Servlet接口不是javax.servlet.Servlet [英] Servlet interface is not a javax.servlet.Servlet

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问题描述



我使用的是谷歌应用程序引擎，并且使用rpc servlet 编写如下

p> 

 <！ -  Servlets  - > 
< servlet> 
< servlet-name> RealEstate_Service< / servlet-name> 
< servlet-class> com.app.realestate.navi.client.RealEstateService< / servlet-class> 
 
< / servlet> 
< servlet-mapping> 
< servlet-name> RealEstate_Service< / servlet-name> 
< url-pattern> / real_estate / realEstateService /< / url-pattern> 
< / servlet-mapping>

RealEstateService 

  @RemoteServiceRelativePath（realEstateService）
 public interface RealEstateService扩展RemoteService {
 ArrayList< ProjectDetails> getProjectDetails（）; 
} 
 
 public interface RealEstateServiceAsync {
 public void getProjectDetails（AsyncCallback< ArrayList< ProjectDetails>> callback）; 
}

RealEstateServiceImpl 

  @SuppressWarnings（ 串行）
公共类RealEstateServiceImpl延伸RemoteServiceServlet实现RealEstateService {
 
私有静态最后字符串[] contactsFirstNameData = new String [] {
Hollie，Emerson，Healy，Brigitte，Elba，Claudio，
Dena，Christina，Gail， Orville，Rae，Mildred，
Candice，Louise，Emilio，Geneva，Heriberto，Bulrush，
Abigail， ，特里，贝尔}; 
 
 private final String [] contactsLastNameData = new String [] {
Voss，Milton，Colette，Cobb，Lockhart，Engle，
Pacheco，Blake，Horton，Daniel，Childers，Starnes，
Carson，Kelchner，Hutchinson，Underwood，Rush Bouchard，
Louis，Andrews，English，Snedden}; 
 
 private final String [] contactsEmailData = new String [] {
mark@example.com，hollie@example.com，boticario@example.com，
emerson@example.com，healy@example.com，brigitte@example.com，
elba@example.com，claudio@example.com，dena @ example .com，
brasilsp@example.com，parker@example.com，derbvktqsr@example.com，
qetlyxxogg@example.com，antenas_sul@example.com ，
cblake@example.com，gailh@example.com，orville@example.com，
post_master@example.com，rchilders@example.com， buster@example.com，
user31065@example.com，ftsgeolbx@example.com}; 
 
 private final HashMap< String，Project> projects = new HashMap< String，Project>（）; 
 
 public RealEstateServiceImpl（）{
 initProjects（）; 
 
 $ b $ private void initProjects（）{
 // TODO：为每个联系人创建一个真实的UID 
 // 
 for（int i = 0 ; i< contactsFirstNameData.length&& i< contactsLastNameData.length&& i< contactsEmailData.length; ++ i）{
 Project project = new Project（String.valueOf（i）， contactsFirstNameData [i]，contactsLastNameData [i]，contactsEmailData [i]）; 
 projects.put（project.getId（），project）; 
 
 
 
 public Project addProject（Project project）{
 project.setId（String.valueOf（projects.size（）））; 
 projects.put（project.getId（），project）; 
返回项目; 
} 
 
 public project updateProject（Project project）{
 projects.remove（project.getId（））; 
 projects.put（project.getId（），project）; 
返回项目; 
 
 $ b $ public Boolean deleteProject（String id）{
 projects.remove（id）; 
返回true; 
} 
 
 public ArrayList< ProjectDetails> deleteProject（ArrayList< String> id）{
 
 for（int i = 0; i< ids.size（）; ++ i）{
 deleteProject（ids.get（i） ）; 
} 
 
 return getProjectDetails（）; 
} 
 
 public ArrayList< ProjectDetails> getProjectDetails（）{
 ArrayList< ProjectDetails> projectDetails = new ArrayList< ProjectDetails>（）; 
 
