NamedParameterUtils.isParameterSeparator checks for non-ASCII characters

Issue: SPR-16472

spring-jdbc/src/main/java/org/springframework/jdbc/core/namedparam/NamedParameterUtils.java

@@ -391,7 +391,7 @@ public abstract class NamedParameterUtils {
 	 * that is, whether the given character qualifies as a separator.
 	 */
 	private static boolean isParameterSeparator(char c) {
-		return (separatorIndex[c] || Character.isWhitespace(c));
+		return (c < 128 && separatorIndex[c]) || Character.isWhitespace(c);
 	}
 
 	/**

spring-jdbc/src/test/java/org/springframework/jdbc/core/namedparam/NamedParameterUtilsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -52,11 +52,11 @@ public class NamedParameterUtilsTests {
 		assertEquals(2, psql2.getTotalParameterCount());
 		assertEquals(1, psql2.getNamedParameterCount());
 
-		String sql3 = "xxx &a+:b" + '\t' + ":c%10 yyyy ? zzzzz";
+		String sql3 = "xxx &ä+:ö" + '\t' + ":ü%10 yyyy ? zzzzz";
 		ParsedSql psql3 = NamedParameterUtils.parseSqlStatement(sql3);
-		assertEquals("a", psql3.getParameterNames().get(0));
-		assertEquals("b", psql3.getParameterNames().get(1));
-		assertEquals("c", psql3.getParameterNames().get(2));
+		assertEquals("ä", psql3.getParameterNames().get(0));
+		assertEquals("ö", psql3.getParameterNames().get(1));
+		assertEquals("ü", psql3.getParameterNames().get(2));
 	}
 
 	@Test