java - 使用 TransformerFactory 的 XSLT Transformer 增加元空间

Question

当我使用多个不同的请求运行以下代码时，java 元空间正在增加。

        public String applyXsltOnXml(String xmlString, String xsltInput) throws TransformerException {
         String result = null;
         try (StringReader stringReader = new StringReader(xmlString);
                 StringWriter writer = new StringWriter()) {
             TransformerFactory factory = TransformerFactory.newInstance();
             Transformer transformer = factory.newTransformer(new StreamSource(new StringReader(xsltInput)));
             transformer.transform(new StreamSource(stringReader), new StreamResult(writer));
             result = writer.toString();
         } 
         return result;
     }

你能解释一下幕后发生的事情吗？为什么 java 元空间越来越大？