使用Java在eclipse中创建的Jersey Tomcat Web服务器的404错误

Question

I created a server starting from a dynamic web project. When I make a request to it by typing

http://localhost:8080/restserver/myserver

or

http://localhost:8080/restserver/myserver/myserver

into the search bar of my web browser I receive the response

HTTP Status 404 – Not Found

Type Status Report

Message /restserver/src/demo/demo

Description The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.
Apache Tomcat/9.0.13

I don't know what I need to change with my server program. I've been following this tutorial to set my server up, and it doesn't look like they have much more than me.

My expected response to my request is

I've tried just about everything. Deleting and reinstalling eclipse and tomcat, removing my ~/.m2/repository folder. The log file looks basically like this ,

127.0.0.1 - - [02/Dec/2018:13:09:20 -0600] "GET / HTTP/1.1" 404 1074
0:0:0:0:0:0:0:1 - - [02/Dec/2018:13:11:13 -0600] "GET /RestServer HTTP/1.1" 302 -
0:0:0:0:0:0:0:1 - - [02/Dec/2018:13:11:13 -0600] "GET /RestServer/ HTTP/1.1" 404 1089
0:0:0:0:0:0:0:1 - - [02/Dec/2018:13:11:14 -0600] "GET /favicon.ico HTTP/1.1" 404 1085
0:0:0:0:0:0:0:1 - - [02/Dec/2018:13:11:19 -0600] "GET /RestServer/myserver HTTP/1.1" 404 1097
0:0:0:0:0:0:0:1 - - [02/Dec/2018:13:11:19 -0600] "GET /favicon.ico HTTP/1.1" 404 1085
0:0:0:0:0:0:0:1 - - [02/Dec/2018:13:11:24 -0600] "GET /RestServer/myserver/myserver HTTP/1.1" 404 1110
0:0:0:0:0:0:0:1 - - [02/Dec/2018:13:11:24 -0600] "GET /favicon.ico HTTP/1.1" 404 1085

(I have know idea where the 302 cam from, just saw this)

so I'm thinking it might be that the requests aren't being authenticated because of the - in the third column? I also don't understand the catalina.properties file , but I followed those instructions and it didn't help. I also read a few things about proxies that I didn't really understand because I couldn't figure out how to disable proxies.

---

RestServer/pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>RestServer</groupId>
  <artifactId>RestServer</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.0</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>3.2.1</version>
        <configuration>
          <warSourceDirectory>WebContent</warSourceDirectory>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
        <dependency>
            <groupId>asm</groupId>
            <artifactId>asm</artifactId>
            <version>3.3.1</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-bundle</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20170516</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-core</artifactId>
            <version>1.19.4</version>
        </dependency>
    </dependencies>
</project>

---

RestServer/WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>RestServer</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>/serv/*</url-pattern>
  </servlet-mapping>
</web-app>

---

RestServer/Java Resources/src/serverPackage/MyServer.java

package serverPackage;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;

@Path("/myserver")
public class MyServer {
    @GET
    @Produces("application/xml")
    public String convertCtoF() {

        Double fahrenheit;
        Double celsius = 36.8;
        fahrenheit = ((celsius * 9) / 5) + 32;

        String result = "@Produces(\"application/xml\") Output: \n\nC to F Converter Output: \n\n" + fahrenheit;
        return "<ctofservice>" + "<celsius>" + celsius + "</celsius>" + "<ctofoutput>" + result + "</ctofoutput>" + "</ctofservice>";
    }

    @Path("{c}")
    @GET
    @Produces("application/xml")
    public String convertCtoFfromInput(@PathParam("c") Double c) {
        Double fahrenheit;
        Double celsius = c;
        fahrenheit = ((celsius * 9) / 5) + 32;

        String result = "@Produces(\"application/xml\") Output: \n\nC to F Converter Output: \n\n" + fahrenheit;
        return "<ctofservice>" + "<celsius>" + celsius + "</celsius>" + "<ctofoutput>" + result + "</ctofoutput>" + "</ctofservice>";
    }
}

---

My current file directory

---

Update

I changed

  <servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>/serv/*</url-pattern>
  </servlet-mapping>

to

<servlet>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>Jersey Web Application</servlet-name>
    <url-pattern>/serv/*</url-pattern>
</servlet-mapping>

And now when I visit http://localhost:8080/RestServer/serv/myserver

I receive the error

HTTP Status 500 – Internal Server Error
Type Exception Report

Message Servlet.init() for servlet [Jersey Web Application] threw exception

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

javax.servlet.ServletException: Servlet.init() for servlet [Jersey Web Application] threw exception
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
    org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
    org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:791)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
    org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.base/java.lang.Thread.run(Thread.java:834)
Root Cause

java.lang.TypeNotPresentException: Type javax.xml.bind.JAXBContext not present
    java.base/sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(CoreReflectionFactory.java:117)
    java.base/sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:125)
    java.base/sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)
    java.base/sun.reflect.generics.visitor.Reifier.reifyTypeArguments(Reifier.java:68)
    java.base/sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:138)
    java.base/sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)
    java.base/sun.reflect.generics.repository.ClassRepository.computeSuperInterfaces(ClassRepository.java:117)
    java.base/sun.reflect.generics.repository.ClassRepository.getSuperInterfaces(ClassRepository.java:95)
    java.base/java.lang.Class.getGenericInterfaces(Class.java:1138)
    com.sun.jersey.core.reflection.ReflectionHelper.getClass(ReflectionHelper.java:629)
    com.sun.jersey.core.reflection.ReflectionHelper.getClass(ReflectionHelper.java:625)
    com.sun.jersey.core.spi.factory.ContextResolverFactory.getParameterizedType(ContextResolverFactory.java:202)
    com.sun.jersey.core.spi.factory.ContextResolverFactory.init(ContextResolverFactory.java:89)
    com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1332)
    com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:180)
    com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:799)
    com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:795)
    com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193)
    com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:795)
    com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:790)
    com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:509)
    com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:339)
    com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605)
    com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:207)
    com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:394)
    com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:577)
    javax.servlet.GenericServlet.init(GenericServlet.java:158)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
    org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
    org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:791)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
    org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.base/java.lang.Thread.run(Thread.java:834)
Root Cause

