JsonIgnoreProperties 不适用于 Spring Boot

Question

目前，Spring Boot示例应用已经正常创建。在请求中，如果有任何未知字段到来，那么我们需要抛出一个错误。

为此使用了@JsonIgnoreProperties(ignoreUnknown = false) 注释。但是，当我访问 URL 时，它不起作用。

请找到代码sn-p如下：

    @RestController @RequestMapping(value = "/")
    @JsonIgnoreProperties(ignoreUnknown = false) public class
    UserController {
        private final Logger LOG = LoggerFactory.getLogger(getClass());

        private final UserRepository userRepository;

        private final UserDAL userDAL;

        public UserController(UserRepository userRepository, UserDAL userDAL){
            this.userRepository = userRepository;       
            this.userDAL = userDAL;     
        }

        @RequestMapping(
            value = "/create", method = RequestMethod.POST,
            consumes = MediaType.APPLICATION_JSON_VALUE, 
            produces = MediaType.APPLICATION_JSON_VALUE
        )   
        public User addNewUsers(@RequestBody @Valid User user) 
            throws JsonProcessingException {        


            LOG.info("Saving user.");

            CardInfo cardInfo = new CardInfo();
            cardInfo.setCardId("12345678901");      
            user.setCardInfo(cardInfo);
            ObjectMapper mapper = new ObjectMapper();

            String jsonString = mapper.writeValueAsString(cardInfo);
            user.setCardInfo1(jsonString);  
            userDAL.getAllUsers();      

            return userRepository.save(user);   
        }

请按以下方式查找示例 Pom： http://maven.apache.org/xsd/maven-4.0.0.xsd"> 4.0.0

<groupId>com.journaldev.spring</groupId>
<artifactId>spring-boot-mongodb</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>spring-boot-mongodb</name>
<description>Spring Boot MongoDB Example</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.9.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

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

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

Answer 1

您至少有 3 个选项：

1. 将 @JsonIgnoreProperties 放在您反序列化的类上，而不是放在 Spring 控制器中。

   • 但是，我看到您要反序列化的类是 com.journaldev.bootifulmongodb.model.User，所以很可能您无法修改它。

2. 配置您的ObjectMapper 实例：

   mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true);

1. Customize Spring Boot's Jackson Object Mapper - 通过设置正确的环境属性：

   spring.jackson.deserialization.fail-on-unknown-properties=true

更多信息，请参考section 76.3 of Spring Boot's reference。