diff --git a/include/of_path.h b/include/of_path.h
index 2a012c8..a003148 100644
--- a/include/of_path.h
+++ b/include/of_path.h
@@ -19,6 +19,7 @@ public:
     static ofString get_full(const ofString& path, const ofString& sub_file_path);
     static bool exist(const ofString& path);
     static bool write(const ofString& path, const char* data, int len);
+    static ofString to_full(const ofString& path);
 };
 };   // namespace ofen
 #endif
\ No newline at end of file
diff --git a/include/of_str.h b/include/of_str.h
index f31b6f1..0a6698a 100644
--- a/include/of_str.h
+++ b/include/of_str.h
@@ -10,11 +10,12 @@ class COfStr
 public:
     COfStr();
     ~COfStr();
+
 public:
     static ofString replace(const ofString& str, const ofString& from, const ofString& to);
     static std::vector<ofString> split(const ofString& input, const ofString& delimiter);
+    static ofString trim(const ofString& input);
 };
 };   // namespace ofen
 
-
 #endif
\ No newline at end of file
diff --git a/include/of_util.h b/include/of_util.h
index f072b2d..e85d023 100644
--- a/include/of_util.h
+++ b/include/of_util.h
@@ -38,6 +38,14 @@ private:
 template <typename T> std::shared_ptr<T> OfSingleton<T>::instance = nullptr;
 template <typename T> std::once_flag OfSingleton<T>::init_flag;
 
+class OfUtil {
+public:
+    OfUtil();
+    ~OfUtil();
+public:
+    static ofString now_time();
+};
+
 class CMutBuffer
 {
 public:
diff --git a/src/of_path.cpp b/src/of_path.cpp
index 55d3298..9ad65b4 100644
--- a/src/of_path.cpp
+++ b/src/of_path.cpp
@@ -1,7 +1,7 @@
 #include "of_path.h"
+#include "of_str.h"
 #include <filesystem>
 #include <fstream>
-#include "of_str.h"
 
 #ifdef _WIN32
 #include <windows.h>
@@ -139,4 +139,21 @@ bool COfPath::write(const ofString& path, const char* data, int len)
     return true;
 }
 
+ofString COfPath::to_full(const ofString& path)
+{
+    fs::path base;
+    if (fs::path(path).is_relative()) {
+        base = fs::current_path();
+        base.append(path);
+    } else {
+        base = fs::path(path);
+    }
+    fs::path ret = fs::absolute(base);
+#ifdef UNICODE_OFSTR
+    return ofString(ret.wstring());
+#else
+    return ofString(ret.string());
+#endif
+}
+
 }   // namespace ofen
diff --git a/src/of_str.cpp b/src/of_str.cpp
index fea283e..470abe4 100644
--- a/src/of_str.cpp
+++ b/src/of_str.cpp
@@ -31,4 +31,13 @@ std::vector<ofString> COfStr::split(const ofString& input, const ofString& delim
     result.push_back(input.substr(prev));
     return result;
 }
+ofString COfStr::trim(const ofString& input)
+{
+    size_t start = input.find_first_not_of(" \t\n\r\f\v");
+    if (start == std::string::npos) {
+        return "";
+    }
+    size_t end = input.find_last_not_of(" \t\n\r\f\v");
+    return input.substr(start, end - start + 1);
+}
 }   // namespace ofen
diff --git a/src/of_util.cpp b/src/of_util.cpp
index 5ca54ad..f5bbdc5 100644
--- a/src/of_util.cpp
+++ b/src/of_util.cpp
@@ -1,4 +1,7 @@
 #include "of_util.h"
+#include <chrono>
+#include <iomanip>
+#include <sstream>
 
 namespace ofen {
 void CMutBuffer::push(const char* data, int len)
@@ -43,4 +46,24 @@ void CMutBuffer::clear()
     std::lock_guard<std::mutex> lock(mutex_);
     buffer_.clear();
 }
+OfUtil::OfUtil()
+{
+}
+OfUtil::~OfUtil()
+{
+}
+ofString OfUtil::now_time()
+{
+    auto now = std::chrono::system_clock::now();
+    auto time_t_now = std::chrono::system_clock::to_time_t(now);
+    std::tm tm_now;
+#if defined(_WIN32) || defined(_WIN64)
+    localtime_s(&tm_now, &time_t_now);
+#else
+    localtime_r(&time_t_now, &tm_now);
+#endif
+    std::ostringstream oss;
+    oss << std::put_time(&tm_now, "%Y-%m-%d %H:%M:%S");
+    return oss.str();
+}
 }   // namespace ofen