迭代器< String> it = projects.keySet（）。iterator（）; 
 while（it.hasNext（））{
 Project contact = projects.get（it.next（））; 
 projectDetails.add（contact.getLightWeightContact（））; 
} 
 
 return projectDetails; 
} 
 
 public Project getProject（String id）{
 return projects.get（id）; 
} 
 
 
}

RPC调用faies以下错误：

  2013年4月13日上午4:19:02 com.google.appengine.tools.development.ApiProxyLocalImpl log 
 SEVERE：javax.servlet.ServletContext日志：不可用
 javax.servlet.UnavailableException：Servlet接口com.app.realestate.navi.client.RealEstateService不是在org中的javax.servlet.Servlet 
 .mortbay.jetty.servlet.ServletHolder.checkServletType（ServletHolder.java:362）
 at org.mortbay.jetty.servlet.ServletHolder.doStart（ServletHolder.java:243）
 at org.mortbay.component .AbstractLifeCycle.start（AbstractLifeCycle.java:50）
 at org.mortbay.jetty.servlet.ServletHandler.initialize（ServletHandler.java:685）
 at org.mortbay.jetty.servlet.Context.startContext （Context.java:140）在org.mortbay.jetty.webapp.WebAppContext.startContext 
（WebAppContext.java:1250）
在org.mortbay.jetty.handler.ContextHandler.doStart（ContextHan 
 at org.mortbay.jetty.webapp.WebAppContext.doStart（WebAppContext.java:467）
 at org.mortbay.component.AbstractLifeCycle.start（AbstractLifeCycle.java:50）在org.mortbay.jetty.handler.HandlerWrapper.doStart（HandlerWrapper.java:130）
 
在org.mortbay.component.AbstractLifeCycle.start（AbstractLifeCycle.java:50）
。在组织.mortbay.jetty.handler.HandlerWrapper.doStart（HandlerWrapper.java:130）
 at org.mortbay.jetty.Server.doStart（Server.java:224）
 at org.mortbay.component.AbstractLifeCycle .start（AbstractLifeCycle.java:50）
，位于com.google.appengine.tools.development.JettyContainerService.startContainer（JettyContainerService.java:228）
位于com.google.appengine.tools.development.AbstractContainerService .STARTUP（AbstractContainerService.java:255）
在com.google.appengine.tools.development.AbstractServer.startup（AbstractServer.java:79）
在com.google.appengine.tools.development.DevAppServerImpl $服务器。 （DevAppServerImpl.java:451）
，位于com.google.appengine.tools.development.DevAppServerImpl.start（DevAppServerImpl.java:198）
，位于com.google.appengine.tools.development.gwt。 AppEngineLauncher.start（AppEngineLauncher.java:97）
在com.google.gwt.dev.DevMode.doStartUpServer（DevMode.java:509）
在com.google.gwt.dev.DevModeBase.startUp（ DevModeBase.java:1093）
位于com.google.gwt.dev.DevModeBase.run（DevModeBase.java:836）
位于com.google.gwt.dev.DevMode.main（DevMode.java： 311）


解决方案

您的web.xml映射错误。您应该使用RealEstateServiceImpl而不是RealEstateService 

 < servlet> 
< servlet-name> RealEstate_Service< / servlet-name> 
< servlet-class> com.app.realestate.navi.client.RealEstateServiceImpl< / servlet-class> 
< / servlet>

注意：在业余时间，请通过GWT RPC的基本信息此处。


hi this bug not able to trace - help required .

I am using google app engine and writing rpc servlet as below 

<!-- Servlets -->
<servlet>
    <servlet-name>RealEstate_Service</servlet-name>
    <servlet-class>com.app.realestate.navi.client.RealEstateService</servlet-class>

</servlet>
<servlet-mapping>
    <servlet-name>RealEstate_Service</servlet-name>
    <url-pattern>/real_estate/realEstateService/</url-pattern>
</servlet-mapping>

RealEstateService 

@RemoteServiceRelativePath("realEstateService")
public interface RealEstateService extends RemoteService {
ArrayList<ProjectDetails> getProjectDetails();
}

public interface RealEstateServiceAsync {
    public void getProjectDetails(AsyncCallback<ArrayList<ProjectDetails>> callback);
}

