我有一个Spring Boot应用程序（2.0.3），它引发涉及objectMapper的循环引用错误（faster.xml Jackson实现，2.9.6）。使用Gradle（4.10.2）可以很好地构建它，但是在部署时会引发以下错误：
...; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'com.leroyjenkins.service.common.config.CommonConfig':
Unsatisfied dependency expressed through field 'objectMappers'; nested exception is
org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'objectMapper' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]:
Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException:
Failed to instantiate [com.fasterxml.jackson.databind.ObjectMapper]:
Circular reference involving containing bean 'org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration' -
consider declaring the factory method as static for independence from its containing instance. Factory method 'objectMapper' threw exception; nested exception is java.lang.NullPointerException",
"\tat org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760)",
CommonConfig指的是我拥有的配置文件：
@Configuration
@EnableHypermediaSupport(type = .
EnableHypermediaSupport.HypermediaType.HAL)
@EnableScheduling
@Order(Ordered.LOWEST_PRECEDENCE)
@CompileStatic
@Slf4j
@Slf4jPlusMetrics("mlog")
class CommonConfig {
...
@Autowired List<ObjectMapper> objectMappers
@PostConstruct
void afterPropertiesSet() {
log.info("initializing CommonConfig objectMappersSize={},contextPath={},threadPoolSize={},threadPoolQueueCapacity={},threadPoolDefaultTimeout={},appName={}",
objectMappers.size(), contextPath, threadPoolSize, threadPoolQueueCapacity, threadPoolDefaultTimeout, appName)
objectMappers.each { ObjectMapper objectMapper ->
objectMapper.enable(SerializationFeature.INDENT_OUTPUT)
objectMapper.registerModule(new ParameterNamesModule())
objectMapper.registerModule(new Jdk8Module())
objectMapper.registerModule(new JavaTimeModule())
objectMapper.registerModule(new JodaModule())
objectMapper.registerModule(new GsnModelJacksonModule())
objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false)
}
}
...
}
我们刚刚更新为jdk11 ...不确定此处是否相关。