第2讲投票系统后端架构搭建

news2025/1/24 22:36:35

创建项目时,随机选择一个,后面会生成配置properties文件

在这里插入图片描述

  • 生成文件
    在这里插入图片描述

maven-3.3.3

在这里插入图片描述

设置阿里云镜像

在这里插入图片描述

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

<!--
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
-->

<!--
 | This is the configuration file for Maven. It can be specified at two levels:
 |
 |  1. User Level. This settings.xml file provides configuration for a single user,
 |                 and is normally provided in ${user.home}/.m2/settings.xml.
 |
 |                 NOTE: This location can be overridden with the CLI option:
 |
 |                 -s /path/to/user/settings.xml
 |
 |  2. Global Level. This settings.xml file provides configuration for all Maven
 |                 users on a machine (assuming they're all using the same Maven
 |                 installation). It's normally provided in
 |                 ${maven.conf}/settings.xml.
 |
 |                 NOTE: This location can be overridden with the CLI option:
 |
 |                 -gs /path/to/global/settings.xml
 |
 | The sections in this sample file are intended to give you a running start at
 | getting the most out of your Maven installation. Where appropriate, the default
 | values (values used when the setting is not specified) are provided.
 |
 |-->
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
  <!-- localRepository
   | The path to the local repository maven will use to store artifacts.
   |
   | Default: ${user.home}/.m2/repository
  
  -->
<localRepository>D:\repository</localRepository>
  <!-- interactiveMode
   | This will determine whether maven prompts you when it needs input. If set to false,
   | maven will use a sensible default value, perhaps based on some other setting, for
   | the parameter in question.
   |
   | Default: true
  <interactiveMode>true</interactiveMode>
  -->

  <!-- offline
   | Determines whether maven should attempt to connect to the network when executing a build.
   | This will have an effect on artifact downloads, artifact deployment, and others.
   |
   | Default: false
  <offline>false</offline>
  -->

  <!-- pluginGroups
   | This is a list of additional group identifiers that will be searched when resolving plugins by their prefix, i.e.
   | when invoking a command line like "mvn prefix:goal". Maven will automatically add the group identifiers
   | "org.apache.maven.plugins" and "org.codehaus.mojo" if these are not already contained in the list.
   |-->
  <pluginGroups>
    <!-- pluginGroup
     | Specifies a further group identifier to use for plugin lookup.
    <pluginGroup>com.your.plugins</pluginGroup>
    -->
  </pluginGroups>

  <!-- proxies
   | This is a list of proxies which can be used on this machine to connect to the network.
   | Unless otherwise specified (by system property or command-line switch), the first proxy
   | specification in this list marked as active will be used.
   |-->
  <proxies>
    <!-- proxy
     | Specification for one proxy, to be used in connecting to the network.
     |
    <proxy>
      <id>optional</id>
      <active>true</active>
      <protocol>http</protocol>
      <username>proxyuser</username>
      <password>proxypass</password>
      <host>proxy.host.net</host>
      <port>80</port>
      <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
    </proxy>
    -->
  </proxies>

  <!-- servers
   | This is a list of authentication profiles, keyed by the server-id used within the system.
   | Authentication profiles can be used whenever maven must make a connection to a remote server.
   |-->
  <servers>
    <!-- server
     | Specifies the authentication information to use when connecting to a particular server, identified by
     | a unique name within the system (referred to by the 'id' attribute below).
     |
     | NOTE: You should either specify username/password OR privateKey/passphrase, since these pairings are
     |       used together.
     |
    <server>
      <id>deploymentRepo</id>
      <username>repouser</username>
      <password>repopwd</password>
    </server>
    -->

    <!-- Another sample, using keys to authenticate.
    <server>
      <id>siteServer</id>
      <privateKey>/path/to/private/key</privateKey>
      <passphrase>optional; leave empty if not used.</passphrase>
    </server>
    -->
  </servers>

  <!-- mirrors
   | This is a list of mirrors to be used in downloading artifacts from remote repositories.
   |
   | It works like this: a POM may declare a repository to use in resolving certain artifacts.
   | However, this repository may have problems with heavy traffic at times, so people have mirrored
   | it to several places.
   |
   | That repository definition will have a unique id, so we can create a mirror reference for that
   | repository, to be used as an alternate download site. The mirror site will be the preferred
   | server for that repository.
   |-->
 <mirrors>
    <mirror>
      <id>alimaven</id>
      <name>aliyun maven</name>
      <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
      <mirrorOf>central</mirrorOf>        
    </mirror>
  </mirrors>

