我正在使用 spring data mongodb,在执行延迟加载 true 后,我收到错误“找不到类 org.springframework.data.mongodb.core.convert.DefaultDbRefResolver$LazyLoadingInterceptor 的序列化程序”
。
我的域类是
public class Preference extends BaseEntity {
@DBRef(lazy = true)
User user;
MetadataEnum preferenceType;
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public MetadataEnum getPreferenceType() {
return preferenceType;
}
public void setPreferenceType(MetadataEnum preferenceType) {
this.preferenceType = preferenceType;
}
public List<Subtype> getSubtypes() {
return subtypes;
}
public void setSubtypes(List<Subtype> subtypes) {
this.subtypes = subtypes;
}
List<Subtype> subtypes = new ArrayList<Subtype>();
boolean enableSearch;
}
我已经浪费了很多时间,但我无法得到合适的答案?任何人都可以帮助我重新喜欢它吗? 提前致谢
最佳答案
根据您的要求添加此配置代码
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.core.convert.LazyLoadingProxy;
import com.fasterxml.jackson.core.Version;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
@Configuration
public class LazyLoadingSerializationConfig {
@Bean
public ObjectMapper objectMapper() {
ObjectMapper om = new ObjectMapper();
final SimpleModule module = new SimpleModule("<your entity>", new Version(1, 0, 0,null));
module.addSerializer(LazyLoadingProxy.class, new LazyLoadingSerializer());
om.registerModule(module);
return om;
}
}
和
import java.io.IOException;
import org.springframework.data.mongodb.core.convert.LazyLoadingProxy;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
public class LazyLoadingSerializer extends JsonSerializer<LazyLoadingProxy> {
@Override
public void serialize(LazyLoadingProxy value, JsonGenerator jgen,
SerializerProvider provider) throws IOException,
JsonProcessingException {
jgen.writeStartObject();
jgen.writeStringField("id", value.toDBRef().getId().toString());
jgen.writeEndObject();
}
}
希望这对您有帮助!
关于mongodb - 出现错误 "No serializer found for class org.springframework.data.mongodb.core.convert.DefaultDbRefResolver$LazyLoadingInterceptor",我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31914090/