diff --git a/src/HMMSegment.hpp b/src/HMMSegment.hpp
index fc8935d..c9839a4 100644
--- a/src/HMMSegment.hpp
+++ b/src/HMMSegment.hpp
@@ -31,9 +31,11 @@ namespace CppJieba
             EmitProbMap _emitProbM;
             EmitProbMap _emitProbS;
             vector<EmitProbMap* > _emitProbVec;
+        private:
+            const string _hmmModelPath;
 
         public:
-            HMMSegment()
+            HMMSegment(const char * const filePath): _hmmModelPath(filePath)
             {
                 memset(_startProb, 0, sizeof(_startProb));
                 memset(_transProb, 0, sizeof(_transProb));
@@ -51,11 +53,11 @@ namespace CppJieba
                 dispose();
             }
         public:
-            bool init(const char* const modelPath)
+            virtual bool init()
             {
-                return _setInitFlag(_loadModel(modelPath));
+                return _setInitFlag(_loadModel(_hmmModelPath.c_str()));
             }
-            bool dispose()
+            virtual bool dispose()
             {
                 _setInitFlag(false);
                 return true;
@@ -88,11 +90,8 @@ namespace CppJieba
                 }
                 return true;
             }
-            //bool cut(const string& str, vector<string>& res)const
-            //{
-            //    return SegmentBase::cut(str, res);
-            //}
-            bool cut(Unicode::const_iterator begin, Unicode::const_iterator end, vector<string>& res)const
+        public:
+            virtual bool cut(Unicode::const_iterator begin, Unicode::const_iterator end, vector<string>& res)const
             {
                 if(!_getInitFlag())
                 {
diff --git a/src/ISegment.hpp b/src/ISegment.hpp
index 5099fa0..8821289 100644
--- a/src/ISegment.hpp
+++ b/src/ISegment.hpp
@@ -8,6 +8,9 @@ namespace CppJieba
     {
         public:
             virtual ~ISegment(){};
+        public:
+            virtual bool init() = 0;
+            virtual bool dispose() = 0;
         public:
             virtual bool cut(Unicode::const_iterator begin , Unicode::const_iterator end, vector<string>& res) const = 0;
             virtual bool cut(const string& str, vector<string>& res) const = 0;
diff --git a/src/MPSegment.hpp b/src/MPSegment.hpp
index 0601980..d5f39f7 100644
--- a/src/MPSegment.hpp
+++ b/src/MPSegment.hpp
@@ -32,12 +32,14 @@ namespace CppJieba
     {
         private:
             Trie _trie;
+        private:
+            const string _dictPath;
 
