@RequestBody使用字符串，但不使用pojo模型Rest Web服务

如果我使用字符串作为参数，但它不适用于模型类，那么为什么下面的服务可以完美地工作。我根本没有得到错误，但如果我使用模型而不是字符串，它总是接收null。注意：我在mvc dispatcher servelet和Java库中有mvc:annotation驱动。我的猜测是，在我将应用程序从Spring3更改为Spring4之前，库运行正常，所以我认为库有一些问题。拜托，能帮我查一下POM里还有什么需要的吗

@Controller
@RequestMapping("/log")
public class Lo_Controller {
       @RequestMapping(value="display/last2", method=RequestMethod.POST, headers = "Accept=application/json")
       @ResponseStatus(HttpStatus.CREATED)
       @ResponseBody
       //after taking out @ModelAtribute I don't reach this method when debugging
       public String getTest(@RequestBody Mas60010b mas60010b) { //if I change Mas60010b mas60010b to String strTest ...
              Lo_Mas60010 lo_Mas60010 = new Lo_Mas60010();
              System.out.println(mas60010b.getSubCd()); 
              //System.out.println(strTest); //... it will work
              return "returnTestPost";
       }

型号：

public class Mas60010b {
       private String subCd;
       private String firstDT;
       private String currDT;

       public String getSubCd() {
              return subCd;
       }

       public void setSubCd(String subCd) {
              this.subCd = subCd;
       }

       public String getFirstDT() {
              return firstDT;
       }

       public void setFirstDT(String firstDT) {
              this.firstDT = firstDT;
       }

       public String getCurrDT() {
              return currDT;
       }

       public void setCurrDT(String currDT) {
              this.currDT = currDT;
       }

客户测试人员

public class Main {
       public static void main(String[] args) throws ClientProtocolException, IOException {
              HttpClient client2 = new DefaultHttpClient();
              HttpPost post2 = new HttpPost("http://localhost:8080/MHE2/log/display/last2");
              Map<String, String> map2 = new HashMap<String, String>();
              map2.put("subCd", "A");                 
              map2.put("firstDT", "2014-09-29 00:00:00.0");
              map2.put("currDT", "2014-09-30 16:45:33.379731");

              ObjectMapper mapper2 = new ObjectMapper();
              String strJson2 = mapper2.writeValueAsString(map2);
              StringEntity input2 = new StringEntity(strJson2);

              input2.setContentType("application/json");
              post2.setEntity(input2);

              //Without @ModelAtribute I get [WARNING ] SRVE8094W: WARNING: Cannot set header. Response already committed.
              HttpResponse response2 = client2.execute(post2);

              BufferedReader rd2 = new BufferedReader(new InputStreamReader(response2.getEntity().getContent()));

              String line2 = "";

              while ((line2 = rd2.readLine()) != null) {

                     System.out.println(line2);

              }

       }

}

…
[警告]正在跳过[C:\Users\e04947.m2\repository\org\springframework\spring expression\4.1.2.RELEASE\spring-expression-4.1.2.RELEASE.jar]，因为它不表示目录

[WARNING ] SRVE8094W: WARNING: Cannot set header. Response already committed.

[12/3/14 8:55:38:812 CST] 0000001a ramework.core.io.support.PathMatchingResourcePatternResolver W Cannot search for matching files underneath URL [bundleresource://96.fwk327208746/] because it does not correspond to a directory in the file system

java.io.FileNotFoundException: URL [bundleresource://96.fwk327208746/] cannot be resolved to absolute file path because it does not reside in the file system: bundleresource://96.fwk327208746/

                at org.springframework.util.ResourceUtils.getFile(ResourceUtils.java:212)

                at org.springframework.core.io.AbstractFileResolvingResource.getFile(AbstractFileResolvingResource.java:52)

                at org.springframework.core.io.UrlResource.getFile(UrlResource.java:212)

---

正如@Bohuslav在其评论中所说，

@RequestBody

和

@modeldattribute

不得用于同一方法参数。请删除

@modeldattribute

，然后重试。之后，您的模型参数将正确填充。

我认为您不应该同时使用

@RequestBody

和

@modeldattribute

。试着使用just RequestBody看看这是否有什么不同。首先，感谢您的评论。我尝试删除@modeldattribute，但现在从客户端调用时得到“[WARNING]SRVE8094W:WARNING:无法设置头。响应已提交”。我添加了我的有效pom。我尝试从pom中取出jackson库并将其粘贴到web inf/lib中，然后手动添加它们，而不是使用maven，但我仍然面临着这个警告。我尝试了它，因为我可以看到问题只发生在向模型发送贴图时。pom可能有问题，因为在我将此项目转换为maven之前，此web服务工作正常。我获取了您的代码，创建了一个，并在我的机器上进行了尝试。这个项目运作得很好。只需将其下载到您的计算机上，然后以

