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 876c48a..db5326b 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
@@ -83,14 +83,13 @@ class PageModelExtractor {
             return;
         }
         if (!formatter.formatter().equals(Formatter.DEFAULT_FORMATTER)) {
-            ObjectFormatter objectFormatter = initFormatter(formatter.formatter());
-            objectFormatter.initParam(formatter.value());
+            ObjectFormatter objectFormatter = initFormatter(formatter.formatter(), 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, formatter);
+            ObjectFormatter objectFormatter = initFormatter(ObjectFormatters.get(fieldClazz), formatter.value());
             if (objectFormatter == null) {
                 throw new IllegalStateException("Can't find formatter for field " + field.getName() + " of type " + fieldClazz);
             } else {
@@ -100,30 +99,22 @@ class PageModelExtractor {
             if (!List.class.isAssignableFrom(field.getType())) {
                 throw new IllegalStateException("Field " + field.getName() + " must be list");
             }
-            if (formatter != null) {
-                if (!formatter.subClazz().equals(Void.class)) {
-                    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 {
-                        fieldExtractor.setObjectFormatter(objectFormatter);
-                    }
+            if (!formatter.subClazz().equals(Void.class)) {
+                ObjectFormatter objectFormatter = initFormatter(ObjectFormatters.get(formatter.subClazz()), formatter.value());
+                if (objectFormatter == null) {
+                    throw new IllegalStateException("Can't find formatter for field " + field.getName() + " of type " + formatter.subClazz());
+                } else {
+                    fieldExtractor.setObjectFormatter(objectFormatter);
                 }
             }
         }
     }
 
-    private ObjectFormatter getObjectFormatter(Field field, Class<?> fieldClazz, Formatter formatter) {
-        ObjectFormatter objectFormatter = initFormatter(ObjectFormatters.get(fieldClazz));
-        if(formatter != null && formatter.value() != null){
-          objectFormatter.initParam(formatter.value());
-        }
-        return objectFormatter;
-    }
-
-    private ObjectFormatter initFormatter(Class<? extends ObjectFormatter> formatterClazz) {
+    private ObjectFormatter initFormatter(Class<? extends ObjectFormatter> formatterClazz, String[] params) {
         try {
-            return formatterClazz.newInstance();
+            ObjectFormatter objectFormatter = formatterClazz.newInstance();
+            objectFormatter.initParam(params);
+            return objectFormatter;
         } catch (InstantiationException e) {
             throw new RuntimeException(e);
         } catch (IllegalAccessException e) {
diff --git a/webmagic-extension/src/test/java/us/codecraft/webmagic/model/GithubRepoApi.java b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/GithubRepoApi.java
new file mode 100644
index 0000000..3750645
--- /dev/null
+++ b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/GithubRepoApi.java
@@ -0,0 +1,18 @@
+package us.codecraft.webmagic.model;
+
+import us.codecraft.webmagic.model.annotation.ExtractBy;
+
+/**
+ * @author code4crafter@gmail.com
+ *         Date: 2017/6/3
+ *         Time: 下午9:07
+ */
+public class GithubRepoApi {
+
+    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.name",source = ExtractBy.Source.RawText)
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+}
diff --git a/webmagic-extension/src/test/java/us/codecraft/webmagic/model/GithubRepoTest.java b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/GithubRepoTest.java
index 1f3b2df..632dd86 100644
--- a/webmagic-extension/src/test/java/us/codecraft/webmagic/model/GithubRepoTest.java
+++ b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/GithubRepoTest.java
@@ -1,12 +1,11 @@
 package us.codecraft.webmagic.model;
 
 import org.junit.Test;
-import us.codecraft.webmagic.SimpleHttpClient;
 import us.codecraft.webmagic.Site;
 import us.codecraft.webmagic.Task;
 import us.codecraft.webmagic.downloader.MockGithubDownloader;
-import us.codecraft.webmagic.pipeline.PageModelPipeline;
 import us.codecraft.webmagic.example.GithubRepo;
+import us.codecraft.webmagic.pipeline.PageModelPipeline;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -27,11 +26,4 @@ public class GithubRepoTest {
         }, GithubRepo.class).addUrl("https://github.com/code4craft/webmagic").setDownloader(new MockGithubDownloader()).test("https://github.com/code4craft/webmagic");
     }
 
