修复index计算不正确的bug，整体版本更为0.1.1

src/main/java/cn/wanghaomiao/example/XpathTest.java

@@ -8,6 +8,8 @@
 import org.jsoup.nodes.Document;
 import org.jsoup.nodes.Element;
 
+import java.io.BufferedReader;
+import java.io.FileReader;
 import java.io.IOException;
 import java.util.List;
 
@@ -34,9 +36,21 @@ public static void main(String[] args) throws IOException, NoSuchFunctionExcepti
         String x11 = "//div[@id='post_list']/div[self::div/div/div/span[@class='article_view']/a/num()>1000]/div/h3/allText()";
         String x12 = "//div[@id='post_list']/div[2]/div/p/preceding-sibling::h3/allText()";
         String x13 = "//div[@id='post_list']/div[2]/div/p/preceding-sibling::h3/allText()|//div[@id='post_list']/div[1]/div/h3/allText()";
-        Document doc = Jsoup.connect("http://www.cnblogs.com/").get();
+        String x14 = "//html/body/div/div[4]/div[6]/div[19]/div[2]/h3/a";
+        String x15 = "//html[1]/body[1]/div[3]/div[1]/div[1]/div[1]/ul[1]/li/div[2]/h2/a";
+        String x16 = "//html/body/div[3]/div/div/div/ul/li/div[2]/h2/a";
+//        Document doc = Jsoup.connect("http://www.cnblogs.com/").get();
+//        BufferedReader br = new BufferedReader(new FileReader("D:\\LAB\\tt.html"));
+//        StringBuilder content = new StringBuilder();
+//        String line = br.readLine();
+//        content.append(line);
+//        while (line!=null){
+//            line = br.readLine();
+//            content.append(line);
+//        }
+        Document doc = Jsoup.connect("http://book.douban.com/search/java").userAgent("Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0").get();
         JXDocument jxDocument = new JXDocument(doc);
-        List<Object> rs = jxDocument.sel(x13);
+        List<Object> rs = jxDocument.sel(x16);
         for (Object o:rs){
             if (o instanceof Element){
                 int index = ((Element) o).siblingIndex();

src/main/java/cn/wanghaomiao/xpath/core/Functions.java

@@ -1,5 +1,6 @@
 package cn.wanghaomiao.xpath.core;
 
+import cn.wanghaomiao.xpath.util.CommonUtil;
 import org.jsoup.nodes.Element;
 import org.jsoup.select.Elements;
 
@@ -132,35 +133,29 @@ public String allText(Element e){
     }
 
     /**
-     * 判断一个元素是不是最后一个
+     * 判断一个元素是不是最后一个同名同胞中的
      * @param e
      * @return
      */
     public boolean last(Element e){
-        return e.equals(e.lastElementSibling());
+        return CommonUtil.getElIndexInSameTags(e)==CommonUtil.sameTagElNums(e);
     }
     /**
-     * 判断一个元素是不是第一个
+     * 判断一个元素是不是同名同胞中的第一个
      * @param e
      * @return
      */
     public boolean first(Element e){
-        return e.equals(e.firstElementSibling());
+        return CommonUtil.getElIndexInSameTags(e)==1;
     }
 
     /**
-     * 返回一个元素在兄弟节点中的位置
+     * 返回一个元素在同名兄弟节点中的位置
      * @param e
      * @return
      */
     public int position(Element e){
-        int index = 1;
-        Element curEl = e.firstElementSibling();
-        while (!e.equals(curEl)){
-            curEl = curEl.nextElementSibling();
-            index+=1;
-        }
-        return index;
+        return CommonUtil.getElIndexInSameTags(e);
     }
 
     /**

src/main/java/cn/wanghaomiao/xpath/core/XpathEvaluator.java

@@ -4,8 +4,8 @@
 import cn.wanghaomiao.xpath.exception.NoSuchFunctionException;
 import cn.wanghaomiao.xpath.model.Node;
 import cn.wanghaomiao.xpath.model.Predicate;
+import cn.wanghaomiao.xpath.util.CommonUtil;
 import cn.wanghaomiao.xpath.util.ScopeEm;
-import cn.wanghaomiao.xpath.util.StrUtil;
 import org.apache.commons.lang.StringUtils;
 import org.jsoup.nodes.Element;
 import org.jsoup.select.Elements;
@@ -200,7 +200,7 @@ public Element filter(Element e,Node node) throws NoSuchFunctionException, NoSuc
      */
     public Elements getAxisScopeEls(String axis,Element e) throws NoSuchAxisException {
         try {
-            String functionName = StrUtil.getJMethodNameFromStr(axis);
+            String functionName = CommonUtil.getJMethodNameFromStr(axis);
             Method axisSelector = AxisSelector.class.getMethod(functionName, Element.class);
             return (Elements) axisSelector.invoke(SingletonProducer.getInstance().getAxisSelector(),e);
         }catch (NoSuchMethodException e1) {
@@ -247,13 +247,10 @@ public Object callFilterFunc(String funcname,Element el) throws NoSuchFunctionEx
     }
 
     public int getElIndex(Element e){
-        int index = 1;
-        Element curEl = e.firstElementSibling();
-        while (!e.equals(curEl)){
-            curEl = curEl.nextElementSibling();
-            index+=1;
+        if (e!=null){
+            return CommonUtil.getElIndexInSameTags(e);
         }
-        return index;
+        return 1;
     }
 
 }

src/main/java/cn/wanghaomiao/xpath/util/CommonUtil.java

@@ -0,0 +1,53 @@
+package cn.wanghaomiao.xpath.util;
+
+import org.jsoup.nodes.Element;
+import org.jsoup.select.Elements;
+
+/**
+ * @author: 汪浩淼 [ et.tw@163.com ]
+ * Date: 14-3-15 下午10:31
+ */
+public class CommonUtil {
+    public static String getJMethodNameFromStr(String str){
+        if (str.contains("-")){
+            String[] pies = str.split("-");
+            StringBuilder sb = new StringBuilder(pies[0]);
+            for (int i=1;i<pies.length;i++){
+                sb.append(pies[i].substring(0,1).toUpperCase()).append(pies[i].substring(1));
+            }
+            return sb.toString();
+        }
+        return str;
+    }
+
+    /**
+     * 获取同名元素在同胞中的index
+     * @param e
+     * @return
+     */
+    public static int getElIndexInSameTags(Element e){
+        Elements chs = e.parent().children();
+        int index = 1;
+        for(int i=0;i<chs.size();i++){
+            Element cur = chs.get(i);
+            if (e.tagName().equals(cur.tagName())){
+                if (e.equals(cur)){
+                    break;
+                }else {
+                    index+=1;
+                }
+            }
+        }
+        return index;
+    }
+
+    /**
+     * 获取同胞中同名元素的数量
+     * @param e
+     * @return
+     */
+    public static int sameTagElNums(Element e){
+        Elements els = e.parent().getElementsByTag(e.tagName());
+        return els.size();
+    }
+}