fix kotlin support, for issue #3288

core/src/main/java/com/alibaba/fastjson2/util/BeanUtils.java

@@ -1297,6 +1297,10 @@ public static String getterName(Method method, boolean kotlin, String namingStra
         }
 
         String fieldName = getterName(methodName, namingStrategy);
+        int subIndex;
+        if (kotlin && (subIndex = fieldName.indexOf('-')) != -1) {
+            fieldName = fieldName.substring(0, subIndex);
+        }
 
         if (fieldName.length() > 2
                 && fieldName.charAt(0) >= 'A' && fieldName.charAt(0) <= 'Z'

kotlin/src/test/kotlin/com/alibaba/fastjson2/issues/Issue3288.kt

@@ -0,0 +1,27 @@
+package com.alibaba.fastjson2.issues
+
+import com.alibaba.fastjson2.JSON
+import com.alibaba.fastjson2.toJSONString
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+
+class Issue3288 {
+    @JvmInline
+    value class TestBean(val a: Int)
+
+    data class Test2(
+        val b: TestBean
+    )
+
+    @Test
+    fun test() {
+        val s1 = "{\"a\":1}"
+        assertEquals(s1, TestBean(1).toJSONString())
+        assertEquals(s1, JSON.parseObject(s1, TestBean::class.java).toJSONString())
+        assertEquals(s1, TestBean(1).toJSONString())
+        val s2 = "{\"b\":2}"
+        assertEquals(s2, JSON.parseObject(s2, Test2::class.java)
+            .toJSONString())
+        assertEquals(s2, JSON.parseObject(s2, Test2::class.java).toJSONString())
+    }
+}