10. HelloRestFullServer - AntonioDiaz/examples.spring.mvc GitHub Wiki
Proof of concept of a Rest service using Spring MVC 4.
Thanks to: http://howtodoinjava.com/spring/spring-restful/spring-rest-hello-world-json-example/
- Project structure
- Call example
- pom.xml
- applicationContext.xml
- EmployeeRESTController.java
- Rest client
<properties>
<spring.version>4.1.4.RELEASE</spring.version>
<jstl.version>1.2</jstl.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.5</version>
</dependency>
</dependencies><context:component-scan base-package="com" />
<mvc:annotation-driven></mvc:annotation-driven> package com.controllers;
import java.util.ArrayList;
import java.util.List;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import com.entities.EmployeeVO;
@RestController
public class EmployeeRESTController {
@RequestMapping(value="/employees/", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
public List<EmployeeVO> listEmployees() {
List<EmployeeVO> employees = new ArrayList<EmployeeVO>();
employees.add(new EmployeeVO(1, "First", "Gupta", "[email protected]"));
employees.add(new EmployeeVO(2, "Second", "Another", "[email protected]"));
employees.add(new EmployeeVO(3, "Third", "Surname", "[email protected]"));
return employees;
}
@RequestMapping(value = "/employees/{id}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<EmployeeVO> getEmployeeById(@PathVariable("id") int id) {
ResponseEntity<EmployeeVO> response;
if (id <= 3) {
EmployeeVO employee = new EmployeeVO(1, "Lokesh", "Gupta", "[email protected]");
response = new ResponseEntity<EmployeeVO>(employee, HttpStatus.OK);
} else {
response = new ResponseEntity<EmployeeVO>(HttpStatus.NOT_FOUND);
}
return response;
}
}RestTemplate example:
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;
import com.entities.EmployeeVO;
public class RestClientList {
public static void main(String[] args) {
final String uri = "http://localhost:8080/helloRestFullServer/employees/";
RestTemplate restTemplate = new RestTemplate();
ResponseEntity<EmployeeVO[]> forEntity = restTemplate.getForEntity(uri, EmployeeVO[].class);
System.out.println(forEntity.getStatusCode());
System.out.println(forEntity.getBody().length);
}
}