自定义Jackson2ObjectMapperBuilder在集成springboot测试中无法识别

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我在我的主要Spring Boot应用程序类中定制了Jackson2ObjectMapperBuilder，如下所示。

public static void main(String[] args) {
    SpringApplication.run(Application.class, args);
}

@Autowired
public void configureJackson(Jackson2ObjectMapperBuilder builder) {
    builder.filters( new SimpleFilterProvider().addFilter( "customFilter", new ExampleFilter() ) );
}

其中，ExampleFilter是SimpleBeanPropertyFilter的扩展。我的POJO是用Jackson的@JsonFilter（“customFilter”）注释的
我使用@RestController和@GetMapping注释通过HTTP公开了POJO。这很好，当我运行应用程序并访问endpoint时，会调用自定义过滤器。

现在我编写了一个集成测试，如下所示。

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class IntegrationTest {

    @LocalServerPort
    private int port;

    @Autowired
    private TestRestTemplate restTemplate;

    @Test
    public void getUser() throws Exception {
        POJO obj = this.restTemplate.getForObject("http://localhost:" + this.port + "/pojo", POJO.class);

        Assertions.assertThat(obj).isNotNull();
        Assertions.assertThat(obj.getFirstName()).isEqualTo("Jane");
        Assertions.assertThat(obj.getLastName()).isEqualTo("Doe");
        Assertions.assertThat(obj.getAge()).isEqualTo("24");
    }
}

当我运行测试时，obj为null，我看到一个错误，没有配置FilterProvider

Failed to write HTTP message: org.springframework.http.converter.HttpMessageNotWritableException: Could not write content: Can not resolve PropertyFilter with id 'customFilter'; no FilterProvider configured; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not resolve PropertyFilter with id 'customFilter'; no FilterProvider configured

我做错了什么，如何纠正？

我的文件夹结构是：
src/main/java/com/a/b/c/Application。java
src/main/java/com/a/b/c/controller/ControllerA。JAVA

src/test/java/com/a/b/c/controller/IntegrationTest。JAVA

Answer 1

我通过在主应用程序文件中以略微不同的方式配置Jackson2ObjectMapperBuilder来实现这一点，如下所示。但我仍然不知道为什么Autowire方法不起作用。

@Bean
public Jackson2ObjectMapperBuilder objectMapperBuilder() {
    Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
    builder.filters( new SimpleFilterProvider().addFilter( "customFilter", new ExampleFilter() ) );
    return builder;
}

我仍然想知道，在测试环境中，为什么自动配置的Jackson2ObjectMapperBuilder在替换为@Bean时无法进行定制。