初始提交，未完全测试

template/source/StringSource.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python3.9
+# -*- coding: utf-8 -*-
+"""
+JFinal StringSource - String Source
+"""
+
+class StringSource:
+    """String source for template loading"""
+    
+    def __init__(self, content: str, cache_key: str = None):
+        """
+        Initialize string source
+        
+        Args:
+            content: Template content
+            cache_key: Cache key (optional)
+        """
+        self._content = content
+        self._cache_key = cache_key
+    
+    def get_content(self) -> str:
+        """
+        Get string content
+        
+        Returns:
+            Content as string
+        """
+        return self._content
+    
+    def is_modified(self) -> bool:
+        """
+        Check if content has been modified
+        
+        Returns:
+            Always False for string sources
+        """
+        return False
+    
+    def get_cache_key(self) -> str:
+        """
+        Get cache key
+        
+        Returns:
+            Cache key
+        """
+        return self._cache_key
+    
+    def __repr__(self) -> str:
+        content_preview = self._content[:50] + "..." if len(self._content) > 50 else self._content
+        return f"StringSource('{content_preview}')"