diff --git a/core/Common/String.cpp b/core/Common/String.cpp
index 864b3a30..6200aaf1 100644
--- a/core/Common/String.cpp
+++ b/core/Common/String.cpp
@@ -37,19 +37,19 @@ e2d::String::~String()
 e2d::String &e2d::String::operator=(const wchar_t *str)
 {
 	m_str = str;
-	return *this;
+	return (*this);
 }
 
 e2d::String & e2d::String::operator=(const char *cstr)
 {
 	m_str = static_cast<wchar_t*>(_bstr_t(cstr));
-	return *this;
+	return (*this);
 }
 
 e2d::String & e2d::String::operator=(const String &str)
 {
 	m_str = str.m_str;
-	return *this;
+	return (*this);
 }
 
 bool e2d::String::operator==(const wchar_t *str)
@@ -192,27 +192,56 @@ bool e2d::String::operator<=(const String &str) const
 
 e2d::String & e2d::String::operator<<(const String &str)
 {
-	return this->append(str);
+	m_str += str.m_str;
+	return (*this);
 }
 
 e2d::String & e2d::String::operator<<(const wchar_t *str)
 {
-	return this->append(str);
+	m_str += str;
+	return (*this);
 }
 
 e2d::String & e2d::String::operator<<(wchar_t *str)
 {
-	return this->append(str);
+	m_str += str;
+	return (*this);
 }
 
-e2d::String & e2d::String::operator<<(const char * value)
+e2d::String & e2d::String::operator<<(const char * cstr)
 {
-	return this->append(value);
+	m_str += static_cast<wchar_t*>(_bstr_t(cstr));
+	return (*this);
 }
 
-e2d::String & e2d::String::operator<<(char * value)
+e2d::String & e2d::String::operator<<(char * cstr)
 {
-	return this->append(value);
+	m_str += static_cast<wchar_t*>(_bstr_t(cstr));
+	return (*this);
+}
+
+e2d::String & e2d::String::operator<<(int value)
+{
+	(*this) += String::toString(value);
+	return (*this);
+}
+
+e2d::String & e2d::String::operator<<(unsigned int value)
+{
+	(*this) += String::toString(value);
+	return (*this);
+}
+
+e2d::String & e2d::String::operator<<(float value)
+{
+	(*this) += String::toString(value);
+	return (*this);
+}
+
+e2d::String & e2d::String::operator<<(double value)
+{
+	(*this) += String::toString(value);
+	return (*this);
 }
 
 e2d::String::operator const wchar_t*() const
@@ -352,36 +381,6 @@ void e2d::String::clear()
 	m_str.clear();
 }
 
-e2d::String & e2d::String::append(const wchar_t * str)
-{
-	m_str += str;
-	return *this;
-}
-
-e2d::String & e2d::String::append(wchar_t * str)
-{
-	m_str += str;
-	return *this;
-}
-
-e2d::String & e2d::String::append(const char * str)
-{
-	m_str += static_cast<wchar_t*>(_bstr_t(str));
-	return *this;
-}
-
-e2d::String & e2d::String::append(char * str)
-{
-	m_str += static_cast<wchar_t*>(_bstr_t(str));
-	return *this;
-}
-
-e2d::String & e2d::String::append(const e2d::String & str)
-{
-	m_str += str.m_str;
-	return (*this);
-}
-
 std::wostream & e2d::operator<<(std::wostream &cout, const String &str)
 {
 	cout << str.m_str;
diff --git a/core/ecommon.h b/core/ecommon.h
index 525dbd63..b2cb3609 100644
--- a/core/ecommon.h
+++ b/core/ecommon.h
@@ -111,35 +111,6 @@ public:
 	// 获取 ANSI 字符串
 	std::string getCString() const;
 
-	// 后接字符串
-	String& append(
-		const String &str
-	);
-
-	// 后接字符串
-	String& append(
-		const char * cstr
-	);
-
-	// 后接字符串
-	String& append(
-		char * cstr
-	);
-
-	// 后接字符串
-	String& append(
-		const wchar_t *str
-	);
-
-	// 后接字符串
-	String& append(
-		wchar_t *str
-	);
-
-	// 后接字符串
-	template<typename T>
-	String& append(const T &value);
-
 	// 获取裁剪字符串
 	String subtract(
 		int offset,		/* 偏移量 */
@@ -211,17 +182,19 @@ public:
 	bool operator< (const String &) const;
 	bool operator<= (const String &) const;
 
-	// << 运算符
+	// << 运算符（后接字符串）
 	String& operator<< (const String &);
 	String& operator<< (const char *);
 	String& operator<< (char *);
 	String& operator<< (const wchar_t *);
 	String& operator<< (wchar_t *);
-	template<typename T>
-	String& operator<< (const T value) { return this->append<>(value); }
+	String& operator<< (int value);
+	String& operator<< (unsigned int value);
+	String& operator<< (float value);
+	String& operator<< (double value);
 
 	// 其他运算符
-	wchar_t &operator[] (int);
+	wchar_t& operator[] (int);
 
 	friend std::ostream& operator<< (std::ostream &, const String &);
 	friend std::wostream& operator<< (std::wostream &, const String &);
@@ -734,14 +707,6 @@ protected:
 };
 
 // String 类模板函数定义
-template<typename T>
-inline e2d::String & e2d::String::append(const T & value)
-{
-	std::wostringstream ss;
-	ss << value;
-	m_str += ss.str();
-	return (*this);
-}
 
 template<typename T>
 inline e2d::String e2d::String::toString(const T value)