jackson kt module

2022-11-02

java

儿童在学校的相似,是强制的结果。一旦毕业,强制随即结束。——爱尔维修

我们在使用jackson时,如果项目还包含kotlin,则会有警告

image-20221102125512617

此时需要引入依赖

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<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-kotlin</artifactId>
<version>2.11.3</version>
</dependency>

并添加module

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import com.fasterxml.jackson.module.kotlin.KotlinModule;

/**
* web配置类
*
* @author <achao1441470436@gmail.com>
* @since 2021/5/18 0018 14:52
*/
@Configuration
@EnableWebMvc
public class WebConfig implements WebMvcConfigurer {

/**
* @param converters 转换器
* @author <achao1441470436@gmail.com>
* @since 2021/5/21 0021 15:08
*/
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
ObjectMapper objectMapper = new ObjectMapper();
// 添加kotlin模块
objectMapper.registerModule(new KotlinModule());
objectMapper.setTimeZone(TimeZone.getTimeZone("GMT+8"));
SimpleModule simpleModule = new SimpleModule();
simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
objectMapper.registerModule(simpleModule);

JavaTimeModule module = new JavaTimeModule();
module.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATETIME_PATTERN)));
module.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATE_PATTERN)));
module.addSerializer(new LocalDateSerializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATE_PATTERN)));
module.addSerializer(new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATETIME_PATTERN)));
objectMapper.setDateFormat(new SimpleDateFormat(DatePattern.NORM_DATETIME_PATTERN));
objectMapper.registerModule(module);

objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
objectMapper.configure(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT, true);

jackson2HttpMessageConverter.setObjectMapper(objectMapper);
converters.add(jackson2HttpMessageConverter);
}
}