NoSuchBeanDefinitionException[重复]

Question

我开发了一个从REST API获取访问令牌的简单类。它还没有完全实现，但它的想法是将令牌持久化到数据库中。我还有一个函数来检查是否有任何可用的令牌，如果没有，它就调用获取新令牌的函数。我还开发了一个单元测试来检查我是否获得了令牌。

我在运行测试时遇到了一个问题，NoSuchBeanDefinitionException问题。我不知道我做错了什么。我对Spring boot还很陌生，所以感谢所有的帮助。下面是我的测试和与RESTendpoint通信的类的代码。

package com.foo.receivable.domain.token;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.*;
import org.springframework.web.client.RestTemplate;

import java.time.LocalDateTime;
import java.util.Arrays;

public class TokenIntegration {

    static final String GET_TOKEN_URI = "";

    static final String API_CLIENT_ID = "";
    static final String API_CLIENT_SECRET = "";
    static final String API_AUDIENCE = "";
    static final String API_GRANT_TYPE = "";

    @Autowired
    private RestTemplate restTemplate;
    private TokenRepository repository;

    private Token API_RetrieveToken(){
        Token t = new Token();
        try {
            HttpHeaders headers = new HttpHeaders();
            headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
            headers.set("client_id", API_CLIENT_ID);
            headers.set("client_secrect", API_CLIENT_SECRET);
            headers.set("audience", API_AUDIENCE);
            headers.set("grant_type", API_GRANT_TYPE);

            HttpEntity<String> entity = new HttpEntity<>(headers);
            ResponseEntity<String> response = restTemplate.exchange(GET_TOKEN_URI, HttpMethod.POST, entity, String.class);
//not implemented yet

        }catch(Exception e){
            e.printStackTrace();
        }
        return t;
    }

    public Token GetAccessToken(){
        Token token;
        try {
            token = repository.findByExpired(LocalDateTime.now());
            if(token == null){
                token = API_RetrieveToken();
            }
        }
        catch (Exception e){
            token = null;
            e.printStackTrace();
        }
        return token;
    }
}

package com.foo.receivable.domain.token;

import com.foo.receivable.infra.AbstractTest;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class TokenIntegrationTest  extends AbstractTest {

@Autowired
private TokenIntegration integration;

@Test
void ShouldReturnTokenObject(){
    final Token token = integration.GetAccessToken();
    if(token == null){
        //not implemented yet
    }
    assertEquals(Token.class, token.getClass());
}
}

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'com.foo.receivable.domain.token.TokenIntegrationTest': Unsatisfied dependency expressed through field 'integration'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.foo.receivable.domain.token.TokenIntegration' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

编辑：问题是@component注释丢失，因此spring无法将我的TokenIntegration类识别为bean。在我更改它之后，我得到了另一个关于RestTemplate bean的错误。在这方面有什么帮助吗？

***************************
APPLICATION FAILED TO START
***************************

Description:

Field restTemplate in com.foo.receivable.domain.token.TokenIntegration required a bean of type 'org.springframework.web.client.RestTemplate' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'org.springframework.web.client.RestTemplate' in your configuration.

2021-05-10 11:44:50.801 ERROR 19916 --- [           main] o.s.test.context.TestContextManager      : Caught exception while allowing TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener@70ab2d48] to prepare test instance [com.foo.receivable.domain.token.TokenIntegrationTest@22a9170c]

java.lang.IllegalStateException: Failed to load ApplicationContext

Answer 1

您需要定义spring要注入的类。您既可以用xml也可以用Anotation来完成。PS：

@Service
public class TokenIntegration {
}