如何在不继承spring-boot-starter-web的情况下在Spring Boot中获取ObjectMapper实例？

Question

I'm playing around with Spring Boot 2.0.0M2, trying to create a CLI application, not a web one. My problem is that even including

  compile 'org.springframework.boot:spring-boot-starter'
  compile 'org.springframework.boot:spring-boot-starter-json'

in my build, ObjectMapper is not created by Boot because

Bean method 'jacksonObjectMapper' not loaded because @ConditionalOnClass did not find required class 'org.springframework.http.converter.json.Jackson2ObjectMapperBuilder'

What's the best practice when you want to have Spring Boot instance and configure Jackson but don't want to start a web server?

Answer 1

Why don't you just initialize it yourself.

@Bean
ObjectMapper objectMapper() {
    return new ObjectMapper();
}

Answer 2

如果要避免包含完整的Web堆栈（从Spring Boot v.2.0.0M4开始），可以添加spring-boot-starter-json 。

Answer 3

您可以尝试并添加org.springframework:spring-web依赖，因为该类位于其中。