mvn clean tomcat7:run

的形式运行即可。然后，使用一个AJAX客户端，如用于Chrome的Postman扩展，向

http://localhost:8080/log

。您应该可以看到提交的信息。我对POM-1做了一些小改动<代码>编译不是必需的。2.Servlet API必须提供作用域

。您可以生成一个WAR并部署到其他应用服务器，然后再试一次。非常感谢。因为您告诉我我的代码是正确的，并且您在Tomcat中运行了它，所以我开始关注Websphere Liberty概要文件配置，并通过添加json特性更改了server.xml。我不知道其中包含的每一件事情，但肯定是与此功能配置相关的东西。对于未来的读者，这是我的server.xml jsp-2.2 localConnector-1.0 jdbc-4.0 jaxrs-1.1 json-1.0的结尾…外加额外的数据源configsGreat！WebSphere要正确启动和运行总是一件痛苦的事情。
[WARNING ] Cannot search for matching files underneath URL [bundleresource://96.fwk327208746/] because it does not correspond to a directory in the file system

URL [bundleresource://96.fwk327208746/] cannot be resolved to absolute file path because it does not reside in the file system: bundleresource://96.fwk327208746/

[WARNING ] Cannot search for matching files underneath URL [bundleresource://95.fwk327208746/] because it does not correspond to a directory in the file system

URL [bundleresource://95.fwk327208746/] cannot be resolved to absolute file path because it does not reside in the file system: bundleresource://95.fwk327208746/

[WARNING ] Skipping [C:\STS\ws\MHE_original\WebContent\WEB-INF\lib\db2java.jar] because it does not denote a directory

[WARNING ] Skipping [C:\STS\ws\MHE_original\WebContent\WEB-INF\lib\jackson-core-asl-1.9.12.jar] because it does not denote a directory

[WARNING ] SRVE8094W: WARNING: Cannot set header. Response already committed.

[12/3/14 8:55:38:812 CST] 0000001a ramework.core.io.support.PathMatchingResourcePatternResolver W Cannot search for matching files underneath URL [bundleresource://96.fwk327208746/] because it does not correspond to a directory in the file system

java.io.FileNotFoundException: URL [bundleresource://96.fwk327208746/] cannot be resolved to absolute file path because it does not reside in the file system: bundleresource://96.fwk327208746/

                at org.springframework.util.ResourceUtils.getFile(ResourceUtils.java:212)

                at org.springframework.core.io.AbstractFileResolvingResource.getFile(AbstractFileResolvingResource.java:52)

                at org.springframework.core.io.UrlResource.getFile(UrlResource.java:212)

[12/3/14 8:55:39:470 CST] 0000001a b.servlet.mvc.method.annotation.RequestMappingHandlerMapping I Mapped "{[/log/display/last2],methods=[POST],params=[],headers=[],consumes=[],produces=[application/json],custom=[]}" onto public java.lang.String com.mastercard.mhe.common.controller.Lo_Controller.getTest(com.mastercard.mhe.log.domain2.Mas60010b)

[12/3/14 8:55:39:782 CST] 0000001a b.servlet.mvc.method.annotation.RequestMappingHandlerAdapter I Looking for @ControllerAdvice: WebApplicationContext for namespace 'mvc-dispatcher-servlet': startup date [Wed Dec 03 08:55:37 CST 2014]; parent: Root WebApplicationContext

[12/3/14 8:55:40:063 CST] 0000001a b.servlet.mvc.method.annotation.RequestMappingHandlerAdapter I Looking for @ControllerAdvice: WebApplicationContext for namespace 'mvc-dispatcher-servlet': startup date [Wed Dec 03 08:55:37 CST 2014]; parent: Root WebApplicationContext

[12/3/14 8:55:40:267 CST] 0000001a .springframework.web.servlet.handler.SimpleUrlHandlerMapping I Mapped URL path [/**] onto handler 'org.springframework.web.servlet.resource.ResourceHttpRequestHandler#0'

[12/3/14 8:55:40:313 CST] 0000001a org.springframework.web.servlet.DispatcherServlet            I FrameworkServlet 'mvc-dispatcher': initialization completed in 2548 ms

[12/3/14 8:55:40:313 CST] 0000001a com.ibm.ws.webcontainer.servlet                              I SRVE0242I: [MHE_original] [/MHE2] [mvc-dispatcher]: Initialization successful.

[12/3/14 8:55:40:470 CST] 00000022 SystemOut                                                    O null

[12/3/14 8:56:29:485 CST] 0000001a com.ibm.ws.webcontainer.srt                                  W SRVE8094W: WARNING: Cannot set header. Response already committed.