diff --git a/include/cppjieba/TextRankExtractor.hpp b/include/cppjieba/TextRankExtractor.hpp
index 8e7d18a..82e56f3 100644
--- a/include/cppjieba/TextRankExtractor.hpp
+++ b/include/cppjieba/TextRankExtractor.hpp
@@ -82,12 +82,41 @@ namespace cppjieba {
       }
     };
 
-  public: 
+  public: 
+  TextRankExtractor(const string& dictPath, 
+        const string& hmmFilePath, 
+        const string& stopWordPath, 
+        const string& userDict = "") 
+    : segment_(dictPath, hmmFilePath, userDict) {
+    LoadStopWordDict(stopWordPath);
+  }
+  TextRankExtractor(const DictTrie* dictTrie, 
+        const HMMModel* model,
+        const string& stopWordPath) 
+    : segment_(dictTrie, model) {
+    LoadStopWordDict(stopWordPath);
+  }
     TextRankExtractor(const Jieba& jieba, const string& stopWordPath) : segment_(jieba.GetDictTrie(), jieba.GetHMMModel()) {
         LoadStopWordDict(stopWordPath);
     }
     ~TextRankExtractor() {
     }
+
+    void Extract(const string& sentence, vector<string>& keywords, size_t topN) const {
+      vector<Word> topWords;
+      Extract(sentence, topWords, topN);
+      for (size_t i = 0; i < topWords.size(); i++) {
+        keywords.push_back(topWords[i].word);
+      }
+    }
+
+    void Extract(const string& sentence, vector<pair<string, double> >& keywords, size_t topN) const {
+      vector<Word> topWords;
+      Extract(sentence, topWords, topN);
+      for (size_t i = 0; i < topWords.size(); i++) {
+        keywords.push_back(pair<string, double>(topWords[i].word, topWords[i].weight));
+      }
+    }
 
     void Extract(const string& sentence, vector<Word>& keywords, size_t topN, size_t span=5,size_t rankTime=10) const {
       vector<string> words;
@@ -161,6 +190,10 @@ namespace cppjieba {
     MixSegment segment_;
     unordered_set<string> stopWords_;
   };
+  
+  inline ostream& operator << (ostream& os, const TextRankExtractor::Word& word) {
+    return os << word.word << '|' << word.offsets << '|' << word.weight; 
+  }
 } // namespace cppjieba
 
 #endif
diff --git a/test/unittest/textrank_test.cpp b/test/unittest/textrank_test.cpp
new file mode 100644
index 0000000..39b2163
--- /dev/null
+++ b/test/unittest/textrank_test.cpp
@@ -0,0 +1,85 @@
+#include "cppjieba/TextRankExtractor.hpp"
+#include "gtest/gtest.h"
+
+using namespace cppjieba;
+
+TEST(TextRankExtractorTest, Test1) {
+  TextRankExtractor Extractor(
+    "../test/testdata/extra_dict/jieba.dict.small.utf8",
+    "../dict/hmm_model.utf8", 
+    "../dict/stop_words.utf8");
+  {
+    string s("你好世界世界而且而且");
+    string res;
+    size_t topN = 5;
+
+    {
+      vector<string> words;
+      Extractor.Extract(s, words, topN);
+      res << words;
+      ASSERT_EQ(res, "[\"世界\", \"你好\"]");
+    }
+
+    {
+      vector<pair<string, double> > words;
+      Extractor.Extract(s, words, topN);
+      res << words;
+      ASSERT_EQ(res, "[\"世界:1\", \"你好:0.514286\"]");
+    }
+
+    {
+      vector<TextRankExtractor::Word> words;
+      Extractor.Extract(s, words, topN);
+      res << words;
+      ASSERT_EQ(res, "[\"世界|[\"6\", \"12\"]|1\", \"你好|[\"0\"]|0.514286\"]");
+    }
+  }
+
+  { 
+    string s("\xe6\x88\x91\xe6\x98\xaf\xe6\x8b\x96\xe6\x8b\x89\xe6\x9c\xba\xe5\xad\xa6\xe9\x99\xa2\xe6\x89\x8b\xe6\x89\xb6\xe6\x8b\x96\xe6\x8b\x89\xe6\x9c\xba\xe4\xb8\x93\xe4\xb8\x9a\xe7\x9a\x84\xe3\x80\x82\xe4\xb8\x8d\xe7\x94\xa8\xe5\xa4\x9a\xe4\xb9\x85\xef\xbc\x8c\xe6\x88\x91\xe5\xb0\xb1\xe4\xbc\x9a\xe5\x8d\x87\xe8\x81\x8c\xe5\x8a\xa0\xe8\x96\xaa\xef\xbc\x8c\xe5\xbd\x93\xe4\xb8\x8a CEO\xef\xbc\x8c\xe8\xb5\xb0\xe4\xb8\x8a\xe4\xba\xba\xe7\x94\x9f\xe5\xb7\x85\xe5\xb3\xb0");
+    string res;
+    vector<TextRankExtractor::Word> wordweights;
+    size_t topN = 5;
+    Extractor.Extract(s, wordweights, topN);
+    res << wordweights;
+    ASSERT_EQ(res, "[\"\xE4\xB8\x93\xE4\xB8\x9A|[\"36\"]|1\", \"CEO|[\"94\"]|0.953149\", \"\xE6\x89\x8B\xE6\x89\xB6\xE6\x8B\x96\xE6\x8B\x89\xE6\x9C\xBA|[\"21\"]|0.794203\", \"\xE5\xBD\x93\xE4\xB8\x8A|[\"87\"]|0.78716\", \"\xE8\xB5\xB0\xE4\xB8\x8A|[\"100\"]|0.767636\"]");
+  }
+
+  {
+    string s("一部iPhone6");
+    string res;
+    vector<TextRankExtractor::Word> wordweights;
+    size_t topN = 5;
+    Extractor.Extract(s, wordweights, topN);
+    res << wordweights;
+    ASSERT_EQ(res, "[\"iPhone6|[\"6\"]|1\", \"\xE4\xB8\x80\xE9\x83\xA8|[\"0\"]|0.996126\"]");
+  }
+}
+
+TEST(TextRankExtractorTest, Test2) {
+  TextRankExtractor Extractor(
+    "../test/testdata/extra_dict/jieba.dict.small.utf8",
+    "../dict/hmm_model.utf8",
+    "../dict/stop_words.utf8",
+    "../test/testdata/userdict.utf8");
+
+  {
+    string s("\xe8\x93\x9d\xe7\xbf\x94\xe4\xbc\x98\xe7\xa7\x80\xe6\xaf\x95\xe4\xb8\x9a\xe7\x94\x9f");
+    string res;
+    vector<TextRankExtractor::Word> wordweights;
+    size_t topN = 5;
+    Extractor.Extract(s, wordweights, topN);
+    res << wordweights;
+    ASSERT_EQ(res, "[\"\xE4\xBC\x98\xE7\xA7\x80|[\"6\"]|1\", \"\xE6\xAF\x95\xE4\xB8\x9A\xE7\x94\x9F|[\"12\"]|0.996685\", \"\xE8\x93\x9D\xE7\xBF\x94|[\"0\"]|0.992994\"]");
+  }
+
+  {
+    string s("一部iPhone6");
+    string res;
+    vector<TextRankExtractor::Word> wordweights;
+    size_t topN = 5;
+    Extractor.Extract(s, wordweights, topN);
+    res << wordweights;
+    ASSERT_EQ(res, "[\"iPhone6|[\"6\"]|1\", \"\xE4\xB8\x80\xE9\x83\xA8|[\"0\"]|0.996126\"]");
+  }
+}