Jersey web services | 易学教程

问题

I am trying to set up a simple Java web application using jersey for web services. However I have de following problem. The tomcat server can’t find the resource http://localhost:8081/OnlineShop/rest/books/list but it can find my simple servlet http://localhost:8081/OnlineShop/index

I have the following web.xml

In the other hand I noticed that com.sun.jersey.spi.container.servlet.ServletContainer is present in my project because I added the dependency using maven however jersey.config.server.provider.packages is not present. Maybe that is the problem but I don’t know the exact dependency which I have to add.

My BookRest.java has the following code and is on the com.shop.rest package.

Finally my pom.xml has the following dependencies.

 <dependencies>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-server</artifactId>
        <version>1.19</version>
    </dependency>
    <dependency>
        <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib-ext-spring</artifactId>
        <version>1.0.2</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-servlet</artifactId>
        <version>1.18</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-core</artifactId>
        <version>1.19</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-client</artifactId>
        <version>1.19</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.core</groupId>
        <artifactId>jersey-common</artifactId>
        <version>2.17</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet-core</artifactId>
        <version>2.17</version>
    </dependency>
    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-web-api</artifactId>
        <version>7.0</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

回答1:

Please, please get rid of this whole project. You're obviously a beginner and seem to be just putting random configurations and dependencies together, maybe from different tutorials. Your dependencies are incompatible and your web.xml configuration is wrong. Like i said, scrap the whole project and start from scratch. If you are just beginning, you should use one of the startup apps.

You're in Netbeans, so just do the following

File → New Project
Maven → Project from Archetype
Search jersey-quickstart-webapp
Select the one with the Group ID org.glassfish.jersey.archetypes
The latest version should be displayed.
Should be self explanitory from there

You will that the only dependency added is

<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet-core</artifactId>
    <!-- use the following artifactId if you don't need servlet 2.x compatibility -->
    <!-- artifactId>jersey-container-servlet</artifactId -->
</dependency>

And the web.xml will look something like

<servlet>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value>com.stackoverflow.jersey</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>Jersey Web Application</servlet-name>
    <url-pattern>/api/*</url-pattern>
</servlet-mapping>

This will get you a simple app up and running. You will see a dependency that you need to un-comment for JSON support. Un-comment it. Or better yet, un-comment it, then change jersey-media-moxy to jersey-media-json-jackson. Jackson is IMO a better JSON library.

Also keep the Jersey Documentation handy for some good reading and reference material for working with Jersey

来源：https://stackoverflow.com/questions/30684707/jersey-web-services

标签

java

maven

jersey

java-web-start