

  StpUtil.getLoginId(T defaultValue)
  获取当前会话登录id, 如果未登录，则返回默认值 （defaultValue可以为任意类型）
  类似API还有：
  StpUtil.getLoginIdDefaultNull() 获取当前会话登录id, 如果未登录，则返回null

  StpUtil.getLoginIdByToken(String tokenValue)
  获取指定token对应的登录id，如果未登录，则返回 null

  StpUtil.getTokenName()
  获取当前StpLogic的token名称

html复制代码<h1>
    <h1><h1>
        <h1>
            <h1>
                <h1>
        <h1>
            <%
            System.out.println("hello")
            %>
            <h1>
                <h1>
   <h1><h1>
<h1>

xml复制代码<Connector port="8081" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8443" />

xml复制代码  <Host name="www.qinjiang.com"  appBase="webapps"
        unpackWARs="true" autoDeploy="true">

java复制代码--webapps ：Tomcat服务器的web目录
	-ROOT
	-kuangstudy ：网站的目录名
		- WEB-INF
			-classes : java程序
			-lib：web应用所依赖的jar包
			-web.xml ：网站配置文件
		- index.html 默认的首页
		- static 
            -css
            	-style.css
            -js
            -img
         -.....

java复制代码Request URL:https://www.baidu.com/   请求地址
Request Method:GET    get方法/post方法
Status Code:200 OK    状态码：200
Remote（远程） Address:14.215.177.39:443

java复制代码Accept:text/html  
Accept-Encoding:gzip, deflate, br
Accept-Language:zh-CN,zh;q=0.9    语言
Cache-Control:max-age=0
Connection:keep-alive

java复制代码Accept：告诉浏览器，它所支持的数据类型
Accept-Encoding：支持哪种编码格式  GBK   UTF-8   GB2312  ISO8859-1
Accept-Language：告诉浏览器，它的语言环境
Cache-Control：缓存控制
Connection：告诉浏览器，请求完成是断开还是保持连接
HOST：主机..../.

java复制代码Cache-Control:private    缓存控制
Connection:Keep-Alive    连接
Content-Encoding:gzip    编码
Content-Type:text/html   类型

java复制代码Accept：告诉浏览器，它所支持的数据类型
Accept-Encoding：支持哪种编码格式  GBK   UTF-8   GB2312  ISO8859-1
Accept-Language：告诉浏览器，它的语言环境
Cache-Control：缓存控制
Connection：告诉浏览器，请求完成是断开还是保持连接
HOST：主机..../.
Refresh：告诉客户端，多久刷新一次；
Location：让网页重新定位；

xml复制代码<mirror>
    <id>nexus-aliyun</id>  
    <mirrorOf>*,!jeecg,!jeecg-snapshots</mirrorOf>  
    <name>Nexus aliyun</name>  
    <url>http://maven.aliyun.com/nexus/content/groups/public</url> 
</mirror>

xml复制代码<localRepository>D:\Environment\apache-maven-3.6.2\maven-repo</localRepository>

xml复制代码<?xml version="1.0" encoding="UTF-8"?>

<!--Maven版本和头文件-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <!--这里就是我们刚才配置的GAV-->
  <groupId>com.kuang</groupId>
  <artifactId>javaweb-01-maven</artifactId>
  <version>1.0-SNAPSHOT</version>
  <!--Package：项目的打包方式
  jar：java应用
  war：JavaWeb应用
  -->
  <packaging>war</packaging>


  <!--配置-->
  <properties>
    <!--项目的默认构建编码-->
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <!--编码版本-->
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>

  <!--项目依赖-->
  <dependencies>
    <!--具体依赖的jar包配置文件-->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
    </dependency>
  </dependencies>

  <!--项目构建用的东西-->
  <build>
    <finalName>javaweb-01-maven</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

xml复制代码<!--在build中配置resources，来防止我们资源导出失败的问题-->
<build>
    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>true</filtering>
        </resource>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>true</filtering>
        </resource>
    </resources>
</build>

xml复制代码<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                      http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0"
         metadata-complete="true">