-    @Test
-    public void test1() throws Exception {
-        SimpleHttpClient simpleHttpClient = new SimpleHttpClient();
-        GithubRepo model = simpleHttpClient.get("https://github.com/code4craft/webmagic",GithubRepo.class);
-        System.out.println(model);
-
-    }
 }
diff --git a/webmagic-extension/src/test/java/us/codecraft/webmagic/model/MockModel.java b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/MockModel.java
deleted file mode 100644
index 6531053..0000000
--- a/webmagic-extension/src/test/java/us/codecraft/webmagic/model/MockModel.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package us.codecraft.webmagic.model;
-
-import us.codecraft.webmagic.model.annotation.HelpUrl;
-import us.codecraft.webmagic.model.annotation.TargetUrl;
-
-/**
- * @author code4crafer@gmail.com
- */
-@TargetUrl(value = "http://webmagic.io/post/\\d+",sourceRegion = "//li[@class='post']")
-@HelpUrl(value = "http://webmagic.io/list/\\d+",sourceRegion = "//li[@class='list']")
-public class MockModel {
-
-}
diff --git a/webmagic-extension/src/test/java/us/codecraft/webmagic/model/ModelPageProcessorTest.java b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/ModelPageProcessorTest.java
index 48f6073..0fb71c8 100644
--- a/webmagic-extension/src/test/java/us/codecraft/webmagic/model/ModelPageProcessorTest.java
+++ b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/ModelPageProcessorTest.java
@@ -1,19 +1,13 @@
 package us.codecraft.webmagic.model;
 
-import org.apache.commons.io.IOUtils;
-import org.apache.commons.lang3.time.DateFormatUtils;
 import org.junit.Test;
 import us.codecraft.webmagic.Page;
 import us.codecraft.webmagic.Request;
 import us.codecraft.webmagic.model.annotation.ExtractBy;
-import us.codecraft.webmagic.model.annotation.Formatter;
+import us.codecraft.webmagic.model.annotation.HelpUrl;
 import us.codecraft.webmagic.model.annotation.TargetUrl;
-import us.codecraft.webmagic.model.formatter.DateFormatter;
 import us.codecraft.webmagic.selector.PlainText;
 
-import java.io.IOException;
-import java.util.Date;
-
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
@@ -22,6 +16,8 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 public class ModelPageProcessorTest {
 
+    private PageMocker pageMocker = new PageMocker();
+
     @TargetUrl("http://codecraft.us/foo")
     public static class ModelFoo {
 
@@ -38,15 +34,10 @@ public class ModelPageProcessorTest {
 
     }
 
-    public static class ModelDate {
+    @TargetUrl(value = "http://webmagic.io/post/\\d+",sourceRegion = "//li[@class='post']")
+    @HelpUrl(value = "http://webmagic.io/list/\\d+",sourceRegion = "//li[@class='list']")
+    public static class MockModel {
 
-        @Formatter(value = "yyyyMMdd", formatter = DateFormatter.class)
-        @ExtractBy(value = "//div[@class='date']/text()", notNull = true)
-        private Date date;
-
-        public Date getDate() {
-            return date;
-        }
     }
 
     @Test
@@ -63,26 +54,11 @@ public class ModelPageProcessorTest {
     @Test
     public void testExtractLinks() throws Exception {
         ModelPageProcessor modelPageProcessor = ModelPageProcessor.create(null, MockModel.class);
-        Page page = getMockPage();
+        Page page = pageMocker.getMockPage();
         modelPageProcessor.process(page);
         assertThat(page.getTargetRequests()).containsExactly(new Request("http://webmagic.io/list/1"), new Request("http://webmagic.io/list/2"), new Request("http://webmagic.io/post/1"), new Request("http://webmagic.io/post/2"));
 
     }
 
-    @Test
-    public void testExtractDate() throws Exception {
-        ModelPageProcessor modelPageProcessor = ModelPageProcessor.create(null, ModelDate.class);
-        Page page = getMockPage();
-        modelPageProcessor.process(page);
-        ModelDate modelDate = (ModelDate) page.getResultItems().get(ModelDate.class.getCanonicalName());
-        assertThat(DateFormatUtils.format(modelDate.getDate(),"yyyyMMdd")).isEqualTo("20170603");
-    }
 
