springboot在输出时将null转为空字符串

最新推荐文章于 2024-01-19 16:22:13 发布

桃林春风一杯酒

最新推荐文章于 2024-01-19 16:22:13 发布

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本文链接：https://blog.youkuaiyun.com/m0_64998696/article/details/135484726

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@Configuration
public class JacksonConfig {
    @Bean
    @Primary
    @ConditionalOnMissingBean (ObjectMapper.class)
    public ObjectMapper jacksonObjectMapper( Jackson2ObjectMapperBuilder builder) {
        ObjectMapper objectMapper = builder.createXmlMapper(false).build();
        objectMapper.getSerializerProvider().setNullValueSerializer(new JsonSerializer<Object>() {
            @Override
            public void serialize( Object o, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws
                                                                                                                 IOException {
                jsonGenerator.writeString("");
            }
        });
        return objectMapper;
    }

}

需要这么一个配置类