diff --git a/library/think/cache/driver/Lite.php b/library/think/cache/driver/Lite.php
index 551359f7..0a3a838b 100644
--- a/library/think/cache/driver/Lite.php
+++ b/library/think/cache/driver/Lite.php
@@ -36,8 +36,8 @@ class Lite
         if (!empty($options)) {
             $this->options = array_merge($this->options, $options);
         }
-        if (substr($this->options['path'], -1) != '/') {
-            $this->options['path'] .= '/';
+        if (substr($this->options['path'], -1) != DS) {
+            $this->options['path'] .= DS;
         }
 
     }
diff --git a/library/think/db/builder/Mysql.php b/library/think/db/builder/Mysql.php
index d7427af7..84853307 100644
--- a/library/think/db/builder/Mysql.php
+++ b/library/think/db/builder/Mysql.php
@@ -31,7 +31,7 @@ class Mysql extends Builder
         $key = trim($key);
         if (strpos($key, '$.') && false === strpos($key, '(')) {
             // JSON字段支持
-            list($field, $name) = explode($key, '$.');
+            list($field, $name) = explode('$.', $key);
             $key                = 'jsn_extract(' . $field . ', \'$.\'.' . $name . ')';
         }
         if (!preg_match('/[,\'\"\*\(\)`.\s]/', $key)) {