java - 显示地图的任何可能性在 apache wicket 表（DataView）中，没有获取密钥列表

Answer 1

Not really. But you can reduce the code passing the list of entries:

DataView<Entry<String, String>> dataView = new DataView<~>("displayPanel", new ListDataProvider(new ArrayList<Entry<String, String>(map.entrySet())) {
    @Override
    protected void populateItem(Item item) {
        Entry<String, String> entry = item.getModelObject();
        item.add(new Label("key_column", entry.getKey()));
        item.add(new Label("value_column", entry.getValue()));
    }
});