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# SpringBoot整合MybatisPlus如何分解质因数
## 前言
在软件开发中,数学计算与持久化存储的结合是常见需求。本文将通过一个经典算法案例——**分解质因数**,演示如何在SpringBoot项目中整合MybatisPlus实现数据持久化。我们将从环境搭建、算法实现到数据库交互完整讲解。
## 一、环境准备
### 1.1 创建SpringBoot项目
使用Spring Initializr创建项目,勾选以下依赖:
- Spring Web
- MyBatis Framework
- MySQL Driver
```xml
<!-- pom.xml额外添加MybatisPlus依赖 -->
<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));
}
}
请求:
GET http://localhost:8080/api/factor/56
响应:
{
"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);
}
通过本案例我们实现了: 1. 经典算法的业务应用 2. MybatisPlus的CRUD操作 3. SpringBoot的自动配置整合 4. 数据库记录的自动化管理
完整项目已上传GitHub:项目链接
提示:实际开发中应考虑大数分解的性能优化,可采用Pollard’s Rho等高级算法。 “`
注:本文为示例文档,实际代码实现时需要: 1. 添加合适的异常处理 2. 考虑线程安全问题 3. 添加参数校验(如负数处理) 4. 根据实际数据库调整字段类型
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