2.5 java作业评分功能学习

今天编写了评估系统作业的第二个功能：评分以及等级划分
后端部分代码如下：
controller层：

@RestController
@Slf4j
@RequestMapping("/ass")
public class AssessmentController {@Autowiredprivate AssessmentService assessmentService;@PostMapping("/add1")public Result add_1(@RequestBody Assessment assessment){log.info("添加表b1:{}",assessment);assessmentService.add_1(assessment);return Result.success(assessment);}

service：

public interface AssessmentService {void add_1(Assessment assessment);

impl：

@Service
public class AssessmentServiceImpl implements AssessmentService {@Autowiredprivate AssessmentMapper assessmentMapper;@Overridepublic void add_1(Assessment assessment) {assessmentMapper.add_1(assessment);}
}

mapper：

@Mapper
public interface AssessmentMapper {@Insert("insert into elder.assessment (id,name, score_b1,rank_b1) values (#{id},#{name},#{score_b1},#{rank_b1})")void add_1(Assessment assessment);
}

今天学习了javaweb中如何根据单选框计算分数，单选框中value的值是字符串类型，无法直接相加，但可以使用一元加号“+”将value变为数字类型使用，如下列代码：

const feed = document.querySelectorAll('input[name=feed]');let f;feed.forEach(radio => {if (radio.checked) {// 使用一元加法运算符将字符串转换为数字f = +radio.value;}});

还要注意在JavaScript中const类型是必须要有初始值的，而let类型则不需要，可根据需求选择