使用Jersey从一个JSON创建多个JPA持久化实体？

时间：2014-02-28 21:51:50

标签： java json rest jpa jersey

也许有人可以指出我正确的方向，我潜伏着解决方案太久了..

我正在使用jersey从POST数据中将json发送到REST服务，并创建一个要插入到我的数据库中的持久实体。有这样的事情：

    @POST
@Path("/create")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON) 
public Response createRecord(Element element) throws Exception{

    violations = validator.validate(element);

    if (violations.size() > 0) {

        jsonResponse.setSuccess(false);
        jsonResponse.setMessage("TODO error message");
        jsonResponse.setValidationError(this.getValidationErrorList());    

    } 
    else {
        try {  
            em.persist(element);  
            em.flush();
            } 
        catch (PersistenceException e) {  
            System.out.println(e.getMessage());
            jsonResponse.setSuccess(false);
            jsonResponse.setMessage("TODO error");
            }  

    }

            jsonResponse.setSuccess(true);
            jsonResponse.setMessage("Success!");

    return Response.ok().entity(new ObjectMapper().writeValueAsString(jsonResponse)).build();

}

但是我想从一个json构造多个实体，如下所示：

[
{
    "usrcre": 0,
    "usrmod": 0,
    "datmod": null,
    "vaecleint": 40,
    "vaeelecle": "1fdsfds",
    "vaevalcle": "fdsf",
    "vaedsc": "dsfdsf"
},
{
    "usrcre": 0,
    "usrmod": 0,
    "datmod": null,
    "vaecleint": 41,
    "vaeelecle": "1TEST",
    "vaevalcle": "0003",
    "vaedsc": "fdgfdgfdg"
},
{
    "usrcre": 0,
    "usrmod": 0,
    "datmod": null,
    "vaecleint": 42,
    "vaeelecle": "1TEST",
    "vaevalcle": "0004",
    "vaedsc": "Valeur 0004gfdgfdg"
},
{
    "usrcre": 0,
    "usrmod": 0,
    "datmod": null,
    "vaecleint": 43,
    "vaeelecle": "1TEST",
    "vaevalcle": "0005",
    "vaedsc": "Valeur 0005fdgfdgd"
}

我尝试使用类似的东西：

public Response createRecord(List<Element> elements) throws Exception

然后尝试迭代这个列表并保留每个元素，但我得到了一个：

java.lang.IllegalArgumentException: argument type mismatch

只要我的方法签名包含列表或数组。我错过了什么吗？

更新：

这是我尝试访问List时的堆栈跟踪（我使用“for each”来尝试并保留所述列表中的每个元素，但无论我如何发送我的内容，它似乎总是有一个空元素JSON）

Warning:   StandardWrapperValve[Jersey Web Application]: Servlet.service() for 

servlet Jersey Web Application threw exception
java.lang.IllegalArgumentException: argument type mismatch
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:125)
    at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:152)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:91)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:346)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:341)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:101)
    at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:224)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
    at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:198)
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:946)
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:323)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:372)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:335)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:218)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
    at java.lang.Thread.run(Thread.java:744)

编辑：或者，如果有人有一个好的解决方法想法，不涉及解析收到的JSON来创建一个集合“元素”我会听到！

1 个答案:

答案 0 :(得分：0)

好的问题解决了！所以这是“解决方案”：

函数“createRecord”位于REST服务中，它从post（@POST）获取数据。我有一个glassfish服务器设置并在本地进行所有测试。事实证明，由于我没有重新启动 glassfish服务器，它仍然需要考虑来自旧资源的旧注释（我的Element类中有一个@XmlRootElement）

因此，jersey与我的JSON for Xml数据不匹配。因此IllegalArgumentException。我重新启动了服务器，解析元素列表的“for each”工作完美无缺！

旧：“你试过重启吗？”实际上再次工作。

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