# SpringBoot整合MybatisPlus如何分解質因數
## 前言
在軟件開發中,數學計算與持久化存儲的結合是常見需求。本文將通過一個經典算法案例——**分解質因數**,演示如何在SpringBoot項目中整合MybatisPlus實現數據持久化。我們將從環境搭建、算法實現到數據庫交互完整講解。
## 一、環境準備
### 1.1 創建SpringBoot項目
使用Spring Initializr創建項目,勾選以下依賴:
- Spring Web
- MyBatis Framework
- MySQL Driver
```xml
<!-- pom.xml額外添加MybatisPlus依賴 -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.5.3.1</version>
</dependency>
# application.yml
spring:
datasource:
url: jdbc:mysql://localhost:3306/factor_db?useSSL=false
username: root
password: 123456
driver-class-name: com.mysql.cj.jdbc.Driver
mybatis-plus:
configuration:
log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
public class PrimeFactorization {
public static List<Integer> factorize(int num) {
List<Integer> factors = new ArrayList<>();
if (num < 2) return factors;
for (int i = 2; i <= Math.sqrt(num); i++) {
while (num % i == 0) {
factors.add(i);
num /= i;
}
}
if (num > 1) factors.add(num);
return factors;
}
}
@Data
@TableName("t_factor_result")
public class FactorResult {
@TableId(type = IdType.AUTO)
private Long id;
private Integer originalNumber;
private String factors;
private LocalDateTime createTime;
}
public interface FactorResultMapper extends BaseMapper<FactorResult> {
}
@Service
public class FactorService {
@Autowired
private FactorResultMapper mapper;
public void saveFactorization(int number) {
List<Integer> factors = PrimeFactorization.factorize(number);
FactorResult result = new FactorResult();
result.setOriginalNumber(number);
result.setFactors(factors.toString());
result.setCreateTime(LocalDateTime.now());
mapper.insert(result);
}
}
@RestController
@RequestMapping("/api/factor")
public class FactorController {
@Autowired
private FactorService factorService;
@GetMapping("/{number}")
public Result factorize(@PathVariable int number) {
factorService.saveFactorization(number);
return Result.success(PrimeFactorization.factorize(number));
}
}
請求:
GET http://localhost:8080/api/factor/56
響應:
{
"code": 200,
"data": [2, 2, 2, 7]
}
@GetMapping("/history")
public Page<FactorResult> getHistory(
@RequestParam(defaultValue = "1") int page,
@RequestParam(defaultValue = "10") int size) {
return factorService.page(new Page<>(page, size));
}
@Scheduled(cron = "0 0 3 * * ?")
public void cleanOldRecords() {
QueryWrapper<FactorResult> wrapper = new QueryWrapper<>();
wrapper.lt("create_time", LocalDateTime.now().minusMonths(1));
mapper.delete(wrapper);
}
通過本案例我們實現了: 1. 經典算法的業務應用 2. MybatisPlus的CRUD操作 3. SpringBoot的自動配置整合 4. 數據庫記錄的自動化管理
完整項目已上傳GitHub:項目鏈接
提示:實際開發中應考慮大數分解的性能優化,可采用Pollard’s Rho等高級算法。 “`
注:本文為示例文檔,實際代碼實現時需要: 1. 添加合適的異常處理 2. 考慮線程安全問題 3. 添加參數校驗(如負數處理) 4. 根據實際數據庫調整字段類型
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