一个基于Spring Boot的简单网吧管理系统

一个基于Spring Boot的简单网吧管理系统的案例代码。这个系统包括用户管理、电脑管理、上机记录管理等功能。代码结构清晰，适合初学者学习和参考。

1. 项目结构

src/main/java/com/example/netbarmanagement
    ├── controller
    │   ├── ComputerController.java
    │   ├── UserController.java
    │   └── RecordController.java
    ├── model
    │   ├── Computer.java
    │   ├── User.java
    │   └── Record.java
    ├── repository
    │   ├── ComputerRepository.java
    │   ├── UserRepository.java
    │   └── RecordRepository.java
    ├── service
    │   ├── ComputerService.java
    │   ├── UserService.java
    │   └── RecordService.java
    └── NetbarManagementApplication.java

2. 依赖配置 (pom.xml)

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-validation</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

3. 实体类 (model 包)

Computer.java

package com.example.netbarmanagement.model;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class Computer {
   
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private boolean isOccupied;

    // Getters and Setters
    public Long getId() {
   
        return id;
    }

    public void setId(Long id) {
   
        this.id = id;
    }

    public String getName() {
   
        return name;
    }

    public void setName(String name) {
   
        this.name = name;
    }

    public boolean isOccupied() {
   
        return isOccupied;
    }

    public void setOccupied(boolean occupied) {
   
        isOccupied = occupied;
    }
}

User.java

package com.example.netbarmanagement.model;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class