#RequestMapping not redirecting to the specified URL : Spring Boot application - spring

Question

I am trying to create a sample spring boot application which can connect to postgres. But I am not able to redirect to the path specified in the rest controller. The code for my project is given below:
pom.xml
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.vmware.springboot</groupId>
<artifactId>SpringBootSample</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>SpringBootDemo1</name>
<description>Sample project for Spring Eureka</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
application.properties
server.port=3000
spring.datasource.url= jdbc:postgresql://localhost:5432/local_db
spring.datasource.data-username=postgres
spring.datasource.data-password=postgres
spring.jpa.hibernate.ddl-auto=create-drop
SpringBootExampleApplication.java
package org.kumar.springboot;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.kumar.spring.enitiy.Employee;
#SpringBootApplication
#ComponentScan
public class SpringBootExampleApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootExampleApplication.class, args);
}
}
EmployeeController.java
package org.kumar.spring.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.kumar.spring.enitiy.Employee;
import org.kumar.spring.repository.EmployeeRepository;
#RestController
#RequestMapping("/data")
public class EmployeeController {
#Autowired
private EmployeeRepository employeeRepository;
#RequestMapping("/employees")
public List<Employee> getEmployees(){
return (List<Employee>)employeeRepository.findAll();
}
}
Employee.java
package org.kumar.spring.enitiy;
public class Employee {
private String employeeId;
private String employeeName;
public String getEmployeeId() {
return employeeId;
}
public void setEmployeeId(String employeeId) {
this.employeeId = employeeId;
}
public String getEmployeeName() {
return employeeName;
}
public void setEmployeeName(String employeeName) {
this.employeeName = employeeName;
}
#Override
public String toString() {
return "Employee [employeeId=" + employeeId + ", employeeName=" + employeeName + "]";
}
public Employee(String employeeId, String employeeName) {
super();
this.employeeId = employeeId;
this.employeeName = employeeName;
}
}
EmployeeRepository.java
package org.kumar.spring.repository;
import org.springframework.data.repository.CrudRepository;
import org.kumar.spring.enitiy.Employee;
public interface EmployeeRepository extends CrudRepository<Employee, String>
{
}
I am trying to run the following:
Request : GET http://localhost:3000/data/employees
Response :
{
"timestamp": 1492152367659,
"status": 404,
"error": "Not Found",
"message": "No message available",
"path": "/data/employees"
}
What mistake am I committing.

Answer 1

Basically, your EmployeeController class has not been detected/scanned by the Spring container because of the classes are in different package hierarchy and the container has not been instructed to scan in which package to look for.
So there are two options to solve the issue:
(1) Change your SpringBootExampleApplication class package to org.kumar.spring
(2) Add #ComponentScan(basePackages = {"org.kumar.spring"})
I suggest you prefer the option(1) above otherwise, for option(2), you need to add #EnableJpaRepositories to make the program to work from end to end (i.e., connecting to the database using your EmployeeRepository class).