diff --git a/src/main/java/com/alibaba/fastjson/parser/DefaultJSONParser.java b/src/main/java/com/alibaba/fastjson/parser/DefaultJSONParser.java
index d17b87ad5..2df0d5b22 100755
--- a/src/main/java/com/alibaba/fastjson/parser/DefaultJSONParser.java
+++ b/src/main/java/com/alibaba/fastjson/parser/DefaultJSONParser.java
@@ -446,6 +446,10 @@ public class DefaultJSONParser extends AbstractJSONParser implements Closeable {
                 } else {
                     lexer.nextToken();
                     value = parse();
+                    
+                    if (object.getClass() == JSONObject.class) {
+                        key = key.toString();
+                    }
                     object.put(key, value);
 
                     if (lexer.token() == JSONToken.RBRACE) {
diff --git a/src/test/java/com/alibaba/json/bvt/bug/Bug_for_zengjie.java b/src/test/java/com/alibaba/json/bvt/bug/Bug_for_zengjie.java
new file mode 100644
index 000000000..ec6514450
--- /dev/null
+++ b/src/test/java/com/alibaba/json/bvt/bug/Bug_for_zengjie.java
@@ -0,0 +1,12 @@
+package com.alibaba.json.bvt.bug;
+
+import junit.framework.TestCase;
+
+import com.alibaba.fastjson.JSON;
+
+
+public class Bug_for_zengjie extends TestCase {
+    public void test_0 () throws Exception {
+        JSON.parse("{123:'abc','value':{123:'abc'}}");
+    }
+}
diff --git a/src/test/java/com/alibaba/json/bvt/serializer/PrePropertyFilterTest.java b/src/test/java/com/alibaba/json/bvt/serializer/PrePropertyFilterTest.java
new file mode 100644
index 000000000..0e919414c
--- /dev/null
+++ b/src/test/java/com/alibaba/json/bvt/serializer/PrePropertyFilterTest.java
@@ -0,0 +1,30 @@
+package com.alibaba.json.bvt.serializer;
+
+import junit.framework.TestCase;
+
+import org.junit.Assert;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.serializer.JSONSerializer;
+import com.alibaba.fastjson.serializer.PropertyPreFilter;
+
+public class PrePropertyFilterTest extends TestCase {
+
+    public void test_0() throws Exception {
+        class VO {
+            public int getId() { throw new RuntimeException(); }
+        }
+
+        PropertyPreFilter filter = new PropertyPreFilter () {
+            public boolean apply(JSONSerializer serializer, Object source, String name) {
+                return false;
+            }
+        };
+
+        VO vo = new VO();
+
+        String text = JSON.toJSONString(vo, filter);
+        Assert.assertEquals("{}", text);
+    }
+
+}
diff --git a/src/test/java/com/alibaba/json/bvt/serializer/PropertyFilterTest2.java b/src/test/java/com/alibaba/json/bvt/serializer/PropertyFilterTest2.java
new file mode 100644
index 000000000..651f3c214
--- /dev/null
+++ b/src/test/java/com/alibaba/json/bvt/serializer/PropertyFilterTest2.java
@@ -0,0 +1,33 @@
+package com.alibaba.json.bvt.serializer;
+
+import junit.framework.TestCase;
+
+import org.junit.Assert;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.serializer.PropertyFilter;
+
+public class PropertyFilterTest2 extends TestCase {
+
+    public void test_0() throws Exception {
+        class VO {
+            public int    id;
+            public String name;
+        }
+
+        PropertyFilter filter = new PropertyFilter() {
+
+            public boolean apply(Object source, String name, Object value) {
+                return "id".equals(name);
+            }
+        };
+
+        VO vo = new VO();
+        vo.id = 123;
+        vo.name = "gaotie";
+
+        String text = JSON.toJSONString(vo, filter);
+        Assert.assertEquals("{\"id\":123}", text);
+    }
+
+}