fix java types

Author: SentryMan

http-generator-core/src/main/java/io/avaje/http/generator/core/UType.java

@@ -202,7 +202,8 @@ public Set<String> importTypes() {
       Set<String> set = new LinkedHashSet<>();
       for (String type : allTypes) {
         if (!type.startsWith("java.lang.") && type.indexOf('.') > -1) {
-          set.add(innerTypesImport(type).replace("[]", ""));
+          if (type.startsWith("java")) set.add(type.replace("[]", ""));
+          else set.add(innerTypesImport(type).replace("[]", ""));
         }
       }
       return set;

http-generator-core/src/main/java/io/avaje/http/generator/core/Util.java

@@ -75,6 +75,8 @@ public static String shortName(String fullType) {
     int p = fullType.lastIndexOf('.');
     if (p == -1) {
       return fullType;
+    } else if (fullType.startsWith("java")) {
+      return fullType.substring(p + 1);
     } else {
       var result = "";
       var foundClass = false;