From a34406a60003ecd1e457402dae639d78dbcd4477 Mon Sep 17 00:00:00 2001
From: xiaohuo <et.tw@163.com>
Date: Thu, 14 Feb 2019 16:29:35 +0800
Subject: [PATCH] v2.3.0

---
 .../java/org/seimicrawler/xpath/core/XpathProcessor.java | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/seimicrawler/xpath/core/XpathProcessor.java b/src/main/java/org/seimicrawler/xpath/core/XpathProcessor.java
index c5e80e4..74661f8 100644
--- a/src/main/java/org/seimicrawler/xpath/core/XpathProcessor.java
+++ b/src/main/java/org/seimicrawler/xpath/core/XpathProcessor.java
@@ -474,7 +474,14 @@ public XValue visitUnionExprNoRoot(XpathParser.UnionExprNoRootContext ctx) {
                 throw new XpathMergeValueException("can not merge val1="+pathExprNoRoot.asDouble()+",val2="+unionExprNoRoot.asString());
             }
         }else {
-            return XValue.create(pathExprNoRoot.asString()+","+unionExprNoRoot.asString());
+            List<String> tmpVal = new LinkedList<>();
+            if (StringUtils.isNotBlank(pathExprNoRoot.asString())){
+                tmpVal.add(pathExprNoRoot.asString());
+            }
+            if (StringUtils.isNotBlank(unionExprNoRoot.asString())){
+                tmpVal.add(unionExprNoRoot.asString());
+            }
+            return XValue.create(StringUtils.join(tmpVal,","));
         }
     }