diff --git a/webmagic-extension/src/main/java/us/codecraft/webmagic/model/PageModelExtractor.java b/webmagic-extension/src/main/java/us/codecraft/webmagic/model/PageModelExtractor.java
index b7b7900..3f92b28 100644
--- a/webmagic-extension/src/main/java/us/codecraft/webmagic/model/PageModelExtractor.java
+++ b/webmagic-extension/src/main/java/us/codecraft/webmagic/model/PageModelExtractor.java
@@ -76,9 +76,21 @@ class PageModelExtractor {
     }
 
     private void checkFormat(Field field, FieldExtractor fieldExtractor) {
+        //check custom formatter
+        Formatter formatter = field.getAnnotation(Formatter.class);
+        if (formatter != null && !formatter.formatter().equals(ObjectFormatter.class)) {
+            if (formatter != null) {
+                if (!formatter.formatter().equals(ObjectFormatter.class)) {
+                    ObjectFormatter objectFormatter = initFormatter(formatter.formatter());
+                    objectFormatter.initParam(formatter.value());
+                    fieldExtractor.setObjectFormatter(objectFormatter);
+                    return;
+                }
+            }
+        }
         if (!fieldExtractor.isMulti() && !String.class.isAssignableFrom(field.getType())) {
             Class<?> fieldClazz = BasicTypeFormatter.detectBasicClass(field.getType());
-            ObjectFormatter objectFormatter = getObjectFormatter(field, fieldClazz);
+            ObjectFormatter objectFormatter = getObjectFormatter(field, fieldClazz, formatter);
             if (objectFormatter == null) {
                 throw new IllegalStateException("Can't find formatter for field " + field.getName() + " of type " + fieldClazz);
             } else {
@@ -88,10 +100,9 @@ class PageModelExtractor {
             if (!List.class.isAssignableFrom(field.getType())) {
                 throw new IllegalStateException("Field " + field.getName() + " must be list");
             }
-            Formatter formatter = field.getAnnotation(Formatter.class);
             if (formatter != null) {
                 if (!formatter.subClazz().equals(Void.class)) {
-                    ObjectFormatter objectFormatter = getObjectFormatter(field, formatter.subClazz());
+                    ObjectFormatter objectFormatter = getObjectFormatter(field, formatter.subClazz(), formatter);
                     if (objectFormatter == null) {
                         throw new IllegalStateException("Can't find formatter for field " + field.getName() + " of type " + formatter.subClazz());
                     } else {
@@ -102,14 +113,7 @@ class PageModelExtractor {
         }
     }
 
-    private ObjectFormatter getObjectFormatter(Field field, Class<?> fieldClazz) {
-        Formatter formatter = field.getAnnotation(Formatter.class);
-        if (formatter != null) {
-            if (!formatter.formatter().equals(ObjectFormatter.class)) {
-                ObjectFormatter objectFormatter = initFormatter(formatter.formatter());
-                objectFormatter.initParam(formatter.value());
-            }
-        }
+    private ObjectFormatter getObjectFormatter(Field field, Class<?> fieldClazz, Formatter formatter) {
         return initFormatter(ObjectFormatters.get(fieldClazz));
     }
 
diff --git a/webmagic-samples/src/main/java/us/codecraft/webmagic/model/samples/GithubRepo.java b/webmagic-samples/src/main/java/us/codecraft/webmagic/model/samples/GithubRepo.java
index e8998ec..57de3f1 100644
--- a/webmagic-samples/src/main/java/us/codecraft/webmagic/model/samples/GithubRepo.java
+++ b/webmagic-samples/src/main/java/us/codecraft/webmagic/model/samples/GithubRepo.java
@@ -3,11 +3,9 @@ package us.codecraft.webmagic.model.samples;
 import us.codecraft.webmagic.Site;
 import us.codecraft.webmagic.model.HasKey;
 import us.codecraft.webmagic.model.OOSpider;
-import us.codecraft.webmagic.model.annotation.ExtractBy;
-import us.codecraft.webmagic.model.annotation.ExtractByUrl;
-import us.codecraft.webmagic.model.annotation.HelpUrl;
-import us.codecraft.webmagic.model.annotation.TargetUrl;
+import us.codecraft.webmagic.model.annotation.*;
 import us.codecraft.webmagic.pipeline.JsonFilePageModelPipeline;
+import us.codecraft.webmagic.samples.formatter.StringTemplateFormatter;
 import us.codecraft.webmagic.scheduler.FileCacheQueueScheduler;
 
 import java.util.List;
@@ -22,6 +20,7 @@ public class GithubRepo implements HasKey {
     @ExtractBy(value = "//h1[@class='entry-title public']/strong/a/text()", notNull = true)
     private String name;
 
+    @Formatter(value = "author%s",formatter = StringTemplateFormatter.class)
     @ExtractByUrl("https://github\\.com/(\\w+)/.*")
     private String author;
 
diff --git a/webmagic-samples/src/main/java/us/codecraft/webmagic/samples/formatter/StringTemplateFormatter.java b/webmagic-samples/src/main/java/us/codecraft/webmagic/samples/formatter/StringTemplateFormatter.java
new file mode 100644
index 0000000..7b38125
--- /dev/null
+++ b/webmagic-samples/src/main/java/us/codecraft/webmagic/samples/formatter/StringTemplateFormatter.java
@@ -0,0 +1,26 @@
+package us.codecraft.webmagic.samples.formatter;
+
+import us.codecraft.webmagic.model.formatter.ObjectFormatter;
+
+/**
+ * @author yihua.huang@dianping.com
+ */
+public class StringTemplateFormatter implements ObjectFormatter<String> {
+
+    private String template;
+
+    @Override
+    public String format(String raw) throws Exception {
+        return String.format(template, raw);
+    }
+
+    @Override
+    public Class<String> clazz() {
+        return String.class;
+    }
+
+    @Override
+    public void initParam(String[] extra) {
+        template = extra[0];
+    }
+}