  <!-- profiles
   | This is a list of profiles which can be activated in a variety of ways, and which can modify
   | the build process. Profiles provided in the settings.xml are intended to provide local machine-
   | specific paths and repository locations which allow the build to work in the local environment.
   |
   | For example, if you have an integration testing plugin - like cactus - that needs to know where
   | your Tomcat instance is installed, you can provide a variable here such that the variable is
   | dereferenced during the build process to configure the cactus plugin.
   |
   | As noted above, profiles can be activated in a variety of ways. One way - the activeProfiles
   | section of this document (settings.xml) - will be discussed later. Another way essentially
   | relies on the detection of a system property, either matching a particular value for the property,
   | or merely testing its existence. Profiles can also be activated by JDK version prefix, where a
   | value of '1.4' might activate a profile when the build is executed on a JDK version of '1.4.2_07'.
   | Finally, the list of active profiles can be specified directly from the command line.
   |
   | NOTE: For profiles defined in the settings.xml, you are restricted to specifying only artifact
   |       repositories, plugin repositories, and free-form properties to be used as configuration
   |       variables for plugins in the POM.
   |
   |-->
  <profiles>
    <!-- profile
     | Specifies a set of introductions to the build process, to be activated using one or more of the
     | mechanisms described above. For inheritance purposes, and to activate profiles via <activatedProfiles/>
     | or the command line, profiles have to have an ID that is unique.
     |
     | An encouraged best practice for profile identification is to use a consistent naming convention
     | for profiles, such as 'env-dev', 'env-test', 'env-production', 'user-jdcasey', 'user-brett', etc.
     | This will make it more intuitive to understand what the set of introduced profiles is attempting
     | to accomplish, particularly when you only have a list of profile id's for debug.
     |
     | This profile example uses the JDK version to trigger activation, and provides a JDK-specific repo.
    <profile>
      <id>jdk-1.4</id>

      <activation>
        <jdk>1.4</jdk>
      </activation>

      <repositories>
        <repository>
          <id>jdk14</id>
          <name>Repository for JDK 1.4 builds</name>
          <url>http://www.myhost.com/maven/jdk14</url>
          <layout>default</layout>
          <snapshotPolicy>always</snapshotPolicy>
        </repository>
      </repositories>
    </profile>
    -->

    <!--
     | Here is another profile, activated by the system property 'target-env' with a value of 'dev',
     | which provides a specific path to the Tomcat instance. To use this, your plugin configuration
     | might hypothetically look like:
     |
     | ...
     | <plugin>
     |   <groupId>org.myco.myplugins</groupId>
     |   <artifactId>myplugin</artifactId>
     |
     |   <configuration>
     |     <tomcatLocation>${tomcatPath}</tomcatLocation>
     |   </configuration>
     | </plugin>
     | ...
     |
     | NOTE: If you just wanted to inject this configuration whenever someone set 'target-env' to
     |       anything, you could just leave off the <value/> inside the activation-property.
     |
    <profile>
      <id>env-dev</id>

      <activation>
        <property>
          <name>target-env</name>
          <value>dev</value>
        </property>
      </activation>

      <properties>
        <tomcatPath>/path/to/tomcat/instance</tomcatPath>
      </properties>
    </profile>
    -->
  </profiles>

  <!-- activeProfiles
   | List of profiles that are active for all builds.
   |
  <activeProfiles>
    <activeProfile>alwaysActiveProfile</activeProfile>
    <activeProfile>anotherAlwaysActiveProfile</activeProfile>
  </activeProfiles>
  -->
</settings>

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.java1234</groupId>
    <artifactId>java1234-vote3</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>java1234-vote3</name>
    <description>java1234-vote3</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>


        <!-- 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>
        <!-- mybatis-plus -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.3.2</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.3.2</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.40</version>
        </dependency>

        <!-- JWT -->
        <dependency>
            <groupId>com.auth0</groupId>
            <artifactId>java-jwt</artifactId>
            <version>3.2.0</version>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.9.1</version>
        </dependency>

