Spring web：@RequestBody Json转换为Java8 LocalTime无法正常工作 [英] Spring web: @RequestBody Json conversion for Java8 LocalTime not working

问题描述

在我的Spring REST webapp中，我正在尝试让控制器使用Java8 LocalTime。
我在POST请求中发送此Json

In my Spring REST webapp, I'm trying to get a controller working with Java8 LocalTime. I'm sending this Json in a POST request

{
    "hour": "0",
    "minute": "0",
    "second": "0",
    "nano": "0"
}

我得到一个 HttpMessageNotReadableException ，其中包含以下Jackson错误

and I get a HttpMessageNotReadableException with the following Jackson error

Could not read JSON: No suitable constructor found for type [simple type, class java.time.LocalTime]: can not instantiate from JSON object (need to add/enable type information?) 
at [Source: org.apache.catalina.connector.CoyoteInputStream@58cfa2a0; line: 2, column: 5]; 
nested exception is com.fasterxml.jackson.databind.JsonMappingException: No suitable constructor found for type [simple type, class java.time.LocalTime]: can not instantiate from JSON object (need to add/enable type information?) 
at [Source: org.apache.catalina.connector.CoyoteInputStream@58cfa2a0; line: 2, column: 5]

我正在使用spring-web-4.0.3.RELEASE使用spring-boot-starter-web-1.0.2.RELEASE，jackson-databind-2.4.2和jackson-datatype-jsr310-2.4.2

I'm using spring-web-4.0.3.RELEASE with spring-boot-starter-web-1.0.2.RELEASE, jackson-databind-2.4.2 and jackson-datatype-jsr310-2.4.2

从我的内容知道谷歌搜索，Spring应该自动为Java8.time对象注册JSR-310模块。

From what I understood googling around, Spring should automatically register JSR-310 modules for Java8.time objects.

我找到了问题的答案，但它对我不起作用：< a href =https://stackoverflow.com/questions/26329875/spring-boot-and-jackson-jsr310-in-response-body> Spring Boot和Jackson，JSR310作为回应主体

I found an answer to my problem, but it does not work for me: Spring Boot and Jackson, JSR310 in response body

我没有使用@EnableWebMvc注释的配置，这是我唯一的配置类

I have no configurations annotated with @EnableWebMvc and here is my only configuration class

@EnableAutoConfiguration
@ComponentScan
@EnableAspectJAutoProxy()
@Configuration
@ImportResource(value = "Beans.xml") 
public class Application extends WebMvcConfigurerAdapter {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @Override
    public void addFormatters(FormatterRegistry registry) {
        registry.addConverter(new StringToLocalDateTime());
        registry.addConverter(new LocalDateTimeToString());
        registry.addConverter(new StringToLocalDate());
        registry.addConverter(new LocalDateToString());
        registry.addConverter(new StringToLocalTime());
        registry.addConverter(new LocalTimeToString());
    }
}

你能否说明我的配置有什么问题？

Can you suggest what's wrong in my configuration?

推荐答案

您的配置没有任何问题。

There is nothing wrong with your configuration.

我建议您将Spring Boot更新为1.2.0.RELEASE。它使用Spring 4.1.3软件包，解决了 MappingJackson2HttpMessageConverter 的问题。要获得更多信息，请阅读： https://github.com/spring -projects / spring-boot / issues / 1620＃issuecomment-58016018 。它适用于我的情况。

I suggest you to update Spring Boot to 1.2.0.RELEASE. It uses Spring 4.1.3 packages, which have resolved issue with MappingJackson2HttpMessageConverter. To get more info read: https://github.com/spring-projects/spring-boot/issues/1620#issuecomment-58016018 . It worked in my case.

如果您不想更新Spring Boot版本，可能至少可以注释 LocalTime 的字段显式如下：

If you do not want to update Spring Boot version, probably the least you can do is to annotate LocalTime's fields explicitly like that:

@JsonSerialize(using = DateTimeSerializer.class)
@JsonDeserialize(using = DateTimeDeserializer.class)
private LocalTime date;

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