类似于这个问题，我想在两个微服务之间交换信息。然而不同的是，我的泛型是一个抽象类，因此我遇到了麻烦。
我的班级是这样的：

public <T extends Account> Page<T> getAllAccounts() {   // not working
    ParameterizedTypeReference<Page<T>> responseType = new ParameterizedTypeReference<Page<T>>() { };
    ResponseEntity<Page<T>> result = restTemplate.exchange("http://localhost:8080/api/v1/accounts/", HttpMethod.GET, null, responseType);

    Page<T> accounts = result.getBody();

    return accounts;
}

api调用后面的函数具有返回类型 public <T extends Account> Page<T> getAccounts...) {..} . t可以是扩展帐户的所有内容，因为有几个“帐户”是可能的。
给定的方法也适用于非抽象类（例如。 Page<CustomerAccount> )但是，对于抽象类则不是。
如果我尝试调用该函数，会收到以下错误消息：

This application has no explicit mapping for /error, so you are seeing this as a fallback.
Fri Dec 18 14:55:33 CET 2020
There was an unexpected error (type=Internal Server Error, status=500).
Type definition error: [simple type, class org.springframework.data.domain.Page]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `org.springframework.data.domain.Page` (no Creators, like default constructor, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information at [Source: (PushbackInputStream); line: 1, column: 1]
org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class org.springframework.data.domain.Page]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `org.springframework.data.domain.Page` (no Creators, like default constructor, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information
 at [Source: (PushbackInputStream); line: 1, column: 1]
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:282)
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:243)
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:105)
    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:1034)
    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:1017)
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:777)
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:710)
    at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:630)
    at de.rwth.swc.lab.ws2021.daifu.businesslogic.services.AccountService.getAllAccounts(AccountService.java:50)
    at de.rwth.swc.lab.ws2021.daifu.businesslogic.api.AccountController.getAllAccounts(AccountController.java:47)
... (rest shortend for better readability)

问题
如何从端口8081与在端口8080上运行的ms进行通信，并使用“抽象泛型”（我认为您称它们为不同的，但idk atm:d）