我有相同的任务要从Java端的模板获取变量列表，除了使用反射之外，没有找到任何好的方法。我不确定是否有更好的方法来获取此数据，但这是我的方法：
public Set<String> referenceSet(Template template) throws TemplateModelException { Set<String> result = new HashSet<>(); TemplateElement rootTreeNode = template.getRootTreeNode(); for (int i = 0; i < rootTreeNode.getChildCount(); i++) { TemplateModel templateModel = rootTreeNode.getChildNodes().get(i); if (!(templateModel instanceof StringModel)) { continue; } Object wrappedObject = ((StringModel) templateModel).getWrappedObject(); if (!"DollarVariable".equals(wrappedObject.getClass().getSimpleName())) { continue; } try { Object expression = getInternalState(wrappedObject, "expression"); switch (expression.getClass().getSimpleName()) { case "Identifier": result.add(getInternalState(expression, "name").toString()); break; case "DefaultToexpression": result.add(getInternalState(expression, "lho").toString()); break; case "BuiltinVariable": break; default: throw new IllegalStateException("Unable to introspect variable"); } } catch (NoSuchFieldException | IllegalAccessException e) { throw new TemplateModelException("Unable to reflect template model"); } } return result;}private Object getInternalState(Object o, String fieldName) throws NoSuchFieldException, IllegalAccessException { Field field = o.getClass().getDeclaredField(fieldName); boolean wasAccessible = field.isAccessible(); try { field.setAccessible(true); return field.get(o); } finally { field.setAccessible(wasAccessible); }}我为演示模板自省所做的示例项目可以在github上找到：https
:
//github.com/SimY4/TemplatesPOC.git