-    private Page getMockPage() throws IOException {
-        Page page = new Page();
-        page.setRawText(IOUtils.toString(getClass().getClassLoader().getResourceAsStream("html/mock-webmagic.html")));
-        page.setRequest(new Request("http://webmagic.io/list/0"));
-        page.setUrl(new PlainText("http://webmagic.io/list/0"));
-        return page;
-    }
 }
diff --git a/webmagic-extension/src/test/java/us/codecraft/webmagic/model/PageMapperTest.java b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/PageMapperTest.java
index 8588365..45938d6 100644
--- a/webmagic-extension/src/test/java/us/codecraft/webmagic/model/PageMapperTest.java
+++ b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/PageMapperTest.java
@@ -1,13 +1,6 @@
 package us.codecraft.webmagic.model;
 
-import org.apache.commons.io.IOUtils;
 import org.junit.Test;
-import us.codecraft.webmagic.Page;
-import us.codecraft.webmagic.Request;
-import us.codecraft.webmagic.model.annotation.ExtractBy;
-import us.codecraft.webmagic.selector.PlainText;
-
-import java.io.IOException;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -18,29 +11,13 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 public class PageMapperTest {
 
-    public static class GithubRepo {
-
-        @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.name",source = ExtractBy.Source.RawText)
-        private String name;
-
-        public String getName() {
-            return name;
-        }
-    }
+    private PageMocker pageMocker = new PageMocker();
 
     @Test
     public void test_get() throws Exception {
-        PageMapper<GithubRepo> pageMapper = new PageMapper<GithubRepo>(GithubRepo.class);
-        GithubRepo githubRepo = pageMapper.get(getMockJsonPage());
+        PageMapper<GithubRepoApi> pageMapper = new PageMapper<GithubRepoApi>(GithubRepoApi.class);
+        GithubRepoApi githubRepo = pageMapper.get(pageMocker.getMockJsonPage());
         assertThat(githubRepo.getName()).isEqualTo("webmagic");
     }
 
