Create a RestFul Service In java Wit Maven, Spring and Jax-Rs

Hello everybody, if we want create a rest service using Maven we can follow the next steps:

1. We'll create a maven web project, in this example we'll name it RestMaven.

2. We edit the pom.xml file as follows

 <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.co</groupId>   
  <artifactId>RestMaven</artifactId>   
  <packaging>war</packaging>   
  <version>0.0.1-SNAPSHOT</version>   
  <name>RestMaven Maven Webapp</name>   
  <url>http://maven.apache.org</url>   
  <dependencies>   
   <dependency>   
     <groupId>junit</groupId>   
     <artifactId>junit</artifactId>   
     <version>3.8.1</version>   
     <scope>test</scope>   
    </dependency>   
    <dependency>   
     <groupId>javax.servlet</groupId>   
     <artifactId>javax.servlet-api</artifactId>   
     <version>3.1.0</version>   
    </dependency>   
    <dependency>   
     <groupId>javax.servlet</groupId>   
     <artifactId>jstl</artifactId>   
     <version>1.2</version>   
    </dependency>     
    <dependency>   
      <groupId>com.sun.jersey</groupId>   
      <artifactId>jersey-server</artifactId>   
      <version>1.9</version>   
   </dependency>   
  </dependencies>   
  <build>   
   <finalName>RestMaven</finalName>   
  </build>   
  </project>   

3. Right click on project, select Properties -> Java Build Path and latter we remove the following directories:

4. In the same window we create a java folder as we can see in the next picture

5. Right click on project -> Properties -> Project Facets and we mark JAX-RS option as follows

6. Now we create a package in Java folder that we created in the 4 step.

com.co.RestServices.controller.controller

This package you can name it when you want.

7. We edit the web.xml file as follows

 <?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>Archetype Created Web Application</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>RestMaven</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.co.RestServices.controller.controller</param-value>   
       </init-param>   
       <load-on-startup>1</load-on-startup>   
    </servlet>   
    <servlet-mapping>   
       <servlet-name>RestMaven</servlet-name>   
       <url-pattern>/rest/*</url-pattern>   
    </servlet-mapping>   
  </web-app>   

8. We create a Class for management the rest service, in this example we'll calle it RestMain

 package com.co.RestServices.controller.controller;  
 import javax.ws.rs.FormParam;  
 import javax.ws.rs.POST;  
 import javax.ws.rs.Path;  
 import javax.ws.rs.Produces;  
 import javax.ws.rs.core.MediaType;  
 import javax.ws.rs.core.Response;  
 @Path("/")   
 public class RestMain {  
      @POST   
      @Path("/postMain")   
      @Produces(MediaType.APPLICATION_JSON)   
   public Response postMain(@FormParam("value") String value) {   
      String response = "{'Message': '"+value+"'}";        
      return Response.ok(response, MediaType.APPLICATION_JSON).build();      
   }   
 }  

9. Now we can try the rest service, in this example we use Google Advanced REST client.