java.lang.ClassNotFoundException: javax.xml.bind.JAXBContext
    org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1328)
    org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
    java.base/java.lang.Class.forName0(Native Method)
    java.base/java.lang.Class.forName(Class.java:398)
    java.base/sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(CoreReflectionFactory.java:114)
    java.base/sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:125)
    java.base/sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)
    java.base/sun.reflect.generics.visitor.Reifier.reifyTypeArguments(Reifier.java:68)
    java.base/sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:138)
    java.base/sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)
    java.base/sun.reflect.generics.repository.ClassRepository.computeSuperInterfaces(ClassRepository.java:117)
    java.base/sun.reflect.generics.repository.ClassRepository.getSuperInterfaces(ClassRepository.java:95)
    java.base/java.lang.Class.getGenericInterfaces(Class.java:1138)
    com.sun.jersey.core.reflection.ReflectionHelper.getClass(ReflectionHelper.java:629)
    com.sun.jersey.core.reflection.ReflectionHelper.getClass(ReflectionHelper.java:625)
    com.sun.jersey.core.spi.factory.ContextResolverFactory.getParameterizedType(ContextResolverFactory.java:202)
    com.sun.jersey.core.spi.factory.ContextResolverFactory.init(ContextResolverFactory.java:89)
    com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1332)
    com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:180)
    com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:799)
    com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:795)
    com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193)
    com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:795)
    com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:790)
    com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:509)
    com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:339)
    com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605)
    com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:207)
    com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:394)
    com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:577)
    javax.servlet.GenericServlet.init(GenericServlet.java:158)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
    org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
    org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:791)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
    org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.base/java.lang.Thread.run(Thread.java:834)
Note The full stack trace of the root cause is available in the server logs.

Updated local_host_accesslog

127.0.0.1 - - [03/Dec/2018:01:34:47 -0600] "GET / HTTP/1.1" 404 1074
0:0:0:0:0:0:0:1 - - [03/Dec/2018:01:39:55 -0600] "GET /myserver HTTP/1.1" 404 1082
0:0:0:0:0:0:0:1 - - [03/Dec/2018:01:39:57 -0600] "GET /favicon.ico HTTP/1.1" 404 1085
0:0:0:0:0:0:0:1 - - [03/Dec/2018:01:40:15 -0600] "GET /RestServer/myserver HTTP/1.1" 404 1097
0:0:0:0:0:0:0:1 - - [03/Dec/2018:01:40:21 -0600] "GET /RestServer/serv/myserver HTTP/1.1" 500 10064

---

Updated pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>RestServer</groupId>
  <artifactId>RestServer</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.0</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>3.2.1</version>
        <configuration>
          <warSourceDirectory>WebContent</warSourceDirectory>
        </configuration>
      </plugin>

    </plugins>
  </build>
  <dependencies>
        <dependency>
            <groupId>asm</groupId>
            <artifactId>asm</artifactId>
            <version>3.3.1</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-bundle</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20170516</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-core</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
            <version>2.2.6</version>
        </dependency>
        <dependency>
            <groupId>com.googlecode.json-simple</groupId>
            <artifactId>json-simple</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>3.0.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>javax.activation</groupId>
            <artifactId>activation</artifactId>
            <version>1.1.1</version>
        </dependency>
    </dependencies>
</project>

Answer 1

You need to use Jersey controller com.sun.jersey.spi.container.servlet.ServletContainer in your mapping and specify the resources path

<init-param> 
   <param-name>com.sun.jersey.config.property.packages</param-name> 
   <param-value>com.resources</param-value>  <!--comma separated packages-->
</init-param>

and add dependency for class javax.xml.bind.JAXBContext

<dependency> 
   <groupId>javax.xml.bind</groupId> 
   <artifactId>jaxb-api</artifactId> 
   <version>2.2.6</version> 
</dependency>

With respect to web module version 4, I am able to run the application. I am using java 8 and tomcat 9.

Please post comments if you require help for the same

Answer 2

Although the build wass SUCCESS I gοt initially a HTTP Status 404 – Not Found. I followed all previous suggestions and I got in console a similar error. After following the markers errors and warning and searched a little bit.

First step:

I went to project right click -> properties -> Deployment Assembly and I added the Maven Depencencies Libray, after that another severe warning appeared.

Second Step: It seemed that a depedency in pom was needed to work flawlessly

<dependency>
    <groupId>com.sun.xml.bind</groupId>
    <artifactId>jaxb-impl</artifactId>
    <version>2.1.2</version>
</dependency>

just before jaxb-api

The major problem for me for all those frameworks working together are the settings in eclipse. you need to be able to have installed and connected compatible resources. For example, I also managed to run properly the Dynamic Web Project 4.0 like mentioned above

Third Step:

It came to my attention that you mention this

<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
  <source>1.6</source>
  <target>1.6</target>
</configuration>

In that case, mentioning source and target version means that your whole project is going to be compiled in Java 1.6 compatibility. Maybe that is why you couldn't run it as a Dynamic Web Project 4.0 because it needs Java 1.8 and newer. In my scenario, I set up all the preferences right, then executed that pom and it reverted everything to Java 1.6 in the options, so I just removed it and it executed properly