customize getFields() to return ordered Field Object

src/main/java/com/alibaba/fastjson/util/DeserializeBeanInfo.java

@@ -6,11 +6,7 @@
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.lang.reflect.Type;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
@@ -106,6 +102,31 @@ public boolean add(FieldInfo field) {
         return true;
     }
 
+    private static List<Field> getOrderedFields(Class clz) {
+        Set<Field> visited = new HashSet<Field>();
+        List<Field> fields = new ArrayList<Field>();
+        findField0(fields, visited, clz);
+        return fields;
+    }
+
+    private static void findField0(List<Field> fields, Set<Field> visited, Class<?> clz) {
+        if (clz == null) {
+            return;
+        }
+        for (Field f : clz.getDeclaredFields()) {
+            if (Modifier.isPrivate(f.getModifiers())) {
+                continue;
+            }
+            if (visited.add(f)) {
+                fields.add(f);
+            }
+        }
+        findField0(fields, visited, clz.getSuperclass());
+        for (Class<?> i : clz.getInterfaces()) {
+            findField0(fields, visited, i);
+        }
+    }
+
     public static DeserializeBeanInfo computeSetters(Class<?> clazz, Type type) {
         DeserializeBeanInfo beanInfo = new DeserializeBeanInfo(clazz);
 
@@ -273,7 +294,7 @@ public static DeserializeBeanInfo computeSetters(Class<?> clazz, Type type) {
             TypeUtils.setAccessible(method);
         }
 
-        for (Field field : clazz.getFields()) {
+        for (Field field : getOrderedFields(clazz)) {
             if (Modifier.isStatic(field.getModifiers())) {
                 continue;
             }

src/test/java/com/alibaba/json/test/DupFileNameTest.java

@@ -0,0 +1,39 @@
+package com.alibaba.json.test;
+
+
+import com.alibaba.fastjson.JSON;
+import junit.framework.TestCase;
+import org.junit.Assert;
+
+/**
+ * 在小米4/c, android-4.4.4；华为P6 android-4.2.2, 会出现反序列化不稳定的问题
+ */
+public class DupFileNameTest extends TestCase {
+
+    public static class A extends B {
+        public String extra;
+    }
+
+    public static class B {
+        public String extra;
+
+        public String getB() {
+            return extra;
+        }
+    }
+
+    public static class C extends B {
+        public String extra;
+    }
+
+    public void test() {
+
+        String text = "{extra:\"s\"}";
+
+        A a = JSON.parseObject(text, A.class);
+        C c = JSON.parseObject(text, C.class);
+
+        Assert.assertEquals(a.getB(), c.getB());
+    }
+
+}