-    private Page getMockJsonPage() throws IOException {
-        Page page = new Page();
-        page.setRawText(IOUtils.toString(getClass().getClassLoader().getResourceAsStream("json/mock-githubrepo.json")));
-        page.setRequest(new Request("https://api.github.com/repos/code4craft/webmagic"));
-        page.setUrl(new PlainText("https://api.github.com/repos/code4craft/webmagic"));
-        return page;
-    }
-    
 }
diff --git a/webmagic-extension/src/test/java/us/codecraft/webmagic/model/PageMocker.java b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/PageMocker.java
new file mode 100644
index 0000000..4b0c133
--- /dev/null
+++ b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/PageMocker.java
@@ -0,0 +1,32 @@
+package us.codecraft.webmagic.model;
+
+import org.apache.commons.io.IOUtils;
+import us.codecraft.webmagic.Page;
+import us.codecraft.webmagic.Request;
+import us.codecraft.webmagic.selector.PlainText;
+
+import java.io.IOException;
+
+/**
+ * @author code4crafter@gmail.com
+ *         Date: 2017/6/3
+ *         Time: 下午9:08
+ */
+public class PageMocker {
+
+    public Page getMockJsonPage() throws IOException {
+        Page page = new Page();
+        page.setRawText(IOUtils.toString(PageMocker.class.getClassLoader().getResourceAsStream("json/mock-githubrepo.json")));
+        page.setRequest(new Request("https://api.github.com/repos/code4craft/webmagic"));
+        page.setUrl(new PlainText("https://api.github.com/repos/code4craft/webmagic"));
+        return page;
+    }
+
+    public Page getMockPage() throws IOException {
+        Page page = new Page();
+        page.setRawText(IOUtils.toString(PageMocker.class.getClassLoader().getResourceAsStream("html/mock-webmagic.html")));
+        page.setRequest(new Request("http://webmagic.io/list/0"));
+        page.setUrl(new PlainText("http://webmagic.io/list/0"));
+        return page;
+    }
+}
diff --git a/webmagic-extension/src/test/java/us/codecraft/webmagic/model/PageModelExtractorTest.java b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/PageModelExtractorTest.java
new file mode 100644
index 0000000..77739e5
--- /dev/null
+++ b/webmagic-extension/src/test/java/us/codecraft/webmagic/model/PageModelExtractorTest.java
@@ -0,0 +1,103 @@
+package us.codecraft.webmagic.model;
+
+import org.apache.commons.lang3.time.DateFormatUtils;
+import org.junit.Test;
+import us.codecraft.webmagic.model.annotation.ExtractBy;
+import us.codecraft.webmagic.model.annotation.Formatter;
+import us.codecraft.webmagic.model.formatter.DateFormatter;
+
+import java.util.Date;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author code4crafter@gmail.com
+ *         Date: 2017/6/3
+ *         Time: 下午9:06
+ */
+public class PageModelExtractorTest {
+
+    private PageMocker pageMocker = new PageMocker();
+
+    public static class ModelDateStr {
+
+        @ExtractBy(value = "//div[@class='date']/text()", notNull = true)
+        private String dateStr;
+
+    }
+
+    public static class ModelDate {
+
+        @Formatter(value = "yyyyMMdd", formatter = DateFormatter.class)
+        @ExtractBy(value = "//div[@class='date']/text()", notNull = true)
+        private Date date;
+
+    }
+
+    public static class ModelInt {
+
+        @ExtractBy(value = "//div[@class='number']/text()", notNull = true)
+        private int number;
+
+    }
+
+    public static class ModelStringList {
+
+        @ExtractBy("//a/@href")
+        private List<String> links;
+
+    }
+
+    public static class ModelIntList {
+
+        @Formatter(subClazz = Integer.class)
+        @ExtractBy("//li[@class='numbers']/text()")
+        private List<Integer> numbers;
+
+    }
+
+    public static class ModelDateList {
+
+        @Formatter(subClazz = Date.class, value = "yyyyMMdd")
+        @ExtractBy("//li[@class='dates']/text()")
+        private List<Date> dates;
+
+    }
+
+    @Test
+    public void testXpath() throws Exception {
+        ModelDateStr modelDate = (ModelDateStr) PageModelExtractor.create(ModelDateStr.class).process(pageMocker.getMockPage());
+        assertThat(modelDate.dateStr).isEqualTo("20170603");
+    }
+
+    @Test
+    public void testExtractDate() throws Exception {
+        ModelDate modelDate = (ModelDate) PageModelExtractor.create(ModelDate.class).process(pageMocker.getMockPage());
+        assertThat(DateFormatUtils.format(modelDate.date,"yyyyMMdd")).isEqualTo("20170603");
+    }
+
+    @Test
+    public void testExtractInt() throws Exception {
+        ModelInt modelDate = (ModelInt) PageModelExtractor.create(ModelInt.class).process(pageMocker.getMockPage());
+        assertThat(modelDate.number).isEqualTo(12);
+    }
+
+    @Test
+    public void testExtractList() throws Exception {
+        ModelStringList modelDate = (ModelStringList) PageModelExtractor.create(ModelStringList.class).process(pageMocker.getMockPage());
+        assertThat(modelDate.links).hasSize(8);
+    }
+
+    @Test
+    public void testExtractIntList() throws Exception {
+        ModelIntList modelDate = (ModelIntList) PageModelExtractor.create(ModelIntList.class).process(pageMocker.getMockPage());
+        assertThat(modelDate.numbers).hasSize(4);
+    }
+
+    @Test
+    public void testExtractDateList() throws Exception {
+        ModelDateList modelDate = (ModelDateList) PageModelExtractor.create(ModelDateList.class).process(pageMocker.getMockPage());
+        assertThat(modelDate.dates).hasSize(4);
+    }
+}
diff --git a/webmagic-extension/src/test/resources/html/mock-webmagic.html b/webmagic-extension/src/test/resources/html/mock-webmagic.html
index d6039f9..ed09a13 100644
--- a/webmagic-extension/src/test/resources/html/mock-webmagic.html
+++ b/webmagic-extension/src/test/resources/html/mock-webmagic.html
@@ -6,6 +6,7 @@
 </head>
 <body>
 <div class="date">20170603</div>
+<div class="number">12</div>
 <ul>
     <li class="list"><a href="http://webmagic.io/list/1"></a></li>
     <li class="list"><a href="http://webmagic.io/list/2"></a></li>
@@ -18,6 +19,17 @@
     <li class="post"><a href="http://webmagic.io/list/3"></a></li>
     <li class="post"><a href="http://webmagic.io/list/4"></a></li>
 </ul>
-
+<ul>
+    <li class="numbers">1</li>
+    <li class="numbers">2</li>
+    <li class="numbers">3</li>
+    <li class="numbers">4</li>
+</ul>
+<ul>
+    <li class="dates">20170601</li>
+    <li class="dates">20170602</li>
+    <li class="dates">20170603</li>
+    <li class="dates">20170604</li>
+</ul>
 </body>
 </html>
\ No newline at end of file