some refector

webmagic-samples/src/main/java/us/codecraft/webmagic/main/QuickStarter.java

@@ -19,34 +19,29 @@ import java.util.Scanner;
  */
 public class QuickStarter {
 
-    public static void main(String[] args) {
-        Map<String, Class> clazzMap = new LinkedHashMap<String, Class>();
+    private static Map<String, Class> clazzMap;
+
+    private static Map<String, String> urlMap;
+
+    private static void init(){
+        clazzMap = new LinkedHashMap<String, Class>();
         clazzMap.put("1", OschinaBlog.class);
         clazzMap.put("2", IteyeBlog.class);
         clazzMap.put("3", News163.class);
-        Map<String, String> urlMap = new LinkedHashMap<String, String>();
+        urlMap = new LinkedHashMap<String, String>();
         urlMap.put("1", "http://my.oschina.net/flashsword/blog");
         urlMap.put("2", "http://flashsword20.iteye.com/");
         urlMap.put("3", "http://news.163.com/");
-        Scanner stdin = new Scanner(System.in);
+    }
+
+    public static void main(String[] args) {
+        init();
         String key = null;
-        System.out.println("Choose a Spider demo:");
-        for (Map.Entry<String, Class> classEntry : clazzMap.entrySet()) {
-            System.out.println(classEntry.getKey()+"\t" + classEntry.getValue() + "\t" + urlMap.get(classEntry.getKey()));
-        }
-        while (key == null) {
-            key = new String(stdin.nextLine());
-            if (clazzMap.get(key) == null) {
-                System.out.println("Invalid choice!");
-                key = null;
-            }
-        }
+        key = readKey(key);
         System.out.println("The demo started and will last 20 seconds...");
-
         //Start spider
         OOSpider.create(Site.me().addStartUrl(urlMap.get(key)), clazzMap.get(key)).pipeline(new PagedPipeline()).pipeline(new ConsolePipeline()).runAsync();
 
-
         try {
             Thread.sleep(20000);
         } catch (InterruptedException e) {
@@ -56,4 +51,20 @@ public class QuickStarter {
         System.out.println("To more usage, try to customize your own Spider!");
         System.exit(0);
     }
+
+    private static String readKey(String key) {
+        Scanner stdin = new Scanner(System.in);
+        System.out.println("Choose a Spider demo:");
+        for (Map.Entry<String, Class> classEntry : clazzMap.entrySet()) {
+            System.out.println(classEntry.getKey()+"\t" + classEntry.getValue() + "\t" + urlMap.get(classEntry.getKey()));
+        }
+        while (key == null) {
+            key = new String(stdin.nextLine());
+            if (clazzMap.get(key) == null) {
+                System.out.println("Invalid choice!");
+                key = null;
+            }
+        }
+        return key;
+    }
 }