feat: 完成了动态sql

src/main/java/com/seecoder/BlueWhale/repository/ProductRepository.java

@@ -1,18 +1,12 @@
 package com.seecoder.BlueWhale.repository;
 
-import com.seecoder.BlueWhale.enums.CategoryEnum;
 import com.seecoder.BlueWhale.po.Product;
+import org.springframework.data.jpa.repository.JpaRepository;
 
 import java.util.List;
-import org.springframework.data.jpa.repository.JpaRepository;
-import org.springframework.data.jpa.repository.Query;
 
 public interface ProductRepository extends JpaRepository<Product, Integer> {
     List<Product> findAllByStoreId(Integer storeId);
 
     Product findByStoreIdAndName(Integer storeId,String name);
-
-    @Query("SELECT * FROM Product WHERE 1=1")
-    List<Product> findProductsWithDynamicConditions(String condition, String name,
-                                                    CategoryEnum category,Double price);
 }

src/main/java/com/seecoder/BlueWhale/serviceImpl/ProductServiceImpl.java

@@ -1,21 +1,21 @@
 package com.seecoder.BlueWhale.serviceImpl;
 
 import com.seecoder.BlueWhale.enums.CategoryEnum;
-import com.seecoder.BlueWhale.repository.ProductRepository;
-import com.seecoder.BlueWhale.repository.StoreRepository;
 import com.seecoder.BlueWhale.exception.BlueWhaleException;
 import com.seecoder.BlueWhale.po.Product;
 import com.seecoder.BlueWhale.po.Store;
+import com.seecoder.BlueWhale.repository.ProductRepository;
+import com.seecoder.BlueWhale.repository.StoreRepository;
 import com.seecoder.BlueWhale.service.ProductService;
 import com.seecoder.BlueWhale.vo.ProductVO;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
 
-import java.util.ArrayList;
+import javax.persistence.EntityManager;
+import javax.persistence.Query;
 import java.util.List;
 import java.util.stream.Collectors;
 
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Service;
-
 @Service
 public class ProductServiceImpl implements ProductService {
 
@@ -25,6 +25,9 @@ public class ProductServiceImpl implements ProductService {
     @Autowired
     StoreRepository storeRepository;
 
+    @Autowired
+    EntityManager entityManager;
+
     @Override
     public Boolean create(ProductVO productVO) {
         if (productRepository.findByStoreIdAndName(productVO.getStoreId(),productVO.getName())!=null){
@@ -70,18 +73,21 @@ public class ProductServiceImpl implements ProductService {
 
     @Override
     public List<ProductVO> getProductsWithCondition(String name, CategoryEnum category, Double price) {
-        List<String> conditions=new ArrayList<>();
+        String condition="SELECT * FROM Product WHERE 1=1";
         if (name!=null && name.length()>0){
-            conditions.add("name = :name");
+            condition=condition.concat("AND name = :name");
         }
         if (category!=null){
-            conditions.add("category = :category");
+            condition=condition.concat("AND category = :category");
         }
         if (price!=null && price>0){
-            conditions.add("price <= :price");
+            condition=condition.concat("AND price <= :price");
         }
-        String condition=String.join(",",conditions);
-        List<Product> products=productRepository.findProductsWithDynamicConditions(condition,name,category,price);
+        Query query=entityManager.createQuery(condition);
+        query.setParameter("name",name);
+        query.setParameter("category",category);
+        query.setParameter("price",price);
+        List<Product> products=query.getResultList();
         return products.stream().map(Product::toVO).collect(Collectors.toList());
     }
 }