初始提交，未完全测试

template/stat/ast/Output.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3.9
+# -*- coding: utf-8 -*-
+"""
+JFinal Output - Output Directive
+"""
+
+from .Stat import Stat
+from ..Scope import Scope
+from ...Env import Env
+from ...expr.ast import ExprList
+
+class Output(Stat):
+    """Output directive for template expressions"""
+    
+    def __init__(self, expr_list: ExprList):
+        """
+        Initialize output directive
+        
+        Args:
+            expr_list: Expression list to evaluate
+        """
+        self._expr_list = expr_list
+    
+    def exec(self, env: Env, scope: Scope, writer) -> None:
+        """
+        Execute output directive
+        
+        Args:
+            env: Template environment
+            scope: Execution scope
+            writer: Output writer
+        """
+        if self._expr_list:
+            result = self._expr_list.eval(scope)
+            if result is not None:
+                if hasattr(writer, 'write'):
+                    writer.write(str(result))
+    
+    def __repr__(self) -> str:
+        return f"Output({self._expr_list})"