        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.5</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- spring boot redis 缓存引入 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <!-- lettuce pool 缓存连接池 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
        </dependency>

        <!-- hutool工具类-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.3.3</version>
        </dependency>

        <!-- 验证码依赖-->
        <dependency>
            <groupId>com.github.axet</groupId>
            <artifactId>kaptcha</artifactId>
            <version>0.0.9</version>
        </dependency>

        <!-- 添加Httpclient支持 -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.2</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.2.RELEASE</version>
            </plugin>
        </plugins>
    </build>

</project>

yml

server:
  port: 8866
  servlet:
    context-path: /

spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db_vote3?serverTimezone=Asia/Shanghai
    username: root
    password: 123456


mybatis-plus:
  global-config:
    db-config:
      id-type: auto
  configuration:
    map-underscore-to-camel-case: true
    auto-mapping-behavior: full
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  mapper-locations: classpath:mapper/*.xml

t_wxuserinfo.sql

/*
SQLyog Ultimate v11.33 (64 bit)
MySQL - 5.7.18-log 
*********************************************************************
*/
/*!40101 SET NAMES utf8 */;

create table `t_wxuserinfo` (
	`id` int (11),
	`openid` varchar (90),
	`nick_name` varchar (150),
	`avatar_url` varchar (600),
	`register_date` datetime ,
	`last_login_date` datetime ,
	`status` char (3)
); 
insert into `t_wxuserinfo` (`id`, `openid`, `nick_name`, `avatar_url`, `register_date`, `last_login_date`, `status`) values('6','o30ur5JpAsAUyGBkR0uW4IxvahR8','小锋老师@java1234','20230324082340000000882.jpeg','2023-02-27 17:48:29','2023-05-04 21:06:40','0');
insert into `t_wxuserinfo` (`id`, `openid`, `nick_name`, `avatar_url`, `register_date`, `last_login_date`, `status`) values('7','o30ur5PiPOr52bBsetXcIV93NL-U','小锋四号@java1234','20230410102248000000487.jpg','2023-04-10 10:21:30','2023-05-04 21:20:38','0');
insert into `t_wxuserinfo` (`id`, `openid`, `nick_name`, `avatar_url`, `register_date`, `last_login_date`, `status`) values('9','o30ur5JpAsAUyGBkR0uW4IxvahR0','微信用户','default.png','2023-04-30 07:42:19','2023-04-30 07:42:19','1');
insert into `t_wxuserinfo` (`id`, `openid`, `nick_name`, `avatar_url`, `register_date`, `last_login_date`, `status`) values('10','1',NULL,NULL,NULL,NULL,'1');
insert into `t_wxuserinfo` (`id`, `openid`, `nick_name`, `avatar_url`, `register_date`, `last_login_date`, `status`) values('11','2',NULL,NULL,NULL,NULL,'1');
insert into `t_wxuserinfo` (`id`, `openid`, `nick_name`, `avatar_url`, `register_date`, `last_login_date`, `status`) values('12','3',NULL,NULL,NULL,NULL,'1');
insert into `t_wxuserinfo` (`id`, `openid`, `nick_name`, `avatar_url`, `register_date`, `last_login_date`, `status`) values('13','4',NULL,NULL,NULL,NULL,'1');
insert into `t_wxuserinfo` (`id`, `openid`, `nick_name`, `avatar_url`, `register_date`, `last_login_date`, `status`) values('14','5',NULL,NULL,NULL,NULL,'1');
insert into `t_wxuserinfo` (`id`, `openid`, `nick_name`, `avatar_url`, `register_date`, `last_login_date`, `status`) values('15','6',NULL,NULL,NULL,NULL,'1');
insert into `t_wxuserinfo` (`id`, `openid`, `nick_name`, `avatar_url`, `register_date`, `last_login_date`, `status`) values('16','7',NULL,NULL,NULL,NULL,'1');
insert into `t_wxuserinfo` (`id`, `openid`, `nick_name`, `avatar_url`, `register_date`, `last_login_date`, `status`) values('17','8',NULL,NULL,NULL,NULL,'1');

WxUserInfo

package com.java1234.entity;

import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableName;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import lombok.Data;

import java.io.Serializable;
import java.util.Date;

