支持Spring和ibatis

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@425 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/main/java/com/alibaba/druid/proxy/jdbc/ClobProxyImpl.java

@@ -118,5 +118,9 @@ public class ClobProxyImpl implements ClobProxy {
     public void truncate(long len) throws SQLException {
         createChain().clob_truncate(this, len);
     }
+    
+    public String toString() {
+        return clob.toString();
+    }
 
 }