Maven Spring数据REST与自定义GSON实例

我试图在我的整个项目中使用GSON进行JSON（反）序列化。对数据库的访问由Spring数据REST服务处理。 Spring Boot版本为

1.5.3.发布版

。 我需要使用一个自定义的GSON实例，但Jackson似乎阻碍了这条路

my

pom.xml

中声明的依赖项如下：

<dependencies>
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.8.0</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-rest</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-rest-hal-browser</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-hateoas</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>    
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.5</version>
    </dependency>
    <dependency>
        <groupId>joda-time</groupId>
        <artifactId>joda-time</artifactId>
        <version>2.9.9</version>
    </dependency>
</dependencies> 

我还设置了

spring.http.converters.preferredJSON mapper=gson

。 此设置可以很好地处理服务器上的请求和响应

@RestController

（使用请求映射进行测试，该映射将ping回它接收到的完全相同的对象。）。但是，我的存储库的REST接口（

@RepositoryRestResource

来自

spring boot starter data REST

）仍在使用Jackson（发送与以前相同的实体POST请求）：

---

参考，它可能会帮助您谢谢您，但这正是我采用不同方法的地方。我重新表述了这个问题，因为GSON与

@RestController

配合良好，但与

@RepositoryRestResource

配合良好。根据我们只能定制Jackson，但没有提及GSON。希望有人能回答：如果我们能用Gson而不是Jackson的Spring数据REST

@Bean
public Gson gson() {
    return new GsonBuilder()
            .registerTypeAdapter(DateTime.class, new JodaDateTimeAdapter())
            .create();
}

org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON document: Can not construct instance of org.joda.time.DateTime: no String-argument constructor/factory method to deserialize from String value ('2017-05-29T20:31:57.898+02:00')
at [Source: org.apache.catalina.connector.CoyoteInputStream@36d7b26; line: 10, column: 19] (through reference chain: cc.backend.model.database.DeviceDB["device"]->cc.model.Device["lastUpdate"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of org.joda.time.DateTime: no String-argument constructor/factory method to deserialize from String value ('2017-05-29T20:31:57.898+02:00')
at [Source: org.apache.catalina.connector.CoyoteInputStream@36d7b26; line: 10, column: 19] (through reference chain: cc.backend.model.database.DeviceDB["device"]->cc.model.Device["lastUpdate"])
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:234) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readInternal(AbstractJackson2HttpMessageConverter.java:211) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:193) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.data.rest.webmvc.config.PersistentEntityResourceHandlerMethodArgumentResolver.read(PersistentEntityResourceHandlerMethodArgumentResolver.java:236) ~[spring-data-rest-webmvc-2.6.3.RELEASE.jar:na]
at org.springframework.data.rest.webmvc.config.PersistentEntityResourceHandlerMethodArgumentResolver.read(PersistentEntityResourceHandlerMethodArgumentResolver.java:193) ~[spring-data-rest-webmvc-2.6.3.RELEASE.jar:na]
at org.springframework.data.rest.webmvc.config.PersistentEntityResourceHandlerMethodArgumentResolver.resolveArgument(PersistentEntityResourceHandlerMethodArgumentResolver.java:141) ~[spring-data-rest-webmvc-2.6.3.RELEASE.jar:na]
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:158) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) ~[spring-webmvc-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) ~[spring-webmvc-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) ~[spring-webmvc-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) [spring-webmvc-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) [tomcat-embed-core-8.5.14.jar:8.5.14]