SPR-16154 - Correctly handle NVARCHAR, LONGNVARCHAR and NCLOBs

spring-jdbc/src/main/java/org/springframework/jdbc/core/StatementCreatorUtils.java

@@ -295,10 +295,12 @@ public abstract class StatementCreatorUtils {
 		else if (inValue instanceof SqlValue) {
 			((SqlValue) inValue).setValue(ps, paramIndex);
 		}
-		else if (sqlType == Types.VARCHAR || sqlType == Types.NVARCHAR ||
-				sqlType == Types.LONGVARCHAR || sqlType == Types.LONGNVARCHAR) {
+		else if (sqlType == Types.VARCHAR || sqlType == Types.LONGVARCHAR ) {
 			ps.setString(paramIndex, inValue.toString());
 		}
+		else if (sqlType == Types.NVARCHAR || sqlType == Types.LONGNVARCHAR) {
+			ps.setNString(paramIndex, inValue.toString());
+		}
 		else if ((sqlType == Types.CLOB || sqlType == Types.NCLOB) && isStringValue(inValue.getClass())) {
 			String strVal = inValue.toString();
 			if (strVal.length() > 4000) {
@@ -312,8 +314,15 @@ public abstract class StatementCreatorUtils {
 				}
 				return;
 			}
-			// Fallback: regular setString binding
-			ps.setString(paramIndex, strVal);
+			else {
+				// Fallback: setString or setNString binding
+				if (sqlType == Types.NCLOB) {
+					ps.setNString(paramIndex, strVal);
+				}
+				else {
+					ps.setString(paramIndex, strVal);
+				}
+			}
 		}
 		else if (sqlType == Types.DECIMAL || sqlType == Types.NUMERIC) {
 			if (inValue instanceof BigDecimal) {