fix code

hutool-core/src/main/java/cn/hutool/core/convert/impl/StringConverter.java

@@ -35,7 +35,7 @@ public class StringConverter extends AbstractConverter {
 	 * @param stringFunction 序列化函数
 	 * @return this
 	 */
-	public StringConverter putStringer(Class<?> clazz, Function<Object, String> stringFunction){
+	public StringConverter putStringer(final Class<?> clazz, final Function<Object, String> stringFunction){
 		if(null == stringer){
 			stringer = new HashMap<>();
 		}

hutool-db/src/test/java/cn/hutool/db/DbTest.java

@@ -55,6 +55,19 @@ public class DbTest {
 		Assert.assertEquals(1, page1.size());
 	}
 
+	@Test
+	public void pageBySqlWithInTest() {
+		// in和其他条件混用
+		final String sql = "select * from user where age > :age and name in (:names) order by name";
+		// 测试数据库中一共4条数据，第0页有3条，第1页有1条
+		final List<Entity> page0 = Db.of().page(
+				sql, Page.of(0, 3),
+				Entity.of().set("age", 12)
+						.set("names", new String[]{"张三", "王五"})
+		);
+		Assert.assertEquals(1, page0.size());
+	}
+
 	@Test
 	public void pageWithParamsTest() {
 		final String sql = "select * from user where name = ?";