/**
 * 微信用户信息实体
 * @author java1234_小锋
 * @site www.java1234.com
 * @company 南通小锋网络科技有限公司
 * @create 2022-01-08 15:59
 */
@TableName("t_wxUserInfo")
@Data
public class WxUserInfo implements Serializable {

    private Integer id; // 用户编号

    private String openid; // 用户唯一标识

    private String nickName="微信用户"; // 用户昵称

    private String avatarUrl="default.png"; // 用户头像图片的 URL

    @JsonSerialize(using=CustomDateTimeSerializer.class)
    private Date registerDate; // 注册日期

    @JsonSerialize(using=CustomDateTimeSerializer.class)
    private Date lastLoginDate; // 最后登录日期

    private String status; // 用户状态 状态 0 可用 1 封禁

    @TableField(select = false,exist = false)
    private String code; // 微信用户code 前端传来的


}

CustomDateTimeSerializer 自定义返回JSON 数据格式中日期格式化处理

package com.java1234.entity;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

/**
 * 自定义返回JSON 数据格式中日期格式化处理
 * @author java1234 小锋 老师
 *
 */
public class CustomDateTimeSerializer extends JsonSerializer<Date>{

	@Override
	public void serialize(Date value, JsonGenerator gen, SerializerProvider serializers)
			throws IOException {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		sdf.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));
		gen.writeString(sdf.format(value));  
	}

}

R.java返回数据的封装

package com.java1234.entity;

import java.util.HashMap;
import java.util.Map;

/**
 * 页面响应entity
 * @author java1234_小锋
 * @site www.java1234.com
 * @company Java知识分享网
 * @create 2019-08-13 上午 10:00
 */
public class R extends HashMap<String, Object> {

    private static final long serialVersionUID = 1L;

    public R() {
        put("code", 0);
    }

    public static R error() {
        return error(500, "未知异常,请联系管理员");
    }

    public static R error(String msg) {
        return error(500, msg);
    }

    public static R error(int code, String msg) {
        R r = new R();
        r.put("code", code);
        r.put("msg", msg);
        return r;
    }

    public static R ok(String msg) {
        R r = new R();
        r.put("msg", msg);
        return r;
    }

    public static R ok(Map<String, Object> map) {
        R r = new R();
        r.putAll(map);
        return r;
    }

    public static R ok() {
        return new R();
    }

    public R put(String key, Object value) {
        super.put(key, value);
        return this;
    }
}

启动类加上,扫描mapper接口:@MapperScan(“com.java1234.mapper”)

package com.java1234;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.java1234.mapper")
public class Java1234Vote3Application {

    public static void main(String[] args) {
        SpringApplication.run(Java1234Vote3Application.class, args);
    }

}

* 微信用户Mapper接口

package com.java1234.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.java1234.entity.WxUserInfo;

/**
 * 微信用户Mapper接口
 */
public interface WxUserInfoMapper extends BaseMapper<WxUserInfo> {
}

IWxUserInfoService

package com.java1234.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.java1234.entity.WxUserInfo;

/**
 * 微信用户Service接口
 */
public interface IWxUserInfoService extends IService<WxUserInfo> {
}

IWxUserInfoServiceImpl

package com.java1234.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.java1234.entity.WxUserInfo;
import com.java1234.mapper.WxUserInfoMapper;
import com.java1234.service.IWxUserInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * 微信用户Service实现类
 * @author java1234_小锋 (公众号:java1234)
 * @site www.java1234.vip
 * @company 南通小锋网络科技有限公司
 */
@Service("wxUserInfoService")
public class IWxUserInfoServiceImpl extends ServiceImpl<WxUserInfoMapper, WxUserInfo> implements IWxUserInfoService {

    @Autowired
    private WxUserInfoMapper wxUserInfoMapper;
}

MybatisPlusConfig 分页配置

package com.java1234.config;

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * MybatisPlus配置类
 * @author java1234_小锋
 * @site www.java1234.com
 * @company 南通小锋网络科技有限公司
 * @create 2022-01-30 8:10
 */
@Configuration
public class MybatisPlusConfig {

    @Bean
    public PaginationInterceptor paginationInterceptor(){
        return new PaginationInterceptor();
    }
}

WeixinUserController

package com.java1234.controller;

import com.baomidou.mybatisplus.extension.api.R;
import com.java1234.entity.WxUserInfo;
import com.java1234.service.IWxUserInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.List;