RealEstateServiceImpl 

@SuppressWarnings("serial")
public class RealEstateServiceImpl extends RemoteServiceServlet implements RealEstateService{

      private static final String[] contactsFirstNameData = new String[] {
          "Hollie", "Emerson", "Healy", "Brigitte", "Elba", "Claudio",
          "Dena", "Christina", "Gail", "Orville", "Rae", "Mildred",
          "Candice", "Louise", "Emilio", "Geneva", "Heriberto", "Bulrush", 
          "Abigail", "Chad", "Terry", "Bell"};

      private final String[] contactsLastNameData = new String[] {
          "Voss", "Milton", "Colette", "Cobb", "Lockhart", "Engle",
          "Pacheco", "Blake", "Horton", "Daniel", "Childers", "Starnes",
          "Carson", "Kelchner", "Hutchinson", "Underwood", "Rush", "Bouchard", 
          "Louis", "Andrews", "English", "Snedden"};

      private final String[] contactsEmailData = new String[] {
          "mark@example.com", "hollie@example.com", "boticario@example.com",
          "emerson@example.com", "healy@example.com", "brigitte@example.com",
          "elba@example.com", "claudio@example.com", "dena@example.com",
          "brasilsp@example.com", "parker@example.com", "derbvktqsr@example.com",
          "qetlyxxogg@example.com", "antenas_sul@example.com",
          "cblake@example.com", "gailh@example.com", "orville@example.com",
          "post_master@example.com", "rchilders@example.com", "buster@example.com",
          "user31065@example.com", "ftsgeolbx@example.com"};

      private final HashMap<String, Project> projects = new HashMap<String, Project>();

      public RealEstateServiceImpl() {
        initProjects();
      }

      private void initProjects() {
        // TODO: Create a real UID for each contact
        //
        for (int i = 0; i < contactsFirstNameData.length && i < contactsLastNameData.length && i < contactsEmailData.length; ++i) {
          Project project = new Project(String.valueOf(i), contactsFirstNameData[i], contactsLastNameData[i], contactsEmailData[i]);
          projects.put(project.getId(), project); 
        }
      }

      public Project addProject(Project project) {
          project.setId(String.valueOf(projects.size()));
          projects.put(project.getId(), project); 
        return project;
      }

      public Project updateProject(Project project) {
          projects.remove(project.getId());
          projects.put(project.getId(), project); 
          return project;
      }

      public Boolean deleteProject(String id) {
          projects.remove(id);
        return true;
      }

      public ArrayList<ProjectDetails> deleteProjects(ArrayList<String> ids) {

        for (int i = 0; i < ids.size(); ++i) {
            deleteProject(ids.get(i));
        }

        return getProjectDetails();
      }

      public ArrayList<ProjectDetails> getProjectDetails() {
        ArrayList<ProjectDetails> projectDetails = new ArrayList<ProjectDetails>();

        Iterator<String> it = projects.keySet().iterator();
        while(it.hasNext()) { 
          Project contact = projects.get(it.next());          
          projectDetails.add(contact.getLightWeightContact());
        }

        return projectDetails;
      }

      public Project getProject(String id) {
        return projects.get(id);
      }


}

RPC call faies with following error

Apr 13, 2013 4:19:02 AM com.google.appengine.tools.development.ApiProxyLocalImpl log
SEVERE: javax.servlet.ServletContext log: unavailable
javax.servlet.UnavailableException: Servlet interface com.app.realestate.navi.client.RealEstateService is not a javax.servlet.Servlet
    at org.mortbay.jetty.servlet.ServletHolder.checkServletType(ServletHolder.java:362)
    at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:243)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685)
    at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
    at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
    at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
    at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
    at org.mortbay.jetty.Server.doStart(Server.java:224)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:228)
    at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:255)
    at com.google.appengine.tools.development.AbstractServer.startup(AbstractServer.java:79)
    at com.google.appengine.tools.development.DevAppServerImpl$Servers.startup(DevAppServerImpl.java:451)
    at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:198)
    at com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:97)
    at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
    at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1093)
    at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:836)
    at com.google.gwt.dev.DevMode.main(DevMode.java:311)

解决方案

Your web.xml mapping is wrong. You should be using RealEstateServiceImpl instead of RealEstateService

<servlet>
        <servlet-name>RealEstate_Service</servlet-name>
        <servlet-class>com.app.realestate.navi.client.RealEstateServiceImpl</servlet-class>
</servlet>

Note: In your spare time please go through basic information on GWT RPC here.

这篇关于Servlet接口不是javax.servlet.Servlet的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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