fixed #301 修复使用注解抽取JSON数据的问题

webmagic-extension/src/main/java/us/codecraft/webmagic/example/GithubRepoApi.java

@@ -15,19 +15,19 @@ import java.util.List;
  */
 public class GithubRepoApi implements HasKey {
 
-    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.name")
+    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.name", source = ExtractBy.Source.RawText)
     private String name;
 
-    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$..owner.login")
+    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$..owner.login", source = ExtractBy.Source.RawText)
     private String author;
 
-    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.language",multi = true)
+    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.language",multi = true, source = ExtractBy.Source.RawText)
     private List<String> language;
 
-    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.stargazers_count")
+    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.stargazers_count", source = ExtractBy.Source.RawText)
     private int star;
 
-    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.homepage")
+    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.forks_count", source = ExtractBy.Source.RawText)
     private int fork;
 
     @ExtractByUrl

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

@@ -17,7 +17,7 @@ class Extractor {
 
     protected final boolean multi;
 
-    static enum Source {Html, Url, RawHtml}
+    static enum Source {Html, Url, RawHtml, RawText}
 
     public Extractor(Selector selector, Source source, boolean notNull, boolean multi) {
         this.selector = selector;

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

@@ -179,7 +179,24 @@ class PageModelExtractor {
         ExtractBy extractBy = field.getAnnotation(ExtractBy.class);
         if (extractBy != null) {
             Selector selector = ExtractorUtils.getSelector(extractBy);
-            fieldExtractor = new FieldExtractor(field, selector, extractBy.source() == ExtractBy.Source.RawHtml ? FieldExtractor.Source.RawHtml : FieldExtractor.Source.Html,
+
+            FieldExtractor.Source source = null;
+            switch (extractBy.source()){
+                case  RawText:
+                    source = FieldExtractor.Source.RawText;
+                    break;
+                case RawHtml:
+                    source = FieldExtractor.Source.RawHtml;
+                    break;
+                case SelectedHtml:
+                    source =FieldExtractor.Source.Html;
+                    break;
+                default:
+                    source =FieldExtractor.Source.Html;
+
+            }
+
+            fieldExtractor = new FieldExtractor(field, selector, source,
                     extractBy.notNull(), extractBy.multi() || List.class.isAssignableFrom(field.getType()));
             Method setterMethod = getSetterMethod(clazz, field);
             if (setterMethod != null) {
@@ -284,6 +301,9 @@ class PageModelExtractor {
                         case Url:
                             value = fieldExtractor.getSelector().selectList(page.getUrl().toString());
                             break;
+                        case RawText:
+                            value = fieldExtractor.getSelector().selectList(page.getRawText());
+                            break;
                         default:
                             value = fieldExtractor.getSelector().selectList(html);
                     }
@@ -312,6 +332,9 @@ class PageModelExtractor {
                         case Url:
                             value = fieldExtractor.getSelector().select(page.getUrl().toString());
                             break;
+                        case RawText:
+                            value = fieldExtractor.getSelector().select(page.getRawText());
+                            break;
                         default:
                             value = fieldExtractor.getSelector().select(html);
                     }

webmagic-extension/src/main/java/us/codecraft/webmagic/model/annotation/ExtractBy.java

@@ -52,7 +52,8 @@ public @interface ExtractBy {
         /**
          * extract from the raw html
          */
-        RawHtml
+        RawHtml,
+        RawText
     }
 
     /**