</web-app>

xml复制代码    <modules>
        <module>servlet-01</module>
    </modules>

xml复制代码    <parent>
        <artifactId>javaweb-02-servlet</artifactId>
        <groupId>com.kuang</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

java复制代码son extends father

xml复制代码    <!--注册Servlet-->
    <servlet>
        <servlet-name>hello</servlet-name>
        <servlet-class>com.kuang.servlet.HelloServlet</servlet-class>
    </servlet>
    <!--Servlet的请求路径-->
    <servlet-mapping>
        <servlet-name>hello</servlet-name>
        <url-pattern>/hello</url-pattern>
    </servlet-mapping>

xml复制代码    <servlet-mapping>
        <servlet-name>hello</servlet-name>
        <url-pattern>/hello</url-pattern>
    </servlet-mapping>

xml复制代码    <servlet-mapping>
        <servlet-name>hello</servlet-name>
        <url-pattern>/hello</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>hello</servlet-name>
        <url-pattern>/hello2</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>hello</servlet-name>
        <url-pattern>/hello3</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>hello</servlet-name>
        <url-pattern>/hello4</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>hello</servlet-name>
        <url-pattern>/hello5</url-pattern>
    </servlet-mapping>

xml复制代码    <servlet-mapping>
        <servlet-name>hello</servlet-name>
        <url-pattern>/hello/*</url-pattern>
    </servlet-mapping>

xml复制代码    <!--默认请求路径-->
    <servlet-mapping>
        <servlet-name>hello</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>

xml复制代码<!--可以自定义后缀实现请求映射
    注意点，*前面不能加项目映射的路径
    hello/sajdlkajda.qinjiang
    -->
<servlet-mapping>
    <servlet-name>hello</servlet-name>
    <url-pattern>*.qinjiang</url-pattern>
</servlet-mapping>

xml复制代码<!--404-->
<servlet>
    <servlet-name>error</servlet-name>
    <servlet-class>com.kuang.servlet.ErrorServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>error</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

java复制代码public class HelloServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        
        //this.getInitParameter()   初始化参数
        //this.getServletConfig()   Servlet配置
        //this.getServletContext()  Servlet上下文
        ServletContext context = this.getServletContext();

        String username = "秦疆"; //数据
        context.setAttribute("username",username); //将一个数据保存在了ServletContext中，名字为：username 。值 username

    }

}

java复制代码public class GetServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        ServletContext context = this.getServletContext();
        String username = (String) context.getAttribute("username");

        resp.setContentType("text/html");
        resp.setCharacterEncoding("utf-8");
        resp.getWriter().print("名字"+username);

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}

XML复制代码    <servlet>
        <servlet-name>hello</servlet-name>
        <servlet-class>com.kuang.servlet.HelloServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>hello</servlet-name>
        <url-pattern>/hello</url-pattern>
    </servlet-mapping>


    <servlet>
        <servlet-name>getc</servlet-name>
        <servlet-class>com.kuang.servlet.GetServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>getc</servlet-name>
        <url-pattern>/getc</url-pattern>
    </servlet-mapping>

xml复制代码    <!--配置一些web应用初始化参数-->
    <context-param>
        <param-name>url</param-name>
        <param-value>jdbc:mysql://localhost:3306/mybatis</param-value>
    </context-param>

java复制代码protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    ServletContext context = this.getServletContext();
    String url = context.getInitParameter("url");
    resp.getWriter().print(url);
}

java复制代码@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    ServletContext context = this.getServletContext();
    System.out.println("进入了ServletDemo04");
    //RequestDispatcher requestDispatcher = context.getRequestDispatcher("/gp"); //转发的请求路径
    //requestDispatcher.forward(req,resp); //调用forward实现请求转发；
    context.getRequestDispatcher("/gp").forward(req,resp);
}

properties复制代码username=root12312
password=zxczxczxc

java复制代码public class ServletDemo05 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        InputStream is = this.getServletContext().getResourceAsStream("/WEB-INF/classes/com/kuang/servlet/aa.properties");

        Properties prop = new Properties();
        prop.load(is);
        String user = prop.getProperty("username");
        String pwd = prop.getProperty("password");

        resp.getWriter().print(user+":"+pwd);

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}