个人中心
文章发布
退出
作者热门文章
- html - 出于某种原因，IE8 对我的 Sass 文件中继承的 html5 CSS 不友好？
- JMeter 在响应断言中使用 span 标签的问题
- html - 在 :hover and :active? 上具有不同效果的 CSS 动画
- html - 相对于居中的 html 内容固定的 CSS 重复背景？
26
4
我的 JPA 存储库:
@RepositoryRestResource(path = "developers")
public interface DeveloperRepository extends CrudRepository<Developer, Long> {
@Override
Iterable<Developer> findAll();
}
我的小服务程序:
<servlet>
<servlet-name>rest-exporter</servlet-name>
<servlet-class>org.springframework.data.rest.webmvc.RepositoryRestDispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>rest-exporter</servlet-name>
<url-pattern>/api/v1/*</url-pattern>
</servlet-mapping>
我发送这个请求:
curl -X POST -v --data-binary '{"name" : "John Doe"}' -H "Content-Type: application/json" http://localhost:8080/crm/api/v1/developers
并提出这个异常:
2014-05-01 18:03:34,850 [http-bio-8080-exec-2] WARN org.springframework.http.converter.json.MappingJackson2HttpMessageConverter - Failed to evaluate deserialization for type [simple type, class cz.adinternet.crm.project.domain.Project]
java.lang.NullPointerException
at org.springframework.data.rest.core.mapping.ResourceMappings.getMappingFor(ResourceMappings.java:225)
at org.springframework.data.rest.core.mapping.RepositoryAwareResourceInformation.getMappingFor(RepositoryAwareResourceInformation.java:97)
at org.springframework.data.rest.webmvc.json.PersistentEntityJackson2Module$AssociationUriResolvingDeserializerModifier.updateBuilder(PersistentEntityJackson2Module.java:325)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.buildBeanDeserializer(BeanDeserializerFactory.java:281)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.createBeanDeserializer(BeanDeserializerFactory.java:168)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer2(DeserializerCache.java:401)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer(DeserializerCache.java:350)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:263)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:243)
at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:144)
at com.fasterxml.jackson.databind.DeserializationContext.findContextualValueDeserializer(DeserializationContext.java:366)
at com.fasterxml.jackson.databind.deser.std.StdDeserializer.findDeserializer(StdDeserializer.java:688)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.resolve(BeanDeserializerBase.java:438)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:294)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:243)
at com.fasterxml.jackson.databind.deser.DeserializerCache.hasValueDeserializerFor(DeserializerCache.java:193)
at com.fasterxml.jackson.databind.DeserializationContext.hasValueDeserializerFor(DeserializationContext.java:344)
at com.fasterxml.jackson.databind.ObjectMapper.canDeserialize(ObjectMapper.java:2035)
at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.canRead(MappingJackson2HttpMessageConverter.java:163)
at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.canRead(MappingJackson2HttpMessageConverter.java:153)
at org.springframework.data.rest.webmvc.PersistentEntityResourceHandlerMethodArgumentResolver.resolveArgument(PersistentEntityResourceHandlerMethodArgumentResolver.java:94)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:79)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:157)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:124)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:690)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
2014-05-01 18:03:34,864 [http-bio-8080-exec-2] WARN org.springframework.http.converter.json.MappingJackson2HttpMessageConverter - Failed to evaluate deserialization for type [simple type, class cz.adinternet.crm.project.domain.Project]
java.lang.NullPointerException
at org.springframework.data.rest.core.mapping.ResourceMappings.getMappingFor(ResourceMappings.java:225)
at org.springframework.data.rest.core.mapping.RepositoryAwareResourceInformation.getMappingFor(RepositoryAwareResourceInformation.java:97)
at org.springframework.data.rest.webmvc.json.PersistentEntityJackson2Module$AssociationUriResolvingDeserializerModifier.updateBuilder(PersistentEntityJackson2Module.java:325)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.buildBeanDeserializer(BeanDeserializerFactory.java:281)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.createBeanDeserializer(BeanDeserializerFactory.java:168)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer2(DeserializerCache.java:401)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer(DeserializerCache.java:350)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:263)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:243)
at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:144)
at com.fasterxml.jackson.databind.DeserializationContext.findContextualValueDeserializer(DeserializationContext.java:366)
at com.fasterxml.jackson.databind.deser.std.StdDeserializer.findDeserializer(StdDeserializer.java:688)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.resolve(BeanDeserializerBase.java:438)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:294)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:243)
at com.fasterxml.jackson.databind.deser.DeserializerCache.hasValueDeserializerFor(DeserializerCache.java:193)
at com.fasterxml.jackson.databind.DeserializationContext.hasValueDeserializerFor(DeserializationContext.java:344)
at com.fasterxml.jackson.databind.ObjectMapper.canDeserialize(ObjectMapper.java:2035)
at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.canRead(MappingJackson2HttpMessageConverter.java:163)
at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.canRead(MappingJackson2HttpMessageConverter.java:153)
at org.springframework.data.rest.webmvc.PersistentEntityResourceHandlerMethodArgumentResolver.resolveArgument(PersistentEntityResourceHandlerMethodArgumentResolver.java:94)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:79)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:157)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:124)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:690)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
2014-05-01 18:03:34,866 [http-bio-8080-exec-2] ERROR org.springframework.data.rest.webmvc.AbstractRepositoryRestController - No suitable HttpMessageConverter found to read request body into object of type class cz.adinternet.crm.project.domain.Project from request with content type of application/json!
