Technology Testing and Tracking Human Resource Management
Article catalog
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- Foreword
- A project introduction
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- Introduction
- Functional structure diagram
- Technical selection
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- rear end
- front end
- Second technology points
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- Spring Security + JWT Realization Authorization
- AOP implementation record interface access log
- WebSocket protocol implements online chat
- Redis Cache Login Verification Code
- send email
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Foreword
This project is based on open source projectLittle rain / VHR in JiangnanFurther improvement.
A project introduction
Introduction
A corporate human resources management system, the main functions include employee personal information, salary management, department management, position management, and employee training, assessment, department transfer, reward punishment, system role is divided into administrator, personnel, personnel manager, different The role has different permissions, the administrator has all permissions, the personnel "has personnel management, employee information, salary administration, and the personnel manager is more than the department and position management authority than the personnel.
Functional structure diagram
Technical selection
rear end
| technology | illustrate | Version |
|---|---|---|
| SpringBoot | Container + MVC framework | 2.5.4 |
| Spring Security | Authentication and authorization framework | 5.5.2 |
| JWT | JSON WEB TOKEN | 0.9.0 |
| Mybatis | ORM framework | 3.4.6 |
| Mybatis-Generator | Data layer code generation | 1.3.3 |
| Mysql | database | 5.7 |
| Druid | Database connection pool | 1.2.0 |
| Redis | Distributed cache | 5.0.14 |
| FastJson | JSON tool | 1.2.3 |
| Jackson | JSON tool | 2.10.1 |
| Lombok | Simplified object package | 1.18.10 |
| Swagger-UI | Document generation tool | 3.0.0 |
| PageHelper | Page insert | 5.1.8 |
| Spring-Websocket | Real-time communication | 5.3.9 |
| Hibernator-Validator | Verification framework | 6.2.0 |
| JDk | Java development environment | 1.8 |
| Maven | Project management tool | 3.6.1 |
| Tomcat | Operating environment | 9.0 |
| Git | Version control tool | 2.32.0 |
| IDEA | development tools | 2021.1.3 |
| Postman | Interface test tool | 9.0 |
front end
| technology | illustrate | Version |
|---|---|---|
| Vue | Frontal frame | 2.6 |
| Vue-router | Routing framework | 3.0.7 |
| Vuex | Global Status Management Framework | 3.4.0 |
| ElementUI | Front end UI framework | 2.15 |
| Axios | Front end http framework | 0.21.3 |
| Echarts | Chart frame | 5.2.1 |
| JwChat | Chat component | 1.0.1 |
| Node.js | Operating environment | 12.18 |
| Vue/cli | Scaffolding tool | 4.5 |
| VS Code | development tools | 1.58 |
Second technology points
Spring Security + JWT Realization Authorization
Reference http://www.macrozheng.com/#/architect/mall_arch_04, http://www.macrozhen.com/#/architect/mall_arch_05
Problem: The backend needs to ensure the security of the interface access, you need to verify the identity of the requester and the judgment of whether it has this permission.
solve:
- When logging in, generate the token, return to the front, token contains the username, Token generating time and expiration time
- Each time the call interface needs the HTTP request head to add an Authorization field, save token
- The backend first judges whether or not the request header is present, and then determines if the expiration is expired, and then determine if the current user has corresponding privileges, and if there is, it is allowed to access, otherwise refuses access.
<! - Springsecurity Dependency Configuration -> <dependency > <groupId > org.springframework.boot </groupId > <artifactId > spring-boot-starter-security </artifactId > </dependency > <! - JWT (JSON Web token) Login Support -> <dependency > <groupId > io.jsonwebtoken </groupId > <artifactId > jjwt </artifactId > <version > 0.9.0 </version > </dependency > # Custom JWT Key jwt : tokenHeader : Authorization #JWT Storage request head secret : xxx #Jwt add key to use expiration : 604800 #JWT super-dead time (60 * 60 * 24) tokenHead : Bearer #JWT load getting started 
AOP implementation record interface access log
Reference http://www.macrozhenG.com/#/technology/AOP_LOG
Problem: If the code is added to each controller, then the code is redundant, and the service code cannot be decoupled.
Solve: Use the AOP to make a front and rear notification, the login interface is used for rear notification, increase, delete, and modify the front notification, implement the recording request client, request method, request parameters
<dependency > <groupId > org.aspectj </groupId > <artifactId > aspectjweaver </artifactId > <version > 1.8.13 </version > </dependency > 
WebSocket protocol implements online chat
Reference https://blog.csdn.net/qq_41603102/article/details/82492040, https://zhengkai.blog.csdn.net/Article/details/80275084
Question: Online chat requires a persistent connection, full duplex communication, if you use polling, network resources
Solve: Use the WebSocket protocol, once the connection is successful, you can keep communication until the connection is disconnected, it is very suitable for online chat.
<dependency > <groupId > org.springframework.boot </groupId > <artifactId > spring-boot-starter-websocket </artifactId > </dependency > 
Redis Cache Login Verification Code
Reference http://www.macrozhenG.com/#/architect/mall_arch_03
Question: After the verification code is sent to the front end, it is necessary to save so that the expiration time is set, and the time will be deleted. If you use mysql, read / write speed is slow.
Solve: Use Redis to make a cache, improve access speed
<dependency > <groupId > org.springframework.boot </groupId > <artifactId > spring-boot-starter-data-redis </artifactId > </dependency > spring : # redis configuration redis : host : localhost # Redis server address database : 0 # Redis database index (default is 0) port : 6379 # Redis server connection port password : # (Default is empty) jedis : pool : max-active : 8 # Maximum number of connections (no limit is limited) max-wait : -1ms # Connect the pool maximum blocking waiting time (no limit is used) max-idle : 8 # Connect the maximum idle connection in the pool min-idle : 0 # Connect the minimum idle connection in the pool timeout : 3000ms # Connection timeout (ms) # Custom Redis Key redis : key : prefix : authCode : "verifyCode:" expire : authCode : 120 # 
send email
Reference http://www.javaboy.org/2020/0101/springboot-mail.html
Question: When HR adds employees, send mail to newly entitled employees, and the email is in a certain format.
solve:
- Apply for an email client (I use QQ mailbox) authorization code
- Use thymeleaf as a mail template
- Use JavaMailsender to send mail
<dependency > <groupId > org.springframework.boot </groupId > <artifactId > spring-boot-starter-thymeleaf </artifactId > </dependency > <dependency > <groupId > org.springframework.boot </groupId > <artifactId > spring-boot-starter-mail </artifactId > </dependency > spring : mail : host : smtp.qq.com # Configure the SMTP server address port : 587 #SMTP server port username : xxx # Configure the mailbox user name password : xxx # Configure password, pay attention, not a real password, but the authorization code just applied default-encoding : utf- 8 # Default mail code properties : mail : smtp : socketFactoryClass : javax.net.ssl.SSLSocketFactory # Configure SSL encryption factory debug : false # Close Debug mode 
Technology Testing and Tracking Human Resource Management
Source: https://www.programmersought.com/article/44729899889/
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