我正试图在Android上的Jetty上运行Jersey。
我创建了一个用Jersey Servlet实例化Jetty服务器的Android。无论如何,当我启动Jetty并访问REST资源(在我的情况下:http://192.168.1.12:8080/api/hello
)时,我得到一个带有消息的ContainerException:ResourceConfig实例不包含任何根资源类。 (参见下面的异常堆栈跟踪)。
知道为什么吗?
更多细节:
Logcat正在发出以下严重警告。
The following errors and warnings have been detected with resource and/or provider classes:
SEVERE: Missing dependency for field: private java.lang.ThreadLocal com.sun.jersey.server.impl.container.servlet.JSPTemplateProcessor.requestInvoker
SEVERE: Missing dependency for field: private java.lang.ThreadLocal com.sun.jersey.server.impl.container.servlet.JSPTemplateProcessor.requestInvoker
这是奇怪的原因java.lang.ThreadLocal可用于Android,HttpServletRequest和HttpServletResponse应该可用,因为我在libs文件夹中包含了servlet-api-2.5.jar。
Jersey依赖于一些javax库(jaxb-api-2.2.2.jar,jndi-1.2.1.jar,stax-api-1.0-2.jar),我必须将其添加到项目中并设置 - -core-library参数temporary以忽略关于javax包作为依赖项的dex警告。
我还从jersey core jar中删除了以下类(来自包com.sun.jersey.core.impl.provider.entity的RenderedImageProvider,DataSourceProvider,MimeMultipartProvider),以避免依赖于java.awt和javax.mail。
EXCEPTION追踪:
javax.servlet.UnavailableException: com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes.
at org.eclipse.jetty.servlet.ServletHolder.makeUnavailable(ServletHolder.java:409)
at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:450)
at org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:331)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:476)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:517)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:935)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:404)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:184)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:870)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:346)
at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:596)
at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1051)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:592)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:214)
at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:426)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:520)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:528)
at java.lang.Thread.run(Thread.java:1019)
启动服务器Android活动:
public class StartServerActivity extends Activity {
private Server webServer;
private final static String LOG_TAG = "Jetty";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
System.setProperty("java.net.preferIPv4Stack", "true");
System.setProperty("java.net.preferIPv6Addresses", "false");
webServer = new Server(8080);
ServletHolder servletHolder = new ServletHolder(com.sun.jersey.spi.container.servlet.ServletContainer.class);
servletHolder.setInitParameter("com.sun.jersey.config.property.packages", "com.famenu.server.resources");
ServletContextHandler servletContextHandler = new ServletContextHandler(webServer, "/api", true, false);
servletContextHandler.addServlet(servletHolder, "/hello");
webServer.setHandler(servletContextHandler);
try {
webServer.start();
Log.d(LOG_TAG, "started Web server");
}
catch (Exception e) {
Log.d(LOG_TAG, "unexpected exception starting Web server: " + e);
}
}
}
泽西资源:
package com.famenu.server.resources;
import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces;
@Path( “/”) 公共类HelloResource {
@GET
@Produces("text/plain")
public String getMsg() {
return "Hello Resource";
}
}
我正在使用Jetty 7.3.0.v20110203,Jersey 1.12,Android 1.6 在另一个例外解释here
之后,我到了这一点答案 0 :(得分:2)
不要在不支持的平台上使用包/任何其他扫描。
Classnames属性:com.sun.jersey.config.property.classnames应该适合您(您需要显式声明所有根资源(@Path annotated)类。)