Inherit support of Field annotation in Model #103

webmagic-extension/src/main/java/us/codecraft/webmagic/model/PageModelExtractor.java

@@ -9,6 +9,7 @@ import us.codecraft.webmagic.model.formatter.BasicTypeFormatter;
 import us.codecraft.webmagic.model.formatter.ObjectFormatter;
 import us.codecraft.webmagic.model.formatter.ObjectFormatters;
 import us.codecraft.webmagic.selector.*;
+import us.codecraft.webmagic.utils.ClassUtils;
 import us.codecraft.webmagic.utils.ExtractorUtils;
 
 import java.lang.annotation.Annotation;
@@ -52,8 +53,9 @@ class PageModelExtractor {
     private void init(Class clazz) {
         this.clazz = clazz;
         initClassExtractors();
+        clazz.getDeclaredFields()
         fieldExtractors = new ArrayList<FieldExtractor>();
-        for (Field field : clazz.getDeclaredFields()) {
+        for (Field field : ClassUtils.getFieldsIncludeSuperClass(clazz)) {
             field.setAccessible(true);
             FieldExtractor fieldExtractor = getAnnotationExtractBy(clazz, field);
             FieldExtractor fieldExtractorTmp = getAnnotationExtractCombo(clazz, field);

webmagic-extension/src/main/java/us/codecraft/webmagic/utils/ClassUtils.java

+package us.codecraft.webmagic.utils;
+
+import java.lang.reflect.Field;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+/**
+ * @author code4crafter@gmail.com
+ * @since 0.5.0
+ */
+public abstract class ClassUtils {
+
+    public static Set<Field> getFieldsIncludeSuperClass(Class clazz) {
+        Set<Field> fields = new LinkedHashSet<Field>();
+        Class current = clazz;
+        while (current != null) {
+            Field[] currentFields = current.getDeclaredFields();
+            for (Field currentField : currentFields) {
+                fields.add(currentField);
+            }
+            current = current.getSuperclass();
+        }
+        return fields;
+    }
+
+}

webmagic-extension/src/test/java/us/codecraft/webmagic/model/BaseRepo.java

+package us.codecraft.webmagic.model;
+
+import us.codecraft.webmagic.model.annotation.ExtractBy;
+
+/**
+ * @author code4crafter@gmail.com
+ */
+public class BaseRepo {
+
+    @ExtractBy("//ul[@class='pagehead-actions']/li[1]//a[@class='social-count js-social-count']/text()")
+    protected int star;
+}

webmagic-extension/src/test/java/us/codecraft/webmagic/model/GithubRepo.java

+package us.codecraft.webmagic.model;
+
+import us.codecraft.webmagic.Site;
+import us.codecraft.webmagic.model.annotation.ExtractBy;
+import us.codecraft.webmagic.model.annotation.HelpUrl;
+import us.codecraft.webmagic.model.annotation.TargetUrl;
+
+/**
+ * @author code4crafter@gmail.com <br>
+ * @since 0.3.2
+ */
+@TargetUrl("https://github.com/\\w+/\\w+")
+@HelpUrl({"https://github.com/\\w+\\?tab=repositories", "https://github.com/\\w+", "https://github.com/explore/*"})
+public class GithubRepo extends BaseRepo{
+
+    @ExtractBy("//ul[@class='pagehead-actions']/li[2]//a[@class='social-count']/text()")
+    private int fork;
+
+    public static void main(String[] args) {
+        OOSpider.create(Site.me().setSleepTime(100)
+                , new ConsolePageModelPipeline(), GithubRepo.class)
+                .addUrl("https://github.com/code4craft").thread(10).run();
+    }
+
+    public int getStar() {
+        return star;
+    }
+
+    public int getFork() {
+        return fork;
+    }
+}

webmagic-extension/src/test/java/us/codecraft/webmagic/model/GithubRepoTest.java

@@ -5,7 +5,6 @@ import org.junit.Test;
 import us.codecraft.webmagic.downloader.MockGithubDownloader;
 import us.codecraft.webmagic.Site;
 import us.codecraft.webmagic.Task;
-import us.codecraft.webmagic.example.GithubRepo;
 import us.codecraft.webmagic.pipeline.PageModelPipeline;
 
 /**