springbootBoot integrates MongDB

  

  environment

          jdk1.8

          maven

   

  tool

         idea

 

   Architecture

        springboot   

  

 

  (1) Install MongoDB

   

              You can refer to the tutorial I wrote: http://chuichuige.iteye.com/admin/blogs/2401146

 

   (2) Use idea to build a springboot project

 

           You can refer to   http://blog.csdn.net/u013248535/article/details/55100979

 

   (3) Modify the pom.xml file

 

          

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

 

 

   (4) Add the MongoDB data configuration in the application.properties file (this place must be configured with MongoDB to add users)

  

 Note: After the MongoDB database configuration is completed, the user root password root must be added

   

  The method of adding may be different due to the different versions downloaded.

   

  For details, please refer to  

     http://chuichuige.iteye.com/blog/2401151

  

   

  

    

spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.database=admin
spring.data.mongodb.username=root
spring.data.mongodb.password=root

 

 

 

 

     (5) Write database Dao layer code

 

  Note: do not write  findUserByUsername as findUserByUserName, if it is written in this way, it will violate the specification of jpa, and an error will be reported

 

   Reference: http://blog.csdn.net/u022812849/article/details/44277355

 

package mongodb.dao;

import mongodb.pojo.User;
import org.springframework.data.mongodb.repository.MongoRepository;

/**
 * Created by pactera on 2017/11/26.
 */
public interface UserRepository extends MongoRepository<User,Long> {


       User findUserByUsername(String  username);

}

  

 

    (6) Use springboot unit test

 

    

package mongodb;


import mongodb.dao.UserRepository;
import mongodb.pojo.User;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.List;

/* Created by pactera on 2017/11/26.
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class AppTest {

    @Autowired
    private UserRepository userRepository;

    // delete all data
/*    @Before
    public void  setUp(){

        System.out.println(" --- delete all data start ----- ");
        userRepository.deleteAll();
        System.out.println(" --- delete all data end ----- ");

    }*/


    // add user test
/*
    @Test
    public  void  test(){

        // Add user
        userRepository.save(new User(1L,"lyf","123456"));
        userRepository.save(new User(2L,"lyf2","1234567"));
        userRepository.save(new User(3L,"lyf3","12345678"));

        //delete users
        //userRepository.delete(1L);
        System.out.println(userRepository.findAll().size());

    }


    */
/**
     * Query user test
     *//*

    @Test
    public  void  testQuery(){
        List<User> users = userRepository.findAll();
        for (User user:
             users) {
            System.out.println("-----");
            System.out.println(user);
        }
    }
*/


    /**
     * Query user name based on user name
     *
     */
    @Test
    public  void   testQueryfindUserByUsername(){
        User user = userRepository.findUserByUsername("lyf");
        System.out.println(user);
    }

}

 

 

 The final test results are as follows (due to the time relationship, after I added users after the test, I tested querying users based on their user names),

 

The test results are as follows

 

  

 

   Code cloud git source code:   https://gitee.com/chui0704/springboot

 

  Reference: http://blog.didispace.com/springbootmongodb/ (Because it is a little different from what the author wrote, I wrote one myself)