Question

在我的程序中，我尝试连接两台服务器。当它们处于不同的项目中时，两种连接都可以完美地工作。然而，当他们在同一个maven项目中时，我在连接过程中遇到了异常。

在我的情况下，当我在我的pom中添加这个依赖

<dependency>
    <groupId>com.amazonaws</groupId>
    <artifactId>aws-java-sdk</artifactId>
    <version>1.9.35</version>
</dependency>

我可以毫无问题地连接到亚马逊服务器。但是，我无法连接到另一台服务器（在我的情况下是Cloud Foundary）。我有这个例外：

Exception in thread "main" org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Can not construct instance of org.springframework.security.oauth2.common.OAuth2AccessToken, problem: abstract types either need to be mapped to concrete types, have custom deserializer, or be instantiated with additional type information
 at [Source: org.apache.http.conn.EofSensorInputStream@3eb77ea8; line: 1, column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of org.springframework.security.oauth2.common.OAuth2AccessToken, problem: abstract types either need to be mapped to concrete types, have custom deserializer, or be instantiated with additional type information
 at [Source: org.apache.http.conn.EofSensorInputStream@3eb77ea8; line: 1, column: 1]
    at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.readInternal(MappingJackson2HttpMessageConverter.java:126)
    at org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:153)
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:81)
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:454)
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:417)
    at org.springframework.security.oauth2.client.token.OAuth2AccessTokenSupport.retrieveToken(OAuth2AccessTokenSupport.java:102)
    at org.springframework.security.oauth2.client.token.grant.password.ResourceOwnerPasswordAccessTokenProvider.obtainAccessToken(ResourceOwnerPasswordAccessTokenProvider.java:47)
    at org.cloudfoundry.client.lib.oauth2.OauthClient.getToken(OauthClient.java:66)
    at org.cloudfoundry.client.lib.rest.CloudControllerClientImpl.login(CloudControllerClientImpl.java:626)
    at org.cloudfoundry.client.lib.CloudFoundryClient.login(CloudFoundryClient.java:149)
    at telecom.sudparis.eu.paas.core.server.ressources.manager.application.TestErrors.main(TestErrors.java:27)
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of org.springframework.security.oauth2.common.OAuth2AccessToken, problem: abstract types either need to be mapped to concrete types, have custom deserializer, or be instantiated with additional type information
 at [Source: org.apache.http.conn.EofSensorInputStream@3eb77ea8; line: 1, column: 1]
    at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:164)
    at com.fasterxml.jackson.databind.DeserializationContext.instantiationException(DeserializationContext.java:716)
    at com.fasterxml.jackson.databind.deser.AbstractDeserializer.deserialize(AbstractDeserializer.java:140)
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:2993)
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2158)
    at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.readInternal(MappingJackson2HttpMessageConverter.java:123)
    ... 10 more

但是，当我删除此依赖项时，我不会遇到连接到Cloud Foudary的问题。但是，我使用了aws类的错误。

我的问题是。如何在没有此异常的情况下添加两个依赖项？

Maven中两个依赖项的不兼容性

0 个答案: