Java充值币分为限时和永久,何如设计后端接口以及对应实体类
时间: 2024-10-26 10:16:19 浏览: 21
在设计Java充值系统的后端接口及对应实体类时,我们可以创建两个主要类:`CoinType` 和 `CoinPurchase`。针对限时和永久两种类型的充值币,我们可以这样做:
1. **CoinType实体类(Coins.java)**:
```java
public enum CoinType {
LIMITED_TIME("限时", 0), PERMANENT("永久", 1);
private String name;
private int duration;
CoinType(String name, int duration) {
this.name = name;
this.duration = duration;
}
public String getName() {
return name;
}
public int getDuration() {
return duration;
}
}
```
这个枚举类包含了两种类型的名称和对应的特性(如期限)。
2. **CoinPurchase实体类(CoinPurchase.java)**:
```java
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class CoinPurchase {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private Double amount;
private CoinType coinType;
private User user; // 用户对象关联
// 构造函数, getter和setter
public CoinPurchase(double amount, CoinType coinType, User user) {
this.amount = amount;
this.coinType = coinType;
this.user = user;
}
// 添加方法获取类型名
public String getCoinTypeName() {
return coinType.getName();
}
}
```
这里我们假设`User`是一个自定义实体,代表用户对象。`CoinPurchase`实体包含充值金额、币种类型、用户以及可能的购买时间戳等字段。
后端接口(如RestController)可以这样设计:
```java
@RestController
@RequestMapping("/coins")
public class CoinController {
@PostMapping("/purchase")
public ResponseEntity<CoinPurchase> purchaseCoin(@RequestBody CoinPurchaseRequest request) {
// ... 验证请求,处理购买逻辑
CoinPurchase coinPurchase = handlePurchase(request.getAmount(), request.getCoinType(), request.getUser());
return ResponseEntity.ok(coinPurchase);
}
private CoinPurchase handlePurchase(Double amount, CoinType coinType, User user) {
// 实现具体的购买逻辑,包括数据库操作和计费服务调用
}
}
// 请求体模型
public class CoinPurchaseRequest {
private Double amount;
private CoinType coinType;
private User user;
// ... getters and setters
}
```
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