org.springframework.http.converter.HttpMessageNotReadableException: No suitable HttpMessageConverter found to read request body into object of type class cz.adinternet.crm.project.domain.Project from request with content type of application/json!
at org.springframework.data.rest.webmvc.PersistentEntityResourceHandlerMethodArgumentResolver.resolveArgument(PersistentEntityResourceHandlerMethodArgumentResolver.java:107)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:79)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:157)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:124)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:690)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
我尝试将各种版本的 jackson 添加到类路径中，但出现相同的错误。
Spring 版本:4.0.4.RELEASESpring Data JPA:1.5.1.RELEASESpring Data Rest:2.0.1.RELEASE
最佳答案
我有一个类似的问题 - 通过调试失败的代码并获得关于失败的完美提示轻松解决了这个问题。在我的例子中，这是一个错误的属性名称(小写/大写不匹配)。
如果您使用的是 eclipse - 只需添加 java 异常断点(“运行”菜单)并选择 NullPointerException。当停止调试时，回头查看堆栈跟踪，直到发现有问题的属性。
祝你好运!
关于spring-data-rest - Spring Data Rest POST 在 MappingJackson2HttpMessageConverter 引发 NullPointerException - 无法评估类型的反序列化，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23413913/
26
4
0
我已经制作了一个用于报名参加 Activity 的小应用程序。用户输入他们的数据，然后单击“登录我”。 现在有时人们在数据库中是双倍的，完全相同的数据彼此之间很快被插入了两次。这只能表示某人单击了两次
这个问题在这里已经有了答案: 关闭 10 年前。 Possible Duplicate: PHP: “Notice: Undefined variable” and “Notice: Undefin
这个问题在这里已经有了答案: 关闭 10 年前。 Possible Duplicate: PHP: “Notice: Undefined variable” and “Notice: Undefin
我正在尝试将数据从 Textarea 发布到经典的 ASP 脚本，该脚本更新本地计算机上的 MS SQL，然后发布到另一台服务器上的 PHP 脚本。但是，执行以下操作不起作用，因为它会切断文本区域的数
无效的代码: login_form = page.form_with(:method => 'post') 和有效的代码: login_form = page.form_with(:method =>
我希望能够在 HTTP Post 请求被触发时拦截它，然后修改其请求正文(或参数)，然后发送它。 这怎么可能用 jquery/js 实现。 谢谢 最佳答案 Jquery ajax beforeSend
我想编写一个 Mysql 语句，从表(发布)中选择所有内容，其中标题类似于 $title 除了 $title 的标题。基本上我想显示某个帖子的所有相关帖子。我希望查询选择表中标题或详细信息中具有标题名
我已经成功创建了一个简单的 HTML 表单，它将上传的文件发布到我的 Amazon S3 存储桶。我遵循了以下说明: http://aws.amazon.com/articles/1434 现在我正在
我正在实现一个 PayPal IPN 页面，并想检查以确保请求真正来自 PayPal 而不是被欺骗。我假设 HTTP_REFERRER 不是一个好的检查方式？我已经尝试过这种方法，但变量只是空的。 有
我有一个非常简单的设置有一个非常特殊的问题。 该设置部署了 nginx Web 服务器以提供一些静态页面。它还有一个用于处理 POST 请求的后端 uwsgi 守护进程。 我的nginx位置配置如下
我认为我做错了什么，或者误解了我在网上阅读的有关 POST 和 GET 请求的内容。我在 myNumber.ejs 上有一个提交表单。当我按下提交时，有 Add.ejs 的 View 。 Add.ej
我需要将数据从 Express 应用程序的前端发送到后端，然后使用需要显示该数据的 EJS 呈现页面。 问题是 app.post() 方法，随后 res.render() 函数似乎没有完全执行或者当我
根据AWS Documentation对于 CloudFormation cfn-hup 帮助程序脚本，cfn-hup Hook 可以具有“要检测的以逗号分隔的条件列表”。这些条件/触发器可以是 po
位于“wp-admin/includes/”的“post.php”文件中的 wordpress 函数“get_default_post_to_edit”无法正常工作。 当我加载页面时:wp-admin
我使用请求库发布数据，但在服务器上收到空主体，没有传递任何数据。我在代码中遗漏了什么吗？ Map map = new Map(); map[csrfNameKey] = csrfName;
我正在尝试使用 siege 3.0.1 测试我的网站。但是好像siege不发送POST数据。这是我从网络浏览器收到的请求 POST / HTTP/1.0 Accept: text/html,appli
我正在尝试为 stockfigher 游戏 api 编写包装器，只是为了了解 feign 是如何工作的，而且我在第一个 POST 方法中遇到了问题: @RequestMapping(method =
如何使用 Jersey 获取原始 POST？ @FormParam将不起作用，因为我发布的原始 JSON 不在任何特定的 POST 字段中。 最佳答案 Jersey 带有一个用于将 JSON 映射到
我正在尝试同时创建一个实体和两个子实体的实例。 如果我将以下 JSON 发布到/user_objects 资源，它会很高兴地创建父 user_object 实体和链接的 User_object_att
在 IPV6 中如何使用 IPV6 地址和端口号构建 CURL POST http 请求。任何类型的线程都将受到赞赏。 尝试构建如下请求 >curl --interface 'http://[2001
我是一名优秀的程序员,十分优秀！