Question

我最近在项目中添加了Spring-data，然后发现在我的REST控制器中，客户端提供的模型不再从JSON自动序列化。我该如何解决？

我添加了：

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb</artifactId>
    </dependency>

现在User参数没有调用它的String arg构造函数，而u为空！

@PostMapping()
@ResponseBody
public User createUser(HttpServletRequest request, @RequestParam("user") User u) {

    log.info("Got user! " + u);

    users.save(u);
    Optional<User> found = users.findById(u.getEmail());
    log.info("Saved user!! ");

    return found.get();
}

Answer 1

如果使用spring数据构建.war ，运行java -jar <path-to-war> --debug，然后在不使用spring数据的情况下构建/运行它，并比较输出，您可以看到以下bean添加spring-data时会包含在内。

SpringDataWebAutoConfiguration matched: - @ConditionalOnClass found required classes 'org.springframework.data.web.PageableHandlerMethodArgumentResolver', 'org.springframework.web.servlet.config.annotation.WebMvcConfigurer' (OnClassCondition) - found ConfigurableWebEnvironment (OnWebApplicationCondition) - @ConditionalOnMissingBean (types: org.springframework.data.web.PageableHandlerMethodArgumentResolver; SearchStrategy: all) did not find any beans (OnBeanCondition) SpringDataWebAutoConfiguration#pageableCustomizer matched: - @ConditionalOnMissingBean (types: org.springframework.data.web.config.PageableHandlerMethodArgumentResolverCustomizer; SearchStrategy: all) did not find any beans (OnBeanCondition) SpringDataWebAutoConfiguration#sortCustomizer matched: - @ConditionalOnMissingBean (types: org.springframework.data.web.config.SortHandlerMethodArgumentResolverCustomizer; SearchStrategy: all) did not find any beans (OnBeanCondition)

这是因为Spring数据公开了链接到您的数据存储库的REST控制器，如此处所述：http://spring.io/projects/spring-data-rest，这破坏了序列化传递给REST控制器的对象的默认自动配置。

只需排除自动配置，您现有的自动序列化将起作用：

@SpringBootApplication(exclude = { SpringDataWebAutoConfiguration.class }) public class MyApplication{ public static void main(String[] args) { SpringApplication.run(MyApplication.class, args); } }

在Spring Boot应用程序中包含Spring Data会中断自动序列化

1 个答案: