目录
一、JacksonObjectMapperConfiguration
创建@Bean ObjectMapper ，通过Jackson2ObjectMapperBuilder
@Configuration(proxyBeanMethods = false)
@ConditionalOnClass(Jackson2ObjectMapperBuilder.class)
static class JacksonObjectMapperConfiguration {
@Bean
@Primary
@ConditionalOnMissingBean
ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {
return builder.createXmlMapper(false).build();
}
}
二、JacksonObjectMapperBuilderConfiguration
创建@Bean Jackson2ObjectMapperBuilder，通过Jackson2ObjectMapperBuilderCustomizer实现定制化
@Configuration(proxyBeanMethods = false)
@ConditionalOnClass(Jackson2ObjectMapperBuilder.class)
static class JacksonObjectMapperBuilderConfiguration {
@Bean
@Scope("prototype")
@ConditionalOnMissingBean
Jackson2ObjectMapperBuilder jacksonObjectMapperBuilder(ApplicationContext applicationContext,
List<Jackson2ObjectMapperBuilderCustomizer> customizers) {
Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
builder.applicationContext(applicationContext);
//实现定制化
customize(builder, customizers);
return builder;
}
private void customize(Jackson2ObjectMapperBuilder builder,
List<Jackson2ObjectMapperBuilderCustomizer> customizers) {
for (Jackson2ObjectMapperBuilderCustomizer customizer : customizers) {
//调用Jackson2ObjectMapperBuilderCustomizer 的customize()
customizer.customize(builder);
}
}
}
三、Jackson2ObjectMapperBuilderCustomizerConfiguration
创建@Bean StandardJackson2ObjectMapperBuilderCustomizer
注入参数 JacksonProperties
@Configuration(proxyBeanMethods = false)
@ConditionalOnClass(Jackson2ObjectMapperBuilder.class)
@EnableConfigurationProperties(JacksonProperties.class)
static class Jackson2ObjectMapperBuilderCustomizerConfiguration {
@Bean
StandardJackson2ObjectMapperBuilderCustomizer standardJacksonObjectMapperBuilderCustomizer(
ApplicationContext applicationContext, JacksonProperties jacksonProperties) {
return new StandardJackson2ObjectMapperBuilderCustomizer(applicationContext, jacksonProperties);
}
}
四、StandardJackson2ObjectMapperBuilderCustomizer
实现了Jackson2ObjectMapperBuilderCustomizer，并通过配置文件配置JacksonProperties 的属性来实现定制化
static final class StandardJackson2ObjectMapperBuilderCustomizer
implements Jackson2ObjectMapperBuilderCustomizer, Ordered {
private final ApplicationContext applicationContext;
private final JacksonProperties jacksonProperties;
StandardJackson2ObjectMapperBuilderCustomizer(ApplicationContext applicationContext,
JacksonProperties jacksonProperties) {
this.applicationContext = applicationContext;
this.jacksonProperties = jacksonProperties;
}
@Override
public int getOrder() {
return 0;
}
@Override
//定制化的方法
public void customize(Jackson2ObjectMapperBuilder builder) {
if (this.jacksonProperties.getDefaultPropertyInclusion() != null) {
builder.serializationInclusion(this.jacksonProperties.getDefaultPropertyInclusion());
}
if (this.jacksonProperties.getTimeZone() != null) {
builder.timeZone(this.jacksonProperties.getTimeZone());
}
configureFeatures(builder, FEATURE_DEFAULTS);
configureVisibility(builder, this.jacksonProperties.getVisibility());
configureFeatures(builder, this.jacksonProperties.getDeserialization());
configureFeatures(builder, this.jacksonProperties.getSerialization());
configureFeatures(builder, this.jacksonProperties.getMapper());
configureFeatures(builder, this.jacksonProperties.getParser());
configureFeatures(builder, this.jacksonProperties.getGenerator());
configureDateFormat(builder);
configurePropertyNamingStrategy(builder);
configureModules(builder);
configureLocale(builder);
}
......
}
总结
可以通过实现Jackson2ObjectMapperBuilderCustomizer来定制化ObjectMapper 。