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我正在用Struts2和Struts2 REST插件編寫一個RESTful服務。目前，我的服務能夠處理GET請求而沒有問題，但我一直試圖讓「更新」（PUT）請求正常工作。Struts2 REST插件：通過PUT發送JSON對象
我有兩種可能的模型，show（）的List和一個update（）的ClientFeature對象，其中ClientFeature是pojo類。
REST控制器：
public class ClientfeatureController extends ControllerParent implements ModelDriven<Object> {
private ClientFeature clientFeature = new ClientFeature();
private List<ClientFeature> clientFeatureList;
//Client ID
private String id;
public ClientfeatureController() {
super(ClientfeatureController.class);
}
@Override
public Object getModel() {
return (clientFeatureList != null ? clientFeatureList : clientFeature);
}
/**
* @return clientFeatureList through Struts2 model-driven design
*/
public HttpHeaders show() {
-logic for GET request here..-
//todo: add ETag and lastModified information for client caching purposes
return new DefaultHttpHeaders("show").disableCaching();
}
// PUT request: /clientfeature/update/<id> + JSON data
public String update() {
logger.info("client id: " + id);
logger.info("updated model test:" + clientFeature.getClientId());
return "update";
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public List<ClientFeature> getClientFeatureList() {
return clientFeatureList;
}
public void setClientFeatureList(List<ClientFeature> clientFeatureList) {
this.clientFeatureList = clientFeatureList;
}
}
ClientFeature：
public class ClientFeature {
private Long clientId;
private Feature feature;
private ArrayList<String> countries;
public ClientFeature() {
this.countries = new ArrayList<String>();
}
public Long getClientId() {
return clientId;
}
public void setClientId(Long clientId) {
this.clientId = clientId;
}
public Feature getFeature() {
return feature;
}
public void setFeature(Feature feature) {
this.feature = feature;
}
public ArrayList<String> getCountries() {
return countries;
}
public void setCountries(ArrayList<String> countries) {
this.countries = countries;
}
}
而且正在測試使用郵差Chrome擴展程序，服務和發送過JSON數據是這樣的：
{
"clientFeature": {
"feature" : {"featureId" : 999, "featureName" : "testFeature"}
"countries": ["CA","US"]
"clientId" : 001
}
}
和錯誤：
356572 [http-bio-8080-exec-6] WARN net.sf.json.JSONObject - Tried to assign property clientFeature:java.lang.Object to bean of class com.foo.bar.ClientFeature
我非常新的一切相關的，所以任何幫助將是非常讚賞。
編輯：
嘗試發送以下JSON：
{ 「com.foo.entity.clientFeature」：{ 「的clientId」：10}}
，並得到了以下全錯誤：
1016894 [http-bio-8080-exec-3] ERROR freemarker.runtime - Method public java.lang.String org.apache.commons.lang.exception.NestableRuntimeException.getMessage(int) threw an exception when invoked on net.sf.json.JSONException: Error while setting property=com.foo.entity.clientFeature type class java.lang.Object
Method public java.lang.String org.apache.commons.lang.exception.NestableRuntimeException.getMessage(int) threw an exception when invoked on net.sf.json.JSONException: Error while setting property=com.foo.entity.clientFeature type class java.lang.Object
The problematic instruction:
----------
==> ${msg[0]} [on line 68, column 29 in org/apache/struts2/dispatcher/error.ftl]
----------
Java backtrace for programmers:
----------
freemarker.template.TemplateModelException: Method public java.lang.String org.apache.commons.lang.exception.NestableRuntimeException.getMessage(int) threw an exception when invoked on net.sf.json.JSONException: Error while setting property=com.foo.entity.clientFeature type class java.lang.Object
at freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:130)
at freemarker.ext.beans.SimpleMethodModel.get(SimpleMethodModel.java:138)
at freemarker.core.DynamicKeyName.dealWithNumericalKey(DynamicKeyName.java:111)
at freemarker.core.DynamicKeyName._getAsTemplateModel(DynamicKeyName.java:90)
at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
at freemarker.core.Expression.getStringValue(Expression.java:93)
at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
at freemarker.core.Environment.visit(Environment.java:210)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:210)
at freemarker.core.IfBlock.accept(IfBlock.java:82)
at freemarker.core.Environment.visit(Environment.java:210)
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179)
at freemarker.core.Environment.visit(Environment.java:417)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102)
at freemarker.core.Environment.visit(Environment.java:210)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:210)
at freemarker.core.IfBlock.accept(IfBlock.java:82)
at freemarker.core.Environment.visit(Environment.java:210)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:210)
at freemarker.core.Environment.process(Environment.java:190)
at freemarker.template.Template.process(Template.java:237)
at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:797)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:519)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
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:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:851)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:278)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.NullPointerException
at freemarker.ext.beans.SimpleMemberModel.unwrapArguments(SimpleMemberModel.java:85)
at freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:106)
... 43 more