Spring-boot访问MongoDB

1、访问配置信息

package hello;



import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.data.authentication.UserCredentials;

import org.springframework.data.mongodb.config.AbstractMongoConfiguration;

import org.springframework.data.mongodb.core.MongoOperations;

import org.springframework.data.mongodb.core.MongoTemplate;



import com.mongodb.Mongo;

import com.mongodb.MongoClient;



@Configuration

public class MongoConfig extends AbstractMongoConfiguration {

 

    @Bean

    public Mongo mongo() throws Exception {

        return new MongoClient();

    }

 

    @Bean

    public MongoTemplate mongoTemplate() throws Exception {

        UserCredentials user = new UserCredentials("scott", "tiger");

        return new MongoTemplate(mongo(), "test1", user);

    }



    @Override

    protected String getDatabaseName() {

        // TODO Auto-generated method stub

        return "test1";

    }

 

}

 

2、POJO类

package hello;



import org.springframework.data.annotation.Id;





public class Customer {



    @Id

    private String id;



    private String firstName;

    private String lastName;



    public Customer() {}



    public Customer(String firstName, String lastName) {

        this.firstName = firstName;

        this.lastName = lastName;

    }



    @Override

    public String toString() {

        return String.format(

                "Customer[id=%s, firstName='%s', lastName='%s']",

                id, firstName, lastName);

    }



}

 

3、Repository接口

package hello;



import java.util.List;



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



public interface CustomerRepository extends MongoRepository<Customer, String> {



    public Customer findByFirstName(String firstName);

    public List<Customer> findByLastName(String lastName);



}

 

4、Application

package hello;



import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.boot.CommandLineRunner;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.AutoConfigureBefore;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.context.annotation.Import;



@SpringBootApplication

@AutoConfigureBefore

@Import(MongoConfig.class)

public class Application implements CommandLineRunner {



    @Autowired

    private CustomerRepository repository;



    public static void main(String[] args) {

        SpringApplication.run(Application.class, args);

    }



    @Override

    public void run(String... args) throws Exception {



        repository.deleteAll();



        // save a couple of customers

        repository.save(new Customer("Alice", "Smith"));

        repository.save(new Customer("Bob", "Smith"));



        // fetch all customers

        System.out.println("Customers found with findAll():");

        System.out.println("-------------------------------");

        for (Customer customer : repository.findAll()) {

            System.out.println(customer);

        }

        System.out.println();



        // fetch an individual customer

        System.out.println("Customer found with findByFirstName('Alice'):");

        System.out.println("--------------------------------");

        System.out.println(repository.findByFirstName("Alice"));



        System.out.println("Customers found with findByLastName('Smith'):");

        System.out.println("--------------------------------");

        for (Customer customer : repository.findByLastName("Smith")) {

            System.out.println(customer);

        }



    }



}