Servlet类com.foobar.jaxrs.application.MyApplication不是javax.servlet.Servlet [英] Servlet class com.foobar.jaxrs.application.MyApplication is not a javax.servlet.Servlet
问题描述
我正在尝试使用Servlet 3.1和一个Application Subclass配置Jersey.一直在阅读文档并尝试解决这个问题,但是我不确定这里出了什么问题.
I'm trying to configure Jersey with Servlet 3.1 and an Application Subclass. Been reading documentation for a while and trying to get this going, but i'm not sure what's wrong here.
web.xml(尽管我不需要一个,但我得到的却是一个没有404的404 ...)
web.xml (though I shouldn't need one I get a 404 without one...)
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
id="WebApp_ID" version="3.1">
<display-name>Foobar Models</display-name>
<welcome-file-list>
<welcome-file>index.htm</welcome-file>
</welcome-file-list>
<session-config>
<session-timeout>30</session-timeout>
<cookie-config>
<name>SESSIONID</name>
</cookie-config>
</session-config>
<servlet>
<servlet-name>Foo Bar Application</servlet-name>
<servlet-class>com.foobar.jaxrs.application.FooBarApplication</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Foo Bar Application</servlet-name>
<url-pattern>/api/*</url-pattern>
</servlet-mapping>
</web-app>
应用子类
package com.foobar.jaxrs.application;
import java.util.HashSet;
import java.util.Set;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
@ApplicationPath("/api")
public class FooBarApplication extends Application {
public Set<Class<?>> getClasses() {
Set<Class<?>> s = new HashSet<Class<?>>();
s.add(com.foobar.api.HealthCheckResource.class);
return s;
}
}
HealthCheckResource.java
HealthCheckResource.java
package com.foobar.api;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
@Path("health")
public class HealthCheckResource {
@GET
@Produces("text/html")
public String getHeath() {
return "Foo Bar Application is healthy!";
}
}
在码头上奔跑(与Tomcat 8相同)
Running in jetty (same in Tomcat 8)
HTTP ERROR 404
Problem accessing /foobar/api/health. Reason:
Servlet class com.foobar.jaxrs.application.FooBarApplication is not a javax.servlet.Servlet
Caused by:
javax.servlet.UnavailableException: Servlet class com.foobar.jaxrs.application.FooBarApplication 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)
....
推荐答案
我发现了问题-我在gradle的Jetty插件中运行,该插件使用Servlet 2.5,但我正在部署Servlet 3.1应用程序.在使用正确的配置部署到Tomcat 8之后,我能够在没有web.xml的情况下使其正常工作.
I figured out the issue - I was running in gradle's jetty plugin which uses servlet 2.5 but i'm deploying a servlet 3.1 app. I was able to get it to work without the web.xml after deploying to Tomcat 8 with the correct configuration.
它仍然不能与Jetty一起使用(需要获得Jetty的更新版本),但是在Tomcat 8中,它可以工作:
It still doesnt work with Jetty (need to get an updated version of jetty), but in Tomcat 8 this works:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
id="WebApp_ID" version="3.1">
<display-name>Foo Bar Models</display-name>
<welcome-file-list>
<welcome-file>index.htm</welcome-file>
</welcome-file-list>
</web-app>
BaseApplication.java 包com.foobar.jaxrs.application;
BaseApplication.java package com.foobar.jaxrs.application;
import java.util.HashSet;
import java.util.Set;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
@ApplicationPath("")
public class BaseApplication extends Application {
@Override
public Set<Class<?>> getClasses() {
Set<Class<?>> s = new HashSet<Class<?>>();
s.add(com.patrickkee.resources.HealthCheckResource.class);
return s;
}
}
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