更新后做 spring-boot 2.3.0 webflux webclient 忽略添加的 jackson2JsonDecoder

Question

在我更新到 spring-boot 2.3.0 之后（所以我的 webflux WebClient 现在是 5.2.6 版）自定义 ObjectMapper 被完全忽略。我的配置如下所示

public static WebClient buildWebClient(WebClient.Builder builder) {
    return builder
            .defaultHeader(ACCEPT, APPLICATION_JSON_VALUE)
            .defaultHeader(HttpHeaders.ACCEPT_ENCODING, "identity")
            .exchangeStrategies(ExchangeStrategies
                    .builder()
                    .codecs(codecConfigurer -> {
                        codecConfigurer.defaultCodecs().jackson2JsonDecoder(buildJsonDeserializer());
                    })
                    .build())
            .build();
} 

public static Jackson2JsonDecoder buildJsonDeserializer() {
    ObjectMapper customObjectMapper = new ObjectMapper();
    SimpleModule simpleModule = new SimpleModule();
    simpleModule.addDeserializer(Map.class, new JsonDeserializer<Map<String, String>>() {
        @Override
        public Map<String, String> deserialize(JsonParser p, DeserializationContext ctxt)
                throws IOException {
            ...
        }
    });
    customObjectMapper.registerModule(simpleModule);
    return new Jackson2JsonDecoder(customObjectMapper, MediaType.APPLICATION_JSON);
}

新版本有bug还是只是改了不知道怎么设置？

Answer 1

试试这个：

WebClient.builder()
        .defaultHeader(ACCEPT, APPLICATION_JSON_VALUE)
        .defaultHeader(HttpHeaders.ACCEPT_ENCODING, "identity")
        .codecs(configurer -> {
          configurer.customCodecs().registerWithDefaultConfig(buildJsonDeserializer());
        })
        .build();

这是官方文档的link。