From e9db3711de75d5af71d2e4f43feb359e69f1be3e Mon Sep 17 00:00:00 2001
From: mxd <838425805@qq.com>
Date: Sun, 17 Nov 2019 12:52:03 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E8=A1=A8=E8=BE=BE=E5=BC=8F?=
 =?UTF-8?q?=E5=9C=A8xxx${expr}=E6=A0=BC=E5=BC=8F=E4=B8=AD=EF=BC=8Cexpr?=
 =?UTF-8?q?=E4=B8=BAnull=E6=97=B6=E6=95=B4=E4=B8=AA=E8=A1=A8=E8=BE=BE?=
 =?UTF-8?q?=E5=BC=8F=E8=BF=94=E5=9B=9Enull=E7=9A=84=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
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---
 .../spiderflow/core/expression/interpreter/AstInterpreter.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spider-flow-core/src/main/java/org/spiderflow/core/expression/interpreter/AstInterpreter.java b/spider-flow-core/src/main/java/org/spiderflow/core/expression/interpreter/AstInterpreter.java
index c4ed52f..093934c 100644
--- a/spider-flow-core/src/main/java/org/spiderflow/core/expression/interpreter/AstInterpreter.java
+++ b/spider-flow-core/src/main/java/org/spiderflow/core/expression/interpreter/AstInterpreter.java
@@ -47,7 +47,7 @@ public class AstInterpreter {
 			if(node instanceof Text){
 				result += node.getSpan().getText();
 			}else if(value == null){
-				if(i + 1 == n){
+				if(i ==	 0 && i + 1 == n){
 					return null;
 				}
 				result += "null";