一尘不染

Spring @RestController自定义JSON反序列化器

spring-boot

我想对某些类使用自定义JSON反序列化器(在此处 作用 ),但无法正常工作。自定义解串器只是不被调用。

我使用Spring Boot 1.2。

解串器:

public class ModelDeserializer extends JsonDeserializer<Role> {

    @Override
    public Role deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
        return null; // this is what should be called but it isn't
    }
}

控制器:

@RestController
public class RoleController {

    @RequestMapping(value = "/role", method = RequestMethod.POST)
    public Object createRole(Role role) {
        // ... this is called
    }
}
  1. @JsonDeserialize 在角色上

    @JsonDeserialize(using = ModelDeserializer.class)
    

    public class Role extends Model {

    }

  2. Jackson2ObjectMapperBuilder Java Config中的bean

    @Bean
    

    public Jackson2ObjectMapperBuilder jacksonBuilder() {
    Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
    builder.deserializerByType(Role.class, new ModelDeserializer());
    return builder;
    }

我究竟做错了什么?

编辑 可能是@RestController由于它与@Controller


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2020-05-30

共1个答案

一尘不染

首先,您不需要重写Jackson2ObjectMapperBuilder即可添加自定义反序列化器。当您无法添加@JsonDeserialize注释时,应使用此方法。您应该使用@JsonDeserialize或覆盖Jackson2ObjectMapperBuilder

缺少的是@RequestBody注释:

@RestController
public class JacksonCustomDesRestEndpoint {

    @RequestMapping(value = "/role", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public Object createRole(@RequestBody Role role) {
        return role;
    }
}

@JsonDeserialize(using = RoleDeserializer.class)
public class Role {
    // ......
}

public class RoleDeserializer extends JsonDeserializer<Role> {
    @Override
    public Role deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
        // .................
        return something;
    }
}
2020-05-30