         public:
-            MPSegment(){};
+            MPSegment(const char * const dictPath): _dictPath(dictPath){};
             virtual ~MPSegment(){dispose();};
         public:
-            bool init(const char* const filePath)
+            virtual bool init()
             {
                 if(_getInitFlag())
                 {
@@ -49,8 +51,8 @@ namespace CppJieba
                     LogError("_trie.init failed.");
                     return false;
                 }
-                LogInfo("_trie.loadDict(%s) start...", filePath);
-                if(!_trie.loadDict(filePath))
+                LogInfo("_trie.loadDict(%s) start...", _dictPath.c_str());
+                if(!_trie.loadDict(_dictPath.c_str()))
                 {
                     LogError("_trie.loadDict faield.");
                     return false;
@@ -58,7 +60,7 @@ namespace CppJieba
                 LogInfo("_trie.loadDict end.");
                 return _setInitFlag(true);
             }
-            bool dispose()
+            virtual bool dispose()
             {
                 if(!_getInitFlag())
                 {
@@ -69,12 +71,7 @@ namespace CppJieba
                 return true;
             }
         public:
-            //bool cut(const string& str, vector<TrieNodeInfo>& segWordInfos)const;
-            //bool cut(const string& str, vector<string>& res)const
-            //{
-            //    return SegmentBase::cut(str, res);
-            //}
-            bool cut(Unicode::const_iterator begin, Unicode::const_iterator end, vector<string>& res)const
+            virtual bool cut(Unicode::const_iterator begin, Unicode::const_iterator end, vector<string>& res)const
             {
                 if(!_getInitFlag())
                 {
diff --git a/src/MixSegment.hpp b/src/MixSegment.hpp
index 6749f7f..8914256 100644
--- a/src/MixSegment.hpp
+++ b/src/MixSegment.hpp
@@ -13,7 +13,7 @@ namespace CppJieba
             MPSegment _mpSeg;
             HMMSegment _hmmSeg;
         public:
-            MixSegment() 
+            MixSegment(const char * const mpSegDict, const char * const hmmSegDict): _mpSeg(mpSegDict), _hmmSeg(hmmSegDict)
             {
             }
             virtual ~MixSegment()
@@ -21,26 +21,26 @@ namespace CppJieba
                 dispose();
             }
         public:
-            bool init(const char* const mpSegDict, const char* const hmmSegDict)
+            virtual bool init()
             {
                 if(_getInitFlag())
                 {
                     LogError("inited.");
                     return false;
                 }
-                if(!_mpSeg.init(mpSegDict))
+                if(!_mpSeg.init())
                 {
                     LogError("_mpSeg init");
                     return false;
                 }
-                if(!_hmmSeg.init(hmmSegDict))
+                if(!_hmmSeg.init())
                 {
                     LogError("_hmmSeg init");
                     return false;
                 }
                 return _setInitFlag(true);
             }
-            bool dispose()
+            virtual bool dispose()
             {
                 if(!_getInitFlag())
                 {
@@ -52,13 +52,9 @@ namespace CppJieba
                 return true;
             }
         public:
-            //virtual bool cut(const string& str, vector<string>& res) const;
-            //bool cut(const string& str, vector<string>& res)const
-            //{
-            //    return SegmentBase::cut(str, res);
-            //}
             using SegmentBase::cut;
-            bool cut(Unicode::const_iterator begin, Unicode::const_iterator end, vector<string>& res)const
+        public:
+            virtual bool cut(Unicode::const_iterator begin, Unicode::const_iterator end, vector<string>& res)const
             {
                 if(!_getInitFlag())
                 {
diff --git a/src/SegmentBase.hpp b/src/SegmentBase.hpp
index e56688d..44e4df3 100644
--- a/src/SegmentBase.hpp
+++ b/src/SegmentBase.hpp
@@ -18,6 +18,10 @@ namespace CppJieba
             bool _isInited;
             bool _getInitFlag()const{return _isInited;};
             bool _setInitFlag(bool flag){return _isInited = flag;};
+        public:
+            virtual bool init() = 0;
+            virtual bool dispose() = 0;
+        
         public:
             virtual bool cut(Unicode::const_iterator begin, Unicode::const_iterator end, vector<string>& res)const = 0;
             virtual bool cut(const string& str, vector<string>& res)const
diff --git a/src/segment.cpp b/src/segment.cpp
index 50fffba..28f3e80 100644
--- a/src/segment.cpp
+++ b/src/segment.cpp
@@ -53,8 +53,8 @@ int main(int argc, char ** argv)
 
     if("cutHMM" == algorithm)
     {
-        HMMSegment seg;
-        if(!seg.init(modelPath.c_str()))
+        HMMSegment seg(modelPath.c_str());
+        if(!seg.init())
         {
             cout<<"seg init failed."<<endl;
             return EXIT_FAILURE;
@@ -64,8 +64,8 @@ int main(int argc, char ** argv)
     }
     else if("cutDAG" == algorithm)
     {
-        MPSegment seg;
-        if(!seg.init(dictPath.c_str()))
+        MPSegment seg(dictPath.c_str());
+        if(!seg.init())
         {
             cout<<"seg init failed."<<endl;
             return false;
@@ -75,8 +75,8 @@ int main(int argc, char ** argv)
     }
     else
     {
-        MixSegment seg;
-        if(!seg.init(dictPath.c_str(), modelPath.c_str()))
+        MixSegment seg(dictPath.c_str(), modelPath.c_str());
+        if(!seg.init())
         {
             cout<<"seg init failed."<<endl;
             return EXIT_FAILURE;
diff --git a/src/server.cpp b/src/server.cpp
index 318d66c..89a830c 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -14,13 +14,10 @@ using namespace CppJieba;
 
 class ReqHandler: public IRequestHandler
 {
-    private:
-        string _dictPath;
-        string _modelPath;
     public:
-        ReqHandler(const string& dictPath, const string& modelPath): _dictPath(dictPath), _modelPath(modelPath){};
+        ReqHandler(const string& dictPath, const string& modelPath): _segment(dictPath.c_str(), modelPath.c_str()){};
         virtual ~ReqHandler(){};
-        virtual bool init(){return _segment.init(_dictPath.c_str(), _modelPath.c_str());};
+        virtual bool init(){return _segment.init();};
         virtual bool dispose(){return _segment.dispose();};
     public:
         virtual bool do_GET(const HttpReqInfo& httpReq, string& strSnd)