从泛型类型获取类

Question

how can I call .class Or how can I get class from following generic type

 headerMap.put("accept", MediaType.APPLICATION_JSON_VALUE);
     ResponseEntity<PaginationResponse<Category>> response =
     restClient.getResource(url, headerMap, **PaginationResponse<Category>.class**);
     LOGGER.info("Method getAllCategories() - END");

It shows error

Answer 1

As far as I know the information is not avaiable at runtime. But perhaps, you can use some ideas from Get generic type of class at runtime .

Answer 2

No, you cannot.

The generic type T is not kept at runtime because of Type Erasure .

However, if you still want to do it

public class Foo<T> 
{
    private Class<T> type;

    public Foo(Class<T> type) { 
        this.type = type; 
    }
}

Answer 3

我使用此解决方案进行通用类型类解释，而Spring实现在此处用于Rest Template