solve PR requested

Author: nothingzhl

src/main/java/org/apache/ibatis/parsing/XNode.java

@@ -154,23 +154,23 @@ public Long getLongBody() {
   }
 
   public Long getLongBody(Long def) {
-    return body == null ? def : Long.parseLong(body);
+    return body == null ? def : Long.valueOf(body);
   }
 
   public Double getDoubleBody() {
     return getDoubleBody(null);
   }
 
   public Double getDoubleBody(Double def) {
-    return body == null ? def : Double.parseDouble(body);
+    return body == null ? def : Double.valueOf(body);
   }
 
   public Float getFloatBody() {
     return getFloatBody(null);
   }
 
   public Float getFloatBody(Float def) {
-    return body == null ? def : Float.parseFloat(body);
+    return body == null ? def : Float.valueOf(body);
   }
 
   public <T extends Enum<T>> T getEnumAttribute(Class<T> enumType, String name) {