diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/DuplicatedRemoveScheduler.java b/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/DuplicatedRemoveScheduler.java
index 7b319b6..4b70b83 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/DuplicatedRemoveScheduler.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/DuplicatedRemoveScheduler.java
@@ -18,7 +18,7 @@ public abstract class DuplicatedRemoveScheduler implements Scheduler {
     @Override
     public void push(Request request, Task task) {
         logger.trace("get a candidate url {}", request.getUrl());
-        if (isDuplicate(request, task) || shouldReserved(request)) {
+        if (!isDuplicate(request, task) || shouldReserved(request)) {
             logger.debug("push to queue {}", request.getUrl());
             pushWhenNoDuplicate(request, task);
         }
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/LocalDuplicatedRemoveScheduler.java b/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/LocalDuplicatedRemoveScheduler.java
index c127c98..a1b0cab 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/LocalDuplicatedRemoveScheduler.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/LocalDuplicatedRemoveScheduler.java
@@ -24,7 +24,7 @@ public abstract class LocalDuplicatedRemoveScheduler extends DuplicatedRemoveSch
 
     @Override
     protected boolean isDuplicate(Request request, Task task) {
-        return urls.add(request.getUrl());
+        return !urls.add(request.getUrl());
     }
 
     @Override
diff --git a/webmagic-extension/src/main/java/us/codecraft/webmagic/scheduler/RedisScheduler.java b/webmagic-extension/src/main/java/us/codecraft/webmagic/scheduler/RedisScheduler.java
index dc2ee2e..338f5af 100644
--- a/webmagic-extension/src/main/java/us/codecraft/webmagic/scheduler/RedisScheduler.java
+++ b/webmagic-extension/src/main/java/us/codecraft/webmagic/scheduler/RedisScheduler.java
@@ -46,7 +46,7 @@ public class RedisScheduler extends DuplicatedRemoveScheduler implements Monitor
     protected boolean isDuplicate(Request request, Task task) {
         Jedis jedis = pool.getResource();
         try {
-            boolean isDuplicate = !jedis.sismember(getSetKey(task), request.getUrl());
+            boolean isDuplicate = jedis.sismember(getSetKey(task), request.getUrl());
             if (!isDuplicate) {
                 jedis.sadd(getSetKey(task), request.getUrl());
             }
diff --git a/webmagic-samples/src/main/java/us/codecraft/webmagic/samples/AmanzonPageProcessor.java b/webmagic-samples/src/main/java/us/codecraft/webmagic/samples/AmanzonPageProcessor.java
new file mode 100644
index 0000000..a980851
--- /dev/null
+++ b/webmagic-samples/src/main/java/us/codecraft/webmagic/samples/AmanzonPageProcessor.java
@@ -0,0 +1,53 @@
+package us.codecraft.webmagic.samples;
+
+import us.codecraft.webmagic.Page;
+import us.codecraft.webmagic.Site;
+import us.codecraft.webmagic.Spider;
+import us.codecraft.webmagic.processor.PageProcessor;
+import us.codecraft.webmagic.selector.Html;
+
+import java.util.List;
+
+/**
+ * @author code4crafer@gmail.com
+ */
+public class AmanzonPageProcessor implements PageProcessor{
+    public void process(Page page) {
+
+        Html html = page.getHtml();
+        List<String> questionList =  html.xpath("//table[@class='tgCustomerCommunityCenterColumn']//div[@class='content']//table[@class='dataGrid']//tr").all();
+
+        if(questionList != null && questionList.size() > 1)
+        {
+            //i=0是列名称，所以i从1开始
+            for( int i = 1 ; i < questionList.size(); i++)
+            {
+                System.out.println(questionList.get(i));
+                Html tempHtml =  Html.create("<table>"+questionList.get(i)+"</table>");
+                String comment = tempHtml.xpath("//td[@class='title']//a/text()").toString();
+                System.out.println(comment);
+                String answerNum =  tempHtml.xpath("//td[@class='num']/text()").toString();
+                System.out.println(answerNum);
+                String createTime = tempHtml.xpath("//td[3]/text()").toString();
+                System.out.println(createTime);
+
+				/* Document doc = Jsoup.parse(questionList.get(i));
+				 Html hmt  = Html.create(questionList.get(i)) ;
+			     String str = hmt.links().toString();
+				  String   content =   doc.getElementsByTag("a").text();
+				  String ss = doc.text();*/
+
+            }
+        }
+
+    }
+
+    @Override
+    public Site getSite() {
+        return Site.me();
+    }
+
+    public static void main(String[] args) {
+        Spider.create(new AmanzonPageProcessor()).test("http://www.amazon.de/forum/Fx27CUFD8S7LJ5D");
+    }
+}
diff --git a/webmagic-samples/src/main/java/us/codecraft/webmagic/samples/OschinaBlogPageProcesser.java b/webmagic-samples/src/main/java/us/codecraft/webmagic/samples/OschinaBlogPageProcesser.java
index ded1a5f..8055b36 100644
--- a/webmagic-samples/src/main/java/us/codecraft/webmagic/samples/OschinaBlogPageProcesser.java
+++ b/webmagic-samples/src/main/java/us/codecraft/webmagic/samples/OschinaBlogPageProcesser.java
@@ -4,6 +4,7 @@ import us.codecraft.webmagic.Page;
 import us.codecraft.webmagic.Site;
 import us.codecraft.webmagic.Spider;
 import us.codecraft.webmagic.processor.PageProcessor;
+import us.codecraft.webmagic.scheduler.RedisScheduler;
 
 import java.util.List;
 
@@ -30,6 +31,6 @@ public class OschinaBlogPageProcesser implements PageProcessor {
     }
 
     public static void main(String[] args) {
-        Spider.create(new OschinaBlogPageProcesser()).run();
+        Spider.create(new OschinaBlogPageProcesser()).setScheduler(new RedisScheduler("localhost")).run();
     }
 }