CODEWITHSUNDEEP
javamavenjerseyjax-rs
jiri463
jiri463

Reputation: 869

jersey helloworld with maven deployed on tomcat7

I want to create jersey, maven, tomcat helloworld app. I followed this tutorial for maven, tomcat setting and this tutorial for helloworld app creating. My implementation can be downloaded from here, important files are below:

HelloWorldService.java

package com.mkyong.rest;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.Response;

@Path("/hello")
public class HelloWorldService {
    @GET
    @Path("/{param}")
    public Response getMsg(@PathParam("param") String msg) {

        String output = "Jersey say : " + msg;
        return Response.status(200).entity(output).build();
    }
}

web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app id="WebApp_ID" version="2.4"
    xmlns="http://java.sun.com/xml/ns/j2ee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <display-name>Restful Web Application</display-name>

    <servlet>
        <servlet-name>jersey-serlvet</servlet-name>
        <servlet-class>
                     com.sun.jersey.spi.container.servlet.ServletContainer
                </servlet-class>
        <init-param>
             <param-name>com.sun.jersey.config.property.packages</param-name>
             <param-value>com.mkyong.rest</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>jersey-serlvet</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping>

</web-app>

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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.mkyong.rest</groupId>
  <artifactId>RESTfulExample</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>RESTfulExample Maven Webapp</name>
  <url>http://maven.apache.org</url>

    <repositories>
        <repository>
            <id>maven2-repository.java.net</id>
            <name>Java.net Repository for Maven</name>
            <url>http://download.java.net/maven/2/</url>
            <layout>default</layout>
        </repository>
    </repositories>



    <dependencies>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>3.8.1</version>
                 <scope>test</scope>
            </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.8</version>
        </dependency>
    </dependencies>

  <build>
        <finalName>RESTfulExample</finalName>
    <plugins>
        <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
            <artifactId>tomcat7-maven-plugin</artifactId>
            <version>2.2</version>
                <configuration>
                    <url>http://localhost:8080/manager/text</url>
                    <server>TomcatServer</server>
                    <path>/RESTFulExample</path>
             </configuration>
        </plugin>
    </plugins>
  </build>
</project>

index.jsp

<html>
<body>
<h2>Hello World!</h2>
</body>
</html>

When I write: mvn tomcat7:deploy everything is OK and app is deployed. And Hello World on localhost:8080/RESTFulExample/ is shown. But when I go to localhost:8080/RESTFulExample/rest/hello/something the exception: 

javax.servlet.ServletException: Servlet.init() for servlet jersey-serlvet threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)

is throwed. Any idea where problem can be? Thanks.

Upvotes: 1

Views: 1269

Answers (1)

Paul Samsotha
Paul Samsotha

Reputation: 209082

After looking through your project, the problem is with your directory structure

src/main/com/mkyong/rest

A Maven project has a strict project structure

src/
    main/
        java/    <===== You are missing this
            com/mkyong/rest

So when you build the project, your HelloService.java file doesn't get compiled to the required .class file. In a Maven project, you can look in the target/classes, and in a webapp, in the WEB-INF/classes. This is where the .class files are compiled to. You can check there and you won't find anything.

So if you add the java directory in the correct location, and build the project again, you should see the .class files in the correct location, and the application should work.

Upvotes: 2

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