feat: validate product factors step three

src/main/java/com/sztzjy/linkCommerce/entity/dto/ProductDevelopmentFactorsStepThreeValidationRequest.java

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+package com.sztzjy.linkCommerce.entity.dto;
+
+import java.util.List;
+
+public class ProductDevelopmentFactorsStepThreeValidationRequest {
+    private List<Row> factors;
+
+    public List<Row> getFactors() { return factors; }
+    public void setFactors(List<Row> factors) { this.factors = factors; }
+
+    public static class Row {
+        private String dimension;
+        private String successAnalysis;
+        private String failedAnalysis;
+
+        public String getDimension() { return dimension; }
+        public void setDimension(String value) { dimension = value; }
+        public String getSuccessAnalysis() { return successAnalysis; }
+        public void setSuccessAnalysis(String value) { successAnalysis = value; }
+        public String getFailedAnalysis() { return failedAnalysis; }
+        public void setFailedAnalysis(String value) { failedAnalysis = value; }
+    }
+}

src/main/java/com/sztzjy/linkCommerce/entity/dto/ProductDevelopmentFactorsStepThreeValidationResult.java

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+package com.sztzjy.linkCommerce.entity.dto;
+
+public class ProductDevelopmentFactorsStepThreeValidationResult {
+    private boolean valid;
+    private String message;
+
+    public boolean isValid() { return valid; }
+    public void setValid(boolean value) { valid = value; }
+    public String getMessage() { return message; }
+    public void setMessage(String value) { message = value; }
+}

src/main/java/com/sztzjy/linkCommerce/service/ProductDevelopmentFactorsStepThreeService.java

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+package com.sztzjy.linkCommerce.service;
+
+import com.sztzjy.linkCommerce.config.security.JwtUser;
+import com.sztzjy.linkCommerce.entity.dto.ProductDevelopmentFactorsStepThreeValidationRequest;
+import com.sztzjy.linkCommerce.entity.dto.ProductDevelopmentFactorsStepThreeValidationResult;
+
+public interface ProductDevelopmentFactorsStepThreeService {
+    ProductDevelopmentFactorsStepThreeValidationResult validate(ProductDevelopmentFactorsStepThreeValidationRequest request, JwtUser user);
+}

src/main/java/com/sztzjy/linkCommerce/service/impl/ProductDevelopmentFactorsStepThreeServiceImpl.java

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+package com.sztzjy.linkCommerce.service.impl;
+
+import com.sztzjy.linkCommerce.config.exception.handler.ServiceException;
+import com.sztzjy.linkCommerce.config.security.JwtUser;
+import com.sztzjy.linkCommerce.entity.dto.ProductDevelopmentFactorsStepThreeValidationRequest;
+import com.sztzjy.linkCommerce.entity.dto.ProductDevelopmentFactorsStepThreeValidationResult;
+import com.sztzjy.linkCommerce.service.ProductDevelopmentFactorsStepThreeService;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+
+import java.util.Arrays;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+@Service
+public class ProductDevelopmentFactorsStepThreeServiceImpl implements ProductDevelopmentFactorsStepThreeService {
+    private static final Set<String> DIMENSIONS = new LinkedHashSet<>(Arrays.asList("供应链与成本控制", "商业模式", "市场反馈"));
+
+    @Override
+    public ProductDevelopmentFactorsStepThreeValidationResult validate(ProductDevelopmentFactorsStepThreeValidationRequest request, JwtUser user) {
+        if (user == null || StringUtils.isBlank(user.getUserId())) throw new ServiceException(HttpStatus.UNAUTHORIZED, "请先登录后再提交");
+        if (user.getRoleId() != 4) throw new ServiceException(HttpStatus.FORBIDDEN, "仅学生可提交实训答案");
+        if (request == null || request.getFactors() == null || request.getFactors().size() != DIMENSIONS.size()) {
+            throw badRequest("请完成供应链与成本控制、商业模式和市场反馈分析");
+        }
+
+        Set<String> submitted = new LinkedHashSet<>();
+        for (ProductDevelopmentFactorsStepThreeValidationRequest.Row row : request.getFactors()) {
+            String dimension = row == null ? "" : StringUtils.trimToEmpty(row.getDimension());
+            if (!DIMENSIONS.contains(dimension) || !submitted.add(dimension)) throw badRequest("提交的分析维度不完整或重复");
+            if (!StringUtils.isNotBlank(row.getSuccessAnalysis())) throw badRequest("请填写" + dimension + "的成功产品分析");
+            if (!StringUtils.isNotBlank(row.getFailedAnalysis())) throw badRequest("请填写" + dimension + "的失败产品分析");
+        }
+        if (!submitted.equals(DIMENSIONS)) throw badRequest("请完成供应链与成本控制、商业模式和市场反馈分析");
+
+        ProductDevelopmentFactorsStepThreeValidationResult result = new ProductDevelopmentFactorsStepThreeValidationResult();
+        result.setValid(true);
+        result.setMessage("校验通过");
+        return result;
+    }
+
+    private ServiceException badRequest(String message) { return new ServiceException(HttpStatus.BAD_REQUEST, message); }
+}

