use linkedhashmap to preserve the order of columns while parsing recordset to list

Author: PramodKumarYadav

src/main/java/com/powertester/database/DBConnection.java

@@ -13,7 +13,7 @@
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.ArrayList;
-import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import lombok.extern.slf4j.Slf4j;
@@ -124,7 +124,7 @@ private static List<Map<String, String>> getResultListFromResultSet(ResultSet re
     ResultSetMetaData metaData = resultSet.getMetaData();
     int columnCount = metaData.getColumnCount();
     while (resultSet.next()) {
-      Map<String, String> row = new HashMap<>();
+      Map<String, String> row = new LinkedHashMap<>();
       for (int i = 1; i <= columnCount; i++) {
         row.put(metaData.getColumnName(i), resultSet.getString(i));
       }
@@ -148,7 +148,7 @@ public Map<String, String> runStoredProcedure(String sql, String... outputParame
       statement.execute();
 
       // Get output parameters
-      Map<String, String> resultMap = new HashMap<>();
+      Map<String, String> resultMap = new LinkedHashMap<>();
       for (String outputParameter : outputParameters) {
         resultMap.put(outputParameter, statement.getString(outputParameter));
       }

src/test/resources/data/tc01-new-customers/expected.csv

@@ -1,4 +1,4 @@
-GENDER,ID,LAST_NAME,FIRST_NAME,AGE
-Male,1,Doe,John,30
-Female,2,Smith,Jane,25
-Male,3,Brown,Alex,28
+ID,FIRST_NAME,LAST_NAME,AGE,GENDER
+1,John,Doe,30,Male
+2,Jane,Smith,25,Female
+3,Alex,Brown,28,Male