spring 启动 2 中未识别 MappingJackson2HttpMessageConverter 配置

Question

我使用 spring 已经有一段时间了，在我的 spring boot 1.5x 项目中总是处理 LazyInitializationException 下一个配置（楼下），但现在我我正在使用 spring boot 2 创建一个新项目，并且无法识别比 WebMvcConfigurer 更远的相同配置，现在替换为已弃用的 WebMvcConfigurerAdapter.

我的配置：

@Configuration
public class WebMvcConfiguration implements WebMvcConfigurer {
    @Override
        public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
            converters.add(jacksonMessageConverter());
            WebMvcConfigurer.super.configureMessageConverters(converters);
        }
        public MappingJackson2HttpMessageConverter jacksonMessageConverter() {
            MappingJackson2HttpMessageConverter messageConverter =
                    new MappingJackson2HttpMessageConverter();
    
            List<MediaType> supportedMediaTypes=new ArrayList<>();
            supportedMediaTypes.add(MediaType.APPLICATION_JSON);
            supportedMediaTypes.add(MediaType.TEXT_PLAIN);
            messageConverter.setSupportedMediaTypes(supportedMediaTypes);
    
            ObjectMapper mapper = new ObjectMapper();
            mapper.registerModule(new Hibernate5Module());
            messageConverter.setObjectMapper(mapper);
    
            messageConverter.setPrettyPrint(true);
    
            return messageConverter;
        }
}

但在那之后我得到一个错误：

[WARN ] 2018-08-18 20:07:08.694 DESKTOP-ABFFHEJ --- [nio-8080-exec-7] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to write HTTP message: org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: could not initialize proxy [com.ideatik.domain.TipoUsuario#3] - no Session; nested exception is com.fasterxml.jackson.databind.JsonMappingException: could not initialize proxy [com.ideatik.domain.TipoUsuario#3] - no Session (through reference chain: com.ideatik.domain.Usuario["tipoUsuario"]->com.ideatik.domain.TipoUsuario_$$_jvst9b7_2["nombre"])
[WARN ] 2018-08-18 20:07:08.695 DESKTOP-ABFFHEJ --- [nio-8080-exec-7] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved exception caused by Handler execution: org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: could not initialize proxy [com.ideatik.domain.TipoUsuario#3] - no Session; nested exception is com.fasterxml.jackson.databind.JsonMappingException: could not initialize proxy [com.ideatik.domain.TipoUsuario#3] - no Session (through reference chain: com.ideatik.domain.Usuario["tipoUsuario"]->com.ideatik.domain.TipoUsuario_$$_jvst9b7_2["nombre"])

Answer 1

尝试在方法中添加@Bean

@Bean
public MappingJackson2HttpMessageConverter jacksonMessageConverter() {
   .....
}

spring 启动 2 中未识别 MappingJackson2HttpMessageConverter 配置

MappingJackson2HttpMessageConverter configuration is not being recognized in spring boot 2

java

spring

hibernate

spring-boot

jackson-databind