Fix: StringListConverter에서 JSON 이중 인코딩 문제 해결

Author: sso0om

back/src/main/java/com/back/global/converter/StringListConverter.java

@@ -1,23 +1,52 @@
 package com.back.global.converter;
 
-import com.back.standard.util.Ut;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import jakarta.persistence.AttributeConverter;
 import jakarta.persistence.Converter;
 import org.springframework.stereotype.Component;
 
+import java.util.ArrayList;
 import java.util.List;
 
 @Converter
 @Component
 public class StringListConverter implements AttributeConverter<List<String>, String> {
 
+    private static final ObjectMapper objectMapper = new ObjectMapper();
+
     @Override
     public String convertToDatabaseColumn(List<String> attribute) {
-        return attribute == null ? null : Ut.json.toString(attribute);
+        if (attribute == null || attribute.isEmpty()) {
+            return null;
+        }
+        try {
+            return objectMapper.writeValueAsString(attribute);
+        } catch (JsonProcessingException e) {
+            throw new IllegalArgumentException("JSON 변환 실패", e);
+        }
     }
 
     @Override
     public List<String> convertToEntityAttribute(String dbData) {
-        return Ut.json.toList(dbData, String.class);
+        if (dbData == null || dbData.trim().isEmpty()) {
+            return new ArrayList<>();
+        }
+        try {
+            // 이중 인코딩된 경우 처리
+            String data = dbData;
+            if (data.startsWith("\"") && data.endsWith("\"")) {
+                data = objectMapper.readValue(data, String.class);
+            }
+
+            return objectMapper.readValue(
+                data,
+                objectMapper.getTypeFactory().constructCollectionType(List.class, String.class)
+            );
+        } catch (JsonProcessingException e) {
+            System.err.println("JSON 파싱 실패. 원본 데이터: " + dbData);
+            e.printStackTrace();
+            return new ArrayList<>();
+        }
     }
 }