src/test/java/com/sztzjy/linkCommerce/service/impl/ProductDevelopmentFactorsStepThreeServiceImplTest.java

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+package com.sztzjy.linkCommerce.service.impl;
+
+import com.sztzjy.linkCommerce.config.exception.handler.ServiceException;
+import com.sztzjy.linkCommerce.config.security.JwtUser;
+import com.sztzjy.linkCommerce.entity.dto.ProductDevelopmentFactorsStepThreeValidationRequest;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class ProductDevelopmentFactorsStepThreeServiceImplTest {
+    @Test
+    void acceptsCompleteStudentAnalyses() {
+        assertTrue(new ProductDevelopmentFactorsStepThreeServiceImpl().validate(valid(), student()).isValid());
+    }
+
+    @Test
+    void rejectsBlankOrForgedAnalyses() {
+        ProductDevelopmentFactorsStepThreeServiceImpl service = new ProductDevelopmentFactorsStepThreeServiceImpl();
+        ProductDevelopmentFactorsStepThreeValidationRequest blank = valid();
+        blank.getFactors().get(2).setFailedAnalysis(" ");
+        assertThrows(ServiceException.class, () -> service.validate(blank, student()));
+        ProductDevelopmentFactorsStepThreeValidationRequest forged = valid();
+        forged.getFactors().get(2).setDimension("伪造维度");
+        assertThrows(ServiceException.class, () -> service.validate(forged, student()));
+    }
+
+    @Test
+    void rejectsNonStudent() {
+        assertThrows(ServiceException.class, () -> new ProductDevelopmentFactorsStepThreeServiceImpl().validate(valid(), teacher()));
+    }
+
+    private ProductDevelopmentFactorsStepThreeValidationRequest valid() {
+        ProductDevelopmentFactorsStepThreeValidationRequest request = new ProductDevelopmentFactorsStepThreeValidationRequest();
+        request.setFactors(Arrays.asList(
+                row("供应链与成本控制", "成本可控且供应稳定", "关键器件单一供应"),
+                row("商业模式", "订阅服务形成闭环", "盈利模式不清晰"),
+                row("市场反馈", "用户留存高且复购稳定", "退货率高且反馈差")
+        ));
+        return request;
+    }
+
+    private ProductDevelopmentFactorsStepThreeValidationRequest.Row row(String dimension, String success, String failed) {
+        ProductDevelopmentFactorsStepThreeValidationRequest.Row row = new ProductDevelopmentFactorsStepThreeValidationRequest.Row();
+        row.setDimension(dimension);
+        row.setSuccessAnalysis(success);
+        row.setFailedAnalysis(failed);
+        return row;
+    }
+
+    private JwtUser student() { JwtUser user = new JwtUser(); user.setUserId("stu-1"); user.setRoleId(4); return user; }
+    private JwtUser teacher() { JwtUser user = new JwtUser(); user.setUserId("tea-1"); user.setRoleId(2); return user; }
+}