Kan 15 db

demo/src/main/java/com/example/demo/entity/Transaction.java

@@ -0,0 +1,27 @@
+package com.example.demo.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+
+@Entity
+@Getter
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
+public class Transaction {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private String gu;
+    private String dong;
+    private String road;
+    private String houseType;
+    private Double totalArea;
+    private Double landArea;
+    private Integer buildYear;
+    private Integer tradeYear;
+    private Integer tradeMonth;
+    private Integer tradeDay;
+    private Long price;
+}

demo/src/main/java/com/example/demo/repository/TransactionRepository.java

@@ -0,0 +1,9 @@
+package com.example.demo.repository;
+
+import com.example.demo.entity.Transaction;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface TransactionRepository extends JpaRepository<Transaction, Long> {
+}

demo/src/main/java/com/example/demo/service/CsvImportService.java

@@ -0,0 +1,44 @@
+package com.example.demo.service;
+
+import com.example.demo.entity.Transaction;
+import com.example.demo.repository.TransactionRepository;
+import jakarta.annotation.PostConstruct;
+import lombok.RequiredArgsConstructor;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.stereotype.Service;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+
+@Service
+@RequiredArgsConstructor
+public class CsvImportService {
+    private final TransactionRepository transactionRepository;
+
+    @PostConstruct
+    public void init() {
+        try {
+            ClassPathResource resource = new ClassPathResource("transactions.csv");
+            BufferedReader reader = new BufferedReader(
+                new InputStreamReader(resource.getInputStream(), StandardCharsets.UTF_8)
+            );
+            reader.readLine();
+            String line;
+            while ((line = reader.readLine()) != null) {
+                String[] s = line.split(",");
+                Transaction t = Transaction.builder()
+                    .gu(s[0]).dong(s[1]).road(s[2]).houseType(s[3])
+                    .totalArea(Double.parseDouble(s[4]))
+                    .landArea(Double.parseDouble(s[5]))
+                    .buildYear(Integer.parseInt(s[6]))
+                    .tradeYear(Integer.parseInt(s[7]))
+                    .tradeMonth(Integer.parseInt(s[8]))
+                    .tradeDay(Integer.parseInt(s[9]))
+                    .price(Long.parseLong(s[10]))
+                    .build();
+                transactionRepository.save(t);
+            }
+            System.out.println("✅ DB 적재 완료!");
+        } catch (Exception e) { e.printStackTrace(); }
+    }
+}

demo/src/main/resources/application.properties

@@ -1 +1,4 @@
 spring.application.name=demo
+spring.datasource.url=jdbc:h2:mem:testdb
+spring.h2.console.enabled=true
+spring.jpa.hibernate.ddl-auto=create

demo/src/main/resources/transactions.csv

@@ -0,0 +1,3 @@
+gu,dong,road,houseType,totalArea,landArea,buildYear,tradeYear,tradeMonth,tradeDay,price
+수지구,풍덕천동,수지로,다가구,84,120,2010,2025,5,10,52000
+기흥구,신갈동,신갈로,아파트,59,0,2005,2025,5,11,41000