--- old/src/java.xml.crypto/share/classes/com/sun/org/apache/xml/internal/security/utils/RFC2253Parser.java	2014-08-26 11:22:42.000000000 +0800
+++ new/src/java.xml.crypto/share/classes/com/sun/org/apache/xml/internal/security/utils/RFC2253Parser.java	2014-08-26 11:22:41.000000000 +0800
@@ -88,7 +88,7 @@
                 l += countQuotes(DN, j, k);
 
                 if ((k > 0) && (DN.charAt(k - 1) != '\\') && (l % 2) == 0) {
-                    sb.append(parseRDN(DN.substring(i, k).trim(), toXml) + ",");
+                    sb.append(parseRDN(DN.substring(i, k).trim(), toXml)).append(',');
 
                     i = k + 1;
                     l = 0;
@@ -121,7 +121,7 @@
             l += countQuotes(str, j, k);
 
             if ((k > 0) && (str.charAt(k - 1) != '\\') && (l % 2) == 0) {
-                sb.append(parseATAV(trim(str.substring(i, k)), toXml) + "+");
+                sb.append(parseATAV(trim(str.substring(i, k)), toXml)).append('+');
 
                 i = k + 1;
                 l = 0;
@@ -369,7 +369,7 @@
         int k;
 
         for (int j = 0; (k = string.indexOf("\\20", j)) >= 0; j = k + 3) {
-            sb.append(trim(string.substring(i, k)) + "\\ ");
+            sb.append(trim(string.substring(i, k))).append("\\ ");
 
             i = k + 3;
         }
@@ -418,7 +418,7 @@
             l += countQuotes(str, j, k);
 
             if ((k > 0) && (str.charAt(k - 1) != '\\') && (l % 2) == 0) {
-                sb.append(trim(str.substring(i, k)) + replace);
+                sb.append(trim(str.substring(i, k))).append(replace);
 
                 i = k + 1;
                 l = 0;