@RequestMapping("/user")
@RestController
public class WeixinUserController {

    @Autowired
    private IWxUserInfoService wxUserInfoService;


    /**
     * 测试
     * @return
     */
    @RequestMapping("/test")
    public R test(){
        List<WxUserInfo> list= wxUserInfoService.list();
        HashMap<String,Object> result=new HashMap<>();
        result.put("list",list);
        return R.ok(result);
    }
}

本文来自互联网用户投稿,该文观点仅代表作者本人,不代表本站立场。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如若转载,请注明出处:http://www.coloradmin.cn/o/1446152.html

如若内容造成侵权/违法违规/事实不符,请联系多彩编程网进行投诉反馈,一经查实,立即删除!

相关文章

助力智能化农田作物除草,基于轻量级YOLOv8n开发构建农田作物场景下玉米苗、杂草检测识别分析系统

在我们前面的系列博文中&#xff0c;关于田间作物场景下的作物、杂草检测已经有过相关的开发实践了&#xff0c;结合智能化的设备可以实现只能除草等操作&#xff0c;玉米作物场景下的杂草检测我们则少有涉及&#xff0c;这里本文的主要目的就是想要基于最新的YOLOv8下最轻量级…

【开源】JAVA+Vue.js实现高校学院网站

目录 一、摘要1.1 项目介绍1.2 项目录屏 二、功能模块2.1 学院院系模块2.2 竞赛报名模块2.3 教育教学模块2.4 招生就业模块2.5 实时信息模块 三、系统设计3.1 用例设计3.2 数据库设计3.2.1 学院院系表3.2.2 竞赛报名表3.2.3 教育教学表3.2.4 招生就业表3.2.5 实时信息表 四、系…

Kafka 入门介绍

目录 一. 前言 二. 使用场景 三. 分布式的流平台 四. Kafka 的基本术语 4.1. 主题和日志 &#xff08;Topic 和 Log&#xff09; 4.2. 分布式&#xff08;Distribution&#xff09; 4.3. 异地数据同步技术&#xff08;Geo-Replication&#xff09; 4.4. 生产者&#xf…

2.2-学成在线内容管理之课程分类查询+新增课程

文章目录 内容管理模块4 课程分类查询4.1 需求分析4.2 接口定义4.3 接口开发4.3.1 树型表查询4.3.2 开发Mapper 4.4 接口测试4.4.1 接口层代码完善4.4.2 测试接口 5 新增课程5.1 需求分析5.1.1 业务流程4.1.2 数据模型 5.2 接口定义5.3 接口开发5.3.1 保存课程基本信息5.3.2 保…

ZigBee学习——BDB

✨本博客参考了善学坊的教程&#xff0c;并总结了在实现过程中遇到的问题。 善学坊官网 文章目录 一、BDB简介二、BDB Commissioning Modes2.1 Network Steering2.2 Network Formation2.3 Finding and Binding&#xff08;F & B&#xff09;2.4 Touchlink 三、BDB Commissi…

【linux系统体验】-ubuntu简易折腾

ubuntu 一、终端美化二、桌面美化2.1 插件安装2.2 主题和图标2.3 美化配置 三、常用命令 以后看不看不重要&#xff0c;咱就是想记点儿东西。一、终端美化 安装oh my posh&#xff0c;参考链接&#xff1a;Linux 终端美化 1、安装字体 oh my posh美化工具可以使用合适的字体&a…

深入浅出CChart 每日一课——红花当然配绿叶,CChart辅助图形绘制

各位同学&#xff0c;好久不见&#xff0c;我可想死你们了&#xff01;&#xff01;&#xff01;咦&#xff0c;那位不是巩叔吗&#xff1f;不好意思&#xff0c;侵权了&#xff0c;请多担待_。 前面的课程呢&#xff0c;拓展的内容比较多&#xff0c;最近笨笨想聚焦在CChart本…

微服务多级缓存

多级缓存 1.什么是多级缓存 传统的缓存策略一般是请求到达Tomcat后&#xff0c;先查询Redis&#xff0c;如果未命中则查询数据库&#xff0c;如图&#xff1a; 存在下面的问题&#xff1a; •请求要经过Tomcat处理&#xff0c;Tomcat的性能成为整个系统的瓶颈 •Redis缓存…

