13 – Spring boot : connecting to MongoDB

Spring boot connection to mongoDB


application.properties

    
#mongodb
spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.database=mongotuto
 
#logging
logging.level.org.springframework.data=debug
logging.level.=error
    
  

POM.xml

    

<!--xml version="1.0" encoding="UTF-8"?-->
<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/xsd/maven-4.0.0.xsd">
 <modelVersion>4.0.0</modelVersion>
 <parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>2.1.4.RELEASE</version>
  <relativePath/> <!-- lookup parent from repository -->
 </parent>
 <groupId>com.example</groupId>
 <artifactId>SpringBootMongoDB03</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <name>SpringBootMongoDB03</name>
 <description>Demo project for Spring Boot</description>

 <properties>
  <java.version>1.8</java.version>
 </properties>

 <dependencies>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-mongodb</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
  </dependency>

  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-devtools</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 Main class

package com.example.discovery;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringBootMongoDb03Application {

 public static void main(String[] args) {
  SpringApplication.run(SpringBootMongoDb03Application.class, args);
 }

}


  

Entity Car

package com.example.discovery;

import org.bson.types.ObjectId;
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

@Document(collection = "Car")
public class Car {

 @Id 
 public ObjectId _id;
 public String brand;
 public String name;
 public String color;
 
 public Car(ObjectId _id, String name, String brand, String color) {
      this._id = _id;
      this.name = name;
      this.brand = brand;
      this.color = color;
    }

 public ObjectId get_id() {
  return _id;
 }

 public void set_id(ObjectId _id) {
  this._id = _id;
 }

 public String getbrand() {
  return brand;
 }

 public void setbrand(String brand) {
  this.brand = brand;
 }

 public String getName() {
  return name;
 }

 public void setName(String name) {
  this.name = name;
 }

 public String getcolor() {
  return color;
 }

 public void setcolor(String color) {
  this.color = color;
 }
 
 
}

  

CarRepository

package com.example.discovery;

import org.bson.types.ObjectId;
import org.springframework.data.mongodb.repository.MongoRepository;

public interface CarRepository extends MongoRepository {
   Car findBy_id(ObjectId _id);
 }
  

CarController

package com.example.discovery;

import java.util.List;

import javax.validation.Valid;

import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/cars")
public class CarController {
  @Autowired
  private CarRepository repository;
  
  @RequestMapping(value = "/", method = RequestMethod.GET)
  public List getAllCars() {
    return repository.findAll();
  }
  
  @RequestMapping(value = "/{id}", method = RequestMethod.GET)
  public Car getCarById(@PathVariable("id") ObjectId id) {
    return repository.findBy_id(id);
  }
  
  @RequestMapping(value = "/", method = RequestMethod.POST)
  public Car createCar(@Valid @RequestBody Car Cars) {
    Cars.set_id(ObjectId.get());
    repository.save(Cars);
    return Cars;
  }
  
  @RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
  public void deleteCar(@PathVariable ObjectId id) {
    repository.delete(repository.findBy_id(id));
  }
  
  @RequestMapping(value = "/{id}", method = RequestMethod.PUT)
  public void modifyCarById(@PathVariable("id") ObjectId id, @Valid @RequestBody Car Cars) {
    Cars.set_id(id);
    repository.save(Cars);
  }
  
 
}

  

This is just a trick, hope it paved your way out.