Question

我正在尝试执行POST请求/获取我想要发送一些值，在阅读后我发现@FormParam是我应该使用但我不能让它工作。我试着这样做我的Fetch

  createOyster(){
  var resource = "version=" + this.state.version + "&customer=" + this.state.customer + "&userId=" + this.state.userId + "&oysterName=" + this.state.oysterName + "&backupFile=" + this.state.backupFile;
  console.log(resource)
  fetch('http://localhost:8080/sleepy-oyster/v2/oyster/', {
    method: 'POST',
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/x-www-form-urlencoded',
    },
    body: JSON.stringify({
      resource
    })
  })
}

console.log（资源）给出了

version=[object Object]&customer=NCC&userId=johjon&oysterName=NCC_johjon2&backupFile=Kund_NCC_Prod_2018-03-22.228680192.bak

当我尝试向我的REST请求时，看起来像这样

 @POST
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
public Response createOyster(@FormParam("version") String version, @FormParam("customer") String customer,
                             @FormParam("userId") String userId, @FormParam("oysterName") String oysterName,
                             @FormParam("backupFile") String backupFile) throws IOException {
    System.out.println(version + "HEJ HEJ HEJ HEJ HEJ HEJ HEJ");
    ObjectMapper mapper = new ObjectMapper();
    mapper.configure(DeserializationFeature.UNWRAP_ROOT_VALUE, true);
    NexusResource resource = mapper.readValue(version, NexusResource.class);
    System.out.println(resource);

     dbWorker.restoreDatabase(userId, backupFile);
     oysterWorker.createOyster(userId, oysterName);
     oysterWorker.installOyster(oysterName);
     String selectedVersion = versionWorker.getVersionFromNexus(resource,oysterName,customer);

     return Response.ok(selectedVersion).build();
}

我得到一个NullPointerException，它没有指向任何让我困惑的代码

javax.servlet.ServletException: java.lang.NullPointerException
at org.glassfish.jersey.servlet.WebComponent.serviceImpl (WebComponent.java:489)
at org.glassfish.jersey.servlet.WebComponent.service (WebComponent.java:427)
at org.glassfish.jersey.servlet.ServletContainer.service (ServletContainer.java:388)

自从我第一次使用@FormParam以来，我可能搞砸了一些东西。任何人都可以看到为什么它给出null。我的REST中的Sout也提供了null，因此REST无法获得它。我想这是因为版本是[object Object]，因为其余的不给出null。我该怎么处理？

如果我只是console.log（this.state.version），我会得到我的完整对象

{resourceURI: "http://nexus.ad.hrm.se/nexus/service/local/reposit…ent/se/hrmsoftware/hrm/hrm-release/16.1-SNAPSHOT/", relativePath: "/se/hrmsoftware/hrm/hrm-release/16.1-SNAPSHOT/", text: "16.1-SNAPSHOT", leaf: false, lastModified: "2018-05-02 06:57:07.0 UTC", …}

@FormParam为REST Jersey提供null Javascript

0 个答案: