1、引入lombok支持，重构JavaBean 将 常规getter/setter去除

2、去除Gson 依赖

src/main/java/net/tccn/base/MetaRender.java

@@ -22,8 +22,9 @@ public class MetaRender implements HttpRender<HttpScope> {
 
     @Override
     public <V extends HttpScope> void renderTo(HttpRequest request, HttpResponse response, Convert convert, V scope) {
+        String referid = scope.getReferid();
         Map<String, Object> attr = scope.getAttributes();
-        if ("excel".equals(scope.getReferid())) {
+        if ("excel".equals(referid)) {
             List list = (List) attr.get("data");
             Kv heads = (Kv) attr.get("heads");
             String fileName = (String) attr.get("fileName");