使用Jersey客户端时,Java 8 Date API(Jsr310)存在问题
我正在使用jersey客户端执行一个小PoC来使用REST服务,并且我遇到了LocalDateTime格式的字段问题。 REST服务响应如下所示:使用Jersey客户端时,Java 8 Date API(Jsr310)存在问题,java,rest,jersey,jackson,jsr310,Java,Rest,Jersey,Jackson,Jsr310,我正在使用jersey客户端执行一个小PoC来使用REST服务,并且我遇到了LocalDateTime格式的字段问题。 REST服务响应如下所示: { "id": 12, "infoText": "Info 1234", "creationDateTime": "2001-12-12T13:40:30" } ... Caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not instan
{
"id": 12,
"infoText": "Info 1234",
"creationDateTime": "2001-12-12T13:40:30"
}
...
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not instantiate value of type [simple type, class java.time.LocalDateTime] from String value ('2001-12-12T13:40:30'); no single-String constructor/factory method
at [Source: org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream@21b2e768; line: 1, column: 32] (through reference chain: com.my.poc.jerseyclient.Info["creationDateTime"])
...
和我的实体类:
package com.my.poc.jerseyclient;
import java.time.LocalDateTime;
public class Info {
private Long id;
private String infoText;
private LocalDateTime creationDateTime;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getInfoText() {
return infoText;
}
public void setInfoText(String infoText) {
this.infoText = infoText;
}
public LocalDateTime getCreationDateTime() {
return creationDateTime;
}
public void setCreationDateTime(LocalDateTime creationDateTime) {
this.creationDateTime = creationDateTime;
}
}
my pom.xml中的依赖项:
<dependencies>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-client</artifactId>
<version>2.21</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.jaxrs</groupId>
<artifactId>jackson-jaxrs-json-provider</artifactId>
<version>2.6.1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
<version>2.6.1</version>
</dependency>
</dependencies>
我得到了这样一个例外:
{
"id": 12,
"infoText": "Info 1234",
"creationDateTime": "2001-12-12T13:40:30"
}
...
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not instantiate value of type [simple type, class java.time.LocalDateTime] from String value ('2001-12-12T13:40:30'); no single-String constructor/factory method
at [Source: org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream@21b2e768; line: 1, column: 32] (through reference chain: com.my.poc.jerseyclient.Info["creationDateTime"])
...
我错过了什么?我在RestTemplate(SpringRESTClient)上尝试了这一点,它在没有任何配置的情况下工作得非常好。jsr310模块仍然需要向Jackson注册。您可以在as中执行此操作,在as中,您可以使用
ObjectMapper
ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new JSR310Module());
然后向客户端注册ContextResolver
。将会发生的是,JacksonJsonProvider
应该调用getContext
方法,并检索要用于(反)序列化的ObjectMapper
您也可以在服务器端使用相同的ContextResolver
。如果您只在客户端上需要此功能,另一种方法是使用ObjectMapper
简单地构造JacksonJsonProvider
。简单一点
new JacksonJsonProvider(mapper)
将所有功能组合在一起以实现客户端功能:
ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new JSR310Module());
JacksonJsonProvider provider = new JacksonJsonProvider(mapper);
Client client = ClientBuilder.newClient(new ClientConfig().register(provider));
它很管用,谢谢!我想我必须以某种方式向客户注册,但我不知道如何注册。感谢您如此清晰明了地给出答案。请注意,自Jackson 2.6.0以来,
JSR310模块
被弃用,取而代之的是JavaTimeModule
。