bug fixed for toJSON

src/main/java/com/alibaba/fastjson/JSON.java

@@ -525,7 +525,10 @@ public abstract class JSON implements JSONStreamAware, JSONAware {
             
             JSONObject json = new JSONObject();
             try {
-                javaBeanSerializer.getFieldValues(javaObject, json);
+                Map<String, Object> values = javaBeanSerializer.getFieldValuesMap(javaObject);
+                for (Map.Entry<String, Object> entry : values.entrySet()) {
+                    json.put(entry.getKey(), toJSON(entry.getValue()));
+                }
             } catch (Exception e) {
                 throw new JSONException("toJSON error", e);
             }

src/main/java/com/alibaba/fastjson/serializer/JavaBeanSerializer.java

@@ -22,6 +22,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.IdentityHashMap;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -602,9 +603,13 @@ public class JavaBeanSerializer implements ObjectSerializer {
         }
     }
 
-    public void getFieldValues(Object object, Map<String, Object> outMap) throws Exception {
+    public Map<String, Object> getFieldValuesMap(Object object) throws Exception {
+        Map<String, Object> map = new LinkedHashMap<String, Object>(sortedGetters.length);
+        
         for (FieldSerializer getter : sortedGetters) {
-            outMap.put(getter.fieldInfo.name, getter.getPropertyValue(object));
+            map.put(getter.fieldInfo.name, getter.getPropertyValue(object));
         }
+        
+        return map;
     }
 }