Structured Streaming

目录 一、概述 &#xff08;一&#xff09;基本概念 &#xff08;二&#xff09;两种处理模型 &#xff08;三&#xff09;Structured Streaming和Spark SQL、Spark Streaming关系 二、编写Structured Streaming程序的基本步骤 &#xff08;一&#xff09;实现步骤 &…

jsp计算机线上教学系统Myeclipse开发mysql数据库web结构java编程计算机网页项目

一、源码特点 JSP 计算机线上教学系统是一套完善的java web信息管理系统&#xff0c;对理解JSP java编程开发语言有帮助&#xff0c;系统具有完整的源代码和数据库&#xff0c;系统主要采用B/S模式开发。开发环境为 TOMCAT7.0,Myeclipse8.5开发&#xff0c;数据库为Mysql5…

WebSocketServer方法里注入不了其他类

请直接看原文: WebSocketServer无法注入其他对象的问题 - 知乎 (zhihu.com) WebSocket服务无法使用自动注入解决方法_websocket sever不可以直接注入吧-CSDN博客 ------------------------------------------------------------------------------------------------------…

2.11日学习打卡----初学RocketMQ(二)

2.11日学习打卡 一. RocketMQ整合springboot 首先配置pom.xml文件 <dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><scope>annotationProcessor</scope></dependency><dependency>…

Java图形化界面编程——处理位图 笔记

2.8.3 处理位图 ​ 如果仅仅绘制一些简单的几何图形&#xff0c;程序的图形效果依然比较单调 。 AWT 也允许在组件上绘制位图&#xff0c; Graphics 提供了 drawlmage() 方法用于绘制位图&#xff0c;该方法需要一个Image参数一一代表位图&#xff0c;通过该方法就可 以绘制出…

苹果Mac键盘如何将 F1 到 F12 取消按Fn

苹果电脑安装了Win10操作系统之后&#xff0c;F1到F12用不了怎么办的解决方法。本文将介绍一些解决方法&#xff0c;帮助您解决无法使用F1到F12功能键的问题。 使用 Mac系统的人都知道&#xff0c;Mac系统默认是没有开启 F1-F12 的使用的&#xff0c;平时我们使用的系统都可以使…

【C语言】实现双向链表

目录 &#xff08;一&#xff09;头文件 &#xff08;二&#xff09; 功能实现 &#xff08;1&#xff09;初始化 &#xff08;2&#xff09;打印链表 &#xff08;3&#xff09; 头插与头删 &#xff08;4&#xff09;尾插与尾删 &#xff08;5&#xff09;指定位置之后…

降噪和音频修复 iZotope RX 7 Advanced

iZotope RX 7 Advanced 是一款功能强大的音频修复和增强软件&#xff0c;它能够帮助用户轻松应对各种音频问题&#xff0c;提供全面的工具和技术来优化和改善音频质量。 首先&#xff0c;iZotope RX 7 Advanced 具有出色的降噪功能。无论是背景噪音、杂音还是其他干扰因素&…

【Java EE初阶十二】网络编程TCP/IP协议(二)

1. 关于TCP 1.1 TCP 的socket api tcp的socket api和U大片的socket api差异很大&#xff0c;但是和前面所讲的文件操作很密切的联系 下面主要讲解两个关键的类&#xff1a; 1、ServerSocket&#xff1a;给服务器使用的类&#xff0c;使用这个类来绑定端口号 2、Socket&#xf…

服务治理中间件-Eureka

目录 简介 搭建Eureka服务 注册服务到Eureka 简介 Eureka是Spring团队开发的服务治理中间件&#xff0c;可以轻松在项目中&#xff0c;实现服务的注册与发现&#xff0c;相比于阿里巴巴的Nacos、Apache基金会的Zookeeper&#xff0c;更加契合Spring项目&#xff0c;缺点就是…

论文阅读:《Deep Learning-Based Human Pose Estimation: A Survey》——Part 1:2D HPE

目录 人体姿态识别概述 论文框架 HPE分类 人体建模模型 二维单人姿态估计 回归方法 目前发展 优化 基于热图的方法 基于CNN的几个网络 利用身体结构信息提供构建HPE网络 视频序列中的人体姿态估计 2D多人姿态识别 方法 自上而下 自下而上 2D HPE 总结 数据集…