JsonIgnoreProperties 不适用于 spring boot

Question

目前，Spring Boot示例应用创建正常。在请求中，如果有任何未知字段到来，那么我们需要抛出错误。

为此，@JsonIgnoreProperties(ignoreUnknown = false)正在使用注释。但是，当我访问该 URL 时，它不起作用。

请查找代码片段如下：

    @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);   
        }

请按如下方式查找示例 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 个选择：

1. 放置@JsonIgnoreProperties一个您反序列化的类，而不是在 Spring 控制器中。

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

2. 配置您的ObjectMapper实例：

   mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true);

3. 自定义 Spring Boot 的 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Spring Boot 参考的 76.3 节。