重庆分公司,新征程启航
为企业提供网站建设、域名注册、服务器等服务
本篇内容主要讲解“openfeign get请求参数dto出现错误怎么解决”,感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷,实用性强。下面就让小编来带大家学习“openfeign get请求参数dto出现错误怎么解决”吧!
按需搭建网站可以根据自己的需求进行定制,成都网站设计、成都网站制作构思过程中功能建设理应排到主要部位公司成都网站设计、成都网站制作的运用实际效果公司网站制作网站建立与制做的实际意义
项目中使用的是spring boot 2.3.3,spring-cloud Hoxton.SR8.
在使用feign调用服务时 使用@GetMapping 和 @SpringQueryMap 和传输DTO对象,其中DTO对象中包含LocalDateTime属性,一直报类型转换异常,无法调用服务。解决方法有很多,找了网上很多解决办法都没效果,大体都是FastJson 序列化之类的(可能每个项目差异吧), 解决过程分析暂不分析吧。先行记录一下,因为看到网上很多人貌似都遇到过这个问题。以下是服务提供方
@FeignClient(value = "user-service", path = "/user/v1") public interface UserClient { @GetMapping("/") PageVOgetUserList(@SpringQueryMap UserDTO userDTO); }
@Data @ApiModel(value = "运营平台用户列表查询参数") public class UserDTO implements Serializable { private static final long serialVersionUID = -3767202379100110105L; @ApiModelProperty(value = "用户id") private Long id; @Size(max = 12, message = "nickName:用户昵称最大长度为12") @ApiModelProperty(value = "用户昵称") private String nickName; @ApiModelProperty(value = "手机号码") private String phone; @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") @ApiModelProperty(value = "创建时间开始") private LocalDateTime createdAtStart; @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") @ApiModelProperty(value = "创建时间结束") private LocalDateTime createdAtEnd; @ApiModelProperty(value = "页码", required = true) private Integer page; @ApiModelProperty(value = "每页条数", required = true) private Integer size; }
核心重点:新增一个QueryMapEncoder
import feign.Param; import feign.QueryMapEncoder; import feign.codec.EncodeException; import java.beans.IntrospectionException; import java.beans.Introspector; import java.beans.PropertyDescriptor; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.time.LocalDateTime; import java.time.format.DateTimeFormatter; import java.util.*; public class LocalDateTimeQueryMapEncoder implements QueryMapEncoder { private final Map, ObjectParamMetadata> classToMetadata = new HashMap , ObjectParamMetadata>(); private final DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"); @Override public Map encode(Object object) throws EncodeException { try { ObjectParamMetadata metadata = getMetadata(object.getClass()); Map propertyNameToValue = new HashMap (); for (PropertyDescriptor pd : metadata.objectProperties) { Method method = pd.getReadMethod(); Object value = method.invoke(object); if (value != null && value != object) { Param alias = method.getAnnotation(Param.class); String name = alias != null ? alias.value() : pd.getName(); if("java.time.LocalDateTime".equals(method.getReturnType().getName())){ //propertyNameToValue.put(name, "2020-10-07 01:01:00"); propertyNameToValue.put(name, dtf.format((LocalDateTime)value)); }else{ propertyNameToValue.put(name, value); } } } return propertyNameToValue; } catch (IllegalAccessException | IntrospectionException | InvocationTargetException e) { throw new EncodeException("Failure encoding object into query map", e); } } private ObjectParamMetadata getMetadata(Class> objectType) throws IntrospectionException { ObjectParamMetadata metadata = classToMetadata.get(objectType); if (metadata == null) { metadata = ObjectParamMetadata.parseObjectType(objectType); classToMetadata.put(objectType, metadata); } return metadata; } private static class ObjectParamMetadata { private final List objectProperties; private ObjectParamMetadata(List objectProperties) { this.objectProperties = Collections.unmodifiableList(objectProperties); } private static ObjectParamMetadata parseObjectType(Class> type) throws IntrospectionException { List properties = new ArrayList (); for (PropertyDescriptor pd : Introspector.getBeanInfo(type).getPropertyDescriptors()) { boolean isGetterMethod = pd.getReadMethod() != null && !"class".equals(pd.getName()); if (isGetterMethod) { properties.add(pd); } } return new ObjectParamMetadata(properties); } } }
@Configuration public class CustomFeignConfig { @Bean public Feign.Builder feignBuilder() { return Feign.builder() .queryMapEncoder(new LocalDateTimeQueryMapEncoder()) .retryer(Retryer.NEVER_RETRY); } }
到此,相信大家对“openfeign get请求参数dto出现错误怎么解决”有了更深的了解,不妨来实际操作一番吧!这里是创新互联网站,更多相关内容可以进入相关频道进行查询,关注我们,继续学习!